version 6.1

no longer create useless assignment code for r0=r0

.idea/inspectionProfiles/Project_Default.xml

@@ -3,14 +3,11 @@
     <option name="myName" value="Project Default" />
     <inspection_tool class="DuplicatedCode" enabled="true" level="WEAK WARNING" enabled_by_default="true">
       <Languages>
-        <language minSize="100" isEnabled="false" name="JavaScript" />
-        <language isEnabled="false" name="Groovy" />
-        <language isEnabled="false" name="Style Sheets" />
         <language minSize="70" name="Kotlin" />
-        <language isEnabled="false" name="TypeScript" />
+        <language isEnabled="false" name="Groovy" />
-        <language isEnabled="false" name="ActionScript" />
       </Languages>
     </inspection_tool>
+    <inspection_tool class="PyInterpreterInspection" enabled="false" level="WARNING" enabled_by_default="false" />
     <inspection_tool class="SpellCheckingInspection" enabled="true" level="TYPO" enabled_by_default="true">
       <option name="processCode" value="false" />
       <option name="processLiterals" value="true" />

.idea/modules.xml

@@ -3,6 +3,7 @@
   <component name="ProjectModuleManager">
     <modules>
       <module fileurl="file://$PROJECT_DIR$/compiler/compiler.iml" filepath="$PROJECT_DIR$/compiler/compiler.iml" />
+      <module fileurl="file://$PROJECT_DIR$/compilerAst/compilerAst.iml" filepath="$PROJECT_DIR$/compilerAst/compilerAst.iml" />
       <module fileurl="file://$PROJECT_DIR$/dbusCompilerService/dbusCompilerService.iml" filepath="$PROJECT_DIR$/dbusCompilerService/dbusCompilerService.iml" />
       <module fileurl="file://$PROJECT_DIR$/docs/docs.iml" filepath="$PROJECT_DIR$/docs/docs.iml" />
       <module fileurl="file://$PROJECT_DIR$/examples/examples.iml" filepath="$PROJECT_DIR$/examples/examples.iml" />

compiler/build.gradle

@@ -1,7 +1,7 @@
 plugins {
     id 'java'
     id 'application'
-    id "org.jetbrains.kotlin.jvm" version "1.4.21"
+    id "org.jetbrains.kotlin.jvm" version "1.4.30"
     id 'org.jetbrains.dokka' version "0.9.18"
     id 'com.github.johnrengelman.shadow' version '6.1.0'
 }
@@ -18,14 +18,12 @@ repositories {
 def prog8version = rootProject.file('compiler/res/version.txt').text.trim()
 
 dependencies {
-    implementation project(':parser')
+    implementation project(':compilerAst')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
     // implementation "org.jetbrains.kotlin:kotlin-reflect"
-    implementation 'org.antlr:antlr4-runtime:4.8'
     implementation 'org.jetbrains.kotlinx:kotlinx-cli:0.3.1'
     // implementation 'net.razorvine:ksim65:1.8'
     // implementation "com.github.hypfvieh:dbus-java:3.2.4"
-    implementation project(':parser')
 
     testImplementation "org.jetbrains.kotlin:kotlin-test-junit5"
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.3.2'

compiler/compiler.iml

@@ -11,9 +11,8 @@
     <orderEntry type="jdk" jdkName="11" jdkType="JavaSDK" />
     <orderEntry type="sourceFolder" forTests="false" />
     <orderEntry type="library" name="KotlinJavaRuntime" level="project" />
-    <orderEntry type="module" module-name="parser" />
     <orderEntry type="library" name="unittest-libs" level="project" />
     <orderEntry type="library" name="kotlinx-cli-jvm" level="project" />
-    <orderEntry type="library" name="antlr-runtime-4.9" level="project" />
+    <orderEntry type="module" module-name="compilerAst" />
   </component>
 </module>

compiler/res/prog8lib/c64/graphics.p8

@@ -34,6 +34,7 @@ graphics {
     sub line(uword @zp x1, ubyte @zp y1, uword @zp x2, ubyte @zp y2) {
         ; Bresenham algorithm.
         ; This code special-cases various quadrant loops to allow simple ++ and -- operations.
+        ; TODO there are some slight errors at the first/last pixels in certain slopes...??
         if y1>y2 {
             ; make sure dy is always positive to have only 4 instead of 8 special cases
             swap(x1, x2)

compiler/res/prog8lib/c64/textio.p8

@@ -31,6 +31,16 @@ sub spc() {
     txt.chrout(' ')
 }
 
+asmsub column(ubyte col @A) clobbers(A, X, Y) {
+    ; ---- set the cursor on the given column (starting with 0) on the current line
+    %asm {{
+        sec
+        jsr  c64.PLOT
+        tay
+        clc
+        jmp  c64.PLOT
+    }}
+}
 
 asmsub  fill_screen (ubyte char @ A, ubyte color @ Y) clobbers(A)  {
 	; ---- fill the character screen with the given fill character and character color.

compiler/res/prog8lib/cx16/gfx2.p8

@@ -1,33 +1,43 @@
 %target cx16
 
-; Bitmap pixel graphics module for the CommanderX16
+; Bitmap pixel graphics routines for the CommanderX16
 ; Custom routines to use the full-screen 640x480 and 320x240 screen modes.
-; This only works on the Cx16. No text layer is currently shown, text can be drawn as part of the bitmap itself.
+; (These modes are not supported by the documented GRAPH_xxxx kernel routines)
-; Note: for compatible graphics code that words on C64 too, use the "graphics" module instead.
+;
-; Note: there is no color palette manipulation here, you have to do that yourself or use the "palette" module.
+; No text layer is currently shown, text can be drawn as part of the bitmap itself.
+; Note: for similar graphics routines that also work on the C-64, use the "graphics" module instead.
+; Note: for color palette manipulation, use the "palette" module or write Vera registers yourself.
+; Note: this library implements code for various resolutions and color depths. This takes up memory.
+;       If you're memory constrained you should probably not use this built-in library,
+;       but make a copy in your project only containing the code for the required resolution.
+;
+;
+; SCREEN MODE LIST:
+;   mode 0 = reset back to default text mode
+;   mode 1 = bitmap 320 x 240 monochrome
+;   mode 2 = bitmap 320 x 240 x 4c (unsupported TODO not yet implemented)
+;   mode 3 = bitmap 320 x 240 x 16c (unsupported TODO not yet implemented)
+;   mode 4 = bitmap 320 x 240 x 256c
+;   mode 5 = bitmap 640 x 480 monochrome
+;   mode 6 = bitmap 640 x 480 x 4c (unsupported TODO being implemented)
+;   mode 7 = bitmap 640 x 480 x 16c (unsupported due to lack of VRAM)
+;   mode 8 = bitmap 640 x 480 x 256c (unsupported due to lack of VRAM)
 
 ; TODO can we make a FB vector table and emulation routines for the Cx16s' GRAPH_init() call? to replace the builtin 320x200 fb driver?
 
 gfx2 {
 
     ; read-only control variables:
-    ubyte active_mode = 255
+    ubyte active_mode = 0
     uword width = 0
     uword height = 0
     ubyte bpp = 0
     ubyte monochrome_dont_stipple_flag = false            ; set to false to enable stippling mode in monochrome displaymodes
 
     sub screen_mode(ubyte mode) {
-        ; mode 0 = bitmap 320 x 240 x 1c monochrome
-        ; mode 1 = bitmap 320 x 240 x 256c
-        ; mode 128 = bitmap 640 x 480 x 1c monochrome
-        ; ...other modes?
-
-        ; copy the lower-case charset to the upper part of the vram, so we can use it later to plot text
-
         when mode {
-            0 -> {
+            1 -> {
-                ; 320 x 240 x 1c
+                ; lores monchrome
                 cx16.VERA_DC_VIDEO = (cx16.VERA_DC_VIDEO & %11001111) | %00100000      ; enable only layer 1
                 cx16.VERA_DC_HSCALE = 64
                 cx16.VERA_DC_VSCALE = 64
@@ -38,8 +48,9 @@ gfx2 {
                 height = 240
                 bpp = 1
             }
-            1 -> {
+            ; TODO modes 2, 3 not yet implemented
-                ; 320 x 240 x 256c
+            4 -> {
+                ; lores 256c
                 cx16.VERA_DC_VIDEO = (cx16.VERA_DC_VIDEO & %11001111) | %00100000      ; enable only layer 1
                 cx16.VERA_DC_HSCALE = 64
                 cx16.VERA_DC_VSCALE = 64
@@ -50,8 +61,8 @@ gfx2 {
                 height = 240
                 bpp = 8
             }
-            128 -> {
+            5 -> {
-                ; 640 x 480 x 1c
+                ; highres monochrome
                 cx16.VERA_DC_VIDEO = (cx16.VERA_DC_VIDEO & %11001111) | %00100000      ; enable only layer 1
                 cx16.VERA_DC_HSCALE = 128
                 cx16.VERA_DC_VSCALE = 128
@@ -62,13 +73,27 @@ gfx2 {
                 height = 480
                 bpp = 1
             }
-            255 -> {
+            6 -> {
+                ; highres 4c
+                cx16.VERA_DC_VIDEO = (cx16.VERA_DC_VIDEO & %11001111) | %00100000      ; enable only layer 1
+                cx16.VERA_DC_HSCALE = 128
+                cx16.VERA_DC_VSCALE = 128
+                cx16.VERA_L1_CONFIG = %00000101
+                cx16.VERA_L1_MAPBASE = 0
+                cx16.VERA_L1_TILEBASE = %00000001
+                width = 640
+                height = 480
+                bpp = 2
+            }
+            ; modes 7 and 8 not supported due to lack of VRAM
+            else -> {
                 ; back to default text mode and colors
                 cx16.VERA_CTRL = %10000000      ; reset VERA and palette
                 c64.CINT()      ; back to text mode
                 width = 0
                 height = 0
                 bpp = 0
+                mode = 0
             }
         }
 
@@ -81,21 +106,28 @@ gfx2 {
         monochrome_stipple(false)
         position(0, 0)
         when active_mode {
-            0 -> {
+            1 -> {
-                ; 320 x 240 x 1c
+                ; lores monochrome
                 repeat 240/2/8
                     cs_innerloop640()
             }
-            1 -> {
+            ; TODO mode 2, 3
-                ; 320 x 240 x 256c
+            4 -> {
+                ; lores 256c
                 repeat 240/2
                     cs_innerloop640()
             }
-            128 -> {
+            5 -> {
-                ; 640 x 480 x 1c
+                ; highres monochrome
                 repeat 480/8
                     cs_innerloop640()
             }
+            6 -> {
+                ; highres 4c
+                repeat 480/4
+                    cs_innerloop640()
+            }
+            ; modes 7 and 8 not supported due to lack of VRAM
         }
         position(0, 0)
     }
@@ -130,30 +162,8 @@ gfx2 {
         if length==0
             return
         when active_mode {
-            1 -> {
+            1, 5 -> {
-                ; 8bpp mode
+                ; monochrome modes, either resolution
-                position(x, y)
-                %asm {{
-                    lda  color
-                    phx
-                    ldx  length+1
-                    beq  +
-                    ldy  #0
--                   sta  cx16.VERA_DATA0
-                    iny
-                    bne  -
-                    dex
-                    bne  -
-+                   ldy  length     ; remaining
-                    beq  +
--                   sta  cx16.VERA_DATA0
-                    dey
-                    bne  -
-+                   plx
-                }}
-            }
-            0, 128 -> {
-                ; 1 bpp mode
                 ubyte separate_pixels = (8-lsb(x)) & 7
                 if separate_pixels as uword > length
                     separate_pixels = lsb(length)
@@ -205,32 +215,93 @@ _done
                         x++
                     }
                 }
-                cx16.VERA_ADDR_H = (cx16.VERA_ADDR_H & %00000111)   ; vera auto-increment off again
+                cx16.VERA_ADDR_H &= %00000111   ; vera auto-increment off again
+            }
+            4 -> {
+                ; lores 256c
+                position(x, y)
+                %asm {{
+                    lda  color
+                    phx
+                    ldx  length+1
+                    beq  +
+                    ldy  #0
+-                   sta  cx16.VERA_DATA0
+                    iny
+                    bne  -
+                    dex
+                    bne  -
++                   ldy  length     ; remaining
+                    beq  +
+-                   sta  cx16.VERA_DATA0
+                    dey
+                    bne  -
++                   plx
+                }}
+            }
+            6 -> {
+                ; highres 4c
+                ; TODO also mostly usable for lores 4c?
+                color &= 3
+                ubyte[4] colorbits
+                ubyte ii
+                for ii in 3 downto 0 {
+                    colorbits[ii] = color
+                    color <<= 2
+                }
+                void addr_mul_24_for_highres_4c(y, x)      ; 24 bits result is in r0 and r1L (highest byte)
+                %asm {{
+                    lda  cx16.VERA_ADDR_H
+                    and  #%00000111         ; no auto advance
+                    sta  cx16.VERA_ADDR_H
+                    stz  cx16.VERA_CTRL     ; setup vera addr 0
+                    lda  cx16.r1
+                    and  #1
+                    sta  cx16.VERA_ADDR_H
+                    lda  cx16.r0
+                    sta  cx16.VERA_ADDR_L
+                    lda  cx16.r0+1
+                    sta  cx16.VERA_ADDR_M
+                    phx
+                    ldx  x
+                }}
+
+                repeat length {
+                    %asm {{
+                        txa
+                        and  #3
+                        tay
+                        lda  cx16.VERA_DATA0
+                        and  gfx2.plot.mask4c,y
+                        ora  colorbits,y
+                        sta  cx16.VERA_DATA0
+                        cpy  #%00000011         ; next vera byte?
+                        bne  +
+                        inc  cx16.VERA_ADDR_L
+                        bne  +
+                        inc  cx16.VERA_ADDR_M
++                       bne  +
+                        inc  cx16.VERA_ADDR_H
++                       inx                     ; next pixel
+                    }}
+                }
+
+                %asm {{
+                    plx
+                }}
             }
         }
     }
 
     sub vertical_line(uword x, uword y, uword height, ubyte color) {
         position(x,y)
-        if active_mode==1 {
+        when active_mode {
-            ; set vera auto-increment to 320 pixel increment (=next line)
+            1, 5 -> {
-            cx16.VERA_ADDR_H = (cx16.VERA_ADDR_H & %00000111) | (14<<4)
+                ; monochrome, either resolution
-            %asm {{
-                ldy  height
-                beq  +
-                lda  color
--               sta  cx16.VERA_DATA0
-                dey
-                bne  -
-+
-            }}
-            return
-        }
-
                 ; note for the 1 bpp modes we can't use vera's auto increment mode because we have to 'or' the pixel data in place.
-        cx16.VERA_ADDR_H = (cx16.VERA_ADDR_H & %00000111)   ; no auto advance
+                cx16.VERA_ADDR_H &= %00000111   ; no auto advance
                 cx16.r15 = gfx2.plot.bits[x as ubyte & 7]           ; bitmask
-        if active_mode>=128
+                if active_mode>=5
                     cx16.r14 = 640/8
                 else
                     cx16.r14 = 320/8
@@ -268,11 +339,11 @@ _done
                             lda  cx16.VERA_ADDR_M
                             adc  #0
                             sta  cx16.VERA_ADDR_M
-+
+        +
                             asl  cx16.r14
                             ldy  height
                             beq  +
--                   lda  cx16.VERA_DATA0
+        -                   lda  cx16.VERA_DATA0
                             ora  cx16.r15
                             sta  cx16.VERA_DATA0
                             lda  cx16.VERA_ADDR_L
@@ -287,7 +358,7 @@ _done
                             ; sta  cx16.VERA_ADDR_H
                             dey
                             bne  -
-+
+        +
                         }}
                     }
                 } else {
@@ -311,10 +382,57 @@ _done
                     }
                 }
             }
+            4 -> {
+                ; lores 256c
+                ; set vera auto-increment to 320 pixel increment (=next line)
+                cx16.VERA_ADDR_H = cx16.VERA_ADDR_H & %00000111 | (14<<4)
+                %asm {{
+                    ldy  height
+                    beq  +
+                    lda  color
+-                   sta  cx16.VERA_DATA0
+                    dey
+                    bne  -
++
+                }}
+            }
+            6 -> {
+                ; highres 4c
+                ; note for this mode we can't use vera's auto increment mode because we have to 'or' the pixel data in place.
+                cx16.VERA_ADDR_H &= %00000111   ; no auto advance
+                ; TODO also mostly usable for lores 4c?
+                void addr_mul_24_for_highres_4c(y, x)      ; 24 bits result is in r0 and r1L (highest byte)
+
+                ; TODO optimize the loop in pure assembly
+                color &= 3
+                color <<= gfx2.plot.shift4c[lsb(x) & 3]
+                ubyte mask = gfx2.plot.mask4c[lsb(x) & 3]
+                repeat height {
+                    ubyte value = cx16.vpeek(lsb(cx16.r1), cx16.r0) & mask | color
+                    cx16.vpoke(lsb(cx16.r1), cx16.r0, value)
+                    %asm {{
+                        ; 24 bits add 160 (640/4)
+                        clc
+                        lda  cx16.r0
+                        adc  #640/4
+                        sta  cx16.r0
+                        lda  cx16.r0+1
+                        adc  #0
+                        sta  cx16.r0+1
+                        bcc  +
+                        inc  cx16.r1
++
+                    }}
+                }
+            }
+        }
+
+    }
 
     sub line(uword @zp x1, uword @zp y1, uword @zp x2, uword @zp y2, ubyte color) {
         ; Bresenham algorithm.
         ; This code special-cases various quadrant loops to allow simple ++ and -- operations.
+        ; TODO there are some slight errors at the first/last pixels in certain slopes...
         if y1>y2 {
             ; make sure dy is always positive to have only 4 instead of 8 special cases
             swap(x1, x2)
@@ -468,11 +586,14 @@ _done
 
     sub plot(uword @zp x, uword y, ubyte color) {
         ubyte[8] bits = [128, 64, 32, 16, 8, 4, 2, 1]
+        ubyte[4] mask4c = [%00111111, %11001111, %11110011, %11111100]
+        ubyte[4] shift4c = [6,4,2,0]
         uword addr
         ubyte value
 
         when active_mode {
-            0 -> {
+            1 -> {
+                ; lores monochrome
                 %asm {{
                     lda  x
                     eor  y
@@ -490,7 +611,16 @@ _done
                     }
                 }
             }
-            128 -> {
+            4 -> {
+                ; lores 256c
+                void addr_mul_24_for_lores_256c(y, x)      ; 24 bits result is in r0 and r1L (highest byte)
+                cx16.vpoke(lsb(cx16.r1), cx16.r0, color)
+                ; activate vera auto-increment mode so next_pixel() can be used after this
+                cx16.VERA_ADDR_H = cx16.VERA_ADDR_H & %00000111 | %00010000
+                color = cx16.VERA_DATA0
+            }
+            5 -> {
+                ; highres monochrome
                 %asm {{
                     lda  x
                     eor  y
@@ -508,30 +638,44 @@ _done
                     }
                 }
             }
-            1 -> {
+            6 -> {
-                void addr_mul_320_add_24(y, x)      ; 24 bits result is in r0 and r1L
+                ; highres 4c
-                value = lsb(cx16.r1)
+                ; TODO also mostly usable for lores 4c?
-                cx16.vpoke(value, cx16.r0, color)
+                void addr_mul_24_for_highres_4c(y, x)      ; 24 bits result is in r0 and r1L (highest byte)
-                ; activate vera auto-increment mode so next_pixel() can be used after this
+                color &= 3
-                cx16.VERA_ADDR_H = (cx16.VERA_ADDR_H & %00000111) | %00010000
+                color <<= shift4c[lsb(x) & 3]
-                color = cx16.VERA_DATA0
+                ; TODO optimize the vera memory manipulation in pure assembly
+                cx16.VERA_ADDR_H &= %00000111   ; no auto advance
+                value = cx16.vpeek(lsb(cx16.r1), cx16.r0) & mask4c[lsb(x) & 3] | color
+                cx16.vpoke(lsb(cx16.r1), cx16.r0, value)
             }
         }
     }
 
     sub position(uword @zp x, uword y) {
+        ubyte bank
         when active_mode {
-            0 -> {
+            1 -> {
+                ; lores monochrome
                 cx16.r0 = y*(320/8) + x/8
                 cx16.vaddr(0, cx16.r0, 0, 1)
             }
-            128 -> {
+            ; TODO modes 2,3
+            4 -> {
+                ; lores 256c
+                void addr_mul_24_for_lores_256c(y, x)      ; 24 bits result is in r0 and r1L (highest byte)
+                bank = lsb(cx16.r1)
+                cx16.vaddr(bank, cx16.r0, 0, 1)
+            }
+            5 -> {
+                ; highres monochrome
                 cx16.r0 = y*(640/8) + x/8
                 cx16.vaddr(0, cx16.r0, 0, 1)
             }
-            1 -> {
+            6 -> {
-                void addr_mul_320_add_24(y, x)      ; 24 bits result is in r0 and r1L
+                ; highres 4c
-                ubyte bank = lsb(cx16.r1)
+                void addr_mul_24_for_highres_4c(y, x)      ; 24 bits result is in r0 and r1L (highest byte)
+                bank = lsb(cx16.r1)
                 cx16.vaddr(bank, cx16.r0, 0, 1)
             }
         }
@@ -541,6 +685,7 @@ _done
         ; -- sets the next pixel byte to the graphics chip.
         ;    for 8 bpp screens this will plot 1 pixel.
         ;    for 1 bpp screens it will plot 8 pixels at once (color = bit pattern).
+        ;    for 2 bpp screens it will plot 4 pixels at once (color = bit pattern).
         %asm {{
             sta  cx16.VERA_DATA0
         }}
@@ -550,6 +695,7 @@ _done
         ; -- sets the next bunch of pixels from a prepared array of bytes.
         ;    for 8 bpp screens this will plot 1 pixel per byte.
         ;    for 1 bpp screens it will plot 8 pixels at once (colors are the bit patterns per byte).
+        ;    for 2 bpp screens it will plot 4 pixels at once (colors are the bit patterns per byte).
         %asm {{
             phx
             sta  P8ZP_SCRATCH_W1
@@ -614,13 +760,13 @@ _done
     sub text(uword @zp x, uword y, ubyte color, uword sctextptr) {
         ; -- Write some text at the given pixel position. The text string must be in screencode encoding (not petscii!).
         ;    You must also have called text_charset() first to select and prepare the character set to use.
-        ;    NOTE: in monochrome (1bpp) screen modes, x position is currently constrained to mulitples of 8 !
+        ;    NOTE: in monochrome (1bpp) screen modes, x position is currently constrained to mulitples of 8 !  TODO allow per-pixel horizontal positioning
         uword chardataptr
         when active_mode {
-            0, 128 -> {
+            1, 5 -> {
-                ; 1-bitplane modes
+                ; monochrome mode, either resolution
                 cx16.r2 = 40
-                if active_mode>=128
+                if active_mode>=5
                     cx16.r2 = 80
                 while @(sctextptr) {
                     chardataptr = charset_addr + (@(sctextptr) as uword)*8
@@ -660,8 +806,8 @@ _done
                     sctextptr++
                 }
             }
-            1 -> {
+            4 -> {
-                ; 320 x 240 x 256c
+                ; lores 256c
                 while @(sctextptr) {
                     chardataptr = charset_addr + (@(sctextptr) as uword)*8
                     cx16.vaddr(charset_bank, chardataptr, 1, 1)
@@ -689,6 +835,28 @@ _done
                     sctextptr++
                 }
             }
+            6 -> {
+                ; hires 4c
+                while @(sctextptr) {
+                    chardataptr = charset_addr + (@(sctextptr) as uword)*8
+                    repeat 8 {
+                        ; TODO rewrite this inner loop in assembly
+                        ubyte charbits = cx16.vpeek(charset_bank, chardataptr)
+                        repeat 8 {
+                            charbits <<= 1
+                            if_cs
+                                plot(x, y, color)
+                            x++
+                        }
+                        x-=8
+                        chardataptr++
+                        y++
+                    }
+                    x+=8
+                    y-=8
+                    sctextptr++
+                }
+            }
         }
     }
 
@@ -709,7 +877,40 @@ _done
         }}
     }
 
-    asmsub addr_mul_320_add_24(uword address @R0, uword value @AY) clobbers(A) -> uword @R0, ubyte @R1  {
+    sub addr_mul_24_for_highres_4c(uword yy, uword xx) {
+        ; TODO turn into asmsub
+        ; 24 bits result is in r0 and r1L (highest byte)
+        cx16.r0 = yy*128
+        cx16.r2 = yy*32
+        xx >>= 2
+
+        %asm {{
+            ; add r2 and xx to r0 (24-bits)
+            stz  cx16.r1
+            clc
+            lda  cx16.r0
+            adc  cx16.r2
+            sta  cx16.r0
+            lda  cx16.r0+1
+            adc  cx16.r2+1
+            sta  cx16.r0+1
+            bcc  +
+            inc  cx16.r1
++           clc
+            lda  cx16.r0
+            adc  xx
+            sta  cx16.r0
+            lda  cx16.r0+1
+            adc  xx+1
+            sta  cx16.r0+1
+            bcc  +
+            inc  cx16.r1
++
+        }}
+    }
+
+    asmsub addr_mul_24_for_lores_256c(uword yy @R0, uword xx @AY) clobbers(A) -> uword @R0, ubyte @R1  {
+            ; yy * 320 + xx (24 bits calculation)
             %asm {{
                 sta  P8ZP_SCRATCH_W1
                 sty  P8ZP_SCRATCH_W1+1

compiler/res/prog8lib/cx16/palette.p8

@@ -13,30 +13,40 @@ palette {
         cx16.vpoke(1, $fa01+index*2, msb(color))
     }
 
-    sub set_rgb4(uword palletteptr, uword num_colors) {
+    sub set_rgb4(uword palette_bytes_ptr, uword num_colors) {
         ; 2 bytes per color entry, the Vera uses this, but the R/GB bytes order is swapped
         vera_palette_ptr = $fa00
         repeat num_colors {
-            cx16.vpoke(1, vera_palette_ptr+1, @(palletteptr))
+            cx16.vpoke(1, vera_palette_ptr+1, @(palette_bytes_ptr))
-            palletteptr++
+            palette_bytes_ptr++
-            cx16.vpoke(1, vera_palette_ptr, @(palletteptr))
+            cx16.vpoke(1, vera_palette_ptr, @(palette_bytes_ptr))
-            palletteptr++
+            palette_bytes_ptr++
             vera_palette_ptr+=2
         }
     }
 
-    sub set_rgb8(uword palletteptr, uword num_colors) {
+    sub set_rgb(uword palette_words_ptr, uword num_colors) {
+        ; 1 word per color entry (in little endian format so $gb0r)
+        vera_palette_ptr = $fa00
+        repeat num_colors*2 {
+            cx16.vpoke(1, vera_palette_ptr, @(palette_words_ptr))
+            palette_words_ptr++
+            vera_palette_ptr++
+        }
+    }
+
+    sub set_rgb8(uword palette_bytes_ptr, uword num_colors) {
         ; 3 bytes per color entry, adjust color depth from 8 to 4 bits per channel.
         vera_palette_ptr = $fa00
         ubyte red
         ubyte greenblue
         repeat num_colors {
-            red = @(palletteptr) >> 4
+            red = @(palette_bytes_ptr) >> 4
-            palletteptr++
+            palette_bytes_ptr++
-            greenblue = @(palletteptr) & %11110000
+            greenblue = @(palette_bytes_ptr) & %11110000
-            palletteptr++
+            palette_bytes_ptr++
-            greenblue |= @(palletteptr) >> 4    ; add Blue
+            greenblue |= @(palette_bytes_ptr) >> 4    ; add Blue
-            palletteptr++
+            palette_bytes_ptr++
             cx16.vpoke(1, vera_palette_ptr, greenblue)
             vera_palette_ptr++
             cx16.vpoke(1, vera_palette_ptr, red)
@@ -44,16 +54,16 @@ palette {
         }
     }
 
-    sub set_monochrome() {
+    sub set_monochrome(uword screencolorRGB, uword drawcolorRGB) {
         vera_palette_ptr = $fa00
-        cx16.vpoke(1, vera_palette_ptr, 0)
+        cx16.vpoke(1, vera_palette_ptr, lsb(screencolorRGB))   ; G,B
         vera_palette_ptr++
-        cx16.vpoke(1, vera_palette_ptr, 0)
+        cx16.vpoke(1, vera_palette_ptr, msb(screencolorRGB))   ; R
         vera_palette_ptr++
         repeat 255 {
-            cx16.vpoke(1, vera_palette_ptr, 255)
+            cx16.vpoke(1, vera_palette_ptr, lsb(drawcolorRGB)) ; G,B
             vera_palette_ptr++
-            cx16.vpoke(1, vera_palette_ptr, 255)
+            cx16.vpoke(1, vera_palette_ptr, msb(drawcolorRGB)) ; R
             vera_palette_ptr++
         }
     }

compiler/res/prog8lib/cx16/textio.p8

@@ -31,6 +31,16 @@ sub spc() {
     txt.chrout(' ')
 }
 
+asmsub column(ubyte col @A) clobbers(A, X, Y) {
+    ; ---- set the cursor on the given column (starting with 0) on the current line
+    %asm {{
+        sec
+        jsr  c64.PLOT
+        tay
+        clc
+        jmp  c64.PLOT
+    }}
+}
 
 asmsub  fill_screen (ubyte char @ A, ubyte color @ Y) clobbers(A)  {
 	; ---- fill the character screen with the given fill character and character color.

compiler/res/prog8lib/math.asm

@@ -1262,7 +1262,7 @@ mul_word_100	.proc
 		.pend
 
 mul_word_320	.proc
-		; AY = A * 256 + A * 64	 (msb doesn't matter)
+		; AY = A * 256 + A * 64	 (msb in Y doesn't matter)
 		sta  P8ZP_SCRATCH_B1
 		ldy  #0
 		sty  P8ZP_SCRATCH_REG

compiler/res/prog8lib/prog8_funcs.asm

@@ -1078,3 +1078,28 @@ _loop_hi	ldy  _index_first
 		.pend
 
 
+func_peekw   .proc
+	; -- read the word value on the address in AY
+	sta  P8ZP_SCRATCH_W1
+	sty  P8ZP_SCRATCH_W1+1
+	ldy  #0
+	lda  (P8ZP_SCRATCH_W1),y
+	pha
+	iny
+	lda  (P8ZP_SCRATCH_W1),y
+	tay
+	pla
+	rts
+	.pend
+
+
+func_pokew   .proc
+	; -- store the word value in AY in the address in P8ZP_SCRATCH_W1
+	sty  P8ZP_SCRATCH_REG
+	ldy  #0
+	sta  (P8ZP_SCRATCH_W1),y
+	iny
+	lda  P8ZP_SCRATCH_REG
+	sta  (P8ZP_SCRATCH_W1),y
+	rts
+	.pend

compiler/res/prog8lib/prog8_lib.asm

@@ -1071,3 +1071,4 @@ sign_extend_AY_byte	.proc
 		pla
 		rts
 		.pend
+

compiler/res/version.txt

@@ -1 +1 @@
-6.0
+6.1

compiler/src/prog8/CompilerMain.kt

@@ -1,12 +1,15 @@
 package prog8
 
-import kotlinx.cli.*
+import kotlinx.cli.ArgParser
+import kotlinx.cli.ArgType
+import kotlinx.cli.default
+import kotlinx.cli.multiple
 import prog8.ast.base.AstException
 import prog8.compiler.CompilationResult
 import prog8.compiler.compileProgram
 import prog8.compiler.target.C64Target
+import prog8.compiler.target.ICompilationTarget
 import prog8.compiler.target.Cx16Target
-import prog8.compiler.target.CompilationTarget
 import prog8.parser.ParsingFailedError
 import java.nio.file.FileSystems
 import java.nio.file.Path
@@ -32,14 +35,14 @@ fun pathFrom(stringPath: String, vararg rest: String): Path  = FileSystems.getDe
 
 
 private fun compileMain(args: Array<String>) {
-    val cli = ArgParser("prog8compiler")
+    val cli = ArgParser("prog8compiler", prefixStyle = ArgParser.OptionPrefixStyle.JVM)
-    val startEmulator by cli.option(ArgType.Boolean, shortName="emu", description = "auto-start emulator after successful compilation")
+    val startEmulator by cli.option(ArgType.Boolean, fullName = "emu", description = "auto-start emulator after successful compilation")
-    val outputDir by cli.option(ArgType.String, shortName = "out", description = "directory for output files instead of current directory").default(".")
+    val outputDir by cli.option(ArgType.String, fullName = "out", description = "directory for output files instead of current directory").default(".")
-    val dontWriteAssembly by cli.option(ArgType.Boolean, shortName = "noasm", description="don't create assembly code")
+    val dontWriteAssembly by cli.option(ArgType.Boolean, fullName = "noasm", description="don't create assembly code")
-    val dontOptimize by cli.option(ArgType.Boolean, shortName = "noopt", description = "don't perform any optimizations")
+    val dontOptimize by cli.option(ArgType.Boolean, fullName = "noopt", description = "don't perform any optimizations")
-    val watchMode by cli.option(ArgType.Boolean, shortName = "watch", description = "continuous compilation mode (watches for file changes), greatly increases compilation speed")
+    val watchMode by cli.option(ArgType.Boolean, fullName = "watch", description = "continuous compilation mode (watches for file changes), greatly increases compilation speed")
-    val slowCodegenWarnings by cli.option(ArgType.Boolean, shortName = "slowwarn", description="show debug warnings about slow/problematic assembly code generation")
+    val slowCodegenWarnings by cli.option(ArgType.Boolean, fullName = "slowwarn", description="show debug warnings about slow/problematic assembly code generation")
-    val compilationTarget by cli.option(ArgType.String, shortName = "target", description = "target output of the compiler, currently '${C64Target.name}' and '${Cx16Target.name}' available").default(C64Target.name)
+    val compilationTarget by cli.option(ArgType.String, fullName = "target", description = "target output of the compiler, currently '${C64Target.name}' and '${Cx16Target.name}' available").default(C64Target.name)
     val moduleFiles by cli.argument(ArgType.String, fullName = "modules", description = "main module file(s) to compile").multiple(999)
 
     try {
@@ -114,7 +117,7 @@ private fun compileMain(args: Array<String>) {
                 if (compilationResult.programName.isEmpty())
                     println("\nCan't start emulator because no program was assembled.")
                 else {
-                    CompilationTarget.instance.machine.launchEmulator(compilationResult.programName)
+                    ICompilationTarget.instance.machine.launchEmulator(compilationResult.programName)
                 }
             }
         }

compiler/src/prog8/ast/processing/ImportedModuleDirectiveRemover.kt

@@ -1,22 +0,0 @@
-package prog8.ast.processing
-
-import prog8.ast.INameScope
-import prog8.ast.Node
-import prog8.ast.statements.Directive
-
-
-internal class ImportedModuleDirectiveRemover: AstWalker() {
-    /**
-     * Most global directives don't apply for imported modules, so remove them
-     */
-
-    private val moduleLevelDirectives = listOf("%output", "%launcher", "%zeropage", "%zpreserved", "%address")
-    private val noModifications = emptyList<IAstModification>()
-
-    override fun before(directive: Directive, parent: Node): Iterable<IAstModification> {
-        if(directive.directive in moduleLevelDirectives) {
-            return listOf(IAstModification.Remove(directive, parent as INameScope))
-        }
-        return noModifications
-    }
-}

compiler/src/prog8/ast/processing/VariousCleanups.kt

@@ -1,44 +0,0 @@
-package prog8.ast.processing
-
-import prog8.ast.INameScope
-import prog8.ast.Node
-import prog8.ast.expressions.NumericLiteralValue
-import prog8.ast.expressions.TypecastExpression
-import prog8.ast.statements.AnonymousScope
-import prog8.ast.statements.NopStatement
-
-
-internal class VariousCleanups: AstWalker() {
-    private val noModifications = emptyList<IAstModification>()
-
-    override fun before(nopStatement: NopStatement, parent: Node): Iterable<IAstModification> {
-        return listOf(IAstModification.Remove(nopStatement, parent as INameScope))
-    }
-
-    override fun before(scope: AnonymousScope, parent: Node): Iterable<IAstModification> {
-        return if(parent is INameScope)
-            listOf(ScopeFlatten(scope, parent as INameScope))
-        else
-            noModifications
-    }
-
-    class ScopeFlatten(val scope: AnonymousScope, val into: INameScope) : IAstModification {
-        override fun perform() {
-            val idx = into.statements.indexOf(scope)
-            if(idx>=0) {
-                into.statements.addAll(idx+1, scope.statements)
-                into.statements.remove(scope)
-            }
-        }
-    }
-
-    override fun before(typecast: TypecastExpression, parent: Node): Iterable<IAstModification> {
-        if(typecast.expression is NumericLiteralValue) {
-            val value = (typecast.expression as NumericLiteralValue).cast(typecast.type)
-            if(value.isValid)
-                return listOf(IAstModification.ReplaceNode(typecast, value.valueOrZero(), parent))
-        }
-
-        return noModifications
-    }
-}

compiler/src/prog8/compiler/BeforeAsmGenerationAstChanger.kt

@@ -5,12 +5,13 @@ import prog8.ast.Node
 import prog8.ast.Program
 import prog8.ast.base.*
 import prog8.ast.expressions.*
-import prog8.ast.processing.AstWalker
-import prog8.ast.processing.IAstModification
 import prog8.ast.statements.*
+import prog8.ast.walk.AstWalker
+import prog8.ast.walk.IAstModification
+import prog8.compiler.target.ICompilationTarget
 
 
-internal class BeforeAsmGenerationAstChanger(val program: Program, val errors: ErrorReporter) : AstWalker() {
+internal class BeforeAsmGenerationAstChanger(val program: Program, val errors: ErrorReporter, private val compTarget: ICompilationTarget) : AstWalker() {
 
     private val noModifications = emptyList<IAstModification>()
 
@@ -37,7 +38,7 @@ internal class BeforeAsmGenerationAstChanger(val program: Program, val errors: E
         // But it can only be done if the target variable IS NOT OCCURRING AS AN OPERAND ITSELF.
         if(!assignment.isAugmentable
                 && assignment.target.identifier != null
-                && assignment.target.isInRegularRAM(program.namespace)) {
+                && compTarget.isInRegularRAM(assignment.target, program)) {
             val binExpr = assignment.value as? BinaryExpression
             if (binExpr != null && binExpr.operator !in comparisonOperators) {
                 if (binExpr.left !is BinaryExpression) {
@@ -156,7 +157,7 @@ internal class BeforeAsmGenerationAstChanger(val program: Program, val errors: E
         if(typecast.type in WordDatatypes) {
             val fcall = typecast.parent as? IFunctionCall
             if (fcall != null) {
-                val sub = fcall.target.targetStatement(program.namespace) as? Subroutine
+                val sub = fcall.target.targetStatement(program) as? Subroutine
                 if (sub != null && sub.isAsmSubroutine) {
                     return listOf(IAstModification.ReplaceNode(typecast, typecast.expression, parent))
                 }

compiler/src/prog8/compiler/Compiler.kt

@@ -1,9 +1,29 @@
 package prog8.compiler
 
+import prog8.ast.AstToSourceCode
+import prog8.ast.IBuiltinFunctions
+import prog8.ast.Program
+import prog8.ast.base.AstException
+import prog8.ast.base.Position
+import prog8.ast.expressions.Expression
+import prog8.ast.expressions.NumericLiteralValue
+import prog8.ast.statements.Directive
+import prog8.compiler.astprocessing.*
+import prog8.compiler.functions.*
+import prog8.compiler.target.C64Target
+import prog8.compiler.target.Cx16Target
+import prog8.compiler.target.ICompilationTarget
+import prog8.compiler.target.asmGeneratorFor
+import prog8.optimizer.*
+import prog8.parser.ModuleImporter
+import prog8.parser.ParsingFailedError
+import prog8.parser.moduleName
 import java.io.File
 import java.io.InputStream
 import java.nio.file.Path
-import kotlin.math.abs
+import kotlin.system.exitProcess
+import kotlin.system.measureTimeMillis
+
 
 enum class OutputType {
     RAW,
@@ -36,20 +56,263 @@ data class CompilationOptions(val output: OutputType,
 
 class CompilerException(message: String?) : Exception(message)
 
-fun Number.toHex(): String {
+class CompilationResult(val success: Boolean,
-    //  0..15 -> "0".."15"
+                        val programAst: Program,
-    //  16..255 -> "$10".."$ff"
+                        val programName: String,
-    //  256..65536 -> "$0100".."$ffff"
+                        val importedFiles: List<Path>)
-    // negative values are prefixed with '-'.
+
-    val integer = this.toInt()
+
-    if(integer<0)
+fun compileProgram(filepath: Path,
-        return '-' + abs(integer).toHex()
+                   optimize: Boolean,
-    return when (integer) {
+                   writeAssembly: Boolean,
-        in 0 until 16 -> integer.toString()
+                   slowCodegenWarnings: Boolean,
-        in 0 until 0x100 -> "$"+integer.toString(16).padStart(2,'0')
+                   compilationTarget: String,
-        in 0 until 0x10000 -> "$"+integer.toString(16).padStart(4,'0')
+                   outputDir: Path): CompilationResult {
-        else -> throw CompilerException("number too large for 16 bits $this")
+    var programName = ""
+    lateinit var programAst: Program
+    lateinit var importedFiles: List<Path>
+    val errors = ErrorReporter()
+
+    when(compilationTarget) {
+        C64Target.name -> ICompilationTarget.instance = C64Target
+        Cx16Target.name -> ICompilationTarget.instance = Cx16Target
+        else -> {
+            System.err.println("invalid compilation target")
+            exitProcess(1)
         }
+    }
+
+    try {
+        val totalTime = measureTimeMillis {
+            // import main module and everything it needs
+            val (ast, compilationOptions, imported) = parseImports(filepath, errors)
+            compilationOptions.slowCodegenWarnings = slowCodegenWarnings
+            compilationOptions.optimize = optimize
+            programAst = ast
+            importedFiles = imported
+            processAst(programAst, errors, compilationOptions, ICompilationTarget.instance)
+            if (compilationOptions.optimize)
+                optimizeAst(programAst, errors, BuiltinFunctionsFacade(BuiltinFunctions))
+            postprocessAst(programAst, errors, compilationOptions, ICompilationTarget.instance)
+
+            // printAst(programAst)
+
+            if(writeAssembly)
+                programName = writeAssembly(programAst, errors, outputDir, compilationOptions)
+        }
+        System.out.flush()
+        System.err.flush()
+        println("\nTotal compilation+assemble time: ${totalTime / 1000.0} sec.")
+        return CompilationResult(true, programAst, programName, importedFiles)
+
+    } catch (px: ParsingFailedError) {
+        System.err.print("\u001b[91m")  // bright red
+        System.err.println(px.message)
+        System.err.print("\u001b[0m")  // reset
+    } catch (ax: AstException) {
+        System.err.print("\u001b[91m")  // bright red
+        System.err.println(ax.toString())
+        System.err.print("\u001b[0m")  // reset
+    } catch (x: Exception) {
+        print("\u001b[91m")  // bright red
+        println("\n* internal error *")
+        print("\u001b[0m")  // reset
+        System.out.flush()
+        throw x
+    } catch (x: NotImplementedError) {
+        print("\u001b[91m")  // bright red
+        println("\n* internal error: missing feature/code *")
+        print("\u001b[0m")  // reset
+        System.out.flush()
+        throw x
+    }
+
+    val failedProgram = Program("failed", mutableListOf(), BuiltinFunctionsFacade(BuiltinFunctions))
+    return CompilationResult(false, failedProgram, programName, emptyList())
+}
+
+private class BuiltinFunctionsFacade(functions: Map<String, FSignature>): IBuiltinFunctions {
+    lateinit var program: Program
+
+    override val names = functions.keys
+    override val purefunctionNames = functions.filter { it.value.pure }.map { it.key }.toSet()
+
+    override fun constValue(name: String, args: List<Expression>, position: Position): NumericLiteralValue? {
+        val func = BuiltinFunctions[name]
+        if(func!=null) {
+            val exprfunc = func.constExpressionFunc
+            if(exprfunc!=null) {
+                return try {
+                    exprfunc(args, position, program)
+                } catch(x: NotConstArgumentException) {
+                    // const-evaluating the builtin function call failed.
+                    null
+                } catch(x: CannotEvaluateException) {
+                    // const-evaluating the builtin function call failed.
+                    null
+                }
+            }
+            else if(func.known_returntype==null)
+                throw IllegalArgumentException("builtin function $name can't be used here because it doesn't return a value")
+        }
+        return null
+    }
+    override fun returnType(name: String, args: MutableList<Expression>) =
+        builtinFunctionReturnType(name, args, program)
+}
+
+private fun parseImports(filepath: Path, errors: ErrorReporter): Triple<Program, CompilationOptions, List<Path>> {
+    val compilationTargetName = ICompilationTarget.instance.name
+    println("Compiler target: $compilationTargetName. Parsing...")
+    val importer = ModuleImporter()
+    val bf = BuiltinFunctionsFacade(BuiltinFunctions)
+    val programAst = Program(moduleName(filepath.fileName), mutableListOf(), bf)
+    bf.program = programAst
+    importer.importModule(programAst, filepath, ICompilationTarget.instance, compilationTargetName)
+    errors.handle()
+
+    val importedFiles = programAst.modules.filter { !it.source.startsWith("@embedded@") }.map { it.source }
+
+    val compilerOptions = determineCompilationOptions(programAst)
+    if (compilerOptions.launcher == LauncherType.BASIC && compilerOptions.output != OutputType.PRG)
+        throw ParsingFailedError("${programAst.modules.first().position} BASIC launcher requires output type PRG.")
+
+    // depending on the machine and compiler options we may have to include some libraries
+    ICompilationTarget.instance.machine.importLibs(compilerOptions, importer, programAst, ICompilationTarget.instance, compilationTargetName)
+
+    // always import prog8_lib and math
+    importer.importLibraryModule(programAst, "math", ICompilationTarget.instance, compilationTargetName)
+    importer.importLibraryModule(programAst, "prog8_lib", ICompilationTarget.instance, compilationTargetName)
+    errors.handle()
+    return Triple(programAst, compilerOptions, importedFiles)
+}
+
+private fun determineCompilationOptions(program: Program): CompilationOptions {
+    val mainModule = program.modules.first()
+    val outputType = (mainModule.statements.singleOrNull { it is Directive && it.directive == "%output" }
+            as? Directive)?.args?.single()?.name?.toUpperCase()
+    val launcherType = (mainModule.statements.singleOrNull { it is Directive && it.directive == "%launcher" }
+            as? Directive)?.args?.single()?.name?.toUpperCase()
+    val zpoption: String? = (mainModule.statements.singleOrNull { it is Directive && it.directive == "%zeropage" }
+            as? Directive)?.args?.single()?.name?.toUpperCase()
+    val allOptions = program.modules.flatMap { it.statements }.filter { it is Directive && it.directive == "%option" }.flatMap { (it as Directive).args }.toSet()
+    val floatsEnabled = allOptions.any { it.name == "enable_floats" }
+    val noSysInit = allOptions.any { it.name == "no_sysinit" }
+    var zpType: ZeropageType =
+            if (zpoption == null)
+                if(floatsEnabled) ZeropageType.FLOATSAFE else ZeropageType.KERNALSAFE
+            else
+                try {
+                    ZeropageType.valueOf(zpoption)
+                } catch (x: IllegalArgumentException) {
+                    ZeropageType.KERNALSAFE
+                    // error will be printed by the astchecker
+                }
+
+    if (zpType==ZeropageType.FLOATSAFE && ICompilationTarget.instance.name == Cx16Target.name) {
+        System.err.println("Warning: Cx16 target must use zp option basicsafe instead of floatsafe")
+        zpType = ZeropageType.BASICSAFE
+    }
+
+    val zpReserved = mainModule.statements
+            .asSequence()
+            .filter { it is Directive && it.directive == "%zpreserved" }
+            .map { (it as Directive).args }
+            .map { it[0].int!!..it[1].int!! }
+            .toList()
+
+    if(outputType!=null && !OutputType.values().any {it.name==outputType}) {
+        System.err.println("invalid output type $outputType")
+        exitProcess(1)
+    }
+    if(launcherType!=null && !LauncherType.values().any {it.name==launcherType}) {
+        System.err.println("invalid launcher type $launcherType")
+        exitProcess(1)
+    }
+
+    return CompilationOptions(
+            if (outputType == null) OutputType.PRG else OutputType.valueOf(outputType),
+            if (launcherType == null) LauncherType.BASIC else LauncherType.valueOf(launcherType),
+            zpType, zpReserved, floatsEnabled, noSysInit
+    )
+}
+
+private fun processAst(programAst: Program, errors: ErrorReporter, compilerOptions: CompilationOptions, compTarget: ICompilationTarget) {
+    // perform initial syntax checks and processings
+    println("Processing for target ${compTarget.name}...")
+    programAst.checkIdentifiers(errors, compTarget)
+    errors.handle()
+    programAst.constantFold(errors)
+    errors.handle()
+    programAst.reorderStatements(errors)
+    errors.handle()
+    programAst.addTypecasts(errors)
+    errors.handle()
+    programAst.variousCleanups()
+    programAst.checkValid(compilerOptions, errors, compTarget)
+    errors.handle()
+    programAst.checkIdentifiers(errors, compTarget)
+    errors.handle()
+}
+
+private fun optimizeAst(programAst: Program, errors: ErrorReporter, functions: IBuiltinFunctions) {
+    // optimize the parse tree
+    println("Optimizing...")
+    while (true) {
+        // keep optimizing expressions and statements until no more steps remain
+        val optsDone1 = programAst.simplifyExpressions()
+        val optsDone2 = programAst.splitBinaryExpressions()
+        val optsDone3 = programAst.optimizeStatements(errors, functions)
+        programAst.constantFold(errors) // because simplified statements and expressions can result in more constants that can be folded away
+        errors.handle()
+        if (optsDone1 + optsDone2 + optsDone3 == 0)
+            break
+    }
+
+    val remover = UnusedCodeRemover(programAst, errors)
+    remover.visit(programAst)
+    remover.applyModifications()
+    errors.handle()
+}
+
+private fun postprocessAst(programAst: Program, errors: ErrorReporter, compilerOptions: CompilationOptions, compTarget: ICompilationTarget) {
+    programAst.addTypecasts(errors)
+    errors.handle()
+    programAst.variousCleanups()
+    programAst.checkValid(compilerOptions, errors, compTarget)          // check if final tree is still valid
+    errors.handle()
+    val callGraph = CallGraph(programAst)
+    callGraph.checkRecursiveCalls(errors)
+    errors.handle()
+    programAst.verifyFunctionArgTypes()
+    programAst.moveMainAndStartToFirst()
+}
+
+private fun writeAssembly(programAst: Program, errors: ErrorReporter, outputDir: Path,
+                          compilerOptions: CompilationOptions): String {
+    // asm generation directly from the Ast,
+    programAst.processAstBeforeAsmGeneration(errors, ICompilationTarget.instance)
+    errors.handle()
+
+    // printAst(programAst)
+
+    ICompilationTarget.instance.machine.initializeZeropage(compilerOptions)
+    val assembly = asmGeneratorFor(ICompilationTarget.instance,
+            programAst,
+            errors,
+            ICompilationTarget.instance.machine.zeropage,
+            compilerOptions,
+            outputDir).compileToAssembly()
+    assembly.assemble(compilerOptions)
+    errors.handle()
+    return assembly.name
+}
+
+fun printAst(programAst: Program) {
+    println()
+    val printer = AstToSourceCode(::print, programAst)
+    printer.visit(programAst)
+    println()
 }
 
 fun loadAsmIncludeFile(filename: String, source: Path): String {

compiler/src/prog8/compiler/ErrorReporting.kt

@@ -1,8 +1,8 @@
-package prog8.ast.base
+package prog8.compiler
 
+import prog8.ast.base.Position
 import prog8.parser.ParsingFailedError
 
-
 class ErrorReporter {
     private enum class MessageSeverity {
         WARNING,

compiler/src/prog8/compiler/Main.kt

@@ -1,247 +0,0 @@
-package prog8.compiler
-
-import prog8.ast.AstToSourceCode
-import prog8.ast.Program
-import prog8.ast.base.*
-import prog8.ast.statements.Directive
-import prog8.compiler.target.C64Target
-import prog8.compiler.target.CompilationTarget
-import prog8.compiler.target.Cx16Target
-import prog8.optimizer.*
-import prog8.optimizer.UnusedCodeRemover
-import prog8.optimizer.constantFold
-import prog8.optimizer.optimizeStatements
-import prog8.optimizer.simplifyExpressions
-import prog8.parser.ModuleImporter
-import prog8.parser.ParsingFailedError
-import prog8.parser.moduleName
-import java.nio.file.Path
-import kotlin.system.exitProcess
-import kotlin.system.measureTimeMillis
-
-
-class CompilationResult(val success: Boolean,
-                        val programAst: Program,
-                        val programName: String,
-                        val importedFiles: List<Path>)
-
-
-fun compileProgram(filepath: Path,
-                   optimize: Boolean,
-                   writeAssembly: Boolean,
-                   slowCodegenWarnings: Boolean,
-                   compilationTarget: String,
-                   outputDir: Path): CompilationResult {
-    var programName = ""
-    lateinit var programAst: Program
-    lateinit var importedFiles: List<Path>
-    val errors = ErrorReporter()
-
-    when(compilationTarget) {
-        C64Target.name -> CompilationTarget.instance = C64Target
-        Cx16Target.name -> CompilationTarget.instance = Cx16Target
-        else -> {
-            System.err.println("invalid compilation target")
-            exitProcess(1)
-        }
-    }
-
-    try {
-        val totalTime = measureTimeMillis {
-            // import main module and everything it needs
-            val (ast, compilationOptions, imported) = parseImports(filepath, errors)
-            compilationOptions.slowCodegenWarnings = slowCodegenWarnings
-            compilationOptions.optimize = optimize
-            programAst = ast
-            importedFiles = imported
-            processAst(programAst, errors, compilationOptions)
-            if (compilationOptions.optimize)
-                optimizeAst(programAst, errors)
-            postprocessAst(programAst, errors, compilationOptions)
-
-            // printAst(programAst)
-
-            if(writeAssembly)
-                programName = writeAssembly(programAst, errors, outputDir, compilationOptions)
-        }
-        System.out.flush()
-        System.err.flush()
-        println("\nTotal compilation+assemble time: ${totalTime / 1000.0} sec.")
-        return CompilationResult(true, programAst, programName, importedFiles)
-
-    } catch (px: ParsingFailedError) {
-        System.err.print("\u001b[91m")  // bright red
-        System.err.println(px.message)
-        System.err.print("\u001b[0m")  // reset
-    } catch (ax: AstException) {
-        System.err.print("\u001b[91m")  // bright red
-        System.err.println(ax.toString())
-        System.err.print("\u001b[0m")  // reset
-    } catch (x: Exception) {
-        print("\u001b[91m")  // bright red
-        println("\n* internal error *")
-        print("\u001b[0m")  // reset
-        System.out.flush()
-        throw x
-    } catch (x: NotImplementedError) {
-        print("\u001b[91m")  // bright red
-        println("\n* internal error: missing feature/code *")
-        print("\u001b[0m")  // reset
-        System.out.flush()
-        throw x
-    }
-
-    return CompilationResult(false, Program("failed", mutableListOf()), programName, emptyList())
-}
-
-private fun parseImports(filepath: Path, errors: ErrorReporter): Triple<Program, CompilationOptions, List<Path>> {
-    println("Compiler target: ${CompilationTarget.instance.name}. Parsing...")
-    val importer = ModuleImporter()
-    val programAst = Program(moduleName(filepath.fileName), mutableListOf())
-    importer.importModule(programAst, filepath)
-    errors.handle()
-
-    val importedFiles = programAst.modules.filter { !it.source.startsWith("@embedded@") }.map { it.source }
-
-    val compilerOptions = determineCompilationOptions(programAst)
-    if (compilerOptions.launcher == LauncherType.BASIC && compilerOptions.output != OutputType.PRG)
-        throw ParsingFailedError("${programAst.modules.first().position} BASIC launcher requires output type PRG.")
-
-    // depending on the machine and compiler options we may have to include some libraries
-    CompilationTarget.instance.machine.importLibs(compilerOptions, importer, programAst)
-
-    // always import prog8_lib and math
-    importer.importLibraryModule(programAst, "math")
-    importer.importLibraryModule(programAst, "prog8_lib")
-    errors.handle()
-    return Triple(programAst, compilerOptions, importedFiles)
-}
-
-private fun determineCompilationOptions(program: Program): CompilationOptions {
-    val mainModule = program.modules.first()
-    val outputType = (mainModule.statements.singleOrNull { it is Directive && it.directive == "%output" }
-            as? Directive)?.args?.single()?.name?.toUpperCase()
-    val launcherType = (mainModule.statements.singleOrNull { it is Directive && it.directive == "%launcher" }
-            as? Directive)?.args?.single()?.name?.toUpperCase()
-    val zpoption: String? = (mainModule.statements.singleOrNull { it is Directive && it.directive == "%zeropage" }
-            as? Directive)?.args?.single()?.name?.toUpperCase()
-    val allOptions = program.modules.flatMap { it.statements }.filter { it is Directive && it.directive == "%option" }.flatMap { (it as Directive).args }.toSet()
-    val floatsEnabled = allOptions.any { it.name == "enable_floats" }
-    val noSysInit = allOptions.any { it.name == "no_sysinit" }
-    var zpType: ZeropageType =
-            if (zpoption == null)
-                if(floatsEnabled) ZeropageType.FLOATSAFE else ZeropageType.KERNALSAFE
-            else
-                try {
-                    ZeropageType.valueOf(zpoption)
-                } catch (x: IllegalArgumentException) {
-                    ZeropageType.KERNALSAFE
-                    // error will be printed by the astchecker
-                }
-
-    if (zpType==ZeropageType.FLOATSAFE && CompilationTarget.instance.name == Cx16Target.name) {
-        System.err.println("Warning: Cx16 target must use zp option basicsafe instead of floatsafe")
-        zpType = ZeropageType.BASICSAFE
-    }
-
-    val zpReserved = mainModule.statements
-            .asSequence()
-            .filter { it is Directive && it.directive == "%zpreserved" }
-            .map { (it as Directive).args }
-            .map { it[0].int!!..it[1].int!! }
-            .toList()
-
-    if(outputType!=null && !OutputType.values().any {it.name==outputType}) {
-        System.err.println("invalid output type $outputType")
-        exitProcess(1)
-    }
-    if(launcherType!=null && !LauncherType.values().any {it.name==launcherType}) {
-        System.err.println("invalid launcher type $launcherType")
-        exitProcess(1)
-    }
-
-    return CompilationOptions(
-            if (outputType == null) OutputType.PRG else OutputType.valueOf(outputType),
-            if (launcherType == null) LauncherType.BASIC else LauncherType.valueOf(launcherType),
-            zpType, zpReserved, floatsEnabled, noSysInit
-    )
-}
-
-private fun processAst(programAst: Program, errors: ErrorReporter, compilerOptions: CompilationOptions) {
-    // perform initial syntax checks and processings
-    println("Processing for target ${CompilationTarget.instance.name}...")
-    programAst.checkIdentifiers(errors)
-    errors.handle()
-    programAst.constantFold(errors)
-    errors.handle()
-    programAst.reorderStatements(errors)
-    errors.handle()
-    programAst.addTypecasts(errors)
-    errors.handle()
-    programAst.variousCleanups()
-    programAst.checkValid(compilerOptions, errors)
-    errors.handle()
-    programAst.checkIdentifiers(errors)
-    errors.handle()
-}
-
-private fun optimizeAst(programAst: Program, errors: ErrorReporter) {
-    // optimize the parse tree
-    println("Optimizing...")
-    while (true) {
-        // keep optimizing expressions and statements until no more steps remain
-        val optsDone1 = programAst.simplifyExpressions()
-        val optsDone2 = programAst.splitBinaryExpressions()
-        val optsDone3 = programAst.optimizeStatements(errors)
-        programAst.constantFold(errors) // because simplified statements and expressions can result in more constants that can be folded away
-        errors.handle()
-        if (optsDone1 + optsDone2 + optsDone3 == 0)
-            break
-    }
-
-    val remover = UnusedCodeRemover(programAst, errors)
-    remover.visit(programAst)
-    remover.applyModifications()
-    errors.handle()
-}
-
-private fun postprocessAst(programAst: Program, errors: ErrorReporter, compilerOptions: CompilationOptions) {
-    programAst.addTypecasts(errors)
-    errors.handle()
-    programAst.variousCleanups()
-    programAst.checkValid(compilerOptions, errors)          // check if final tree is still valid
-    errors.handle()
-    val callGraph = CallGraph(programAst)
-    callGraph.checkRecursiveCalls(errors)
-    errors.handle()
-    programAst.verifyFunctionArgTypes()
-    programAst.moveMainAndStartToFirst()
-}
-
-private fun writeAssembly(programAst: Program, errors: ErrorReporter, outputDir: Path,
-                          compilerOptions: CompilationOptions): String {
-    // asm generation directly from the Ast,
-    programAst.processAstBeforeAsmGeneration(errors)
-    errors.handle()
-
-    // printAst(programAst)
-
-    CompilationTarget.instance.machine.initializeZeropage(compilerOptions)
-    val assembly = CompilationTarget.instance.asmGenerator(
-            programAst,
-            errors,
-            CompilationTarget.instance.machine.zeropage,
-            compilerOptions,
-            outputDir).compileToAssembly()
-    assembly.assemble(compilerOptions)
-    errors.handle()
-    return assembly.name
-}
-
-fun printAst(programAst: Program) {
-    println()
-    val printer = AstToSourceCode(::print, programAst)
-    printer.visit(programAst)
-    println()
-}
-

compiler/src/prog8/compiler/astprocessing/AstChecker.kt

@@ -1,4 +1,4 @@
-package prog8.ast.processing
+package prog8.compiler.astprocessing
 
 import prog8.ast.INameScope
 import prog8.ast.Module
@@ -6,17 +6,21 @@ import prog8.ast.Program
 import prog8.ast.base.*
 import prog8.ast.expressions.*
 import prog8.ast.statements.*
+import prog8.ast.walk.IAstVisitor
 import prog8.compiler.CompilationOptions
+import prog8.compiler.ErrorReporter
+import prog8.compiler.functions.BuiltinFunctions
+import prog8.compiler.functions.builtinFunctionReturnType
 import prog8.compiler.target.C64Target
-import prog8.compiler.target.CompilationTarget
 import prog8.compiler.target.Cx16Target
-import prog8.functions.BuiltinFunctions
+import prog8.compiler.target.ICompilationTarget
-import prog8.functions.builtinFunctionReturnType
 import java.io.File
 
 internal class AstChecker(private val program: Program,
                           private val compilerOptions: CompilationOptions,
-                          private val errors: ErrorReporter) : IAstVisitor {
+                          private val errors: ErrorReporter,
+                          private val compTarget: ICompilationTarget
+) : IAstVisitor {
 
     override fun visit(program: Program) {
         assert(program === this.program)
@@ -99,7 +103,7 @@ internal class AstChecker(private val program: Program,
         if(iterableDt !in IterableDatatypes && forLoop.iterable !is RangeExpr) {
             errors.err("can only loop over an iterable type", forLoop.position)
         } else {
-            val loopvar = forLoop.loopVar.targetVarDecl(program.namespace)
+            val loopvar = forLoop.loopVar.targetVarDecl(program)
             if(loopvar==null || loopvar.type== VarDeclType.CONST) {
                 errors.err("for loop requires a variable to loop with", forLoop.position)
             } else {
@@ -150,21 +154,24 @@ internal class AstChecker(private val program: Program,
     }
 
     override fun visit(jump: Jump) {
-        if(jump.identifier!=null) {
+        val ident = jump.identifier
-            val targetStatement = checkFunctionOrLabelExists(jump.identifier, jump)
+        if(ident!=null) {
+            val targetStatement = checkFunctionOrLabelExists(ident, jump)
             if(targetStatement!=null) {
                 if(targetStatement is BuiltinFunctionStatementPlaceholder)
                     errors.err("can't jump to a builtin function", jump.position)
             }
         }
 
-        if(jump.address!=null && (jump.address < 0 || jump.address > 65535))
+        val addr = jump.address
+        if(addr!=null && (addr < 0 || addr > 65535))
             errors.err("jump address must be valid integer 0..\$ffff", jump.position)
         super.visit(jump)
     }
 
     override fun visit(block: Block) {
-        if(block.address!=null && (block.address<0 || block.address>65535)) {
+        val addr = block.address
+        if(addr!=null && (addr<0 || addr>65535)) {
             errors.err("block memory address must be valid integer 0..\$ffff", block.position)
         }
 
@@ -315,9 +322,11 @@ internal class AstChecker(private val program: Program,
                         RegisterOrPair.R13,
                         RegisterOrPair.R14,
                         RegisterOrPair.R15 -> { /* no sensible way to count this */ }
-                        null ->
+                        null -> {
-                            if(p.statusflag!=null)
+                            val statusf = p.statusflag
-                                statusflagCounts[p.statusflag] = statusflagCounts.getValue(p.statusflag) + 1
+                            if (statusf != null)
+                                statusflagCounts[statusf] = statusflagCounts.getValue(statusf) + 1
+                        }
                     }
                 }
             }
@@ -376,7 +385,7 @@ internal class AstChecker(private val program: Program,
 
     override fun visit(assignment: Assignment) {
         if(assignment.value is FunctionCall) {
-            val stmt = (assignment.value as FunctionCall).target.targetStatement(program.namespace)
+            val stmt = (assignment.value as FunctionCall).target.targetStatement(program)
             if (stmt is Subroutine) {
                 val idt = assignment.target.inferType(program)
                 if(!idt.isKnown) {
@@ -390,7 +399,7 @@ internal class AstChecker(private val program: Program,
 
         val targetIdent = assignment.target.identifier
         if(targetIdent!=null) {
-            val targetVar = targetIdent.targetVarDecl(program.namespace)
+            val targetVar = targetIdent.targetVarDecl(program)
             if(targetVar?.struct != null) {
                 val sourceStructLv = assignment.value as? ArrayLiteralValue
                 if (sourceStructLv != null) {
@@ -399,7 +408,7 @@ internal class AstChecker(private val program: Program,
                 } else {
                     val sourceIdent = assignment.value as? IdentifierReference
                     if (sourceIdent != null) {
-                        val sourceVar = sourceIdent.targetVarDecl(program.namespace)
+                        val sourceVar = sourceIdent.targetVarDecl(program)
                         if (sourceVar?.struct != null) {
                             if (sourceVar.struct !== targetVar.struct)
                                 errors.err("assignment of different struct types", assignment.position)
@@ -487,7 +496,7 @@ internal class AstChecker(private val program: Program,
     }
 
     override fun visit(addressOf: AddressOf) {
-        val variable=addressOf.identifier.targetVarDecl(program.namespace)
+        val variable=addressOf.identifier.targetVarDecl(program)
         if(variable!=null
             && variable.datatype !in ArrayDatatypes
             && variable.type!=VarDeclType.MEMORY
@@ -782,7 +791,7 @@ internal class AstChecker(private val program: Program,
 
         fun isPassByReferenceElement(e: Expression): Boolean {
             if(e is IdentifierReference) {
-                val decl = e.targetVarDecl(program.namespace)!!
+                val decl = e.targetVarDecl(program)!!
                 return decl.datatype in PassByReferenceDatatypes
             }
             return e is StringLiteralValue
@@ -790,7 +799,7 @@ internal class AstChecker(private val program: Program,
 
         if(array.parent is VarDecl) {
             if (!array.value.all { it is NumericLiteralValue || it is AddressOf || isPassByReferenceElement(it) })
-                errors.err("array literal for variable initialization contains invalid types", array.position)
+                errors.err("array literal for variable initialization contains non-constant elements", array.position)
         } else if(array.parent is ForLoop) {
             if (!array.value.all { it.constValue(program) != null })
                 errors.err("array literal for iteration must contain constants. Try using a separate array variable instead?", array.position)
@@ -935,12 +944,12 @@ internal class AstChecker(private val program: Program,
                 errors.warn("sgn() of unsigned type is always 0 or 1, this is perhaps not what was intended", functionCall.args.first().position)
         }
 
-        val error = VerifyFunctionArgTypes.checkTypes(functionCall, functionCall.definingScope(), program)
+        val error = VerifyFunctionArgTypes.checkTypes(functionCall, program)
         if(error!=null)
             errors.err(error, functionCall.position)
 
         // check the functions that return multiple returnvalues.
-        val stmt = functionCall.target.targetStatement(program.namespace)
+        val stmt = functionCall.target.targetStatement(program)
         if (stmt is Subroutine) {
             if (stmt.returntypes.size > 1) {
                 // Currently, it's only possible to handle ONE (or zero) return values from a subroutine.
@@ -998,7 +1007,8 @@ internal class AstChecker(private val program: Program,
             }
         }
 
-        val error = VerifyFunctionArgTypes.checkTypes(functionCallStatement, functionCallStatement.definingScope(), program)
+        val error =
+            VerifyFunctionArgTypes.checkTypes(functionCallStatement, program)
         if(error!=null) {
             errors.err(error, functionCallStatement.args.firstOrNull()?.position ?: functionCallStatement.position)
         }
@@ -1025,7 +1035,7 @@ internal class AstChecker(private val program: Program,
                     errors.err("swap requires args of numerical type", position)
             }
             else if(target.name=="all" || target.name=="any") {
-                if((args[0] as? AddressOf)?.identifier?.targetVarDecl(program.namespace)?.datatype == DataType.STR) {
+                if((args[0] as? AddressOf)?.identifier?.targetVarDecl(program)?.datatype == DataType.STR) {
                     errors.err("any/all on a string is useless (is always true unless the string is empty)", position)
                 }
                 if(args[0].inferType(program).typeOrElse(DataType.STR) == DataType.STR) {
@@ -1039,6 +1049,28 @@ internal class AstChecker(private val program: Program,
                     if (!argIDt.isKnown)
                         return
                 }
+
+                // check that cx16 virtual registers aren't used as arguments in a conflicting way
+                val params = target.asmParameterRegisters.withIndex().toList()
+                for(arg in args.withIndex()) {
+                    var ident: IdentifierReference? = null
+                    if(arg.value is IdentifierReference)
+                        ident = arg.value as IdentifierReference
+                    else if(arg.value is FunctionCall) {
+                        val fcall = arg.value as FunctionCall
+                        if(fcall.target.nameInSource == listOf("lsb") || fcall.target.nameInSource == listOf("msb"))
+                            ident = fcall.args[0] as? IdentifierReference
+                    }
+                    if(ident!=null && ident.nameInSource[0] == "cx16" && ident.nameInSource[1].startsWith("r")) {
+                        val reg = RegisterOrPair.valueOf(ident.nameInSource[1].toUpperCase())
+                        val same = params.filter { it.value.registerOrPair==reg }
+                        for(s in same) {
+                            if(s.index!=arg.index) {
+                                errors.err("conflicting register $reg used as argument but is also a target register for another parameter", ident.position)
+                            }
+                        }
+                    }
+                }
             }
         }
     }
@@ -1058,7 +1090,7 @@ internal class AstChecker(private val program: Program,
                 }
             }
         } else if(postIncrDecr.target.arrayindexed != null) {
-            val target = postIncrDecr.target.arrayindexed?.arrayvar?.targetStatement(program.namespace)
+            val target = postIncrDecr.target.arrayindexed?.arrayvar?.targetStatement(program)
             if(target==null) {
                 errors.err("undefined symbol", postIncrDecr.position)
             }
@@ -1073,7 +1105,7 @@ internal class AstChecker(private val program: Program,
     }
 
     override fun visit(arrayIndexedExpression: ArrayIndexedExpression) {
-        val target = arrayIndexedExpression.arrayvar.targetStatement(program.namespace)
+        val target = arrayIndexedExpression.arrayvar.targetStatement(program)
         if(target is VarDecl) {
             if(target.datatype !in IterableDatatypes)
                 errors.err("indexing requires an iterable variable", arrayIndexedExpression.position)
@@ -1165,7 +1197,7 @@ internal class AstChecker(private val program: Program,
     }
 
     private fun checkFunctionOrLabelExists(target: IdentifierReference, statement: Statement): Statement? {
-        val targetStatement = target.targetStatement(program.namespace)
+        val targetStatement = target.targetStatement(program)
         if(targetStatement is Label || targetStatement is Subroutine || targetStatement is BuiltinFunctionStatementPlaceholder)
             return targetStatement
         else if(targetStatement==null)
@@ -1255,7 +1287,7 @@ internal class AstChecker(private val program: Program,
 
                     // check if the floating point values are all within range
                     val doubles = value.value.map {it.constValue(program)?.number!!.toDouble()}.toDoubleArray()
-                    if(doubles.any { it < CompilationTarget.instance.machine.FLOAT_MAX_NEGATIVE || it > CompilationTarget.instance.machine.FLOAT_MAX_POSITIVE })
+                    if(doubles.any { it < compTarget.machine.FLOAT_MAX_NEGATIVE || it > compTarget.machine.FLOAT_MAX_POSITIVE })
                         return err("floating point value overflow")
                     return true
                 }
@@ -1383,7 +1415,7 @@ internal class AstChecker(private val program: Program,
                 if(sourceDatatype==DataType.STRUCT) {
                     val structLv = sourceValue as ArrayLiteralValue
                     val numValues = structLv.value.size
-                    val targetstruct = target.identifier!!.targetVarDecl(program.namespace)!!.struct!!
+                    val targetstruct = target.identifier!!.targetVarDecl(program)!!.struct!!
                     return targetstruct.numberOfElements == numValues
                 }
                 false

compiler/src/prog8/compiler/astprocessing/AstExtensions.kt

@@ -1,20 +1,21 @@
-package prog8.ast.base
+package prog8.compiler.astprocessing
 
-import prog8.ast.Module
 import prog8.ast.Program
-import prog8.ast.processing.*
+import prog8.compiler.ErrorReporter
+import prog8.ast.base.FatalAstException
 import prog8.ast.statements.Directive
-import prog8.compiler.CompilationOptions
 import prog8.compiler.BeforeAsmGenerationAstChanger
+import prog8.compiler.CompilationOptions
+import prog8.compiler.target.ICompilationTarget
 
 
-internal fun Program.checkValid(compilerOptions: CompilationOptions, errors: ErrorReporter) {
+internal fun Program.checkValid(compilerOptions: CompilationOptions, errors: ErrorReporter, compTarget: ICompilationTarget) {
-    val checker = AstChecker(this, compilerOptions, errors)
+    val checker = AstChecker(this, compilerOptions, errors, compTarget)
     checker.visit(this)
 }
 
-internal fun Program.processAstBeforeAsmGeneration(errors: ErrorReporter) {
+internal fun Program.processAstBeforeAsmGeneration(errors: ErrorReporter, compTarget: ICompilationTarget) {
-    val fixer = BeforeAsmGenerationAstChanger(this, errors)
+    val fixer = BeforeAsmGenerationAstChanger(this, errors, compTarget)
     fixer.visit(this)
     fixer.applyModifications()
 }
@@ -36,15 +37,9 @@ internal fun Program.verifyFunctionArgTypes() {
     fixer.visit(this)
 }
 
-internal fun Module.checkImportedValid() {
+internal fun Program.checkIdentifiers(errors: ErrorReporter, compTarget: ICompilationTarget) {
-    val imr = ImportedModuleDirectiveRemover()
-    imr.visit(this, this.parent)
-    imr.applyModifications()
-}
 
-internal fun Program.checkIdentifiers(errors: ErrorReporter) {
+    val checker2 = AstIdentifiersChecker(this, errors, compTarget)
-
-    val checker2 = AstIdentifiersChecker(this, errors)
     checker2.visit(this)
 
     if(errors.isEmpty()) {

compiler/src/prog8/compiler/astprocessing/AstIdentifiersChecker.kt

@@ -1,14 +1,20 @@
-package prog8.ast.processing
+package prog8.compiler.astprocessing
 
 import prog8.ast.Module
 import prog8.ast.Program
-import prog8.ast.base.*
+import prog8.ast.base.DataType
-import prog8.ast.expressions.*
+import prog8.compiler.ErrorReporter
+import prog8.ast.base.NumericDatatypes
+import prog8.ast.base.Position
+import prog8.ast.expressions.ArrayLiteralValue
+import prog8.ast.expressions.NumericLiteralValue
+import prog8.ast.expressions.StringLiteralValue
 import prog8.ast.statements.*
-import prog8.compiler.target.CompilationTarget
+import prog8.ast.walk.IAstVisitor
-import prog8.functions.BuiltinFunctions
+import prog8.compiler.functions.BuiltinFunctions
+import prog8.compiler.target.ICompilationTarget
 
-internal class AstIdentifiersChecker(private val program: Program, private val errors: ErrorReporter) : IAstVisitor {
+internal class AstIdentifiersChecker(private val program: Program, private val errors: ErrorReporter, private val compTarget: ICompilationTarget) : IAstVisitor {
     private var blocks = mutableMapOf<String, Block>()
 
     private fun nameError(name: String, position: Position, existing: Statement) {
@@ -22,7 +28,7 @@ internal class AstIdentifiersChecker(private val program: Program, private val e
     }
 
     override fun visit(block: Block) {
-        if(block.name in CompilationTarget.instance.machine.opcodeNames)
+        if(block.name in compTarget.machine.opcodeNames)
             errors.err("can't use a cpu opcode name as a symbol: '${block.name}'", block.position)
 
         val existing = blocks[block.name]
@@ -44,8 +50,8 @@ internal class AstIdentifiersChecker(private val program: Program, private val e
     override fun visit(directive: Directive) {
         if(directive.directive=="%target") {
             val compatibleTarget = directive.args.single().name
-            if (compatibleTarget != CompilationTarget.instance.name)
+            if (compatibleTarget != compTarget.name)
-                errors.err("module's compilation target ($compatibleTarget) differs from active target (${CompilationTarget.instance.name})", directive.position)
+                errors.err("module's compilation target ($compatibleTarget) differs from active target (${compTarget.name})", directive.position)
         }
 
         super.visit(directive)
@@ -57,7 +63,7 @@ internal class AstIdentifiersChecker(private val program: Program, private val e
         if(decl.name in BuiltinFunctions)
             errors.err("builtin function cannot be redefined", decl.position)
 
-        if(decl.name in CompilationTarget.instance.machine.opcodeNames)
+        if(decl.name in compTarget.machine.opcodeNames)
             errors.err("can't use a cpu opcode name as a symbol: '${decl.name}'", decl.position)
 
         if(decl.datatype==DataType.STRUCT) {
@@ -96,7 +102,7 @@ internal class AstIdentifiersChecker(private val program: Program, private val e
     }
 
     override fun visit(subroutine: Subroutine) {
-        if(subroutine.name in CompilationTarget.instance.machine.opcodeNames) {
+        if(subroutine.name in compTarget.machine.opcodeNames) {
             errors.err("can't use a cpu opcode name as a symbol: '${subroutine.name}'", subroutine.position)
         } else if(subroutine.name in BuiltinFunctions) {
             // the builtin functions can't be redefined
@@ -136,7 +142,7 @@ internal class AstIdentifiersChecker(private val program: Program, private val e
     }
 
     override fun visit(label: Label) {
-        if(label.name in CompilationTarget.instance.machine.opcodeNames)
+        if(label.name in compTarget.machine.opcodeNames)
             errors.err("can't use a cpu opcode name as a symbol: '${label.name}'", label.position)
 
         if(label.name in BuiltinFunctions) {

compiler/src/prog8/compiler/astprocessing/AstVariousTransforms.kt

@@ -1,10 +1,16 @@
-package prog8.ast.processing
+package prog8.compiler.astprocessing
 
 import prog8.ast.Node
 import prog8.ast.Program
-import prog8.ast.base.*
+import prog8.ast.base.DataType
-import prog8.ast.expressions.*
+import prog8.ast.expressions.BinaryExpression
-import prog8.ast.statements.*
+import prog8.ast.expressions.StringLiteralValue
+import prog8.ast.statements.AnonymousScope
+import prog8.ast.statements.ParameterVarDecl
+import prog8.ast.statements.Subroutine
+import prog8.ast.statements.VarDecl
+import prog8.ast.walk.AstWalker
+import prog8.ast.walk.IAstModification
 
 
 internal class AstVariousTransforms(private val program: Program) : AstWalker() {

compiler/src/prog8/compiler/astprocessing/LiteralsToAutoVars.kt

@@ -1,10 +1,15 @@
-package prog8.ast.processing
+package prog8.compiler.astprocessing
 
 import prog8.ast.Node
 import prog8.ast.Program
-import prog8.ast.base.*
+import prog8.ast.base.DataType
-import prog8.ast.expressions.*
+import prog8.ast.expressions.ArrayLiteralValue
-import prog8.ast.statements.*
+import prog8.ast.expressions.IdentifierReference
+import prog8.ast.expressions.StringLiteralValue
+import prog8.ast.statements.VarDecl
+import prog8.ast.statements.WhenChoice
+import prog8.ast.walk.AstWalker
+import prog8.ast.walk.IAstModification
 
 
 internal class LiteralsToAutoVars(private val program: Program) : AstWalker() {

compiler/src/prog8/compiler/astprocessing/ReflectionAstWalker.kt

@@ -1,4 +1,4 @@
-package prog8.ast.processing
+package prog8.compiler.astprocessing
 
 
 /*

compiler/src/prog8/compiler/astprocessing/StatementReorderer.kt

@@ -1,10 +1,13 @@
-package prog8.ast.processing
+package prog8.compiler.astprocessing
 
 import prog8.ast.*
 import prog8.ast.base.*
 import prog8.ast.expressions.*
 import prog8.ast.statements.*
-import prog8.functions.BuiltinFunctions
+import prog8.ast.walk.AstWalker
+import prog8.ast.walk.IAstModification
+import prog8.compiler.ErrorReporter
+import prog8.compiler.functions.BuiltinFunctions
 
 
 internal class StatementReorderer(val program: Program, val errors: ErrorReporter) : AstWalker() {
@@ -82,7 +85,7 @@ internal class StatementReorderer(val program: Program, val errors: ErrorReporte
 
     override fun after(arrayIndexedExpression: ArrayIndexedExpression, parent: Node): Iterable<IAstModification> {
 
-        val arrayVar = arrayIndexedExpression.arrayvar.targetVarDecl(program.namespace)
+        val arrayVar = arrayIndexedExpression.arrayvar.targetVarDecl(program)
         if(arrayVar!=null && arrayVar.datatype ==  DataType.UWORD) {
             // rewrite   pointervar[index]  into  @(pointervar+index)
             val indexer = arrayIndexedExpression.indexer
@@ -140,7 +143,7 @@ internal class StatementReorderer(val program: Program, val errors: ErrorReporte
                 }
                 is IFunctionCall -> {
                     val argnum = parent.args.indexOf(expr)
-                    when (val callee = parent.target.targetStatement(program.namespace)) {
+                    when (val callee = parent.target.targetStatement(program)) {
                         is Subroutine -> {
                             val paramType = callee.parameters[argnum].type
                             if(leftDt isAssignableTo paramType) {
@@ -313,16 +316,16 @@ internal class StatementReorderer(val program: Program, val errors: ErrorReporte
 
     private fun flattenArrayAssignmentFromArrayLiteral(assign: Assignment): List<Assignment> {
         val identifier = assign.target.identifier!!
-        val targetVar = identifier.targetVarDecl(program.namespace)!!
+        val targetVar = identifier.targetVarDecl(program)!!
         val alv = assign.value as? ArrayLiteralValue
         return flattenArrayAssign(targetVar, alv, identifier, assign.position)
     }
 
     private fun flattenArrayAssignmentFromIdentifier(assign: Assignment): List<Assignment> {
         val identifier = assign.target.identifier!!
-        val targetVar = identifier.targetVarDecl(program.namespace)!!
+        val targetVar = identifier.targetVarDecl(program)!!
         val sourceIdent = assign.value as IdentifierReference
-        val sourceVar = sourceIdent.targetVarDecl(program.namespace)!!
+        val sourceVar = sourceIdent.targetVarDecl(program)!!
         if(!sourceVar.isArray) {
             errors.err("value must be an array",  sourceIdent.position)
             return emptyList()
@@ -352,7 +355,7 @@ internal class StatementReorderer(val program: Program, val errors: ErrorReporte
     private fun flattenStructAssignmentFromStructLiteral(structAssignment: Assignment): List<Assignment> {
         val identifier = structAssignment.target.identifier!!
         val identifierName = identifier.nameInSource.single()
-        val targetVar = identifier.targetVarDecl(program.namespace)!!
+        val targetVar = identifier.targetVarDecl(program)!!
         val struct = targetVar.struct!!
 
         val slv = structAssignment.value as? ArrayLiteralValue
@@ -376,11 +379,11 @@ internal class StatementReorderer(val program: Program, val errors: ErrorReporte
         // TODO use memcopy beyond a certain number of elements
         val identifier = structAssignment.target.identifier!!
         val identifierName = identifier.nameInSource.single()
-        val targetVar = identifier.targetVarDecl(program.namespace)!!
+        val targetVar = identifier.targetVarDecl(program)!!
         val struct = targetVar.struct!!
         when (structAssignment.value) {
             is IdentifierReference -> {
-                val sourceVar = (structAssignment.value as IdentifierReference).targetVarDecl(program.namespace)!!
+                val sourceVar = (structAssignment.value as IdentifierReference).targetVarDecl(program)!!
                 when {
                     sourceVar.struct!=null -> {
                         // struct memberwise copy

compiler/src/prog8/compiler/astprocessing/TypecastsAdder.kt

@@ -1,13 +1,15 @@
-package prog8.ast.processing
+package prog8.compiler.astprocessing
 
 import prog8.ast.IFunctionCall
-import prog8.ast.INameScope
 import prog8.ast.Node
 import prog8.ast.Program
 import prog8.ast.base.*
 import prog8.ast.expressions.*
 import prog8.ast.statements.*
-import prog8.functions.BuiltinFunctions
+import prog8.ast.walk.AstWalker
+import prog8.ast.walk.IAstModification
+import prog8.compiler.ErrorReporter
+import prog8.compiler.functions.BuiltinFunctions
 
 
 class TypecastsAdder(val program: Program, val errors: ErrorReporter) : AstWalker() {
@@ -106,18 +108,18 @@ class TypecastsAdder(val program: Program, val errors: ErrorReporter) : AstWalke
     }
 
     override fun after(functionCallStatement: FunctionCallStatement, parent: Node): Iterable<IAstModification> {
-        return afterFunctionCallArgs(functionCallStatement, functionCallStatement.definingScope())
+        return afterFunctionCallArgs(functionCallStatement)
     }
 
     override fun after(functionCall: FunctionCall, parent: Node): Iterable<IAstModification> {
-        return afterFunctionCallArgs(functionCall, functionCall.definingScope())
+        return afterFunctionCallArgs(functionCall)
     }
 
-    private fun afterFunctionCallArgs(call: IFunctionCall, scope: INameScope): Iterable<IAstModification> {
+    private fun afterFunctionCallArgs(call: IFunctionCall): Iterable<IAstModification> {
         // see if a typecast is needed to convert the arguments into the required parameter's type
         val modifications = mutableListOf<IAstModification>()
 
-        when(val sub = call.target.targetStatement(scope)) {
+        when(val sub = call.target.targetStatement(program)) {
             is Subroutine -> {
                 sub.parameters.zip(call.args).forEachIndexed { index, pair ->
                     val argItype = pair.second.inferType(program)

compiler/src/prog8/compiler/astprocessing/VariousCleanups.kt

@@ -0,0 +1,73 @@
+package prog8.compiler.astprocessing
+
+import prog8.ast.IFunctionCall
+import prog8.ast.INameScope
+import prog8.ast.Node
+import prog8.ast.base.Position
+import prog8.ast.expressions.DirectMemoryRead
+import prog8.ast.expressions.FunctionCall
+import prog8.ast.expressions.NumericLiteralValue
+import prog8.ast.expressions.TypecastExpression
+import prog8.ast.statements.*
+import prog8.ast.walk.AstWalker
+import prog8.ast.walk.IAstModification
+
+
+internal class VariousCleanups: AstWalker() {
+    private val noModifications = emptyList<IAstModification>()
+
+    override fun before(nopStatement: NopStatement, parent: Node): Iterable<IAstModification> {
+        return listOf(IAstModification.Remove(nopStatement, parent as INameScope))
+    }
+
+    override fun before(scope: AnonymousScope, parent: Node): Iterable<IAstModification> {
+        return if(parent is INameScope)
+            listOf(ScopeFlatten(scope, parent as INameScope))
+        else
+            noModifications
+    }
+
+    class ScopeFlatten(val scope: AnonymousScope, val into: INameScope) : IAstModification {
+        override fun perform() {
+            val idx = into.statements.indexOf(scope)
+            if(idx>=0) {
+                into.statements.addAll(idx+1, scope.statements)
+                into.statements.remove(scope)
+            }
+        }
+    }
+
+    override fun before(typecast: TypecastExpression, parent: Node): Iterable<IAstModification> {
+        if(typecast.expression is NumericLiteralValue) {
+            val value = (typecast.expression as NumericLiteralValue).cast(typecast.type)
+            if(value.isValid)
+                return listOf(IAstModification.ReplaceNode(typecast, value.valueOrZero(), parent))
+        }
+
+        return noModifications
+    }
+
+    override fun before(functionCallStatement: FunctionCallStatement, parent: Node): Iterable<IAstModification> {
+        return before(functionCallStatement as IFunctionCall, parent, functionCallStatement.position)
+    }
+
+    override fun before(functionCall: FunctionCall, parent: Node): Iterable<IAstModification> {
+        return before(functionCall as IFunctionCall, parent, functionCall.position)
+    }
+
+    private fun before(functionCall: IFunctionCall, parent: Node, position: Position): Iterable<IAstModification> {
+        if(functionCall.target.nameInSource==listOf("peek")) {
+            // peek(a) is synonymous with @(a)
+            val memread = DirectMemoryRead(functionCall.args.single(), position)
+            return listOf(IAstModification.ReplaceNode(functionCall as Node, memread, parent))
+        }
+        if(functionCall.target.nameInSource==listOf("poke")) {
+            // poke(a, v) is synonymous with @(a) = v
+            val tgt = AssignTarget(null, null, DirectMemoryWrite(functionCall.args[0], position), position)
+            val assign = Assignment(tgt, functionCall.args[1], position)
+            return listOf(IAstModification.ReplaceNode(functionCall as Node, assign, parent))
+        }
+        return noModifications
+    }
+
+}

compiler/src/prog8/compiler/astprocessing/VerifyFunctionArgTypes.kt

@@ -1,26 +1,26 @@
-package prog8.ast.processing
+package prog8.compiler.astprocessing
 
 import prog8.ast.IFunctionCall
-import prog8.ast.INameScope
 import prog8.ast.Program
 import prog8.ast.base.DataType
 import prog8.ast.expressions.Expression
 import prog8.ast.expressions.FunctionCall
 import prog8.ast.expressions.TypecastExpression
 import prog8.ast.statements.*
+import prog8.ast.walk.IAstVisitor
 import prog8.compiler.CompilerException
-import prog8.functions.BuiltinFunctions
+import prog8.compiler.functions.BuiltinFunctions
 
 class VerifyFunctionArgTypes(val program: Program) : IAstVisitor {
 
     override fun visit(functionCall: FunctionCall) {
-        val error = checkTypes(functionCall as IFunctionCall, functionCall.definingScope(), program)
+        val error = checkTypes(functionCall as IFunctionCall, program)
         if(error!=null)
             throw CompilerException(error)
     }
 
     override fun visit(functionCallStatement: FunctionCallStatement) {
-        val error = checkTypes(functionCallStatement as IFunctionCall, functionCallStatement.definingScope(), program)
+        val error = checkTypes(functionCallStatement as IFunctionCall, program)
         if (error!=null)
             throw CompilerException(error)
     }
@@ -39,13 +39,13 @@ class VerifyFunctionArgTypes(val program: Program) : IAstVisitor {
             return false
         }
 
-        fun checkTypes(call: IFunctionCall, scope: INameScope, program: Program): String? {
+        fun checkTypes(call: IFunctionCall, program: Program): String? {
             val argITypes = call.args.map { it.inferType(program) }
             val firstUnknownDt = argITypes.indexOfFirst { it.isUnknown }
             if(firstUnknownDt>=0)
                 return "argument ${firstUnknownDt+1} invalid argument type"
             val argtypes = argITypes.map { it.typeOrElse(DataType.STRUCT) }
-            val target = call.target.targetStatement(scope)
+            val target = call.target.targetStatement(program)
             if (target is Subroutine) {
                 if(call.args.size != target.parameters.size)
                     return "invalid number of arguments"

compiler/src/prog8/compiler/functions/BuiltinFunctions.kt

@@ -1,4 +1,4 @@
-package prog8.functions
+package prog8.compiler.functions
 
 import prog8.ast.Program
 import prog8.ast.base.*
@@ -6,6 +6,7 @@ import prog8.ast.expressions.*
 import prog8.ast.statements.StructDecl
 import prog8.ast.statements.VarDecl
 import prog8.compiler.CompilerException
+import prog8.compiler.target.ICompilationTarget
 import kotlin.math.*
 
 
@@ -128,9 +129,13 @@ private val functionSignatures: List<FSignature> = listOf(
     FSignature("ceil"        , true, listOf(FParam("value", setOf(DataType.FLOAT))), DataType.FLOAT) { a, p, prg -> oneDoubleArgOutputWord(a, p, prg, Math::ceil) },
     FSignature("any"         , true, listOf(FParam("values", ArrayDatatypes)), DataType.UBYTE) { a, p, prg -> collectionArg(a, p, prg, ::builtinAny) },
     FSignature("all"         , true, listOf(FParam("values", ArrayDatatypes)), DataType.UBYTE) { a, p, prg -> collectionArg(a, p, prg, ::builtinAll) },
-    FSignature("lsb"         , true, listOf(FParam("value", setOf(DataType.UWORD, DataType.WORD))), DataType.UBYTE) { a, p, prg -> oneIntArgOutputInt(a, p, prg) { x: Int -> x and 255 }},
+    FSignature("lsb"         , true, listOf(FParam("value", setOf(DataType.UWORD, DataType.WORD))), DataType.UBYTE) { a, p, prg -> oneIntArgOutputInt(a, p, prg) { x: Int -> x and 255 } },
-    FSignature("msb"         , true, listOf(FParam("value", setOf(DataType.UWORD, DataType.WORD))), DataType.UBYTE) { a, p, prg -> oneIntArgOutputInt(a, p, prg) { x: Int -> x ushr 8 and 255}},
+    FSignature("msb"         , true, listOf(FParam("value", setOf(DataType.UWORD, DataType.WORD))), DataType.UBYTE) { a, p, prg -> oneIntArgOutputInt(a, p, prg) { x: Int -> x ushr 8 and 255} },
     FSignature("mkword"      , true, listOf(FParam("msb", setOf(DataType.UBYTE)), FParam("lsb", setOf(DataType.UBYTE))), DataType.UWORD, ::builtinMkword),
+    FSignature("peek"        , true, listOf(FParam("address", setOf(DataType.UWORD))), DataType.UBYTE),
+    FSignature("peekw"       , true, listOf(FParam("address", setOf(DataType.UWORD))), DataType.UWORD),
+    FSignature("poke"        , false, listOf(FParam("address", setOf(DataType.UWORD)), FParam("value", setOf(DataType.UBYTE))), null),
+    FSignature("pokew"       , false, listOf(FParam("address", setOf(DataType.UWORD)), FParam("value", setOf(DataType.UWORD))), null),
     FSignature("rnd"         , false, emptyList(), DataType.UBYTE),
     FSignature("rndw"        , false, emptyList(), DataType.UWORD),
     FSignature("rndf"        , false, emptyList(), DataType.FLOAT),
@@ -286,7 +291,7 @@ private fun builtinOffsetof(args: List<Expression>, position: Position, program:
     val idref = args[0] as? IdentifierReference
         ?: throw SyntaxError("offsetof argument should be an identifier", position)
 
-    val vardecl = idref.targetVarDecl(program.namespace)!!
+    val vardecl = idref.targetVarDecl(program)!!
     val struct = vardecl.struct
     if (struct == null || vardecl.datatype == DataType.STRUCT)
         throw SyntaxError("offsetof can only be used on struct members", position)
@@ -296,7 +301,7 @@ private fun builtinOffsetof(args: List<Expression>, position: Position, program:
     for(member in struct.statements) {
         if((member as VarDecl).name == membername)
             return NumericLiteralValue(DataType.UBYTE, offset, position)
-        offset += member.datatype.memorySize()
+        offset += ICompilationTarget.instance.memorySize(member.datatype)
     }
     throw SyntaxError("undefined struct member", position)
 }
@@ -310,17 +315,17 @@ private fun builtinSizeof(args: List<Expression>, position: Position, program: P
 
     val dt = args[0].inferType(program)
     if(dt.isKnown) {
-        val target = (args[0] as IdentifierReference).targetStatement(program.namespace)
+        val target = (args[0] as IdentifierReference).targetStatement(program)
                 ?: throw CannotEvaluateException("sizeof", "no target")
 
         fun structSize(target: StructDecl) =
-                NumericLiteralValue(DataType.UBYTE, target.statements.map { (it as VarDecl).datatype.memorySize() }.sum(), position)
+                NumericLiteralValue(DataType.UBYTE, target.statements.map { ICompilationTarget.instance.memorySize((it as VarDecl).datatype) }.sum(), position)
 
         return when {
             dt.typeOrElse(DataType.STRUCT) in ArrayDatatypes -> {
                 val length = (target as VarDecl).arraysize!!.constIndex() ?: throw CannotEvaluateException("sizeof", "unknown array size")
                 val elementDt = ArrayElementTypes.getValue(dt.typeOrElse(DataType.STRUCT))
-                numericLiteral(elementDt.memorySize() * length, position)
+                numericLiteral(ICompilationTarget.instance.memorySize(elementDt) * length, position)
             }
             dt.istype(DataType.STRUCT) -> {
                 when (target) {
@@ -330,7 +335,7 @@ private fun builtinSizeof(args: List<Expression>, position: Position, program: P
                 }
             }
             dt.istype(DataType.STR) -> throw SyntaxError("sizeof str is undefined, did you mean len?", position)
-            else -> NumericLiteralValue(DataType.UBYTE, dt.typeOrElse(DataType.STRUCT).memorySize(), position)
+            else -> NumericLiteralValue(DataType.UBYTE, ICompilationTarget.instance.memorySize(dt.typeOrElse(DataType.STRUCT)), position)
         }
     } else {
         throw SyntaxError("sizeof invalid argument type", position)
@@ -342,7 +347,7 @@ private fun builtinLen(args: List<Expression>, position: Position, program: Prog
     if(args.size!=1)
         throw SyntaxError("len requires one argument", position)
 
-    val directMemVar = ((args[0] as? DirectMemoryRead)?.addressExpression as? IdentifierReference)?.targetVarDecl(program.namespace)
+    val directMemVar = ((args[0] as? DirectMemoryRead)?.addressExpression as? IdentifierReference)?.targetVarDecl(program)
     var arraySize = directMemVar?.arraysize?.constIndex()
     if(arraySize != null)
         return NumericLiteralValue.optimalInteger(arraySize, position)
@@ -350,7 +355,7 @@ private fun builtinLen(args: List<Expression>, position: Position, program: Prog
         return NumericLiteralValue.optimalInteger((args[0] as ArrayLiteralValue).value.size, position)
     if(args[0] !is IdentifierReference)
         throw SyntaxError("len argument should be an identifier", position)
-    val target = (args[0] as IdentifierReference).targetVarDecl(program.namespace)
+    val target = (args[0] as IdentifierReference).targetVarDecl(program)
             ?: throw CannotEvaluateException("len", "no target vardecl")
 
     return when(target.datatype) {

compiler/src/prog8/compiler/target/CompilationTarget.kt

@@ -1,47 +0,0 @@
-package prog8.compiler.target
-
-import prog8.ast.Program
-import prog8.ast.base.ErrorReporter
-import prog8.compiler.CompilationOptions
-import prog8.compiler.Zeropage
-import prog8.compiler.target.c64.C64MachineDefinition
-import prog8.compiler.target.c64.Petscii
-import prog8.compiler.target.c64.codegen.AsmGen
-import prog8.compiler.target.cx16.CX16MachineDefinition
-import java.nio.file.Path
-
-
-internal interface CompilationTarget {
-    val name: String
-    val machine: IMachineDefinition
-    fun encodeString(str: String, altEncoding: Boolean): List<Short>
-    fun decodeString(bytes: List<Short>, altEncoding: Boolean): String
-    fun asmGenerator(program: Program, errors: ErrorReporter, zp: Zeropage, options: CompilationOptions, path: Path): IAssemblyGenerator
-
-    companion object {
-        lateinit var instance: CompilationTarget
-    }
-}
-
-
-internal object C64Target: CompilationTarget {
-    override val name = "c64"
-    override val machine = C64MachineDefinition
-    override fun encodeString(str: String, altEncoding: Boolean) =
-            if(altEncoding) Petscii.encodeScreencode(str, true) else Petscii.encodePetscii(str, true)
-    override fun decodeString(bytes: List<Short>, altEncoding: Boolean) =
-            if(altEncoding) Petscii.decodeScreencode(bytes, true) else Petscii.decodePetscii(bytes, true)
-    override fun asmGenerator(program: Program, errors: ErrorReporter, zp: Zeropage, options: CompilationOptions, path: Path) =
-            AsmGen(program, errors, zp, options, path)
-}
-
-internal object Cx16Target: CompilationTarget {
-    override val name = "cx16"
-    override val machine = CX16MachineDefinition
-    override fun encodeString(str: String, altEncoding: Boolean) =
-            if(altEncoding) Petscii.encodeScreencode(str, true) else Petscii.encodePetscii(str, true)
-    override fun decodeString(bytes: List<Short>, altEncoding: Boolean) =
-            if(altEncoding) Petscii.decodeScreencode(bytes, true) else Petscii.decodePetscii(bytes, true)
-    override fun asmGenerator(program: Program, errors: ErrorReporter, zp: Zeropage, options: CompilationOptions, path: Path) =
-            AsmGen(program, errors, zp, options, path)
-}

compiler/src/prog8/compiler/target/ICompilationTarget.kt

@@ -0,0 +1,123 @@
+package prog8.compiler.target
+
+import prog8.ast.IStringEncoding
+import prog8.ast.Program
+import prog8.ast.base.*
+import prog8.ast.expressions.IdentifierReference
+import prog8.ast.expressions.NumericLiteralValue
+import prog8.ast.statements.AssignTarget
+import prog8.compiler.CompilationOptions
+import prog8.compiler.ErrorReporter
+import prog8.compiler.Zeropage
+import prog8.compiler.target.c64.C64MachineDefinition
+import prog8.compiler.target.c64.Petscii
+import prog8.compiler.target.c64.codegen.AsmGen
+import prog8.compiler.target.cx16.CX16MachineDefinition
+import java.nio.file.Path
+
+
+internal interface ICompilationTarget: IStringEncoding {
+    val name: String
+    val machine: IMachineDefinition
+    override fun encodeString(str: String, altEncoding: Boolean): List<Short>
+    override fun decodeString(bytes: List<Short>, altEncoding: Boolean): String
+    fun memorySize(dt: DataType): Int
+
+    companion object {
+        lateinit var instance: ICompilationTarget           // TODO reduce dependency on this by just passing the instance as a parameter
+    }
+
+    fun isInRegularRAM(target: AssignTarget, program: Program): Boolean {
+        val memAddr = target.memoryAddress
+        val arrayIdx = target.arrayindexed
+        val ident = target.identifier
+        when {
+            memAddr != null -> {
+                return when (memAddr.addressExpression) {
+                    is NumericLiteralValue -> {
+                        machine.isRegularRAMaddress((memAddr.addressExpression as NumericLiteralValue).number.toInt())
+                    }
+                    is IdentifierReference -> {
+                        val decl = (memAddr.addressExpression as IdentifierReference).targetVarDecl(program)
+                        if ((decl?.type == VarDeclType.VAR || decl?.type == VarDeclType.CONST) && decl.value is NumericLiteralValue)
+                            machine.isRegularRAMaddress((decl.value as NumericLiteralValue).number.toInt())
+                        else
+                            false
+                    }
+                    else -> false
+                }
+            }
+            arrayIdx != null -> {
+                val targetStmt = arrayIdx.arrayvar.targetVarDecl(program)
+                return if (targetStmt?.type == VarDeclType.MEMORY) {
+                    val addr = targetStmt.value as? NumericLiteralValue
+                    if (addr != null)
+                        machine.isRegularRAMaddress(addr.number.toInt())
+                    else
+                        false
+                } else true
+            }
+            ident != null -> {
+                val decl = ident.targetVarDecl(program)!!
+                return if (decl.type == VarDeclType.MEMORY && decl.value is NumericLiteralValue)
+                    machine.isRegularRAMaddress((decl.value as NumericLiteralValue).number.toInt())
+                else
+                    true
+            }
+            else -> return true
+        }
+    }
+
+}
+
+
+internal object C64Target: ICompilationTarget {
+    override val name = "c64"
+    override val machine = C64MachineDefinition
+    override fun encodeString(str: String, altEncoding: Boolean) =
+            if(altEncoding) Petscii.encodeScreencode(str, true) else Petscii.encodePetscii(str, true)
+    override fun decodeString(bytes: List<Short>, altEncoding: Boolean) =
+            if(altEncoding) Petscii.decodeScreencode(bytes, true) else Petscii.decodePetscii(bytes, true)
+
+    override fun memorySize(dt: DataType): Int {
+        return when(dt) {
+            in ByteDatatypes -> 1
+            in WordDatatypes -> 2
+            DataType.FLOAT -> machine.FLOAT_MEM_SIZE
+            in PassByReferenceDatatypes -> machine.POINTER_MEM_SIZE
+            else -> -9999999
+        }
+    }
+}
+
+internal object Cx16Target: ICompilationTarget {
+    override val name = "cx16"
+    override val machine = CX16MachineDefinition
+    override fun encodeString(str: String, altEncoding: Boolean) =
+            if(altEncoding) Petscii.encodeScreencode(str, true) else Petscii.encodePetscii(str, true)
+    override fun decodeString(bytes: List<Short>, altEncoding: Boolean) =
+            if(altEncoding) Petscii.decodeScreencode(bytes, true) else Petscii.decodePetscii(bytes, true)
+
+    override fun memorySize(dt: DataType): Int {
+        return when(dt) {
+            in ByteDatatypes -> 1
+            in WordDatatypes -> 2
+            DataType.FLOAT -> machine.FLOAT_MEM_SIZE
+            in PassByReferenceDatatypes -> machine.POINTER_MEM_SIZE
+            else -> -9999999
+        }
+    }
+}
+
+
+internal fun asmGeneratorFor(
+    compTarget: ICompilationTarget,
+    program: Program,
+    errors: ErrorReporter,
+    zp: Zeropage,
+    options: CompilationOptions,
+    outputDir: Path
+): IAssemblyGenerator
+{
+    return AsmGen(program, errors, zp, options, compTarget, outputDir)
+}

compiler/src/prog8/compiler/target/IMachineDefinition.kt

@@ -1,5 +1,6 @@
 package prog8.compiler.target
 
+import prog8.ast.IStringEncoding
 import prog8.ast.Program
 import prog8.compiler.CompilationOptions
 import prog8.compiler.Zeropage
@@ -32,7 +33,11 @@ internal interface IMachineDefinition {
 
     fun initializeZeropage(compilerOptions: CompilationOptions)
     fun getFloat(num: Number): IMachineFloat
-    fun importLibs(compilerOptions: CompilationOptions, importer: ModuleImporter, program: Program)
+
+    // TODO don't do the importing here, just return a list of modules to import...:
+    fun importLibs(compilerOptions: CompilationOptions, importer: ModuleImporter, program: Program,
+        encoder: IStringEncoding, compilationTargetName: String)
+
     fun launchEmulator(programName: String)
     fun isRegularRAMaddress(address: Int): Boolean
 }

compiler/src/prog8/compiler/target/c64/AssemblyProgram.kt

@@ -2,13 +2,12 @@ package prog8.compiler.target.c64
 
 import prog8.compiler.CompilationOptions
 import prog8.compiler.OutputType
-import prog8.compiler.target.CompilationTarget
 import prog8.compiler.target.IAssemblyProgram
 import prog8.compiler.target.generatedLabelPrefix
 import java.nio.file.Path
 import kotlin.system.exitProcess
 
-class AssemblyProgram(override val name: String, outputDir: Path) : IAssemblyProgram {
+class AssemblyProgram(override val name: String, outputDir: Path, private val compTarget: String) : IAssemblyProgram {
     private val assemblyFile = outputDir.resolve("$name.asm")
     private val prgFile = outputDir.resolve("$name.prg")
     private val binFile = outputDir.resolve("$name.bin")
@@ -23,12 +22,12 @@ class AssemblyProgram(override val name: String, outputDir: Path) : IAssemblyPro
         val outFile = when (options.output) {
             OutputType.PRG -> {
                 command.add("--cbm-prg")
-                println("\nCreating prg for target ${CompilationTarget.instance.name}.")
+                println("\nCreating prg for target $compTarget.")
                 prgFile
             }
             OutputType.RAW -> {
                 command.add("--nostart")
-                println("\nCreating raw binary for target ${CompilationTarget.instance.name}.")
+                println("\nCreating raw binary for target $compTarget.")
                 binFile
             }
         }

compiler/src/prog8/compiler/target/c64/C64MachineDefinition.kt

@@ -1,5 +1,6 @@
 package prog8.compiler.target.c64
 
+import prog8.ast.IStringEncoding
 import prog8.ast.Program
 import prog8.compiler.*
 import prog8.compiler.target.CpuType
@@ -30,9 +31,15 @@ internal object C64MachineDefinition: IMachineDefinition {
 
     override fun getFloat(num: Number) = Mflpt5.fromNumber(num)
 
-    override fun importLibs(compilerOptions: CompilationOptions, importer: ModuleImporter, program: Program) {
+    override fun importLibs(
+            compilerOptions: CompilationOptions,
+            importer: ModuleImporter,
+            program: Program,
+            encoder: IStringEncoding,
+            compilationTargetName: String)
+    {
         if (compilerOptions.launcher == LauncherType.BASIC || compilerOptions.output == OutputType.PRG)
-            importer.importLibraryModule(program, "syslib")
+            importer.importLibraryModule(program, "syslib", encoder, compilationTargetName)
     }
 
     override fun launchEmulator(programName: String) {

compiler/src/prog8/compiler/target/c64/codegen/AsmGen.kt

@@ -1,26 +1,18 @@
 package prog8.compiler.target.c64.codegen
 
-import prog8.ast.IFunctionCall
+import prog8.ast.*
-import prog8.ast.INameScope
-import prog8.ast.Node
-import prog8.ast.Program
 import prog8.ast.antlr.escape
 import prog8.ast.base.*
 import prog8.ast.expressions.*
 import prog8.ast.statements.*
 import prog8.compiler.*
+import prog8.compiler.functions.BuiltinFunctions
+import prog8.compiler.functions.FSignature
 import prog8.compiler.target.*
-import prog8.compiler.target.CompilationTarget
-import prog8.compiler.target.CpuType
-import prog8.compiler.target.IAssemblyGenerator
-import prog8.compiler.target.IAssemblyProgram
 import prog8.compiler.target.c64.AssemblyProgram
 import prog8.compiler.target.c64.Petscii
 import prog8.compiler.target.c64.codegen.assignment.AsmAssignment
 import prog8.compiler.target.c64.codegen.assignment.AssignmentAsmGen
-import prog8.compiler.target.generatedLabelPrefix
-import prog8.functions.BuiltinFunctions
-import prog8.functions.FSignature
 import java.io.CharConversionException
 import java.nio.file.Path
 import java.time.LocalDate
@@ -33,6 +25,7 @@ internal class AsmGen(private val program: Program,
                       val errors: ErrorReporter,
                       val zeropage: Zeropage,
                       val options: CompilationOptions,
+                      val compTarget: ICompilationTarget,
                       private val outputDir: Path): IAssemblyGenerator {
 
     // for expressions and augmented assignments:
@@ -43,12 +36,12 @@ internal class AsmGen(private val program: Program,
     private val globalFloatConsts = mutableMapOf<Double, String>()     // all float values in the entire program (value -> varname)
     private val allocatedZeropageVariables = mutableMapOf<String, Pair<Int, DataType>>()
     private val breakpointLabels = mutableListOf<String>()
-    private val builtinFunctionsAsmGen = BuiltinFunctionsAsmGen(program, this)
     private val forloopsAsmGen = ForLoopsAsmGen(program, this)
     private val postincrdecrAsmGen = PostIncrDecrAsmGen(program, this)
     private val functioncallAsmGen = FunctionCallAsmGen(program, this)
     private val expressionsAsmGen = ExpressionsAsmGen(program, this)
     private val assignmentAsmGen = AssignmentAsmGen(program, this, expressionsAsmGen)
+    private val builtinFunctionsAsmGen = BuiltinFunctionsAsmGen(program, this, assignmentAsmGen)
     internal val loopEndLabels = ArrayDeque<String>()
     private val blockLevelVarInits = mutableMapOf<Block, MutableSet<VarDecl>>()
     internal val slabs = mutableMapOf<String, Int>()
@@ -92,13 +85,13 @@ internal class AsmGen(private val program: Program,
             }
         }
 
-        return AssemblyProgram(program.name, outputDir)
+        return AssemblyProgram(program.name, outputDir, compTarget.name)
     }
 
 
     private fun header() {
         val ourName = this.javaClass.name
-        val cpu = when(CompilationTarget.instance.machine.cpu) {
+        val cpu = when(compTarget.machine.cpu) {
             CpuType.CPU6502 -> "6502"
             CpuType.CPU65c02 -> "65c02"
             else -> "unsupported"
@@ -113,16 +106,16 @@ internal class AsmGen(private val program: Program,
         program.actualLoadAddress = program.definedLoadAddress
         if (program.actualLoadAddress == 0)   // fix load address
             program.actualLoadAddress = if (options.launcher == LauncherType.BASIC)
-                CompilationTarget.instance.machine.BASIC_LOAD_ADDRESS else CompilationTarget.instance.machine.RAW_LOAD_ADDRESS
+                compTarget.machine.BASIC_LOAD_ADDRESS else compTarget.machine.RAW_LOAD_ADDRESS
 
         // the global prog8 variables needed
-        val zp = CompilationTarget.instance.machine.zeropage
+        val zp = compTarget.machine.zeropage
         out("P8ZP_SCRATCH_B1 = ${zp.SCRATCH_B1}")
         out("P8ZP_SCRATCH_REG = ${zp.SCRATCH_REG}")
         out("P8ZP_SCRATCH_W1 = ${zp.SCRATCH_W1}    ; word")
         out("P8ZP_SCRATCH_W2 = ${zp.SCRATCH_W2}    ; word")
-        out("P8ESTACK_LO = ${CompilationTarget.instance.machine.ESTACK_LO.toHex()}")
+        out("P8ESTACK_LO = ${compTarget.machine.ESTACK_LO.toHex()}")
-        out("P8ESTACK_HI = ${CompilationTarget.instance.machine.ESTACK_HI.toHex()}")
+        out("P8ESTACK_HI = ${compTarget.machine.ESTACK_HI.toHex()}")
 
         when {
             options.launcher == LauncherType.BASIC -> {
@@ -136,13 +129,13 @@ internal class AsmGen(private val program: Program,
                 out("+\t.word  0")
                 out("_prog8_entrypoint\t; assembly code starts here\n")
                 if(!options.noSysInit)
-                    out("  jsr  ${CompilationTarget.instance.name}.init_system")
+                    out("  jsr  ${compTarget.name}.init_system")
             }
             options.output == OutputType.PRG -> {
                 out("; ---- program without basic sys call ----")
                 out("* = ${program.actualLoadAddress.toHex()}\n")
                 if(!options.noSysInit)
-                    out("  jsr  ${CompilationTarget.instance.name}.init_system")
+                    out("  jsr  ${compTarget.name}.init_system")
             }
             options.output == OutputType.RAW -> {
                 out("; ---- raw assembler program ----")
@@ -174,7 +167,7 @@ internal class AsmGen(private val program: Program,
         // the global list of all floating point constants for the whole program
         out("; global float constants")
         for (flt in globalFloatConsts) {
-            val floatFill = CompilationTarget.instance.machine.getFloat(flt.key).makeFloatFillAsm()
+            val floatFill = compTarget.machine.getFloat(flt.key).makeFloatFillAsm()
             val floatvalue = flt.key
             out("${flt.value}\t.byte  $floatFill  ; float $floatvalue")
         }
@@ -185,9 +178,10 @@ internal class AsmGen(private val program: Program,
         out("\n\n; ---- block: '${block.name}' ----")
         out("${block.name}\t" + (if("force_output" in block.options()) ".block\n" else ".proc\n"))
 
-        if(block.address!=null) {
+        val addr = block.address
-            out(".cerror * > ${block.address.toHex()}, 'block address overlaps by ', *-${block.address.toHex()},' bytes'")
+        if(addr!=null) {
-            out("* = ${block.address.toHex()}")
+            out(".cerror * > ${addr.toHex()}, 'block address overlaps by ', *-${addr.toHex()},' bytes'")
+            out("* = ${addr.toHex()}")
         }
 
         outputSourceLine(block)
@@ -344,7 +338,7 @@ internal class AsmGen(private val program: Program,
                         }
                 val floatFills = array.map {
                     val number = (it as NumericLiteralValue).number
-                    CompilationTarget.instance.machine.getFloat(number).makeFloatFillAsm()
+                    compTarget.machine.getFloat(number).makeFloatFillAsm()
                 }
                 out(name)
                 for (f in array.zip(floatFills))
@@ -364,10 +358,11 @@ internal class AsmGen(private val program: Program,
         }
         val asmSubs = statements.filterIsInstance<Subroutine>().filter { it.isAsmSubroutine }
         for(sub in asmSubs) {
-            if(sub.asmAddress!=null) {
+            val addr = sub.asmAddress
+            if(addr!=null) {
                 if(sub.statements.isNotEmpty())
                     throw AssemblyError("kernel subroutine cannot have statements")
-                out("  ${sub.name} = ${sub.asmAddress.toHex()}")
+                out("  ${sub.name} = ${addr.toHex()}")
             }
         }
     }
@@ -433,10 +428,10 @@ internal class AsmGen(private val program: Program,
                         "$" + it.number.toInt().toString(16).padStart(4, '0')
                     }
                     is AddressOf -> {
-                        it.identifier.firstStructVarName(program.namespace) ?: asmSymbolName(it.identifier)
+                        it.identifier.firstStructVarName(program) ?: asmSymbolName(it.identifier)
                     }
                     is IdentifierReference -> {
-                        it.firstStructVarName(program.namespace) ?: asmSymbolName(it)
+                        it.firstStructVarName(program) ?: asmSymbolName(it)
                     }
                     else -> throw AssemblyError("weird array elt dt")
                 }
@@ -498,17 +493,23 @@ internal class AsmGen(private val program: Program,
     }
 
     internal fun asmSymbolName(identifier: IdentifierReference): String {
-        return if(identifier.memberOfStruct(program.namespace)!=null) {
+        return if(identifier.memberOfStruct(program)!=null) {
-            val name = identifier.targetVarDecl(program.namespace)!!.name
+            val name = identifier.targetVarDecl(program)!!.name
             fixNameSymbols(name)
         } else {
             fixNameSymbols(identifier.nameInSource.joinToString("."))
         }
     }
 
+    internal fun asmSymbolName(regs: RegisterOrPair): String =
+        if(regs in Cx16VirtualRegisters)
+            "cx16." + regs.toString().toLowerCase()
+        else
+            throw AssemblyError("no symbol name for register $regs")
+
     internal fun asmVariableName(identifier: IdentifierReference): String {
-        return if(identifier.memberOfStruct(program.namespace)!=null) {
+        return if(identifier.memberOfStruct(program)!=null) {
-            val name = identifier.targetVarDecl(program.namespace)!!.name
+            val name = identifier.targetVarDecl(program)!!.name
             fixNameSymbols(name)
         } else {
             fixNameSymbols(identifier.nameInSource.joinToString("."))
@@ -524,9 +525,9 @@ internal class AsmGen(private val program: Program,
     internal fun loadByteFromPointerIntoA(pointervar: IdentifierReference): Pair<Boolean, String> {
         // returns if the pointer is already on the ZP itself or not (in the latter case SCRATCH_W1 is used as intermediary)
         val sourceName = asmVariableName(pointervar)
-        val vardecl = pointervar.targetVarDecl(program.namespace)!!
+        val vardecl = pointervar.targetVarDecl(program)!!
         val scopedName = vardecl.makeScopedName(vardecl.name)
-        if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02) {
+        if (compTarget.machine.cpu == CpuType.CPU65c02) {
             return if (isZpVar(scopedName)) {
                 // pointervar is already in the zero page, no need to copy
                 out("  lda  ($sourceName)")
@@ -561,7 +562,7 @@ internal class AsmGen(private val program: Program,
     private  fun fixNameSymbols(name: String) = name.replace("<", "prog8_").replace(">", "")     // take care of the autogenerated invalid (anon) label names
 
     internal fun saveRegisterLocal(register: CpuRegister, scope: Subroutine) {
-        if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02) {
+        if (compTarget.machine.cpu == CpuType.CPU65c02) {
             // just use the cpu's stack for all registers, shorter code
             when (register) {
                 CpuRegister.A -> out("  pha")
@@ -590,7 +591,7 @@ internal class AsmGen(private val program: Program,
         when (register) {
             CpuRegister.A -> out("  pha")
             CpuRegister.X -> {
-                if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02) out("  phx")
+                if (compTarget.machine.cpu == CpuType.CPU65c02) out("  phx")
                 else {
                     if(keepA)
                         out("  sta  P8ZP_SCRATCH_REG |  txa |  pha  |  lda  P8ZP_SCRATCH_REG")
@@ -599,7 +600,7 @@ internal class AsmGen(private val program: Program,
                 }
             }
             CpuRegister.Y -> {
-                if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02) out("  phy")
+                if (compTarget.machine.cpu == CpuType.CPU65c02) out("  phy")
                 else {
                     if(keepA)
                         out("  sta  P8ZP_SCRATCH_REG |  tya |  pha  |  lda  P8ZP_SCRATCH_REG")
@@ -611,7 +612,7 @@ internal class AsmGen(private val program: Program,
     }
 
     internal fun restoreRegisterLocal(register: CpuRegister) {
-        if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02) {
+        if (compTarget.machine.cpu == CpuType.CPU65c02) {
             when (register) {
                 // this just used the stack, for all registers. Shorter code.
                 CpuRegister.A -> out("  pla")
@@ -636,7 +637,7 @@ internal class AsmGen(private val program: Program,
                 out("  pla")
             }
             CpuRegister.X -> {
-                if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02) out("  plx")
+                if (compTarget.machine.cpu == CpuType.CPU65c02) out("  plx")
                 else {
                     if(keepA)
                         out("  sta  P8ZP_SCRATCH_REG |  pla |  tax |  lda  P8ZP_SCRATCH_REG")
@@ -645,7 +646,7 @@ internal class AsmGen(private val program: Program,
                 }
             }
             CpuRegister.Y -> {
-                if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02) out("  ply")
+                if (compTarget.machine.cpu == CpuType.CPU65c02) out("  ply")
                 else {
                     if(keepA)
                         out("  sta  P8ZP_SCRATCH_REG |  pla |  tay |  lda  P8ZP_SCRATCH_REG")
@@ -705,7 +706,7 @@ internal class AsmGen(private val program: Program,
         val reg = register.toString().toLowerCase()
         val indexnum = expr.indexer.constIndex()
         if(indexnum!=null) {
-            val indexValue = indexnum * elementDt.memorySize() + if(addOneExtra) 1 else 0
+            val indexValue = indexnum * compTarget.memorySize(elementDt) + if(addOneExtra) 1 else 0
             out("  ld$reg  #$indexValue")
             return
         }
@@ -731,7 +732,7 @@ internal class AsmGen(private val program: Program,
                     }
                 }
                 DataType.FLOAT -> {
-                    require(DataType.FLOAT.memorySize()==5)
+                    require(compTarget.memorySize(DataType.FLOAT)==5)
                     out("""
                                 lda  $indexName
                                 asl  a
@@ -758,7 +759,7 @@ internal class AsmGen(private val program: Program,
                     }
                 }
                 DataType.FLOAT -> {
-                    require(DataType.FLOAT.memorySize()==5)
+                    require(compTarget.memorySize(DataType.FLOAT)==5)
                     out("""
                                 lda  $indexName
                                 asl  a
@@ -782,8 +783,8 @@ internal class AsmGen(private val program: Program,
     internal fun translateExpression(indexer: ArrayIndex) =
             expressionsAsmGen.translateExpression(indexer)
 
-    internal fun translateBuiltinFunctionCallExpression(functionCall: FunctionCall, signature: FSignature, resultToStack: Boolean) =
+    internal fun translateBuiltinFunctionCallExpression(functionCall: FunctionCall, signature: FSignature, resultToStack: Boolean, resultRegister: RegisterOrPair?) =
-            builtinFunctionsAsmGen.translateFunctioncallExpression(functionCall, signature, resultToStack)
+            builtinFunctionsAsmGen.translateFunctioncallExpression(functionCall, signature, resultToStack, resultRegister)
 
     internal fun translateFunctionCall(functionCall: FunctionCall) =
             functioncallAsmGen.translateFunctionCall(functionCall)
@@ -962,16 +963,14 @@ internal class AsmGen(private val program: Program,
                 }
             }
             is IdentifierReference -> {
-                val vardecl = (stmt.iterations as IdentifierReference).targetStatement(program.namespace) as VarDecl
+                val vardecl = (stmt.iterations as IdentifierReference).targetStatement(program) as VarDecl
                 val name = asmVariableName(stmt.iterations as IdentifierReference)
                 when(vardecl.datatype) {
                     DataType.UBYTE, DataType.BYTE -> {
-                        out("  lda  $name")
+                        repeatByteCountVar(name, repeatLabel, endLabel, stmt.body)
-                        repeatByteCountInA(null, repeatLabel, endLabel, stmt.body)
                     }
                     DataType.UWORD, DataType.WORD -> {
-                        out("  lda  $name |  ldy  $name+1")
+                        repeatWordCountVar(name, repeatLabel, endLabel, stmt.body)
-                        repeatWordCountInAY(null, repeatLabel, endLabel, stmt.body)
                     }
                     else -> throw AssemblyError("invalid loop variable datatype $vardecl")
                 }
@@ -1001,6 +1000,7 @@ internal class AsmGen(private val program: Program,
         if(constIterations==0)
             return
         // note: A/Y must have been loaded with the number of iterations already!
+        // TODO can be even more optimized by iterating over pages
         val counterVar = makeLabel("repeatcounter")
         out("""
                 sta  $counterVar
@@ -1035,22 +1035,54 @@ $counterVar    .word  0""")
         val counterVar = makeLabel("repeatcounter")
         if(constIterations==null)
             out("  beq  $endLabel")
-        out("""
+        out("  sta  $counterVar")
-            sta  $counterVar
+        out(repeatLabel)
-$repeatLabel""")
         translate(body)
         out("""
              dec  $counterVar
              bne  $repeatLabel
-             beq  $endLabel""")
+             beq  $endLabel  
-        if(constIterations!=null && constIterations>=16 && zeropage.available() > 0) {
-            // allocate count var on ZP
-            val zpAddr = zeropage.allocate(counterVar, DataType.UBYTE, body.position, errors)
-            out("""$counterVar = $zpAddr  ; auto zp UBYTE""")
-        } else {
-            out("""
 $counterVar    .byte  0""")
+        out(endLabel)
     }
+
+    private fun repeatByteCountVar(repeatCountVar: String, repeatLabel: String, endLabel: String, body: AnonymousScope) {
+        // note: cannot use original counter variable because it should retain its original value
+        val counterVar = makeLabel("repeatcounter")
+        out("  lda  $repeatCountVar |  beq  $endLabel |  sta  $counterVar")
+        out(repeatLabel)
+        translate(body)
+        out("  dec  $counterVar |  bne  $repeatLabel")
+        // inline countervar:
+        out("""
+                beq  $endLabel  
+$counterVar    .byte  0""")
+        out(endLabel)
+    }
+
+    private fun repeatWordCountVar(repeatCountVar: String, repeatLabel: String, endLabel: String, body: AnonymousScope) {
+        // TODO can be even more optimized by iterating over pages
+        // note: cannot use original counter variable because it should retain its original value
+        val counterVar = makeLabel("repeatcounter")
+        out("""
+            lda  $repeatCountVar
+            sta  $counterVar
+            ora  $repeatCountVar+1
+            beq  $endLabel
+            lda  $repeatCountVar+1
+            sta  $counterVar+1""")
+        out(repeatLabel)
+        translate(body)
+        out("""
+            lda  $counterVar
+            bne  +
+            dec  $counterVar+1
++           dec  $counterVar
+            lda  $counterVar
+            ora  $counterVar+1
+            bne  $repeatLabel
+            beq  $endLabel  
+$counterVar    .word  0""")
         out(endLabel)
     }
 
@@ -1239,17 +1271,20 @@ $label              nop""")
     }
 
     private fun getJumpTarget(jmp: Jump): String {
+        val ident = jmp.identifier
+        val label = jmp.generatedLabel
+        val addr = jmp.address
         return when {
-            jmp.identifier!=null -> {
+            ident!=null -> {
-                val target = jmp.identifier.targetStatement(program.namespace)
+                val target = ident.targetStatement(program)
-                val asmName = asmSymbolName(jmp.identifier)
+                val asmName = asmSymbolName(ident)
                 if(target is Label)
                     "_$asmName"  // prefix with underscore to jump to local label
                 else
                     asmName
             }
-            jmp.generatedLabel!=null -> jmp.generatedLabel
+            label!=null -> label
-            jmp.address!=null -> jmp.address.toHex()
+            addr!=null -> addr.toHex()
             else -> "????"
         }
     }
@@ -1264,12 +1299,12 @@ $label              nop""")
 
             when (returnType) {
                 in NumericDatatypes -> {
-                    assignExpressionToRegister(returnvalue, returnReg.registerOrPair)
+                    assignExpressionToRegister(returnvalue, returnReg.registerOrPair!!)
                 }
                 else -> {
                     // all else take its address and assign that also to AY register pair
                     val addrofValue = AddressOf(returnvalue as IdentifierReference, returnvalue.position)
-                    assignmentAsmGen.assignExpressionToRegister(addrofValue, returnReg.registerOrPair)
+                    assignmentAsmGen.assignExpressionToRegister(addrofValue, returnReg.registerOrPair!!)
                 }
             }
         }
@@ -1294,7 +1329,7 @@ $label              nop""")
         // sign extend signed byte on stack to signed word on stack
         when(valueDt) {
             DataType.UBYTE -> {
-                if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                if(compTarget.machine.cpu == CpuType.CPU65c02)
                     out("  stz  P8ESTACK_HI+1,x")
                 else
                     out("  lda  #0 |  sta  P8ESTACK_HI+1,x")
@@ -1308,7 +1343,7 @@ $label              nop""")
         // sign extend signed byte in a var to a full word in that variable
         when(valueDt) {
             DataType.UBYTE -> {
-                if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                if(compTarget.machine.cpu == CpuType.CPU65c02)
                     out("  stz  $asmvar+1")
                 else
                     out("  lda  #0 |  sta  $asmvar+1")
@@ -1328,7 +1363,7 @@ $label              nop""")
     internal fun isZpVar(scopedName: String): Boolean = scopedName in allocatedZeropageVariables
 
     internal fun isZpVar(variable: IdentifierReference): Boolean {
-        val vardecl = variable.targetVarDecl(program.namespace)!!
+        val vardecl = variable.targetVarDecl(program)!!
         return vardecl.makeScopedName(vardecl.name) in allocatedZeropageVariables
     }
 
@@ -1411,5 +1446,4 @@ $label              nop""")
         }
         return false
     }
-
 }

compiler/src/prog8/compiler/target/c64/codegen/BuiltinFunctionsAsmGen.kt

@@ -6,27 +6,24 @@ import prog8.ast.Program
 import prog8.ast.base.*
 import prog8.ast.expressions.*
 import prog8.ast.statements.*
+import prog8.ast.toHex
 import prog8.compiler.AssemblyError
-import prog8.compiler.target.c64.codegen.assignment.AsmAssignSource
+import prog8.compiler.functions.FSignature
-import prog8.compiler.target.c64.codegen.assignment.AsmAssignTarget
+import prog8.compiler.target.CpuType
-import prog8.compiler.target.c64.codegen.assignment.AsmAssignment
+import prog8.compiler.target.c64.codegen.assignment.*
-import prog8.compiler.target.c64.codegen.assignment.SourceStorageKind
-import prog8.compiler.target.c64.codegen.assignment.TargetStorageKind
 import prog8.compiler.target.subroutineFloatEvalResultVar2
-import prog8.compiler.toHex
-import prog8.functions.FSignature
 
-internal class BuiltinFunctionsAsmGen(private val program: Program, private val asmgen: AsmGen) {
+internal class BuiltinFunctionsAsmGen(private val program: Program, private val asmgen: AsmGen, private val assignAsmGen: AssignmentAsmGen) {
 
-    internal fun translateFunctioncallExpression(fcall: FunctionCall, func: FSignature, resultToStack: Boolean) {
+    internal fun translateFunctioncallExpression(fcall: FunctionCall, func: FSignature, resultToStack: Boolean, resultRegister: RegisterOrPair?) {
-        translateFunctioncall(fcall, func, discardResult = false, resultToStack = resultToStack)
+        translateFunctioncall(fcall, func, discardResult = false, resultToStack = resultToStack, resultRegister = resultRegister)
     }
 
     internal fun translateFunctioncallStatement(fcall: FunctionCallStatement, func: FSignature) {
-        translateFunctioncall(fcall, func, discardResult = true, resultToStack = false)
+        translateFunctioncall(fcall, func, discardResult = true, resultToStack = false, resultRegister = null)
     }
 
-    private fun translateFunctioncall(fcall: IFunctionCall, func: FSignature, discardResult: Boolean, resultToStack: Boolean) {
+    private fun translateFunctioncall(fcall: IFunctionCall, func: FSignature, discardResult: Boolean, resultToStack: Boolean, resultRegister: RegisterOrPair?) {
         if (discardResult && func.pure)
             return  // can just ignore the whole function call altogether
 
@@ -34,41 +31,46 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
             throw AssemblyError("cannot both discard the result AND put it onto stack")
 
         val sscope = (fcall as Node).definingSubroutine()
+
         when (func.name) {
-            "msb" -> funcMsb(fcall, resultToStack)
+            "msb" -> funcMsb(fcall, resultToStack, resultRegister)
-            "lsb" -> funcLsb(fcall, resultToStack)
+            "lsb" -> funcLsb(fcall, resultToStack, resultRegister)
-            "mkword" -> funcMkword(fcall, resultToStack)
+            "mkword" -> funcMkword(fcall, resultToStack, resultRegister)
-            "abs" -> funcAbs(fcall, func, resultToStack, sscope)
+            "abs" -> funcAbs(fcall, func, resultToStack, resultRegister, sscope)
             "swap" -> funcSwap(fcall)
-            "min", "max" -> funcMinMax(fcall, func, resultToStack)
+            "min", "max" -> funcMinMax(fcall, func, resultToStack, resultRegister, sscope)
-            "sum" -> funcSum(fcall, resultToStack)
+            "sum" -> funcSum(fcall, resultToStack, resultRegister, sscope)
-            "any", "all" -> funcAnyAll(fcall, func, resultToStack)
+            "any", "all" -> funcAnyAll(fcall, func, resultToStack, resultRegister, sscope)
             "sin8", "sin8u", "sin16", "sin16u",
-            "cos8", "cos8u", "cos16", "cos16u" -> funcSinCosInt(fcall, func, resultToStack, sscope)
+            "cos8", "cos8u", "cos16", "cos16u" -> funcSinCosInt(fcall, func, resultToStack, resultRegister, sscope)
-            "sgn" -> funcSgn(fcall, func, resultToStack, sscope)
+            "sgn" -> funcSgn(fcall, func, resultToStack, resultRegister, sscope)
             "sin", "cos", "tan", "atan",
             "ln", "log2", "sqrt", "rad",
             "deg", "round", "floor", "ceil",
-            "rndf" -> funcVariousFloatFuncs(fcall, func, resultToStack, sscope)
+            "rndf" -> funcVariousFloatFuncs(fcall, func, resultToStack, resultRegister, sscope)
-            "rnd", "rndw" -> funcRnd(func, resultToStack)
+            "rnd", "rndw" -> funcRnd(func, resultToStack, resultRegister, sscope)
-            "sqrt16" -> funcSqrt16(fcall, func, resultToStack, sscope)
+            "sqrt16" -> funcSqrt16(fcall, func, resultToStack, resultRegister, sscope)
             "rol" -> funcRol(fcall)
             "rol2" -> funcRol2(fcall)
             "ror" -> funcRor(fcall)
             "ror2" -> funcRor2(fcall)
             "sort" -> funcSort(fcall)
             "reverse" -> funcReverse(fcall)
-            "memory" -> funcMemory(fcall, discardResult, resultToStack)
+            "memory" -> funcMemory(fcall, discardResult, resultToStack, resultRegister)
+            "peekw" -> funcPeekW(fcall, resultToStack, resultRegister)
+            "peek" -> throw AssemblyError("peek() should have been replaced by @()")
+            "pokew" -> funcPokeW(fcall)
+            "poke" -> throw AssemblyError("poke() should have been replaced by @()")
             else -> TODO("missing asmgen for builtin func ${func.name}")
         }
     }
 
-    private fun funcMemory(fcall: IFunctionCall, discardResult: Boolean, resultToStack: Boolean) {
+    private fun funcMemory(fcall: IFunctionCall, discardResult: Boolean, resultToStack: Boolean, resultRegister: RegisterOrPair?) {
         if(discardResult || fcall !is FunctionCall)
             throw AssemblyError("should not discard result of memory allocation at $fcall")
         val scope = fcall.definingScope()
         val nameRef = fcall.args[0] as IdentifierReference
-        val name = (nameRef.targetVarDecl(program.namespace)!!.value as StringLiteralValue).value
+        val name = (nameRef.targetVarDecl(program)!!.value as StringLiteralValue).value
         val size = (fcall.args[1] as NumericLiteralValue).number.toInt()
 
         val existingSize = asmgen.slabs[name]
@@ -82,7 +84,7 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
             if(resultToStack)
                 AsmAssignTarget(TargetStorageKind.STACK, program, asmgen, DataType.UWORD, null)
             else
-                AsmAssignTarget.fromRegisters(RegisterOrPair.AY, null, program, asmgen)
+                AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.AY, null, program, asmgen)
         val assign = AsmAssignment(src, target, false, fcall.position)
         asmgen.translateNormalAssignment(assign)
 
@@ -92,29 +94,37 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
         asmgen.slabs[name] = size
     }
 
-    private fun funcSqrt16(fcall: IFunctionCall, func: FSignature, resultToStack: Boolean, scope: Subroutine?) {
+    private fun funcSqrt16(fcall: IFunctionCall, func: FSignature, resultToStack: Boolean, resultRegister: RegisterOrPair?, scope: Subroutine?) {
         translateArguments(fcall.args, func, scope)
         if(resultToStack)
             asmgen.out("  jsr  prog8_lib.func_sqrt16_stack")
-        else
+        else {
             asmgen.out("  jsr  prog8_lib.func_sqrt16_into_A")
+            assignAsmGen.assignRegisterByte(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, scope, program, asmgen), CpuRegister.A)
+        }
     }
 
-    private fun funcSinCosInt(fcall: IFunctionCall, func: FSignature, resultToStack: Boolean, scope: Subroutine?) {
+    private fun funcSinCosInt(fcall: IFunctionCall, func: FSignature, resultToStack: Boolean, resultRegister: RegisterOrPair?, scope: Subroutine?) {
         translateArguments(fcall.args, func, scope)
         if(resultToStack)
             asmgen.out("  jsr  prog8_lib.func_${func.name}_stack")
         else
             when(func.name) {
-                "sin8", "sin8u", "cos8", "cos8u" -> asmgen.out("  jsr  prog8_lib.func_${func.name}_into_A")
+                "sin8", "sin8u", "cos8", "cos8u" -> {
-                "sin16", "sin16u", "cos16", "cos16u" -> asmgen.out("  jsr  prog8_lib.func_${func.name}_into_AY")
+                    asmgen.out("  jsr  prog8_lib.func_${func.name}_into_A")
+                    assignAsmGen.assignRegisterByte(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, scope, program, asmgen), CpuRegister.A)
+                }
+                "sin16", "sin16u", "cos16", "cos16u" -> {
+                    asmgen.out("  jsr  prog8_lib.func_${func.name}_into_AY")
+                    assignAsmGen.assignRegisterpairWord(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.AY, scope, program, asmgen), RegisterOrPair.AY)
+                }
             }
     }
 
     private fun funcReverse(fcall: IFunctionCall) {
         val variable = fcall.args.single()
         if (variable is IdentifierReference) {
-            val decl = variable.targetVarDecl(program.namespace)!!
+            val decl = variable.targetVarDecl(program)!!
             val varName = asmgen.asmVariableName(variable)
             val numElements = decl.arraysize!!.constIndex()
             when (decl.datatype) {
@@ -153,7 +163,7 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
     private fun funcSort(fcall: IFunctionCall) {
         val variable = fcall.args.single()
         if (variable is IdentifierReference) {
-            val decl = variable.targetVarDecl(program.namespace)!!
+            val decl = variable.targetVarDecl(program)!!
             val varName = asmgen.asmVariableName(variable)
             val numElements = decl.arraysize!!.constIndex()
             when (decl.datatype) {
@@ -390,15 +400,17 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
         asmgen.assignExpressionToVariable(indexerExpr, "prog8_lib.${operation}_array_u${dt}._arg_index", DataType.UBYTE, null)
     }
 
-    private fun funcVariousFloatFuncs(fcall: IFunctionCall, func: FSignature, resultToStack: Boolean, scope: Subroutine?) {
+    private fun funcVariousFloatFuncs(fcall: IFunctionCall, func: FSignature, resultToStack: Boolean, resultRegister: RegisterOrPair?, scope: Subroutine?) {
         translateArguments(fcall.args, func, scope)
         if(resultToStack)
             asmgen.out("  jsr  floats.func_${func.name}_stack")
-        else
+        else {
             asmgen.out("  jsr  floats.func_${func.name}_fac1")
+            assignAsmGen.assignFAC1float(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.FAC1, scope, program, asmgen))
+        }
     }
 
-    private fun funcSgn(fcall: IFunctionCall, func: FSignature, resultToStack: Boolean, scope: Subroutine?) {
+    private fun funcSgn(fcall: IFunctionCall, func: FSignature, resultToStack: Boolean, resultRegister: RegisterOrPair?, scope: Subroutine?) {
         translateArguments(fcall.args, func, scope)
         val dt = fcall.args.single().inferType(program)
         if(resultToStack) {
@@ -419,10 +431,11 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
                 DataType.FLOAT -> asmgen.out("  jsr  floats.func_sign_f_into_A")
                 else -> throw AssemblyError("weird type $dt")
             }
+            assignAsmGen.assignRegisterByte(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, scope, program, asmgen), CpuRegister.A)
         }
     }
 
-    private fun funcAnyAll(fcall: IFunctionCall, function: FSignature, resultToStack: Boolean) {
+    private fun funcAnyAll(fcall: IFunctionCall, function: FSignature, resultToStack: Boolean, resultRegister: RegisterOrPair?, scope: Subroutine?) {
         outputAddressAndLenghtOfArray(fcall.args[0])
         val dt = fcall.args.single().inferType(program)
         if(resultToStack) {
@@ -439,10 +452,11 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
                 DataType.ARRAY_F -> asmgen.out("  jsr  floats.func_${function.name}_f_into_A")
                 else -> throw AssemblyError("weird type $dt")
             }
+            assignAsmGen.assignRegisterByte(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, scope, program, asmgen), CpuRegister.A)
         }
     }
 
-    private fun funcMinMax(fcall: IFunctionCall, function: FSignature, resultToStack: Boolean) {
+    private fun funcMinMax(fcall: IFunctionCall, function: FSignature, resultToStack: Boolean, resultRegister: RegisterOrPair?, scope: Subroutine?) {
         outputAddressAndLenghtOfArray(fcall.args[0])
         val dt = fcall.args.single().inferType(program)
         if(resultToStack) {
@@ -456,17 +470,32 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
             }
         } else {
             when (dt.typeOrElse(DataType.STRUCT)) {
-                DataType.ARRAY_UB, DataType.STR -> asmgen.out("  jsr  prog8_lib.func_${function.name}_ub_into_A")
+                DataType.ARRAY_UB, DataType.STR -> {
-                DataType.ARRAY_B -> asmgen.out("  jsr  prog8_lib.func_${function.name}_b_into_A")
+                    asmgen.out("  jsr  prog8_lib.func_${function.name}_ub_into_A")
-                DataType.ARRAY_UW -> asmgen.out("  jsr  prog8_lib.func_${function.name}_uw_into_AY")
+                    assignAsmGen.assignRegisterByte(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, scope, program, asmgen), CpuRegister.A)
-                DataType.ARRAY_W -> asmgen.out("  jsr  prog8_lib.func_${function.name}_w_into_AY")
+                }
-                DataType.ARRAY_F -> asmgen.out("  jsr  floats.func_${function.name}_f_fac1")
+                DataType.ARRAY_B -> {
+                    asmgen.out("  jsr  prog8_lib.func_${function.name}_b_into_A")
+                    assignAsmGen.assignRegisterByte(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, scope, program, asmgen), CpuRegister.A)
+                }
+                DataType.ARRAY_UW -> {
+                    asmgen.out("  jsr  prog8_lib.func_${function.name}_uw_into_AY")
+                    assignAsmGen.assignRegisterpairWord(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, scope, program, asmgen), RegisterOrPair.AY)
+                }
+                DataType.ARRAY_W -> {
+                    asmgen.out("  jsr  prog8_lib.func_${function.name}_w_into_AY")
+                    assignAsmGen.assignRegisterpairWord(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, scope, program, asmgen), RegisterOrPair.AY)
+                }
+                DataType.ARRAY_F -> {
+                    asmgen.out("  jsr  floats.func_${function.name}_f_fac1")
+                    assignAsmGen.assignFAC1float(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.FAC1, scope, program, asmgen))
+                }
                 else -> throw AssemblyError("weird type $dt")
             }
         }
     }
 
-    private fun funcSum(fcall: IFunctionCall, resultToStack: Boolean) {
+    private fun funcSum(fcall: IFunctionCall, resultToStack: Boolean, resultRegister: RegisterOrPair?, scope: Subroutine?) {
         outputAddressAndLenghtOfArray(fcall.args[0])
         val dt = fcall.args.single().inferType(program)
         if(resultToStack) {
@@ -480,11 +509,26 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
             }
         } else {
             when (dt.typeOrElse(DataType.STRUCT)) {
-                DataType.ARRAY_UB, DataType.STR -> asmgen.out("  jsr  prog8_lib.func_sum_ub_into_AY")
+                DataType.ARRAY_UB, DataType.STR -> {
-                DataType.ARRAY_B -> asmgen.out("  jsr  prog8_lib.func_sum_b_into_AY")
+                    asmgen.out("  jsr  prog8_lib.func_sum_ub_into_AY")
-                DataType.ARRAY_UW -> asmgen.out("  jsr  prog8_lib.func_sum_uw_into_AY")
+                    assignAsmGen.assignRegisterpairWord(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, scope, program, asmgen), RegisterOrPair.AY)
-                DataType.ARRAY_W -> asmgen.out("  jsr  prog8_lib.func_sum_w_into_AY")
+                }
-                DataType.ARRAY_F -> asmgen.out("  jsr  floats.func_sum_f_fac1")
+                DataType.ARRAY_B -> {
+                    asmgen.out("  jsr  prog8_lib.func_sum_b_into_AY")
+                    assignAsmGen.assignRegisterpairWord(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, scope, program, asmgen), RegisterOrPair.AY)
+                }
+                DataType.ARRAY_UW -> {
+                    asmgen.out("  jsr  prog8_lib.func_sum_uw_into_AY")
+                    assignAsmGen.assignRegisterpairWord(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, scope, program, asmgen), RegisterOrPair.AY)
+                }
+                DataType.ARRAY_W -> {
+                    asmgen.out("  jsr  prog8_lib.func_sum_w_into_AY")
+                    assignAsmGen.assignRegisterpairWord(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, scope, program, asmgen), RegisterOrPair.AY)
+                }
+                DataType.ARRAY_F -> {
+                    asmgen.out("  jsr  floats.func_sum_f_fac1")
+                    assignAsmGen.assignFAC1float(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.FAC1, scope, program, asmgen))
+                }
                 else -> throw AssemblyError("weird type $dt")
             }
         }
@@ -639,8 +683,8 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
     }
 
     private fun swapArrayValues(elementDt: DataType, arrayVarName1: String, indexValue1: NumericLiteralValue, arrayVarName2: String, indexValue2: NumericLiteralValue) {
-        val index1 = indexValue1.number.toInt() * elementDt.memorySize()
+        val index1 = indexValue1.number.toInt() * asmgen.compTarget.memorySize(elementDt)
-        val index2 = indexValue2.number.toInt() * elementDt.memorySize()
+        val index2 = indexValue2.number.toInt() * asmgen.compTarget.memorySize(elementDt)
         when(elementDt) {
             DataType.UBYTE, DataType.BYTE -> {
                 asmgen.out("""
@@ -753,7 +797,7 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
     }
 
     private fun swapArrayValues(elementDt: DataType, arrayVarName1: String, indexValue1: NumericLiteralValue, arrayVarName2: String, indexName2: IdentifierReference) {
-        val index1 = indexValue1.number.toInt() * elementDt.memorySize()
+        val index1 = indexValue1.number.toInt() * asmgen.compTarget.memorySize(elementDt)
         val idxAsmName2 = asmgen.asmVariableName(indexName2)
         when(elementDt) {
             DataType.UBYTE, DataType.BYTE -> {
@@ -812,7 +856,7 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
 
     private fun swapArrayValues(elementDt: DataType, arrayVarName1: String, indexName1: IdentifierReference, arrayVarName2: String, indexValue2: NumericLiteralValue) {
         val idxAsmName1 = asmgen.asmVariableName(indexName1)
-        val index2 = indexValue2.number.toInt() * elementDt.memorySize()
+        val index2 = indexValue2.number.toInt() * asmgen.compTarget.memorySize(elementDt)
         when(elementDt) {
             DataType.UBYTE, DataType.BYTE -> {
                 asmgen.out("""
@@ -868,7 +912,7 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
         }
     }
 
-    private fun funcAbs(fcall: IFunctionCall, func: FSignature, resultToStack: Boolean, scope: Subroutine?) {
+    private fun funcAbs(fcall: IFunctionCall, func: FSignature, resultToStack: Boolean, resultRegister: RegisterOrPair?, scope: Subroutine?) {
         translateArguments(fcall.args, func, scope)
         val dt = fcall.args.single().inferType(program).typeOrElse(DataType.STRUCT)
         if(resultToStack) {
@@ -880,40 +924,221 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
             }
         } else {
             when (dt) {
-                in ByteDatatypes -> asmgen.out("  jsr  prog8_lib.abs_b_into_A")
+                in ByteDatatypes -> {
-                in WordDatatypes -> asmgen.out("  jsr  prog8_lib.abs_w_into_AY")
+                    asmgen.out("  jsr  prog8_lib.abs_b_into_A")
-                DataType.FLOAT -> asmgen.out("  jsr  floats.abs_f_fac1")
+                    assignAsmGen.assignRegisterByte(AsmAssignTarget.fromRegisters(resultRegister!!, scope, program, asmgen), CpuRegister.A)
+                }
+                in WordDatatypes -> {
+                    asmgen.out("  jsr  prog8_lib.abs_w_into_AY")
+                    assignAsmGen.assignRegisterpairWord(AsmAssignTarget.fromRegisters(resultRegister!!, scope, program, asmgen), RegisterOrPair.AY)
+                }
+                DataType.FLOAT -> {
+                    asmgen.out("  jsr  floats.abs_f_fac1")
+                    assignAsmGen.assignRegisterpairWord(AsmAssignTarget.fromRegisters(resultRegister!!, scope, program, asmgen), RegisterOrPair.FAC1)
+                }
                 else -> throw AssemblyError("weird type")
             }
         }
     }
 
-    private fun funcRnd(func: FSignature, resultToStack: Boolean) {
+    private fun funcRnd(func: FSignature, resultToStack: Boolean, resultRegister: RegisterOrPair?, scope: Subroutine?) {
         when(func.name) {
             "rnd" -> {
                 if(resultToStack)
                     asmgen.out("  jsr  prog8_lib.func_rnd_stack")
-                else
+                else {
                     asmgen.out("  jsr  math.randbyte")
+                    assignAsmGen.assignRegisterByte(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.A, scope, program, asmgen), CpuRegister.A)
+                }
             }
             "rndw" -> {
                 if(resultToStack)
                     asmgen.out("  jsr  prog8_lib.func_rndw_stack")
-                else
+                else {
                     asmgen.out("  jsr  math.randword")
+                    assignAsmGen.assignRegisterpairWord(AsmAssignTarget.fromRegisters(resultRegister ?: RegisterOrPair.AY, scope, program, asmgen), RegisterOrPair.AY)
+                }
             }
             else -> throw AssemblyError("wrong func")
         }
     }
 
-    private fun funcMkword(fcall: IFunctionCall, resultToStack: Boolean) {
+    private fun funcPokeW(fcall: IFunctionCall) {
-        asmgen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.Y)      // msb
+        when(val addrExpr = fcall.args[0]) {
-        asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.A)      // lsb
+            is NumericLiteralValue -> {
-        if(resultToStack)
+                asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.AY)
-            asmgen.out("  sta  P8ESTACK_LO,x |  tya |  sta  P8ESTACK_HI,x |  dex")
+                val addr = addrExpr.number.toHex()
+                asmgen.out("  sta  $addr |  sty  ${addr}+1")
+                return
+            }
+            is IdentifierReference -> {
+                val varname = asmgen.asmVariableName(addrExpr)
+                if(asmgen.isZpVar(addrExpr)) {
+                    // pointervar is already in the zero page, no need to copy
+                    asmgen.saveRegisterLocal(CpuRegister.X, (fcall as Node).definingSubroutine()!!)
+                    asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.AX)
+                    if (asmgen.compTarget.machine.cpu == CpuType.CPU65c02) {
+                        asmgen.out("""
+                            sta  ($varname)
+                            txa
+                            ldy  #1
+                            sta  ($varname),y""")
+                    } else {
+                        asmgen.out("""
+                            ldy  #0
+                            sta  ($varname),y
+                            txa
+                            iny
+                            sta  ($varname),y""")
+                    }
+                    asmgen.restoreRegisterLocal(CpuRegister.X)
+                    return
+                }
+            }
+            is BinaryExpression -> {
+                if(addrExpr.operator=="+" && addrExpr.left is IdentifierReference && addrExpr.right is NumericLiteralValue) {
+                    asmgen.saveRegisterLocal(CpuRegister.X, (fcall as Node).definingSubroutine()!!)
+                    asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.AX)
+                    val varname = asmgen.asmVariableName(addrExpr.left as IdentifierReference)
+                    val index = (addrExpr.right as NumericLiteralValue).number.toHex()
+                    asmgen.out("""
+                        ldy  #$index
+                        sta  ($varname),y
+                        txa
+                        iny
+                        sta  ($varname),y""")
+                    asmgen.restoreRegisterLocal(CpuRegister.X)
+                    return
+                }
+            }
         }
 
-    private fun funcMsb(fcall: IFunctionCall, resultToStack: Boolean) {
+        asmgen.assignExpressionToVariable(fcall.args[0], "P8ZP_SCRATCH_W1", DataType.UWORD, null)
+        asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.AY)
+        asmgen.out("  jsr  prog8_lib.func_pokew")
+    }
+
+    private fun funcPeekW(fcall: IFunctionCall, resultToStack: Boolean, resultRegister: RegisterOrPair?) {
+        when(val addrExpr = fcall.args[0]) {
+            is NumericLiteralValue -> {
+                val addr = addrExpr.number.toHex()
+                asmgen.out("  lda  $addr |  ldy  ${addr}+1")
+            }
+            is IdentifierReference -> {
+                val varname = asmgen.asmVariableName(addrExpr)
+                if(asmgen.isZpVar(addrExpr)) {
+                    // pointervar is already in the zero page, no need to copy
+                    if (asmgen.compTarget.machine.cpu == CpuType.CPU65c02) {
+                        asmgen.out("""
+                            ldy  #1
+                            lda  ($varname),y
+                            tay
+                            lda  ($varname)""")
+                    } else {
+                        asmgen.out("""
+                            ldy  #0
+                            lda  ($varname),y
+                            pha
+                            iny
+                            lda  ($varname),y
+                            tay
+                            pla""")
+                    }
+                } else {
+                    asmgen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.AY)
+                    asmgen.out("  jsr  prog8_lib.func_peekw")
+                }
+            }
+            is BinaryExpression -> {
+                if(addrExpr.operator=="+" && addrExpr.left is IdentifierReference && addrExpr.right is NumericLiteralValue) {
+                    val varname = asmgen.asmVariableName(addrExpr.left as IdentifierReference)
+                    val index = (addrExpr.right as NumericLiteralValue).number.toHex()
+                    asmgen.out("""
+                        ldy  #$index
+                        lda  ($varname),y
+                        pha
+                        iny
+                        lda  ($varname),y
+                        tay
+                        pla""")
+                } else {
+                    asmgen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.AY)
+                    asmgen.out("  jsr  prog8_lib.func_peekw")
+                }
+            }
+            else -> {
+                asmgen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.AY)
+                asmgen.out("  jsr  prog8_lib.func_peekw")
+            }
+        }
+
+        if(resultToStack){
+            asmgen.out("  sta  P8ESTACK_LO,x |  tya |  sta  P8ESTACK_HI,x |  dex")
+        } else {
+            when(resultRegister ?: RegisterOrPair.AY) {
+                RegisterOrPair.AY -> {}
+                RegisterOrPair.AX -> asmgen.out("  sty  P8ZP_SCRATCH_REG |  ldx  P8ZP_SCRATCH_REG")
+                RegisterOrPair.XY -> asmgen.out("  tax")
+                in Cx16VirtualRegisters -> asmgen.out("  sta  cx16.${resultRegister.toString().toLowerCase()} |  sty  cx16.${resultRegister.toString().toLowerCase()}+1")
+                else -> throw AssemblyError("invalid reg")
+            }
+        }
+    }
+
+    private fun funcMkword(fcall: IFunctionCall, resultToStack: Boolean, resultRegister: RegisterOrPair?) {
+        if(resultToStack) {
+            asmgen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.Y)      // msb
+            asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.A)      // lsb
+            asmgen.out("  sta  P8ESTACK_LO,x |  tya |  sta  P8ESTACK_HI,x |  dex")
+        } else {
+            val reg = resultRegister ?: RegisterOrPair.AY
+            var needAsave = !(fcall.args[0] is DirectMemoryRead || fcall.args[0] is NumericLiteralValue || fcall.args[0] is IdentifierReference)
+            if(!needAsave) {
+                val mr0 = fcall.args[0] as? DirectMemoryRead
+                val mr1 = fcall.args[1] as? DirectMemoryRead
+                if (mr0 != null)
+                    needAsave = mr0.addressExpression !is NumericLiteralValue && mr0.addressExpression !is IdentifierReference
+                if (mr1 != null)
+                    needAsave = needAsave or (mr1.addressExpression !is NumericLiteralValue && mr1.addressExpression !is IdentifierReference)
+            }
+            when(reg) {
+                RegisterOrPair.AX -> {
+                    asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.A)      // lsb
+                    if(needAsave)
+                        asmgen.out("  pha")
+                    asmgen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.X)      // msb
+                    if(needAsave)
+                        asmgen.out("  pla")
+                }
+                RegisterOrPair.AY -> {
+                    asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.A)      // lsb
+                    if(needAsave)
+                        asmgen.out("  pha")
+                    asmgen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.Y)      // msb
+                    if(needAsave)
+                        asmgen.out("  pla")
+                }
+                RegisterOrPair.XY -> {
+                    asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.A)      // lsb
+                    if(needAsave)
+                        asmgen.out("  pha")
+                    asmgen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.Y)      // msb
+                    if(needAsave)
+                        asmgen.out("  pla")
+                    asmgen.out("  tax")
+                }
+                in Cx16VirtualRegisters -> {
+                    asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.A)      // lsb
+                    asmgen.out("  sta  cx16.${reg.toString().toLowerCase()}")
+                    asmgen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.A)      // msb
+                    asmgen.out("  sta  cx16.${reg.toString().toLowerCase()}+1")
+                }
+                else -> throw AssemblyError("invalid mkword target reg")
+            }
+        }
+    }
+
+    private fun funcMsb(fcall: IFunctionCall, resultToStack: Boolean, resultRegister: RegisterOrPair?) {
         val arg = fcall.args.single()
         if (arg.inferType(program).typeOrElse(DataType.STRUCT) !in WordDatatypes)
             throw AssemblyError("msb required word argument")
@@ -921,19 +1146,43 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
             throw AssemblyError("msb(const) should have been const-folded away")
         if (arg is IdentifierReference) {
             val sourceName = asmgen.asmVariableName(arg)
-            asmgen.out("  lda  $sourceName+1")
+            if(resultToStack) {
-            if (resultToStack)
+                asmgen.out("  lda  $sourceName+1 |  sta  P8ESTACK_LO,x |  dex")
-                asmgen.out("  sta  P8ESTACK_LO,x |  dex")
             } else {
+                when(resultRegister) {
+                    null, RegisterOrPair.A -> asmgen.out("  lda  $sourceName+1")
+                    RegisterOrPair.X -> asmgen.out("  ldx  $sourceName+1")
+                    RegisterOrPair.Y -> asmgen.out("  ldy  $sourceName+1")
+                    else -> throw AssemblyError("invalid reg")
+                }
+            }
+        } else {
+            if(resultToStack) {
                 asmgen.assignExpressionToRegister(fcall.args.single(), RegisterOrPair.AY)
-            if (resultToStack)
                 asmgen.out("  tya |  sta  P8ESTACK_LO,x |  dex")
-            else
+            } else {
+                when(resultRegister) {
+                    null, RegisterOrPair.A -> {
+                        asmgen.assignExpressionToRegister(fcall.args.single(), RegisterOrPair.AY)
                         asmgen.out("  tya")
                     }
+                    RegisterOrPair.X -> {
+                        asmgen.out("  pha")
+                        asmgen.assignExpressionToRegister(fcall.args.single(), RegisterOrPair.AX)
+                        asmgen.out("  pla")
+                    }
+                    RegisterOrPair.Y -> {
+                        asmgen.out("  pha")
+                        asmgen.assignExpressionToRegister(fcall.args.single(), RegisterOrPair.AY)
+                        asmgen.out("  pla")
+                    }
+                    else -> throw AssemblyError("invalid reg")
+                }
+            }
+        }
     }
 
-    private fun funcLsb(fcall: IFunctionCall, resultToStack: Boolean) {
+    private fun funcLsb(fcall: IFunctionCall, resultToStack: Boolean, resultRegister: RegisterOrPair?) {
         val arg = fcall.args.single()
         if (arg.inferType(program).typeOrElse(DataType.STRUCT) !in WordDatatypes)
             throw AssemblyError("lsb required word argument")
@@ -942,16 +1191,45 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
 
         if (arg is IdentifierReference) {
             val sourceName = asmgen.asmVariableName(arg)
-            asmgen.out("  lda  $sourceName")
+            if(resultToStack) {
-            if (resultToStack)
+                asmgen.out("  lda  $sourceName |  sta  P8ESTACK_LO,x |  dex")
-                asmgen.out("  sta  P8ESTACK_LO,x |  dex")
             } else {
+                when(resultRegister) {
+                    null, RegisterOrPair.A -> asmgen.out("  lda  $sourceName")
+                    RegisterOrPair.X -> asmgen.out("  ldx  $sourceName")
+                    RegisterOrPair.Y -> asmgen.out("  ldy  $sourceName")
+                    else -> throw AssemblyError("invalid reg")
+                }
+            }
+        } else {
+            if(resultToStack) {
                 asmgen.assignExpressionToRegister(fcall.args.single(), RegisterOrPair.AY)
                 // NOTE: we rely on the fact that the above assignment to AY, assigns the Lsb to A as the last instruction.
                 //       this is required because the compiler assumes the status bits are set according to what A is (lsb)
                 //       and will not generate another cmp when lsb() is directly used inside a comparison expression.
-            if (resultToStack)
                 asmgen.out("  sta  P8ESTACK_LO,x |  dex")
+            } else {
+                when(resultRegister) {
+                    null, RegisterOrPair.A -> {
+                        asmgen.assignExpressionToRegister(fcall.args.single(), RegisterOrPair.AY)
+                        // NOTE: we rely on the fact that the above assignment to AY, assigns the Lsb to A as the last instruction.
+                        //       this is required because the compiler assumes the status bits are set according to what A is (lsb)
+                        //       and will not generate another cmp when lsb() is directly used inside a comparison expression.
+                    }
+                    RegisterOrPair.X -> {
+                        asmgen.assignExpressionToRegister(fcall.args.single(), RegisterOrPair.XY)
+                        // NOTE: we rely on the fact that the above assignment to XY, assigns the Lsb to X as the last instruction.
+                        //       this is required because the compiler assumes the status bits are set according to what X is (lsb)
+                        //       and will not generate another cmp when lsb() is directly used inside a comparison expression.
+                    }
+                    RegisterOrPair.Y -> {
+                        asmgen.out("  pha")
+                        asmgen.assignExpressionToRegister(fcall.args.single(), RegisterOrPair.AY)
+                        asmgen.out("  tay |  pla |  cpy  #0")
+                    }
+                    else -> throw AssemblyError("invalid reg")
+                }
+            }
         }
     }
 
@@ -959,7 +1237,7 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
         // address in P8ZP_SCRATCH_W1,  number of elements in A
         arg as IdentifierReference
         val identifierName = asmgen.asmVariableName(arg)
-        val size = arg.targetVarDecl(program.namespace)!!.arraysize!!.constIndex()!!
+        val size = arg.targetVarDecl(program)!!.arraysize!!.constIndex()!!
         asmgen.out("""
                     lda  #<$identifierName
                     ldy  #>$identifierName

compiler/src/prog8/compiler/target/c64/codegen/ExpressionsAsmGen.kt

@@ -6,12 +6,11 @@ import prog8.ast.expressions.*
 import prog8.ast.statements.ArrayIndex
 import prog8.ast.statements.BuiltinFunctionStatementPlaceholder
 import prog8.ast.statements.Subroutine
+import prog8.ast.toHex
 import prog8.compiler.AssemblyError
-import prog8.compiler.target.CompilationTarget
+import prog8.compiler.functions.BuiltinFunctions
 import prog8.compiler.target.CpuType
 import prog8.compiler.target.subroutineFloatEvalResultVar1
-import prog8.compiler.toHex
-import prog8.functions.BuiltinFunctions
 import kotlin.math.absoluteValue
 
 internal class ExpressionsAsmGen(private val program: Program, private val asmgen: AsmGen) {
@@ -1327,10 +1326,10 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
     private fun translateFunctionCallResultOntoStack(call: FunctionCall) {
         // only for use in nested expression evaluation
 
-        val sub = call.target.targetStatement(program.namespace)
+        val sub = call.target.targetStatement(program)
         if(sub is BuiltinFunctionStatementPlaceholder) {
             val builtinFunc = BuiltinFunctions.getValue(sub.name)
-            asmgen.translateBuiltinFunctionCallExpression(call, builtinFunc, true)
+            asmgen.translateBuiltinFunctionCallExpression(call, builtinFunc, true, null)
         } else {
             sub as Subroutine
             asmgen.saveXbeforeCall(call)
@@ -1394,7 +1393,7 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
                 when(typecast.type) {
                     DataType.UBYTE, DataType.BYTE -> {}
                     DataType.UWORD, DataType.WORD -> {
-                        if(CompilationTarget.instance.machine.cpu==CpuType.CPU65c02)
+                        if(asmgen.compTarget.machine.cpu==CpuType.CPU65c02)
                             asmgen.out("  stz  P8ESTACK_HI+1,x")
                         else
                             asmgen.out("  lda  #0  |  sta  P8ESTACK_HI+1,x")
@@ -1460,7 +1459,7 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
 
         fun assignViaExprEval() {
             asmgen.assignExpressionToVariable(expr.addressExpression, asmgen.asmVariableName("P8ZP_SCRATCH_W2"), DataType.UWORD, null)
-            if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02) {
+            if (asmgen.compTarget.machine.cpu == CpuType.CPU65c02) {
                 if (pushResultOnEstack) {
                     asmgen.out("  lda  (P8ZP_SCRATCH_W2) |  dex |  sta  P8ESTACK_LO+1,x")
                 } else {
@@ -1674,7 +1673,7 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
                         }
                         DataType.UWORD -> {
                             if(amount>=16) {
-                                if(CompilationTarget.instance.machine.cpu==CpuType.CPU65c02)
+                                if(asmgen.compTarget.machine.cpu==CpuType.CPU65c02)
                                     asmgen.out("  stz  P8ESTACK_LO+1,x |  stz  P8ESTACK_HI+1,x")
                                 else
                                     asmgen.out("  lda  #0 |  sta  P8ESTACK_LO+1,x |  sta  P8ESTACK_HI+1,x")
@@ -1814,7 +1813,7 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
                             DataType.UBYTE -> asmgen.out("  lsr  P8ESTACK_LO+1,x")
                             DataType.BYTE -> asmgen.out("  asl  P8ESTACK_LO+1,x |  ror  P8ESTACK_LO+1,x")
                             DataType.UWORD -> asmgen.out("  lsr  P8ESTACK_HI+1,x |  ror  P8ESTACK_LO+1,x")
-                            DataType.WORD -> asmgen.out("  asl  P8ESTACK_HI+1,x |  ror  P8ESTACK_HI+1,x |  ror  P8ESTACK_LO+1,x")
+                            DataType.WORD -> asmgen.out("  lda  P8ESTACK_HI+1,x |  asl  a |  ror  P8ESTACK_HI+1,x |  ror  P8ESTACK_LO+1,x")
                             else -> throw AssemblyError("wrong dt")
                         }
                         return
@@ -1889,7 +1888,7 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
         val elementDt = elementIDt.typeOrElse(DataType.STRUCT)
         val arrayVarName = asmgen.asmVariableName(arrayExpr.arrayvar)
         if(arrayExpr.indexer.indexNum!=null) {
-            val indexValue = arrayExpr.indexer.constIndex()!! * elementDt.memorySize()
+            val indexValue = arrayExpr.indexer.constIndex()!! * asmgen.compTarget.memorySize(elementDt)
             when(elementDt) {
                 in ByteDatatypes -> {
                     asmgen.out("  lda  $arrayVarName+$indexValue |  sta  P8ESTACK_LO,x |  dex")

compiler/src/prog8/compiler/target/c64/codegen/ForLoopsAsmGen.kt

@@ -7,8 +7,8 @@ import prog8.ast.base.RegisterOrPair
 import prog8.ast.expressions.IdentifierReference
 import prog8.ast.expressions.RangeExpr
 import prog8.ast.statements.ForLoop
+import prog8.ast.toHex
 import prog8.compiler.AssemblyError
-import prog8.compiler.toHex
 import kotlin.math.absoluteValue
 
 internal class ForLoopsAsmGen(private val program: Program, private val asmgen: AsmGen) {
@@ -239,7 +239,7 @@ $endLabel""")
         val endLabel = asmgen.makeLabel("for_end")
         asmgen.loopEndLabels.push(endLabel)
         val iterableName = asmgen.asmVariableName(ident)
-        val decl = ident.targetVarDecl(program.namespace)!!
+        val decl = ident.targetVarDecl(program)!!
         when(iterableDt) {
             DataType.STR -> {
                 asmgen.out("""
@@ -369,7 +369,7 @@ $loopLabel""")
                         throw AssemblyError("step 0, 1 and -1 should have been handled specifically  $stmt")
                     }
                     2 -> {
-                        if(range.last==255) {
+                        if(range.last==255 || range.last==254) {
                             asmgen.out("""
                                 inc  $varname
                                 beq  $endLabel
@@ -377,12 +377,11 @@ $loopLabel""")
                                 bne  $loopLabel""")
                         } else {
                             asmgen.out("""
+                                inc  $varname
+                                inc  $varname
                                 lda  $varname
-                                cmp  #${range.last}
+                                cmp  #${range.last+2}
-                                beq  $endLabel
+                                bne  $loopLabel""")
-                                inc  $varname
-                                inc  $varname
-                                jmp  $loopLabel""")
                         }
                     }
                     -2 -> {
@@ -399,12 +398,11 @@ $loopLabel""")
                                 dec  $varname
                                 bne  $loopLabel""")
                             else -> asmgen.out("""
+                                dec  $varname
+                                dec  $varname
                                 lda  $varname
-                                cmp  #${range.last}
+                                cmp  #${range.last-2}
-                                beq  $endLabel
+                                bne  $loopLabel""")
-                                dec  $varname
-                                dec  $varname
-                                jmp  $loopLabel""")
                         }
                     }
                     else -> {
@@ -480,11 +478,10 @@ $loopLabel""")
 $endLabel""")
         } else {
             asmgen.out("""
-                lda  $varname
-                cmp  #${range.last}
-                beq  $endLabel
                 inc  $varname
-                jmp  $loopLabel
+                lda  $varname
+                cmp  #${range.last+1}
+                bne  $loopLabel
 $endLabel""")
         }
         asmgen.loopEndLabels.pop()
@@ -512,16 +509,15 @@ $endLabel""")
             1 -> {
                 asmgen.out("""
                     dec  $varname
-                    jmp  $loopLabel
+                    bne  $loopLabel
 $endLabel""")
             }
             else -> {
                 asmgen.out("""
-                    lda  $varname
-                    cmp  #${range.last}
-                    beq  $endLabel
                     dec  $varname
-                    jmp  $loopLabel
+                    lda  $varname
+                    cmp  #${range.last-1}
+                    bne  $loopLabel
 $endLabel""")
             }
         }
@@ -546,7 +542,6 @@ $loopLabel""")
             bne  +
             lda  $varname+1
             cmp  #>${range.last}
-            bne  +
             beq  $endLabel
 +           inc  $varname
             bne  $loopLabel
@@ -574,7 +569,6 @@ $loopLabel""")
             bne  +
             lda  $varname+1
             cmp  #>${range.last}
-            bne  +
             beq  $endLabel
 +           lda  $varname
             bne  +

compiler/src/prog8/compiler/target/c64/codegen/FunctionCallAsmGen.kt

@@ -7,9 +7,11 @@ import prog8.ast.base.*
 import prog8.ast.expressions.*
 import prog8.ast.statements.*
 import prog8.compiler.AssemblyError
-import prog8.compiler.target.CompilationTarget
 import prog8.compiler.target.CpuType
-import prog8.compiler.target.c64.codegen.assignment.*
+import prog8.compiler.target.c64.codegen.assignment.AsmAssignSource
+import prog8.compiler.target.c64.codegen.assignment.AsmAssignTarget
+import prog8.compiler.target.c64.codegen.assignment.AsmAssignment
+import prog8.compiler.target.c64.codegen.assignment.TargetStorageKind
 
 
 internal class FunctionCallAsmGen(private val program: Program, private val asmgen: AsmGen) {
@@ -22,7 +24,7 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
     }
 
     internal fun saveXbeforeCall(stmt: IFunctionCall) {
-        val sub = stmt.target.targetSubroutine(program.namespace) ?: throw AssemblyError("undefined subroutine ${stmt.target}")
+        val sub = stmt.target.targetSubroutine(program) ?: throw AssemblyError("undefined subroutine ${stmt.target}")
         if(sub.shouldSaveX()) {
             val regSaveOnStack = sub.asmAddress==null       // rom-routines don't require registers to be saved on stack, normal subroutines do because they can contain nested calls
             val (keepAonEntry: Boolean, keepAonReturn: Boolean) = sub.shouldKeepA()
@@ -34,7 +36,7 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
     }
 
     internal fun restoreXafterCall(stmt: IFunctionCall) {
-        val sub = stmt.target.targetSubroutine(program.namespace) ?: throw AssemblyError("undefined subroutine ${stmt.target}")
+        val sub = stmt.target.targetSubroutine(program) ?: throw AssemblyError("undefined subroutine ${stmt.target}")
         if(sub.shouldSaveX()) {
             val regSaveOnStack = sub.asmAddress==null       // rom-routines don't require registers to be saved on stack, normal subroutines do because they can contain nested calls
             val (keepAonEntry: Boolean, keepAonReturn: Boolean) = sub.shouldKeepA()
@@ -52,9 +54,10 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
         // NOTE: does NOT output code to save/restore the X register for this call! Every caller should deal with this in their own way!!
         //       (you can use subroutine.shouldSaveX() and saveX()/restoreX() routines as a help for this)
 
-        val sub = stmt.target.targetSubroutine(program.namespace) ?: throw AssemblyError("undefined subroutine ${stmt.target}")
+        val sub = stmt.target.targetSubroutine(program) ?: throw AssemblyError("undefined subroutine ${stmt.target}")
         val subName = asmgen.asmSymbolName(stmt.target)
         if(stmt.args.isNotEmpty()) {
+
             if(sub.asmParameterRegisters.isEmpty()) {
                 // via variables
                 for(arg in sub.parameters.withIndex().zip(stmt.args)) {
@@ -66,16 +69,31 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
                     // just a single parameter, no risk of clobbering registers
                     argumentViaRegister(sub, IndexedValue(0, sub.parameters.single()), stmt.args[0])
                 } else {
+
+                    fun isNoClobberRisk(expr: Expression): Boolean {
+                        if(expr is AddressOf ||
+                                expr is NumericLiteralValue ||
+                                expr is StringLiteralValue ||
+                                expr is ArrayLiteralValue ||
+                                expr is IdentifierReference)
+                            return true
+
+                        if(expr is FunctionCall) {
+                            if(expr.target.nameInSource==listOf("lsb") || expr.target.nameInSource==listOf("msb"))
+                                return isNoClobberRisk(expr.args[0])
+                            if(expr.target.nameInSource==listOf("mkword"))
+                                return isNoClobberRisk(expr.args[0]) && isNoClobberRisk(expr.args[1])
+                        }
+
+                        return false
+                    }
+
                     when {
-                        stmt.args.all {it is AddressOf ||
+                        stmt.args.all {isNoClobberRisk(it)} -> {
-                                it is NumericLiteralValue ||
-                                it is StringLiteralValue ||
-                                it is ArrayLiteralValue ||
-                                it is IdentifierReference} -> {
                             // There's no risk of clobbering for these simple argument types. Optimize the register loading directly from these values.
                             val argsInfo = sub.parameters.withIndex().zip(stmt.args).zip(sub.asmParameterRegisters)
-                            val (vregsArgsInfo, otherRegsArgsInfo) = argsInfo.partition { it.second.registerOrPair in Cx16VirtualRegisters }
+                            val (cx16virtualRegsArgsInfo, otherRegsArgsInfo) = argsInfo.partition { it.second.registerOrPair in Cx16VirtualRegisters }
-                            for(arg in vregsArgsInfo)
+                            for(arg in cx16virtualRegsArgsInfo)
                                 argumentViaRegister(sub, arg.first.first, arg.first.second)
                             for(arg in otherRegsArgsInfo)
                                 argumentViaRegister(sub, arg.first.first, arg.first.second)
@@ -150,7 +168,7 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
                                 lda  P8ESTACK_LO$plusIdxStr,x
                                 sta  cx16.${argi.value.second.registerOrPair.toString().toLowerCase()}
                             """)
-                            if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                            if (asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                                 asmgen.out("  stz  cx16.${argi.value.second.registerOrPair.toString().toLowerCase()}+1")
                             else
                                 asmgen.out("  lda  #0 |  sta  cx16.${argi.value.second.registerOrPair.toString().toLowerCase()}+1")
@@ -240,8 +258,7 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
             if(valueDt largerThan requiredDt)
                 throw AssemblyError("can only convert byte values to word param types")
         }
-        when {
+        if (statusflag!=null) {
-            statusflag!=null -> {
             if(requiredDt!=valueDt)
                 throw AssemblyError("for statusflag, byte value is required")
             if (statusflag == Statusflag.Pc) {
@@ -260,9 +277,9 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
                 beq  +
                 sec  
                 bcs  ++
-+           clc
+    +           clc
-+           pla
+    +           pla
-""")
+    """)
                     }
                     else -> {
                         asmgen.assignExpressionToRegister(value, RegisterOrPair.A)
@@ -270,14 +287,13 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
                                     beq  +
                                     sec
                                     bcs  ++
-+                               clc
+    +                               clc
-+""")
+    +""")
                     }
                 }
+            } else throw AssemblyError("can only use Carry as status flag parameter")
         }
-                else throw AssemblyError("can only use Carry as status flag parameter")
+        else {
-            }
-            else -> {
             // via register or register pair
             register!!
             if(requiredDt largerThan valueDt) {
@@ -286,8 +302,7 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
                 asmgen.assignExpressionToVariable(value, scratchVar, DataType.UBYTE, sub)
                 asmgen.signExtendVariableLsb(scratchVar, valueDt)
                 asmgen.assignVariableToRegister(scratchVar, register)
-                }
+            } else {
-                else {
                 val target: AsmAssignTarget =
                     if(parameter.value.type in ByteDatatypes && (register==RegisterOrPair.AX || register == RegisterOrPair.AY || register==RegisterOrPair.XY || register in Cx16VirtualRegisters))
                         AsmAssignTarget(TargetStorageKind.REGISTER, program, asmgen, parameter.value.type, sub, register = register)
@@ -307,7 +322,6 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
             }
         }
     }
-    }
 
     private fun isArgumentTypeCompatible(argType: DataType, paramType: DataType): Boolean {
         if(argType isAssignableTo paramType)

compiler/src/prog8/compiler/target/c64/codegen/PostIncrDecrAsmGen.kt

@@ -5,8 +5,8 @@ import prog8.ast.base.*
 import prog8.ast.expressions.IdentifierReference
 import prog8.ast.expressions.NumericLiteralValue
 import prog8.ast.statements.PostIncrDecr
+import prog8.ast.toHex
 import prog8.compiler.AssemblyError
-import prog8.compiler.toHex
 
 
 internal class PostIncrDecrAsmGen(private val program: Program, private val asmgen: AsmGen) {
@@ -67,7 +67,7 @@ internal class PostIncrDecrAsmGen(private val program: Program, private val asmg
                 val asmArrayvarname = asmgen.asmVariableName(targetArrayIdx.arrayvar)
                 val elementDt = targetArrayIdx.inferType(program).typeOrElse(DataType.STRUCT)
                 if(targetArrayIdx.indexer.indexNum!=null) {
-                    val indexValue = targetArrayIdx.indexer.constIndex()!! * elementDt.memorySize()
+                    val indexValue = targetArrayIdx.indexer.constIndex()!! * asmgen.compTarget.memorySize(elementDt)
                     when(elementDt) {
                         in ByteDatatypes -> asmgen.out(if (incr) "  inc  $asmArrayvarname+$indexValue" else "  dec  $asmArrayvarname+$indexValue")
                         in WordDatatypes -> {

compiler/src/prog8/compiler/target/c64/codegen/assignment/AsmAssignment.kt

@@ -5,6 +5,7 @@ import prog8.ast.base.*
 import prog8.ast.expressions.*
 import prog8.ast.statements.*
 import prog8.compiler.AssemblyError
+import prog8.compiler.target.ICompilationTarget
 import prog8.compiler.target.c64.codegen.AsmGen
 
 
@@ -104,7 +105,7 @@ internal class AsmAssignSource(val kind: SourceStorageKind,
                                private val variableAsmName: String? = null,
                                val array: ArrayIndexedExpression? = null,
                                val memory: DirectMemoryRead? = null,
-                               val register: CpuRegister? = null,
+                               val register: RegisterOrPair? = null,
                                val number: NumericLiteralValue? = null,
                                val expression: Expression? = null
 )
@@ -138,7 +139,15 @@ internal class AsmAssignSource(val kind: SourceStorageKind,
                 is ArrayLiteralValue -> throw AssemblyError("array literal value should not occur anymore for asm generation")
                 is IdentifierReference -> {
                     val dt = value.inferType(program).typeOrElse(DataType.STRUCT)
-                    AsmAssignSource(SourceStorageKind.VARIABLE, program, asmgen, dt, variableAsmName = asmgen.asmVariableName(value))
+                    val varName=asmgen.asmVariableName(value)
+                    // special case: "cx16.r[0-15]" are 16-bits virtual registers of the commander X16 system
+                    if(dt==DataType.UWORD && varName.toLowerCase().startsWith("cx16.r")) {
+                        val regStr = varName.toLowerCase().substring(5)
+                        val reg = RegisterOrPair.valueOf(regStr.toUpperCase())
+                        AsmAssignSource(SourceStorageKind.REGISTER, program, asmgen, dt, register = reg)
+                    } else {
+                        AsmAssignSource(SourceStorageKind.VARIABLE, program, asmgen, dt, variableAsmName = varName)
+                    }
                 }
                 is DirectMemoryRead -> {
                     AsmAssignSource(SourceStorageKind.MEMORY, program, asmgen, DataType.UBYTE, memory = value)
@@ -148,7 +157,7 @@ internal class AsmAssignSource(val kind: SourceStorageKind,
                     AsmAssignSource(SourceStorageKind.ARRAY, program, asmgen, dt, array = value)
                 }
                 is FunctionCall -> {
-                    when (val sub = value.target.targetStatement(program.namespace)) {
+                    when (val sub = value.target.targetStatement(program)) {
                         is Subroutine -> {
                             val returnType = sub.returntypes.zip(sub.asmReturnvaluesRegisters).firstOrNull { rr -> rr.second.registerOrPair != null || rr.second.statusflag!=null }?.first
                                     ?: throw AssemblyError("can't translate zero return values in assignment")
@@ -203,7 +212,7 @@ internal class AsmAssignment(val source: AsmAssignSource,
     init {
         if(target.register !in setOf(RegisterOrPair.XY, RegisterOrPair.AX, RegisterOrPair.AY))
             require(source.datatype != DataType.STRUCT) { "must not be placeholder datatype" }
-            require(source.datatype.memorySize() <= target.datatype.memorySize()) {
+            require(ICompilationTarget.instance.memorySize(source.datatype) <= ICompilationTarget.instance.memorySize(target.datatype)) {
                 "source storage size must be less or equal to target datatype storage size"
             }
     }

compiler/src/prog8/compiler/target/c64/codegen/assignment/AssignmentAsmGen.kt

@@ -4,17 +4,17 @@ import prog8.ast.Program
 import prog8.ast.base.*
 import prog8.ast.expressions.*
 import prog8.ast.statements.*
+import prog8.ast.toHex
 import prog8.compiler.AssemblyError
-import prog8.compiler.target.CompilationTarget
+import prog8.compiler.functions.BuiltinFunctions
+import prog8.compiler.functions.builtinFunctionReturnType
 import prog8.compiler.target.CpuType
 import prog8.compiler.target.c64.codegen.AsmGen
 import prog8.compiler.target.c64.codegen.ExpressionsAsmGen
-import prog8.compiler.toHex
-import prog8.functions.BuiltinFunctions
-import prog8.functions.builtinFunctionReturnType
 
 
-internal class AssignmentAsmGen(private val program: Program, private val asmgen: AsmGen, private val exprAsmgen: ExpressionsAsmGen) {
+internal class AssignmentAsmGen(private val program: Program, private val asmgen: AsmGen,
+                                private val exprAsmgen: ExpressionsAsmGen) {
 
     private val augmentableAsmGen = AugmentableAssignmentAsmGen(program, this, exprAsmgen, asmgen)
 
@@ -66,7 +66,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                 val arrayVarName = asmgen.asmVariableName(value.arrayvar)
                 if (value.indexer.indexNum!=null) {
                     // constant array index value
-                    val indexValue = value.indexer.constIndex()!! * elementDt.memorySize()
+                    val indexValue = value.indexer.constIndex()!! * asmgen.compTarget.memorySize(elementDt)
                     when (elementDt) {
                         in ByteDatatypes -> {
                             asmgen.out("  lda  $arrayVarName+$indexValue")
@@ -114,7 +114,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
             SourceStorageKind.MEMORY -> {
                 fun assignViaExprEval(expression: Expression) {
                     assignExpressionToVariable(expression, asmgen.asmVariableName("P8ZP_SCRATCH_W2"), DataType.UWORD, assign.target.scope)
-                    if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                    if (asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                         asmgen.out("  lda  (P8ZP_SCRATCH_W2)")
                     else
                         asmgen.out("  ldy  #0 |  lda  (P8ZP_SCRATCH_W2),y")
@@ -143,7 +143,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
             SourceStorageKind.EXPRESSION -> {
                 when(val value = assign.source.expression!!) {
                     is AddressOf -> {
-                        val sourceName = value.identifier.firstStructVarName(program.namespace) ?: asmgen.asmVariableName(value.identifier)
+                        val sourceName = value.identifier.firstStructVarName(program) ?: asmgen.asmVariableName(value.identifier)
                         assignAddressOf(assign.target, sourceName)
                     }
                     is NumericLiteralValue -> throw AssemblyError("source kind should have been literalnumber")
@@ -152,7 +152,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                     is DirectMemoryRead -> throw AssemblyError("source kind should have been memory")
                     is TypecastExpression -> assignTypeCastedValue(assign.target, value.type, value.expression, value)
                     is FunctionCall -> {
-                        when (val sub = value.target.targetStatement(program.namespace)) {
+                        when (val sub = value.target.targetStatement(program)) {
                             is Subroutine -> {
                                 asmgen.saveXbeforeCall(value)
                                 asmgen.translateFunctionCall(value)
@@ -209,7 +209,9 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                             }
                             is BuiltinFunctionStatementPlaceholder -> {
                                 val signature = BuiltinFunctions.getValue(sub.name)
-                                asmgen.translateBuiltinFunctionCallExpression(value, signature, false)
+                                asmgen.translateBuiltinFunctionCallExpression(value, signature, false, assign.target.register)
+                                if(assign.target.register==null) {
+                                    // still need to assign the result to the target variable/etc.
                                     val returntype = builtinFunctionReturnType(sub.name, value.args, program)
                                     if(!returntype.isKnown)
                                         throw AssemblyError("unknown dt")
@@ -239,6 +241,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                                         else -> throw AssemblyError("weird result type")
                                     }
                                 }
+                            }
                             else -> {
                                 throw AssemblyError("weird func call")
                             }
@@ -260,7 +263,11 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                 }
             }
             SourceStorageKind.REGISTER -> {
-                assignRegisterByte(assign.target, assign.source.register!!)
+                when(assign.source.datatype) {
+                    DataType.UBYTE -> assignRegisterByte(assign.target, assign.source.register!!.asCpuRegister())
+                    DataType.UWORD -> assignRegisterpairWord(assign.target, assign.source.register!!)
+                    else -> throw AssemblyError("invalid register dt")
+                }
             }
             SourceStorageKind.STACK -> {
                 assignStackValue(assign.target)
@@ -312,7 +319,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
 
                     fun assignViaExprEval(addressExpression: Expression) {
                         asmgen.assignExpressionToVariable(addressExpression, asmgen.asmVariableName("P8ZP_SCRATCH_W2"), DataType.UWORD, null)
-                        if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                        if (asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                             asmgen.out("  lda  (P8ZP_SCRATCH_W2)")
                         else
                             asmgen.out("  ldy  #0 |  lda  (P8ZP_SCRATCH_W2),y")
@@ -466,7 +473,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                         asmgen.out("  lda  $sourceAsmVarName |  sta  $targetAsmVarName")
                     }
                     DataType.UWORD, DataType.WORD -> {
-                        if(CompilationTarget.instance.machine.cpu==CpuType.CPU65c02)
+                        if(asmgen.compTarget.machine.cpu==CpuType.CPU65c02)
                             asmgen.out("  lda  $sourceAsmVarName |  sta  $targetAsmVarName |  stz  $targetAsmVarName+1")
                         else
                             asmgen.out("  lda  $sourceAsmVarName |  sta  $targetAsmVarName |  lda  #0  |  sta  $targetAsmVarName+1")
@@ -489,7 +496,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                         asmgen.out("  lda  $sourceAsmVarName |  sta  $targetAsmVarName")
                     }
                     DataType.UWORD -> {
-                        if(CompilationTarget.instance.machine.cpu==CpuType.CPU65c02)
+                        if(asmgen.compTarget.machine.cpu==CpuType.CPU65c02)
                             asmgen.out("  lda  $sourceAsmVarName |  sta  $targetAsmVarName |  stz  $targetAsmVarName+1")
                         else
                             asmgen.out("  lda  $sourceAsmVarName |  sta  $targetAsmVarName |  lda  #0  |  sta  $targetAsmVarName+1")
@@ -585,7 +592,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                         asmgen.out("  st${regs.toString().toLowerCase()}  $targetAsmVarName")
                     }
                     DataType.UWORD, DataType.WORD -> {
-                        if(CompilationTarget.instance.machine.cpu==CpuType.CPU65c02)
+                        if(asmgen.compTarget.machine.cpu==CpuType.CPU65c02)
                             asmgen.out("  st${regs.toString().toLowerCase()}  $targetAsmVarName |  stz  $targetAsmVarName+1")
                         else
                             asmgen.out("  st${regs.toString().toLowerCase()}  $targetAsmVarName |  lda  #0  |  sta  $targetAsmVarName+1")
@@ -613,7 +620,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                         asmgen.out("  st${regs.toString().toLowerCase()}  $targetAsmVarName")
                     }
                     DataType.UWORD -> {
-                        if(CompilationTarget.instance.machine.cpu==CpuType.CPU65c02)
+                        if(asmgen.compTarget.machine.cpu==CpuType.CPU65c02)
                             asmgen.out("  st${regs.toString().toLowerCase()}  $targetAsmVarName |  stz  $targetAsmVarName+1")
                         else
                             asmgen.out("  st${regs.toString().toLowerCase()}  $targetAsmVarName |  lda  #0  |  sta  $targetAsmVarName+1")
@@ -755,7 +762,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
             }
             TargetStorageKind.ARRAY -> {
                 if(target.constArrayIndexValue!=null) {
-                    val scaledIdx = target.constArrayIndexValue!! * target.datatype.memorySize()
+                    val scaledIdx = target.constArrayIndexValue!! * asmgen.compTarget.memorySize(target.datatype)
                     when(target.datatype) {
                         in ByteDatatypes -> {
                             asmgen.out(" inx | lda  P8ESTACK_LO,x  | sta  ${target.asmVarname}+$scaledIdx")
@@ -961,7 +968,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
             TargetStorageKind.ARRAY -> {
                 target.array!!
                 if(target.constArrayIndexValue!=null) {
-                    val scaledIdx = target.constArrayIndexValue!! * target.datatype.memorySize()
+                    val scaledIdx = target.constArrayIndexValue!! * asmgen.compTarget.memorySize(target.datatype)
                     when(target.datatype) {
                         in ByteDatatypes -> {
                             asmgen.out(" lda  $sourceName  | sta  ${target.asmVarname}+$scaledIdx")
@@ -1184,7 +1191,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
             }
             TargetStorageKind.ARRAY -> {
                 if (target.constArrayIndexValue!=null) {
-                    val scaledIdx = target.constArrayIndexValue!! * target.datatype.memorySize()
+                    val scaledIdx = target.constArrayIndexValue!! * asmgen.compTarget.memorySize(target.datatype)
                     asmgen.out(" lda  $sourceName  | sta  ${target.asmVarname}+$scaledIdx")
                 }
                 else {
@@ -1288,7 +1295,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
         when(wordtarget.kind) {
             TargetStorageKind.VARIABLE -> {
                 asmgen.out("  lda  $sourceName |  sta  ${wordtarget.asmVarname}")
-                if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                     asmgen.out("  stz  ${wordtarget.asmVarname}+1")
                 else
                     asmgen.out("  lda  #0 |  sta  ${wordtarget.asmVarname}+1")
@@ -1297,7 +1304,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                 if (wordtarget.constArrayIndexValue!=null) {
                     val scaledIdx = wordtarget.constArrayIndexValue!! * 2
                     asmgen.out("  lda  $sourceName  | sta  ${wordtarget.asmVarname}+$scaledIdx")
-                    if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                    if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                         asmgen.out("  stz  ${wordtarget.asmVarname}+$scaledIdx+1")
                     else
                         asmgen.out("  lda  #0  | sta  ${wordtarget.asmVarname}+$scaledIdx+1")
@@ -1322,7 +1329,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
             }
             TargetStorageKind.STACK -> {
                 asmgen.out("  lda  $sourceName |  sta  P8ESTACK_LO,x")
-                if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                     asmgen.out("  stz  P8ESTACK_HI,x |  dex")
                 else
                     asmgen.out("  lda  #0 |  sta  P8ESTACK_HI,x |  dex")
@@ -1431,7 +1438,15 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                     RegisterOrPair.AX -> asmgen.out("  sta  ${target.asmVarname} |  stx  ${target.asmVarname}+1")
                     RegisterOrPair.AY -> asmgen.out("  sta  ${target.asmVarname} |  sty  ${target.asmVarname}+1")
                     RegisterOrPair.XY -> asmgen.out("  stx  ${target.asmVarname} |  sty  ${target.asmVarname}+1")
-                    else -> throw AssemblyError("expected reg pair")
+                    in Cx16VirtualRegisters -> {
+                        val srcReg = asmgen.asmSymbolName(regs)
+                        asmgen.out("""
+                            lda  $srcReg
+                            sta  ${target.asmVarname}
+                            lda  $srcReg+1
+                            sta  ${target.asmVarname}+1""")
+                    }
+                    else -> throw AssemblyError("expected reg pair or cx16 virtual 16-bit register")
                 }
             }
             TargetStorageKind.ARRAY -> {
@@ -1441,11 +1456,20 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                         RegisterOrPair.AX -> asmgen.out("  sta  ${target.asmVarname}+$idx |  stx  ${target.asmVarname}+$idx+1")
                         RegisterOrPair.AY -> asmgen.out("  sta  ${target.asmVarname}+$idx |  sty  ${target.asmVarname}+$idx+1")
                         RegisterOrPair.XY -> asmgen.out("  stx  ${target.asmVarname}+$idx |  sty  ${target.asmVarname}+$idx+1")
-                        else -> throw AssemblyError("expected reg pair")
+                        in Cx16VirtualRegisters -> {
+                            val srcReg = asmgen.asmSymbolName(regs)
+                            asmgen.out("""
+                                lda  $srcReg
+                                sta  ${target.asmVarname}+$idx
+                                lda  $srcReg+1
+                                sta  ${target.asmVarname}+$idx+1""")
+                        }
+                        else -> throw AssemblyError("expected reg pair or cx16 virtual 16-bit register")
                     }
                 }
                 else {
-                    when(regs) {
+                    if (regs !in Cx16VirtualRegisters) {
+                        when (regs) {
                             RegisterOrPair.AX -> asmgen.out("  pha |  txa |  pha")
                             RegisterOrPair.AY -> asmgen.out("  pha |  tya |  pha")
                             RegisterOrPair.XY -> asmgen.out("  txa |  pha |  tya |  pha")
@@ -1458,6 +1482,16 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                             dey
                             pla
                             sta  ${target.asmVarname},y""")
+                    } else {
+                        val srcReg = asmgen.asmSymbolName(regs)
+                        asmgen.loadScaledArrayIndexIntoRegister(target.array!!, DataType.UWORD, CpuRegister.Y, true)
+                        asmgen.out("""
+                            lda  $srcReg+1
+                            sta  ${target.asmVarname},y
+                            dey
+                            lda  $srcReg
+                            sta  ${target.asmVarname},y""")
+                    }
                 }
             }
             TargetStorageKind.REGISTER -> {
@@ -1472,7 +1506,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                                     stx  cx16.${target.register.toString().toLowerCase()}+1
                                 """)
                         }
-                        else -> throw AssemblyError("expected reg pair")
+                        else -> throw AssemblyError("expected reg pair or cx16 virtual 16-bit register")
                     }
                     RegisterOrPair.AY -> when(target.register!!) {
                         RegisterOrPair.AY -> { }
@@ -1484,7 +1518,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                                     sty  cx16.${target.register.toString().toLowerCase()}+1
                                 """)
                         }
-                        else -> throw AssemblyError("expected reg pair")
+                        else -> throw AssemblyError("expected reg pair or cx16 virtual 16-bit register")
                     }
                     RegisterOrPair.XY -> when(target.register!!) {
                         RegisterOrPair.AY -> { asmgen.out("  txa") }
@@ -1496,16 +1530,40 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                                     sty  cx16.${target.register.toString().toLowerCase()}+1
                                 """)
                         }
-                        else -> throw AssemblyError("expected reg pair")
+                        else -> throw AssemblyError("expected reg pair or cx16 virtual 16-bit register")
                     }
-                    else -> throw AssemblyError("expected reg pair")
+                    in Cx16VirtualRegisters -> {
+                        val srcReg = asmgen.asmSymbolName(regs)
+                        if(regs!=target.register) {
+                            when(target.register) {
+                                RegisterOrPair.AX -> asmgen.out("  lda  $srcReg |  ldx  $srcReg+1")
+                                RegisterOrPair.AY -> asmgen.out("  lda  $srcReg |  ldy  $srcReg+1")
+                                RegisterOrPair.XY -> asmgen.out("  ldx  $srcReg |  ldy  $srcReg+1")
+                                in Cx16VirtualRegisters -> {
+                                    val targetReg = asmgen.asmSymbolName(target.register!!)
+                                    asmgen.out("  lda  $srcReg |  sta  $targetReg |  lda  $srcReg+1 |  sta  $targetReg+1")
+                                }
+                                else -> throw AssemblyError("invalid reg")
+                            }
+                        }
+                    }
+                    else -> throw AssemblyError("expected reg pair or cx16 virtual 16-bit register")
                 }
             }
             TargetStorageKind.STACK -> {
                 when(regs) {
                     RegisterOrPair.AY -> asmgen.out("  sta  P8ESTACK_LO,x |  sty  P8ESTACK_HI,x |  dex")
                     RegisterOrPair.AX, RegisterOrPair.XY -> throw AssemblyError("can't use X here")
-                    else -> throw AssemblyError("expected reg pair")
+                    in Cx16VirtualRegisters -> {
+                        val srcReg = asmgen.asmSymbolName(regs)
+                        asmgen.out("""
+                            lda  $srcReg
+                            sta  P8ESTACK_LO,x
+                            lda  $srcReg+1
+                            sta  P8ESTACK_HI,x
+                            dex""")
+                    }
+                    else -> throw AssemblyError("expected reg pair or cx16 virtual 16-bit register")
                 }
             }
             TargetStorageKind.MEMORY -> throw AssemblyError("can't store word into memory byte")
@@ -1513,7 +1571,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
     }
 
     private fun assignConstantWord(target: AsmAssignTarget, word: Int) {
-        if(word==0 && CompilationTarget.instance.machine.cpu == CpuType.CPU65c02) {
+        if(word==0 && asmgen.compTarget.machine.cpu == CpuType.CPU65c02) {
             // optimize setting zero value for this processor
             when(target.kind) {
                 TargetStorageKind.VARIABLE -> {
@@ -1608,7 +1666,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
     }
 
     private fun assignConstantByte(target: AsmAssignTarget, byte: Short) {
-        if(byte==0.toShort() && CompilationTarget.instance.machine.cpu == CpuType.CPU65c02) {
+        if(byte==0.toShort() && asmgen.compTarget.machine.cpu == CpuType.CPU65c02) {
             // optimize setting zero value for this cpu
             when(target.kind) {
                 TargetStorageKind.VARIABLE -> {
@@ -1678,7 +1736,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                 RegisterOrPair.FAC1, RegisterOrPair.FAC2 -> throw AssemblyError("expected typecasted byte to float")
                 in Cx16VirtualRegisters -> {
                     asmgen.out("  lda  #${byte.toHex()} |  sta  cx16.${target.register.toString().toLowerCase()}")
-                    if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                    if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                         asmgen.out("  stz  cx16.${target.register.toString().toLowerCase()}+1\n")
                     else
                         asmgen.out("  lda  #0 |  sta  cx16.${target.register.toString().toLowerCase()}+1\n")
@@ -1699,7 +1757,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
             // optimized case for float zero
             when(target.kind) {
                 TargetStorageKind.VARIABLE -> {
-                    if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                    if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                         asmgen.out("""
                             stz  ${target.asmVarname}
                             stz  ${target.asmVarname}+1
@@ -1719,8 +1777,8 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                 }
                 TargetStorageKind.ARRAY -> {
                     if (target.array!!.indexer.indexNum!=null) {
-                        val indexValue = target.array.indexer.constIndex()!! * DataType.FLOAT.memorySize()
+                        val indexValue = target.array.indexer.constIndex()!! * asmgen.compTarget.memorySize(DataType.FLOAT)
-                        if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                        if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                             asmgen.out("""
                                 stz  ${target.asmVarname}+$indexValue
                                 stz  ${target.asmVarname}+$indexValue+1
@@ -1784,7 +1842,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                 TargetStorageKind.ARRAY -> {
                     val arrayVarName = target.asmVarname
                     if (target.array!!.indexer.indexNum!=null) {
-                        val indexValue = target.array.indexer.constIndex()!! * DataType.FLOAT.memorySize()
+                        val indexValue = target.array.indexer.constIndex()!! * asmgen.compTarget.memorySize(DataType.FLOAT)
                         asmgen.out("""
                             lda  $constFloat
                             sta  $arrayVarName+$indexValue
@@ -1917,7 +1975,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
             when(wordtarget.kind) {
                 TargetStorageKind.VARIABLE -> {
                     asmgen.out("  lda  ${address.toHex()} |  sta  ${wordtarget.asmVarname}")
-                    if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                    if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                         asmgen.out("  stz  ${wordtarget.asmVarname}+1")
                     else
                         asmgen.out("  lda  #0 |  sta  ${wordtarget.asmVarname}+1")
@@ -1933,7 +1991,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                 }
                 TargetStorageKind.STACK -> {
                     asmgen.out("  lda  ${address.toHex()} |  sta  P8ESTACK_LO,x")
-                    if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                    if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                         asmgen.out("  stz  P8ESTACK_HI,x |  dex")
                     else
                         asmgen.out("  lda  #0 |  sta  P8ESTACK_HI,x |  dex")
@@ -1945,7 +2003,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                 TargetStorageKind.VARIABLE -> {
                     asmgen.loadByteFromPointerIntoA(identifier)
                     asmgen.out(" sta  ${wordtarget.asmVarname}")
-                    if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                    if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                         asmgen.out("  stz  ${wordtarget.asmVarname}+1")
                     else
                         asmgen.out("  lda  #0 |  sta  ${wordtarget.asmVarname}+1")
@@ -1965,7 +2023,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                 TargetStorageKind.STACK -> {
                     asmgen.loadByteFromPointerIntoA(identifier)
                     asmgen.out("  sta  P8ESTACK_LO,x")
-                    if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                    if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                         asmgen.out("  stz  P8ESTACK_HI,x |  dex")
                     else
                         asmgen.out("  lda  #0 |  sta  P8ESTACK_HI,x |  dex")
@@ -1983,7 +2041,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
             when(addressExpr) {
                 is NumericLiteralValue, is IdentifierReference -> {
                     assignExpressionToVariable(addressExpr, asmgen.asmVariableName("P8ZP_SCRATCH_W2"), DataType.UWORD, null)
-                    if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                    if (asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                         asmgen.out("  sta  (P8ZP_SCRATCH_W2)")
                     else
                         asmgen.out("  ldy  #0 |  sta  (P8ZP_SCRATCH_W2),y")
@@ -1993,7 +2051,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
                     asmgen.out("  pha")
                     assignExpressionToVariable(addressExpr, asmgen.asmVariableName("P8ZP_SCRATCH_W2"), DataType.UWORD, null)
                     asmgen.out("  pla")
-                    if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                    if (asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                         asmgen.out("  sta  (P8ZP_SCRATCH_W2)")
                     else
                         asmgen.out("  ldy  #0 |  sta  (P8ZP_SCRATCH_W2),y")
@@ -2003,9 +2061,9 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
 
         fun storeAIntoPointerVar(pointervar: IdentifierReference) {
             val sourceName = asmgen.asmVariableName(pointervar)
-            val vardecl = pointervar.targetVarDecl(program.namespace)!!
+            val vardecl = pointervar.targetVarDecl(program)!!
             val scopedName = vardecl.makeScopedName(vardecl.name)
-            if (CompilationTarget.instance.machine.cpu == CpuType.CPU65c02) {
+            if (asmgen.compTarget.machine.cpu == CpuType.CPU65c02) {
                 if (asmgen.isZpVar(scopedName)) {
                     // pointervar is already in the zero page, no need to copy
                     asmgen.out("  sta  ($sourceName)")

compiler/src/prog8/compiler/target/c64/codegen/assignment/AugmentableAssignmentAsmGen.kt

@@ -4,13 +4,12 @@ import prog8.ast.Program
 import prog8.ast.base.*
 import prog8.ast.expressions.*
 import prog8.ast.statements.Subroutine
+import prog8.ast.toHex
 import prog8.compiler.AssemblyError
-import prog8.compiler.target.CompilationTarget
 import prog8.compiler.target.CpuType
 import prog8.compiler.target.Cx16Target
 import prog8.compiler.target.c64.codegen.AsmGen
 import prog8.compiler.target.c64.codegen.ExpressionsAsmGen
-import prog8.compiler.toHex
 
 internal class AugmentableAssignmentAsmGen(private val program: Program,
                                            private val assignmentAsmGen: AssignmentAsmGen,
@@ -202,7 +201,7 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
                 with(target.array!!.indexer) {
                     when {
                         indexNum!=null -> {
-                            val targetVarName = "${target.asmVarname} + ${indexNum!!.number.toInt()*target.datatype.memorySize()}"
+                            val targetVarName = "${target.asmVarname} + ${indexNum!!.number.toInt()*asmgen.compTarget.memorySize(target.datatype)}"
                             when(target.datatype) {
                                 in ByteDatatypes -> {
                                     when {
@@ -632,7 +631,7 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
             }
             "<<" -> {
                 if(value>=8) {
-                    if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                    if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                         asmgen.out("  stz  $name")
                     else
                         asmgen.out("  lda  #0 |  sta  $name")
@@ -643,7 +642,7 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
                 if(value>0) {
                     if (dt == DataType.UBYTE) {
                         if(value>=8) {
-                            if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                            if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                                 asmgen.out("  stz  $name")
                             else
                                 asmgen.out("  lda  #0 |  sta  $name")
@@ -858,14 +857,14 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
             "<<" -> {
                 when {
                     value>=16 -> {
-                        if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                        if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                             asmgen.out("  stz  $name |  stz  $name+1")
                         else
                             asmgen.out("  lda  #0 |  sta  $name |  sta  $name+1")
                     }
                     value==8 -> {
                         asmgen.out("  lda  $name |  sta  $name+1")
-                        if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                        if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                             asmgen.out("  stz  $name")
                         else
                             asmgen.out("  lda  #0 |  sta  $name")
@@ -885,14 +884,14 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
                     if(dt==DataType.UWORD) {
                         when {
                             value>=16 -> {
-                                if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                                if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                                     asmgen.out("  stz  $name |  stz  $name+1")
                                 else
                                     asmgen.out("  lda  #0 |  sta  $name |  sta  $name+1")
                             }
                             value==8 -> {
                                 asmgen.out("  lda  $name+1 |  sta  $name")
-                                if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                                if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                                     asmgen.out("  stz  $name+1")
                                 else
                                     asmgen.out("  lda  #0 |  sta  $name+1")
@@ -941,13 +940,13 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
             "&", "and" -> {
                 when {
                     value == 0 -> {
-                        if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                        if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                             asmgen.out("  stz  $name |  stz  $name+1")
                         else
                             asmgen.out("  lda  #0 |  sta  $name |  sta  $name+1")
                     }
                     value and 255 == 0 -> {
-                        if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                        if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                             asmgen.out("  stz  $name")
                         else
                             asmgen.out("  lda  #0 |  sta  $name")
@@ -955,7 +954,7 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
                     }
                     value < 0x0100 -> {
                         asmgen.out("  lda  $name |  and  #$value |  sta  $name")
-                        if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                        if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                             asmgen.out("  stz  $name+1")
                         else
                             asmgen.out("  lda  #0 |  sta  $name+1")
@@ -986,7 +985,7 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
 
     private fun inplaceModification_word_variable_to_variable(name: String, dt: DataType, operator: String, ident: IdentifierReference) {
         val otherName = asmgen.asmVariableName(ident)
-        val valueDt = ident.targetVarDecl(program.namespace)!!.datatype
+        val valueDt = ident.targetVarDecl(program)!!.datatype
         when (valueDt) {
             in ByteDatatypes -> {
                 // the other variable is a BYTE type so optimize for that
@@ -1042,7 +1041,7 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
                     }
                     "*" -> {
                         asmgen.out("  lda  $otherName |  sta  P8ZP_SCRATCH_W1")
-                        if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                        if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                             asmgen.out("  stz  P8ZP_SCRATCH_W1+1")
                         else
                             asmgen.out("  lda  #0 |  sta  P8ZP_SCRATCH_W1+1")
@@ -1093,7 +1092,7 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
                     "&", "and" -> {
                         asmgen.out("  lda  $otherName |  and  $name |  sta  $name")
                         if(dt in WordDatatypes) {
-                            if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                            if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                                 asmgen.out("  stz  $name+1")
                             else
                                 asmgen.out("  lda  #0 |  sta  $name+1")
@@ -1352,7 +1351,7 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
                         asmgen.assignExpressionToRegister(value, RegisterOrPair.A)
                         asmgen.out("  and  $name |  sta  $name")
                         if(dt in WordDatatypes) {
-                            if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                            if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                                 asmgen.out("  stz  $name+1")
                             else
                                 asmgen.out("  lda  #0 |  sta  $name+1")
@@ -1467,7 +1466,7 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
     }
 
     private fun inplaceModification_float_variable_to_variable(name: String, operator: String, ident: IdentifierReference, scope: Subroutine) {
-        val valueDt = ident.targetVarDecl(program.namespace)!!.datatype
+        val valueDt = ident.targetVarDecl(program)!!.datatype
         if(valueDt != DataType.FLOAT)
             throw AssemblyError("float variable expected")
 
@@ -1475,7 +1474,7 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
         asmgen.saveRegisterLocal(CpuRegister.X, scope)
         when (operator) {
             "**" -> {
-                if(CompilationTarget.instance is Cx16Target) {
+                if(asmgen.compTarget is Cx16Target) {
                     // cx16 doesn't have FPWR() only FPWRT()
                     asmgen.out("""
                         lda  #<$name
@@ -1553,7 +1552,7 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
         asmgen.saveRegisterLocal(CpuRegister.X, scope)
         when (operator) {
             "**" -> {
-                if(CompilationTarget.instance is Cx16Target) {
+                if(asmgen.compTarget is Cx16Target) {
                     // cx16 doesn't have FPWR() only FPWRT()
                     asmgen.out("""
                         lda  #<$name
@@ -1645,7 +1644,7 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
                         DataType.UBYTE, DataType.BYTE -> {
                             when(target.kind) {
                                 TargetStorageKind.VARIABLE -> {
-                                    if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                                    if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                                         asmgen.out(" stz  ${target.asmVarname}+1")
                                     else
                                         asmgen.out(" lda  #0 |  sta  ${target.asmVarname}+1")
@@ -1655,7 +1654,7 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
                                     asmgen.out("  lda  #0 |  sta  ${target.asmVarname},y")
                                 }
                                 TargetStorageKind.STACK -> {
-                                    if(CompilationTarget.instance.machine.cpu == CpuType.CPU65c02)
+                                    if(asmgen.compTarget.machine.cpu == CpuType.CPU65c02)
                                         asmgen.out(" stz  P8ESTACK_HI+1,x")
                                     else
                                         asmgen.out(" lda  #0 |  sta  P8ESTACK_HI+1,x")

compiler/src/prog8/compiler/target/cx16/CX16MachineDefinition.kt

@@ -1,5 +1,6 @@
 package prog8.compiler.target.cx16
 
+import prog8.ast.IStringEncoding
 import prog8.ast.Program
 import prog8.compiler.*
 import prog8.compiler.target.CpuType
@@ -28,9 +29,15 @@ internal object CX16MachineDefinition: IMachineDefinition {
 
     override fun getFloat(num: Number) = C64MachineDefinition.Mflpt5.fromNumber(num)
 
-    override fun importLibs(compilerOptions: CompilationOptions, importer: ModuleImporter, program: Program) {
+    override fun importLibs(
+            compilerOptions: CompilationOptions,
+            importer: ModuleImporter,
+            program: Program,
+            encoder: IStringEncoding,
+            compilationTargetName: String)
+    {
         if (compilerOptions.launcher == LauncherType.BASIC || compilerOptions.output == OutputType.PRG)
-            importer.importLibraryModule(program, "syslib")
+            importer.importLibraryModule(program, "syslib", encoder, compilationTargetName)
     }
 
     override fun launchEmulator(programName: String) {

compiler/src/prog8/optimizer/BinExprSplitter.kt

@@ -1,13 +1,13 @@
 package prog8.optimizer
 
-import prog8.ast.INameScope
 import prog8.ast.Node
 import prog8.ast.Program
 import prog8.ast.expressions.*
-import prog8.ast.processing.AstWalker
-import prog8.ast.processing.IAstModification
 import prog8.ast.statements.AssignTarget
 import prog8.ast.statements.Assignment
+import prog8.ast.walk.AstWalker
+import prog8.ast.walk.IAstModification
+import prog8.compiler.target.ICompilationTarget
 
 
 internal class BinExprSplitter(private val program: Program) : AstWalker() {
@@ -53,7 +53,7 @@ X =      BinExpr                                    X   =   LeftExpr
 
 
  */
-            if(binExpr.operator in augmentAssignmentOperators && isSimpleTarget(assignment.target, program.namespace)) {
+            if(binExpr.operator in augmentAssignmentOperators && isSimpleTarget(assignment.target, program)) {
                 if(assignment.target isSameAs binExpr.left || assignment.target isSameAs binExpr.right)
                     return noModifications
 
@@ -78,9 +78,9 @@ X =      BinExpr                                    X   =   LeftExpr
     private fun isSimpleExpression(expr: Expression) =
             expr is IdentifierReference || expr is NumericLiteralValue || expr is AddressOf || expr is DirectMemoryRead || expr is StringLiteralValue || expr is ArrayLiteralValue || expr is RangeExpr
 
-    private fun isSimpleTarget(target: AssignTarget, namespace: INameScope) =
+    private fun isSimpleTarget(target: AssignTarget, program: Program) =
             if (target.identifier!=null || target.memoryAddress!=null)
-                target.isInRegularRAM(namespace)
+                ICompilationTarget.instance.isInRegularRAM(target, program)
             else
                 false
 

compiler/src/prog8/optimizer/CallGraph.kt

@@ -1,14 +1,17 @@
 package prog8.optimizer
 
-import prog8.ast.*
+import prog8.ast.INameScope
+import prog8.ast.Module
+import prog8.ast.Node
+import prog8.ast.Program
 import prog8.ast.base.DataType
-import prog8.ast.base.ErrorReporter
+import prog8.compiler.ErrorReporter
 import prog8.ast.base.ParentSentinel
 import prog8.ast.base.Position
 import prog8.ast.expressions.FunctionCall
 import prog8.ast.expressions.IdentifierReference
-import prog8.ast.processing.IAstVisitor
 import prog8.ast.statements.*
+import prog8.ast.walk.IAstVisitor
 import prog8.compiler.loadAsmIncludeFile
 
 private val alwaysKeepSubroutines = setOf(
@@ -89,7 +92,7 @@ class CallGraph(private val program: Program) : IAstVisitor {
 
     override fun visit(identifier: IdentifierReference) {
         // track symbol usage
-        val target = identifier.targetStatement(this.program.namespace)
+        val target = identifier.targetStatement(program)
         if (target != null) {
             addNodeAndParentScopes(target)
         }
@@ -126,7 +129,7 @@ class CallGraph(private val program: Program) : IAstVisitor {
     }
 
     override fun visit(functionCall: FunctionCall) {
-        val otherSub = functionCall.target.targetSubroutine(program.namespace)
+        val otherSub = functionCall.target.targetSubroutine(program)
         if (otherSub != null) {
             functionCall.definingSubroutine()?.let { thisSub ->
                 calls[thisSub] = calls.getValue(thisSub).plus(otherSub)
@@ -137,7 +140,7 @@ class CallGraph(private val program: Program) : IAstVisitor {
     }
 
     override fun visit(functionCallStatement: FunctionCallStatement) {
-        val otherSub = functionCallStatement.target.targetSubroutine(program.namespace)
+        val otherSub = functionCallStatement.target.targetSubroutine(program)
         if (otherSub != null) {
             functionCallStatement.definingSubroutine()?.let { thisSub ->
                 calls[thisSub] = calls.getValue(thisSub).plus(otherSub)
@@ -148,7 +151,7 @@ class CallGraph(private val program: Program) : IAstVisitor {
     }
 
     override fun visit(jump: Jump) {
-        val otherSub = jump.identifier?.targetSubroutine(program.namespace)
+        val otherSub = jump.identifier?.targetSubroutine(program)
         if (otherSub != null) {
             jump.definingSubroutine()?.let { thisSub ->
                 calls[thisSub] = calls.getValue(thisSub).plus(otherSub)

compiler/src/prog8/optimizer/ConstantFoldingOptimizer.kt

@@ -4,9 +4,12 @@ import prog8.ast.Node
 import prog8.ast.Program
 import prog8.ast.base.*
 import prog8.ast.expressions.*
-import prog8.ast.processing.AstWalker
+import prog8.ast.statements.Assignment
-import prog8.ast.processing.IAstModification
+import prog8.ast.statements.ForLoop
-import prog8.ast.statements.*
+import prog8.ast.statements.VarDecl
+import prog8.ast.walk.AstWalker
+import prog8.ast.walk.IAstModification
+import prog8.compiler.target.ICompilationTarget
 import kotlin.math.pow
 
 
@@ -221,7 +224,7 @@ internal class ConstantFoldingOptimizer(private val program: Program) : AstWalke
                     range.step
                 }
 
-            return RangeExpr(fromCast.valueOrZero(), toCast.valueOrZero(), newStep, range.position)
+            return RangeExpr(fromCast.valueOrZero(), toCast.valueOrZero(), newStep, ICompilationTarget.instance, range.position)
         }
 
         // adjust the datatype of a range expression in for loops to the loop variable.
@@ -230,7 +233,7 @@ internal class ConstantFoldingOptimizer(private val program: Program) : AstWalke
         val rangeTo = iterableRange.to as? NumericLiteralValue
         if(rangeFrom==null || rangeTo==null) return noModifications
 
-        val loopvar = forLoop.loopVar.targetVarDecl(program.namespace) ?: throw UndefinedSymbolError(forLoop.loopVar)
+        val loopvar = forLoop.loopVar.targetVarDecl(program) ?: throw UndefinedSymbolError(forLoop.loopVar)
 
         val stepLiteral = iterableRange.step as? NumericLiteralValue
         when(loopvar.datatype) {

compiler/src/prog8/optimizer/ConstantIdentifierReplacer.kt

@@ -4,13 +4,14 @@ import prog8.ast.Node
 import prog8.ast.Program
 import prog8.ast.base.*
 import prog8.ast.expressions.*
-import prog8.ast.processing.AstWalker
-import prog8.ast.processing.IAstModification
 import prog8.ast.statements.ArrayIndex
 import prog8.ast.statements.AssignTarget
 import prog8.ast.statements.ForLoop
 import prog8.ast.statements.VarDecl
-import prog8.compiler.target.CompilationTarget
+import prog8.ast.walk.AstWalker
+import prog8.ast.walk.IAstModification
+import prog8.compiler.ErrorReporter
+import prog8.compiler.target.ICompilationTarget
 
 // Fix up the literal value's type to match that of the vardecl
 internal class VarConstantValueTypeAdjuster(private val program: Program, private val errors: ErrorReporter) : AstWalker() {
@@ -191,7 +192,7 @@ internal class ConstantIdentifierReplacer(private val program: Program, private
                     if(rangeExpr==null && litval!=null) {
                         // arraysize initializer is a single int, and we know the size.
                         val fillvalue = litval.number.toDouble()
-                        if (fillvalue < CompilationTarget.instance.machine.FLOAT_MAX_NEGATIVE || fillvalue > CompilationTarget.instance.machine.FLOAT_MAX_POSITIVE)
+                        if (fillvalue < ICompilationTarget.instance.machine.FLOAT_MAX_NEGATIVE || fillvalue > ICompilationTarget.instance.machine.FLOAT_MAX_POSITIVE)
                             errors.err("float value overflow", litval.position)
                         else {
                             // create the array itself, filled with the fillvalue.

compiler/src/prog8/optimizer/ExpressionSimplifier.kt

@@ -2,11 +2,14 @@ package prog8.optimizer
 
 import prog8.ast.Node
 import prog8.ast.Program
-import prog8.ast.base.*
+import prog8.ast.base.DataType
+import prog8.ast.base.FatalAstException
+import prog8.ast.base.IntegerDatatypes
+import prog8.ast.base.NumericDatatypes
 import prog8.ast.expressions.*
-import prog8.ast.processing.AstWalker
-import prog8.ast.processing.IAstModification
 import prog8.ast.statements.Assignment
+import prog8.ast.walk.AstWalker
+import prog8.ast.walk.IAstModification
 import kotlin.math.abs
 import kotlin.math.log2
 import kotlin.math.pow

compiler/src/prog8/optimizer/Extensions.kt

@@ -1,7 +1,8 @@
 package prog8.optimizer
 
+import prog8.ast.IBuiltinFunctions
 import prog8.ast.Program
-import prog8.ast.base.ErrorReporter
+import prog8.compiler.ErrorReporter
 
 
 internal fun Program.constantFold(errors: ErrorReporter) {
@@ -38,8 +39,8 @@ internal fun Program.constantFold(errors: ErrorReporter) {
 }
 
 
-internal fun Program.optimizeStatements(errors: ErrorReporter): Int {
+internal fun Program.optimizeStatements(errors: ErrorReporter, functions: IBuiltinFunctions): Int {
-    val optimizer = StatementOptimizer(this, errors)
+    val optimizer = StatementOptimizer(this, errors, functions)
     optimizer.visit(this)
     val optimizationCount = optimizer.applyModifications()
 

compiler/src/prog8/optimizer/StatementOptimizer.kt

@@ -1,25 +1,27 @@
 package prog8.optimizer
 
+import prog8.ast.IBuiltinFunctions
 import prog8.ast.INameScope
 import prog8.ast.Node
 import prog8.ast.Program
 import prog8.ast.base.*
 import prog8.ast.expressions.*
-import prog8.ast.processing.AstWalker
-import prog8.ast.processing.IAstModification
-import prog8.ast.processing.IAstVisitor
 import prog8.ast.statements.*
-import prog8.compiler.target.CompilationTarget
+import prog8.ast.walk.AstWalker
-import prog8.functions.BuiltinFunctions
+import prog8.ast.walk.IAstModification
+import prog8.ast.walk.IAstVisitor
+import prog8.compiler.ErrorReporter
+import prog8.compiler.target.ICompilationTarget
 import kotlin.math.floor
 
 
 internal class StatementOptimizer(private val program: Program,
-                                  private val errors: ErrorReporter) : AstWalker() {
+                                  private val errors: ErrorReporter,
+                                  private val functions: IBuiltinFunctions
+) : AstWalker() {
 
     private val noModifications = emptyList<IAstModification>()
     private val callgraph = CallGraph(program)
-    private val pureBuiltinFunctions = BuiltinFunctions.filter { it.value.pure }
 
     override fun after(block: Block, parent: Node): Iterable<IAstModification> {
         if("force_output" !in block.options()) {
@@ -70,9 +72,9 @@ internal class StatementOptimizer(private val program: Program,
     }
 
     override fun after(functionCallStatement: FunctionCallStatement, parent: Node): Iterable<IAstModification> {
-        if(functionCallStatement.target.nameInSource.size==1 && functionCallStatement.target.nameInSource[0] in BuiltinFunctions) {
+        if(functionCallStatement.target.nameInSource.size==1 && functionCallStatement.target.nameInSource[0] in functions.names) {
             val functionName = functionCallStatement.target.nameInSource[0]
-            if (functionName in pureBuiltinFunctions) {
+            if (functionName in functions.purefunctionNames) {
                 errors.warn("statement has no effect (function return value is discarded)", functionCallStatement.position)
                 return listOf(IAstModification.Remove(functionCallStatement, functionCallStatement.definingScope()))
             }
@@ -89,12 +91,12 @@ internal class StatementOptimizer(private val program: Program,
                 arg as? IdentifierReference
             }
             if(stringVar!=null) {
-                val vardecl = stringVar.targetVarDecl(program.namespace)!!
+                val vardecl = stringVar.targetVarDecl(program)!!
                 val string = vardecl.value as? StringLiteralValue
                 if(string!=null) {
                     val pos = functionCallStatement.position
                     if (string.value.length == 1) {
-                        val firstCharEncoded = CompilationTarget.instance.encodeString(string.value, string.altEncoding)[0]
+                        val firstCharEncoded = ICompilationTarget.instance.encodeString(string.value, string.altEncoding)[0]
                         val chrout = FunctionCallStatement(
                                 IdentifierReference(listOf("c64", "CHROUT"), pos),
                                 mutableListOf(NumericLiteralValue(DataType.UBYTE, firstCharEncoded.toInt(), pos)),
@@ -102,7 +104,7 @@ internal class StatementOptimizer(private val program: Program,
                         )
                         return listOf(IAstModification.ReplaceNode(functionCallStatement, chrout, parent))
                     } else if (string.value.length == 2) {
-                        val firstTwoCharsEncoded = CompilationTarget.instance.encodeString(string.value.take(2), string.altEncoding)
+                        val firstTwoCharsEncoded = ICompilationTarget.instance.encodeString(string.value.take(2), string.altEncoding)
                         val chrout1 = FunctionCallStatement(
                                 IdentifierReference(listOf("c64", "CHROUT"), pos),
                                 mutableListOf(NumericLiteralValue(DataType.UBYTE, firstTwoCharsEncoded[0].toInt(), pos)),
@@ -123,7 +125,7 @@ internal class StatementOptimizer(private val program: Program,
         }
 
         // if the first instruction in the called subroutine is a return statement, remove the jump altogeter
-        val subroutine = functionCallStatement.target.targetSubroutine(program.namespace)
+        val subroutine = functionCallStatement.target.targetSubroutine(program)
         if(subroutine!=null) {
             val first = subroutine.statements.asSequence().filterNot { it is VarDecl || it is Directive }.firstOrNull()
             if(first is Return)
@@ -135,7 +137,7 @@ internal class StatementOptimizer(private val program: Program,
 
     override fun before(functionCall: FunctionCall, parent: Node): Iterable<IAstModification> {
         // if the first instruction in the called subroutine is a return statement with constant value, replace with the constant value
-        val subroutine = functionCall.target.targetSubroutine(program.namespace)
+        val subroutine = functionCall.target.targetSubroutine(program)
         if(subroutine!=null) {
             val first = subroutine.statements.asSequence().filterNot { it is VarDecl || it is Directive }.firstOrNull()
             if(first is Return && first.value!=null) {
@@ -203,14 +205,14 @@ internal class StatementOptimizer(private val program: Program,
                 return listOf(IAstModification.ReplaceNode(forLoop, scope, parent))
             }
         }
-        val iterable = (forLoop.iterable as? IdentifierReference)?.targetVarDecl(program.namespace)
+        val iterable = (forLoop.iterable as? IdentifierReference)?.targetVarDecl(program)
         if(iterable!=null) {
             if(iterable.datatype==DataType.STR) {
                 val sv = iterable.value as StringLiteralValue
                 val size = sv.value.length
                 if(size==1) {
                     // loop over string of length 1 -> just assign the single character
-                    val character = CompilationTarget.instance.encodeString(sv.value, sv.altEncoding)[0]
+                    val character = ICompilationTarget.instance.encodeString(sv.value, sv.altEncoding)[0]
                     val byte = NumericLiteralValue(DataType.UBYTE, character, iterable.position)
                     val scope = AnonymousScope(mutableListOf(), forLoop.position)
                     scope.statements.add(Assignment(AssignTarget(forLoop.loopVar, null, null, forLoop.position), byte, forLoop.position))
@@ -306,7 +308,7 @@ internal class StatementOptimizer(private val program: Program,
     override fun after(jump: Jump, parent: Node): Iterable<IAstModification> {
         // if the jump is to the next statement, remove the jump
         val scope = jump.definingScope()
-        val label = jump.identifier?.targetStatement(scope)
+        val label = jump.identifier?.targetStatement(program)
         if(label!=null && scope.statements.indexOf(label) == scope.statements.indexOf(jump)+1)
             return listOf(IAstModification.Remove(jump, jump.definingScope()))
 
@@ -390,7 +392,7 @@ internal class StatementOptimizer(private val program: Program,
                 // assignments of the form:  X = X <operator> <expr>
                 // remove assignments that have no effect (such as X=X+0)
                 // optimize/rewrite some other expressions
-                val vardeclDt = (assignment.target.identifier?.targetVarDecl(program.namespace))?.type
+                val vardeclDt = (assignment.target.identifier?.targetVarDecl(program))?.type
                 when (bexpr.operator) {
                     "+" -> {
                         if (rightCv == 0.0) {

compiler/src/prog8/optimizer/UnusedCodeRemover.kt

@@ -3,11 +3,15 @@ package prog8.optimizer
 import prog8.ast.INameScope
 import prog8.ast.Node
 import prog8.ast.Program
-import prog8.ast.base.ErrorReporter
+import prog8.compiler.ErrorReporter
-import prog8.ast.expressions.*
+import prog8.ast.expressions.BinaryExpression
-import prog8.ast.processing.AstWalker
+import prog8.ast.expressions.FunctionCall
-import prog8.ast.processing.IAstModification
+import prog8.ast.expressions.PrefixExpression
+import prog8.ast.expressions.TypecastExpression
 import prog8.ast.statements.*
+import prog8.ast.walk.AstWalker
+import prog8.ast.walk.IAstModification
+import prog8.compiler.target.ICompilationTarget
 
 
 internal class UnusedCodeRemover(private val program: Program, private val errors: ErrorReporter): AstWalker() {
@@ -92,7 +96,7 @@ internal class UnusedCodeRemover(private val program: Program, private val error
             val assign1 = stmtPairs[0] as? Assignment
             val assign2 = stmtPairs[1] as? Assignment
             if (assign1 != null && assign2 != null && !assign2.isAugmentable) {
-                if (assign1.target.isSameAs(assign2.target, program) && assign1.target.isInRegularRAM(program.namespace))  {
+                if (assign1.target.isSameAs(assign2.target, program) && ICompilationTarget.instance.isInRegularRAM(assign1.target, program))  {
                     if(assign2.target.identifier==null || !assign2.value.referencesIdentifier(*(assign2.target.identifier!!.nameInSource.toTypedArray())))
                         // only remove the second assignment if its value is a simple expression!
                         when(assign2.value) {

compiler/test/UnitTests.kt

@@ -5,12 +5,15 @@ import org.hamcrest.Matchers.closeTo
 import org.hamcrest.Matchers.equalTo
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.TestInstance
+import prog8.ast.IBuiltinFunctions
+import prog8.ast.Module
+import prog8.ast.Program
 import prog8.ast.base.*
 import prog8.ast.expressions.*
 import prog8.ast.statements.*
+import prog8.ast.toHex
 import prog8.compiler.*
 import prog8.compiler.target.C64Target
-import prog8.compiler.target.CompilationTarget
 import prog8.compiler.target.c64.C64MachineDefinition.C64Zeropage
 import prog8.compiler.target.c64.C64MachineDefinition.FLOAT_MAX_NEGATIVE
 import prog8.compiler.target.c64.C64MachineDefinition.FLOAT_MAX_POSITIVE
@@ -18,6 +21,7 @@ import prog8.compiler.target.c64.C64MachineDefinition.Mflpt5
 import prog8.compiler.target.c64.Petscii
 import prog8.compiler.target.cx16.CX16MachineDefinition
 import java.io.CharConversionException
+import java.nio.file.Path
 import kotlin.test.*
 
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
@@ -50,8 +54,8 @@ class TestCompiler {
         assertEquals("-\$c382", (-50050).toHex())
         assertEquals("-\$ffff", (-65535).toHex())
         assertEquals("-\$ffff", (-65535L).toHex())
-        assertFailsWith<CompilerException> { 65536.toHex()  }
+        assertFailsWith<IllegalArgumentException> { 65536.toHex()  }
-        assertFailsWith<CompilerException> { 65536L.toHex()  }
+        assertFailsWith<IllegalArgumentException> { 65536L.toHex()  }
     }
 
     @Test
@@ -401,74 +405,73 @@ class TestPetscii {
 
 
 class TestMemory {
+    private class DummyFunctions: IBuiltinFunctions {
+        override val names: Set<String> = emptySet()
+        override val purefunctionNames: Set<String> = emptySet()
+        override fun constValue(name: String, args: List<Expression>, position: Position): NumericLiteralValue? = null
+        override fun returnType(name: String, args: MutableList<Expression>) = InferredTypes.InferredType.unknown()
+    }
+
     @Test
     fun testInValidRamC64_memory_addresses() {
-        CompilationTarget.instance = C64Target
 
         var memexpr = NumericLiteralValue.optimalInteger(0x0000, Position.DUMMY)
         var target = AssignTarget(null, null, DirectMemoryWrite(memexpr, Position.DUMMY), Position.DUMMY)
-        var scope = AnonymousScope(mutableListOf(), Position.DUMMY)
+        val program = Program("test", mutableListOf(), DummyFunctions())
-        assertTrue(target.isInRegularRAM(scope))
+        assertTrue(C64Target.isInRegularRAM(target, program))
 
         memexpr = NumericLiteralValue.optimalInteger(0x1000, Position.DUMMY)
         target = AssignTarget(null, null, DirectMemoryWrite(memexpr, Position.DUMMY), Position.DUMMY)
-        scope = AnonymousScope(mutableListOf(), Position.DUMMY)
+        assertTrue(C64Target.isInRegularRAM(target, program))
-        assertTrue(target.isInRegularRAM(scope))
 
         memexpr = NumericLiteralValue.optimalInteger(0x9fff, Position.DUMMY)
         target = AssignTarget(null, null, DirectMemoryWrite(memexpr, Position.DUMMY), Position.DUMMY)
-        scope = AnonymousScope(mutableListOf(), Position.DUMMY)
+        assertTrue(C64Target.isInRegularRAM(target, program))
-        assertTrue(target.isInRegularRAM(scope))
 
         memexpr = NumericLiteralValue.optimalInteger(0xc000, Position.DUMMY)
         target = AssignTarget(null, null, DirectMemoryWrite(memexpr, Position.DUMMY), Position.DUMMY)
-        scope = AnonymousScope(mutableListOf(), Position.DUMMY)
+        assertTrue(C64Target.isInRegularRAM(target, program))
-        assertTrue(target.isInRegularRAM(scope))
 
         memexpr = NumericLiteralValue.optimalInteger(0xcfff, Position.DUMMY)
         target = AssignTarget(null, null, DirectMemoryWrite(memexpr, Position.DUMMY), Position.DUMMY)
-        scope = AnonymousScope(mutableListOf(), Position.DUMMY)
+        assertTrue(C64Target.isInRegularRAM(target, program))
-        assertTrue(target.isInRegularRAM(scope))
     }
 
     @Test
     fun testNotInValidRamC64_memory_addresses() {
-        CompilationTarget.instance = C64Target
 
         var memexpr = NumericLiteralValue.optimalInteger(0xa000, Position.DUMMY)
         var target = AssignTarget(null, null, DirectMemoryWrite(memexpr, Position.DUMMY), Position.DUMMY)
-        var scope = AnonymousScope(mutableListOf(), Position.DUMMY)
+        val program = Program("test", mutableListOf(), DummyFunctions())
-        assertFalse(target.isInRegularRAM(scope))
+        assertFalse(C64Target.isInRegularRAM(target, program))
 
         memexpr = NumericLiteralValue.optimalInteger(0xafff, Position.DUMMY)
         target = AssignTarget(null, null, DirectMemoryWrite(memexpr, Position.DUMMY), Position.DUMMY)
-        scope = AnonymousScope(mutableListOf(), Position.DUMMY)
+        assertFalse(C64Target.isInRegularRAM(target, program))
-        assertFalse(target.isInRegularRAM(scope))
 
         memexpr = NumericLiteralValue.optimalInteger(0xd000, Position.DUMMY)
         target = AssignTarget(null, null, DirectMemoryWrite(memexpr, Position.DUMMY), Position.DUMMY)
-        scope = AnonymousScope(mutableListOf(), Position.DUMMY)
+        assertFalse(C64Target.isInRegularRAM(target, program))
-        assertFalse(target.isInRegularRAM(scope))
 
         memexpr = NumericLiteralValue.optimalInteger(0xffff, Position.DUMMY)
         target = AssignTarget(null, null, DirectMemoryWrite(memexpr, Position.DUMMY), Position.DUMMY)
-        scope = AnonymousScope(mutableListOf(), Position.DUMMY)
+        assertFalse(C64Target.isInRegularRAM(target, program))
-        assertFalse(target.isInRegularRAM(scope))
     }
 
     @Test
     fun testInValidRamC64_memory_identifiers() {
-        CompilationTarget.instance = C64Target
         var target = createTestProgramForMemoryRefViaVar(0x1000, VarDeclType.VAR)
-        assertTrue(target.isInRegularRAM(target.definingScope()))
+        val program = Program("test", mutableListOf(), DummyFunctions())
+
+        assertTrue(C64Target.isInRegularRAM(target, program))
         target = createTestProgramForMemoryRefViaVar(0xd020, VarDeclType.VAR)
-        assertFalse(target.isInRegularRAM(target.definingScope()))
+        assertFalse(C64Target.isInRegularRAM(target, program))
         target = createTestProgramForMemoryRefViaVar(0x1000, VarDeclType.CONST)
-        assertTrue(target.isInRegularRAM(target.definingScope()))
+        assertTrue(C64Target.isInRegularRAM(target, program))
         target = createTestProgramForMemoryRefViaVar(0xd020, VarDeclType.CONST)
-        assertFalse(target.isInRegularRAM(target.definingScope()))
+        assertFalse(C64Target.isInRegularRAM(target, program))
         target = createTestProgramForMemoryRefViaVar(0x1000, VarDeclType.MEMORY)
-        assertFalse(target.isInRegularRAM(target.definingScope()))
+        assertFalse(C64Target.isInRegularRAM(target, program))
     }
 
     @Test
@@ -478,89 +481,95 @@ class TestMemory {
         val target = AssignTarget(null, null, DirectMemoryWrite(memexpr, Position.DUMMY), Position.DUMMY)
         val assignment = Assignment(target, NumericLiteralValue.optimalInteger(0, Position.DUMMY), Position.DUMMY)
         val subroutine = Subroutine("test", emptyList(), emptyList(), emptyList(), emptyList(), emptySet(), null, false, false, mutableListOf(decl, assignment), Position.DUMMY)
-        subroutine.linkParents(ParentSentinel)
+        val module = Module("test", mutableListOf(subroutine), Position.DUMMY, false, Path.of(""))
+        module.linkParents(ParentSentinel)
         return target
     }
 
     @Test
     fun testInValidRamC64_memory_expression() {
-        CompilationTarget.instance = C64Target
         val memexpr = PrefixExpression("+", NumericLiteralValue.optimalInteger(0x1000, Position.DUMMY), Position.DUMMY)
         val target = AssignTarget(null, null, DirectMemoryWrite(memexpr, Position.DUMMY), Position.DUMMY)
-        val scope = AnonymousScope(mutableListOf(), Position.DUMMY)
+        val program = Program("test", mutableListOf(), DummyFunctions())
-        assertFalse(target.isInRegularRAM(scope))
+        assertFalse(C64Target.isInRegularRAM(target, program))
     }
 
     @Test
     fun testInValidRamC64_variable() {
-        CompilationTarget.instance = C64Target
         val decl = VarDecl(VarDeclType.VAR, DataType.BYTE, ZeropageWish.DONTCARE, null, "address", null, null, false, false, Position.DUMMY)
         val target = AssignTarget(IdentifierReference(listOf("address"), Position.DUMMY), null, null, Position.DUMMY)
         val assignment = Assignment(target, NumericLiteralValue.optimalInteger(0, Position.DUMMY), Position.DUMMY)
         val subroutine = Subroutine("test", emptyList(), emptyList(), emptyList(), emptyList(), emptySet(), null, false, false, mutableListOf(decl, assignment), Position.DUMMY)
-        subroutine.linkParents(ParentSentinel)
+        val module = Module("test", mutableListOf(subroutine), Position.DUMMY, false, Path.of(""))
-        assertTrue(target.isInRegularRAM(target.definingScope()))
+        val program = Program("test", mutableListOf(module), DummyFunctions())
+        module.linkParents(ParentSentinel)
+        assertTrue(C64Target.isInRegularRAM(target, program))
     }
 
     @Test
     fun testInValidRamC64_memmap_variable() {
-        CompilationTarget.instance = C64Target
         val address = 0x1000
         val decl = VarDecl(VarDeclType.MEMORY, DataType.UBYTE, ZeropageWish.DONTCARE, null, "address", null, NumericLiteralValue.optimalInteger(address, Position.DUMMY), false, false, Position.DUMMY)
         val target = AssignTarget(IdentifierReference(listOf("address"), Position.DUMMY), null, null, Position.DUMMY)
         val assignment = Assignment(target, NumericLiteralValue.optimalInteger(0, Position.DUMMY), Position.DUMMY)
         val subroutine = Subroutine("test", emptyList(), emptyList(), emptyList(), emptyList(), emptySet(), null, false, false, mutableListOf(decl, assignment), Position.DUMMY)
-        subroutine.linkParents(ParentSentinel)
+        val module = Module("test", mutableListOf(subroutine), Position.DUMMY, false, Path.of(""))
-        assertTrue(target.isInRegularRAM(target.definingScope()))
+        val program = Program("test", mutableListOf(module), DummyFunctions())
+        module.linkParents(ParentSentinel)
+        assertTrue(C64Target.isInRegularRAM(target, program))
     }
 
     @Test
     fun testNotInValidRamC64_memmap_variable() {
-        CompilationTarget.instance = C64Target
         val address = 0xd020
         val decl = VarDecl(VarDeclType.MEMORY, DataType.UBYTE, ZeropageWish.DONTCARE, null, "address", null, NumericLiteralValue.optimalInteger(address, Position.DUMMY), false, false, Position.DUMMY)
         val target = AssignTarget(IdentifierReference(listOf("address"), Position.DUMMY), null, null, Position.DUMMY)
         val assignment = Assignment(target, NumericLiteralValue.optimalInteger(0, Position.DUMMY), Position.DUMMY)
         val subroutine = Subroutine("test", emptyList(), emptyList(), emptyList(), emptyList(), emptySet(), null, false, false, mutableListOf(decl, assignment), Position.DUMMY)
-        subroutine.linkParents(ParentSentinel)
+        val module = Module("test", mutableListOf(subroutine), Position.DUMMY, false, Path.of(""))
-        assertFalse(target.isInRegularRAM(target.definingScope()))
+        val program = Program("test", mutableListOf(module), DummyFunctions())
+        module.linkParents(ParentSentinel)
+        assertFalse(C64Target.isInRegularRAM(target, program))
     }
 
     @Test
     fun testInValidRamC64_array() {
-        CompilationTarget.instance = C64Target
         val decl = VarDecl(VarDeclType.VAR, DataType.ARRAY_UB, ZeropageWish.DONTCARE, null, "address", null, null, false, false, Position.DUMMY)
         val arrayindexed = ArrayIndexedExpression(IdentifierReference(listOf("address"), Position.DUMMY), ArrayIndex(NumericLiteralValue.optimalInteger(1, Position.DUMMY), Position.DUMMY), Position.DUMMY)
         val target = AssignTarget(null, arrayindexed, null, Position.DUMMY)
         val assignment = Assignment(target, NumericLiteralValue.optimalInteger(0, Position.DUMMY), Position.DUMMY)
         val subroutine = Subroutine("test", emptyList(), emptyList(), emptyList(), emptyList(), emptySet(), null, false, false, mutableListOf(decl, assignment), Position.DUMMY)
-        subroutine.linkParents(ParentSentinel)
+        val module = Module("test", mutableListOf(subroutine), Position.DUMMY, false, Path.of(""))
-        assertTrue(target.isInRegularRAM(target.definingScope()))
+        val program = Program("test", mutableListOf(module), DummyFunctions())
+        module.linkParents(ParentSentinel)
+        assertTrue(C64Target.isInRegularRAM(target, program))
     }
 
     @Test
     fun testInValidRamC64_array_memmapped() {
-        CompilationTarget.instance = C64Target
         val address = 0x1000
         val decl = VarDecl(VarDeclType.MEMORY, DataType.ARRAY_UB, ZeropageWish.DONTCARE, null, "address", null, NumericLiteralValue.optimalInteger(address, Position.DUMMY), false, false, Position.DUMMY)
         val arrayindexed = ArrayIndexedExpression(IdentifierReference(listOf("address"), Position.DUMMY), ArrayIndex(NumericLiteralValue.optimalInteger(1, Position.DUMMY), Position.DUMMY), Position.DUMMY)
         val target = AssignTarget(null, arrayindexed, null, Position.DUMMY)
         val assignment = Assignment(target, NumericLiteralValue.optimalInteger(0, Position.DUMMY), Position.DUMMY)
         val subroutine = Subroutine("test", emptyList(), emptyList(), emptyList(), emptyList(), emptySet(), null, false, false, mutableListOf(decl, assignment), Position.DUMMY)
-        subroutine.linkParents(ParentSentinel)
+        val module = Module("test", mutableListOf(subroutine), Position.DUMMY, false, Path.of(""))
-        assertTrue(target.isInRegularRAM(target.definingScope()))
+        val program = Program("test", mutableListOf(module), DummyFunctions())
+        module.linkParents(ParentSentinel)
+        assertTrue(C64Target.isInRegularRAM(target, program))
     }
 
     @Test
     fun testNotValidRamC64_array_memmapped() {
-        CompilationTarget.instance = C64Target
         val address = 0xe000
         val decl = VarDecl(VarDeclType.MEMORY, DataType.ARRAY_UB, ZeropageWish.DONTCARE, null, "address", null, NumericLiteralValue.optimalInteger(address, Position.DUMMY), false, false, Position.DUMMY)
         val arrayindexed = ArrayIndexedExpression(IdentifierReference(listOf("address"), Position.DUMMY), ArrayIndex(NumericLiteralValue.optimalInteger(1, Position.DUMMY), Position.DUMMY), Position.DUMMY)
         val target = AssignTarget(null, arrayindexed, null, Position.DUMMY)
         val assignment = Assignment(target, NumericLiteralValue.optimalInteger(0, Position.DUMMY), Position.DUMMY)
         val subroutine = Subroutine("test", emptyList(), emptyList(), emptyList(), emptyList(), emptySet(), null, false, false, mutableListOf(decl, assignment), Position.DUMMY)
-        subroutine.linkParents(ParentSentinel)
+        val module = Module("test", mutableListOf(subroutine), Position.DUMMY, false, Path.of(""))
-        assertFalse(target.isInRegularRAM(target.definingScope()))
+        val program = Program("test", mutableListOf(module), DummyFunctions())
+        module.linkParents(ParentSentinel)
+        assertFalse(C64Target.isInRegularRAM(target, program))
     }
 }

compilerAst/build.gradle

@@ -0,0 +1,65 @@
+plugins {
+    id 'antlr'
+    id 'java'
+    id "org.jetbrains.kotlin.jvm" version "1.4.30"
+}
+
+targetCompatibility = 11
+sourceCompatibility = 11
+
+repositories {
+    mavenCentral()
+}
+
+
+configurations {
+    // strange antlr plugin issue, see https://github.com/gradle/gradle/issues/820
+    // this avoids linking in the complete antlr binary jar
+    compile {
+        extendsFrom = extendsFrom.findAll { it != configurations.antlr }
+    }
+}
+
+dependencies {
+    antlr 'org.antlr:antlr4:4.9'
+    implementation 'org.antlr:antlr4-runtime:4.9'
+    implementation project(':parser')
+
+//    antlr('org.antlr:antlr4:4.9') {
+//        exclude group: 'com.ibm.icu', module: 'icu4j'
+//    }
+}
+
+compileKotlin {
+    kotlinOptions {
+        jvmTarget = "11"
+        // verbose = true
+        // freeCompilerArgs += "-XXLanguage:+NewInference"
+    }
+}
+
+compileTestKotlin {
+    kotlinOptions {
+        jvmTarget = "11"
+    }
+}
+
+sourceSets {
+    main {
+        java {
+            srcDirs = ["${project.projectDir}/src"]
+        }
+        resources {
+            srcDirs = ["${project.projectDir}/res"]
+        }
+    }
+    test {
+        java {
+            srcDirs = ["${project.projectDir}/test"]
+        }
+    }
+}
+
+task wrapper(type: Wrapper) {
+    gradleVersion = '6.7'
+}

compilerAst/compilerAst.iml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="jdk" jdkName="openjdk-11" jdkType="JavaSDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="KotlinJavaRuntime" level="project" />
+    <orderEntry type="module" module-name="parser" />
+    <orderEntry type="library" name="antlr-runtime-4.9" level="project" />
+  </component>
+</module>

compilerAst/src/prog8/ast/AstToSourceCode.kt

@@ -5,9 +5,9 @@ import prog8.ast.base.DataType
 import prog8.ast.base.NumericDatatypes
 import prog8.ast.base.VarDeclType
 import prog8.ast.expressions.*
-import prog8.ast.processing.IAstVisitor
 import prog8.ast.statements.*
-import prog8.compiler.toHex
+import prog8.ast.walk.IAstVisitor
+
 
 class AstToSourceCode(val output: (text: String) -> Unit, val program: Program): IAstVisitor {
     private var scopelevel = 0
@@ -413,10 +413,6 @@ class AstToSourceCode(val output: (text: String) -> Unit, val program: Program):
         outputlni("}}")
     }
 
-    override fun visit(builtinFunctionStatementPlaceholder: BuiltinFunctionStatementPlaceholder) {
-        output(builtinFunctionStatementPlaceholder.name)
-    }
-
     override fun visit(whenStatement: WhenStatement) {
         output("when ")
         whenStatement.condition.accept(this)

compilerAst/src/prog8/ast/AstToplevel.kt

@@ -3,12 +3,18 @@ package prog8.ast
 import prog8.ast.base.*
 import prog8.ast.expressions.Expression
 import prog8.ast.expressions.IdentifierReference
-import prog8.ast.processing.AstWalker
+import prog8.ast.expressions.InferredTypes
-import prog8.ast.processing.IAstVisitor
+import prog8.ast.expressions.NumericLiteralValue
 import prog8.ast.statements.*
-import prog8.functions.BuiltinFunctions
+import prog8.ast.walk.AstWalker
+import prog8.ast.walk.IAstVisitor
 import java.nio.file.Path
+import kotlin.math.abs
 
+interface IStringEncoding {
+    fun encodeString(str: String, altEncoding: Boolean): List<Short>
+    fun decodeString(bytes: List<Short>, altEncoding: Boolean): String
+}
 
 interface Node {
     val position: Position
@@ -238,11 +244,19 @@ interface IAssignable {
     // just a tag for now
 }
 
+interface IBuiltinFunctions {
+    val names: Set<String>
+    val purefunctionNames: Set<String>
+    fun constValue(name: String, args: List<Expression>, position: Position): NumericLiteralValue?
+    fun returnType(name: String, args: MutableList<Expression>): InferredTypes.InferredType
+}
 
 /*********** Everything starts from here, the Program; zero or more modules *************/
 
-class Program(val name: String, val modules: MutableList<Module>): Node {
+
-    val namespace = GlobalNamespace(modules)
+
+class Program(val name: String, val modules: MutableList<Module>, val builtinFunctions: IBuiltinFunctions): Node {
+    val namespace = GlobalNamespace(modules, builtinFunctions.names)
 
     val definedLoadAddress: Int
         get() = modules.first().loadAddress
@@ -317,7 +331,7 @@ class Module(override val name: String,
 }
 
 
-class GlobalNamespace(val modules: List<Module>): Node, INameScope {
+class GlobalNamespace(val modules: List<Module>, private val builtinFunctionNames: Set<String>): Node, INameScope {
     override val name = "<<<global>>>"
     override val position = Position("<<<global>>>", 0, 0, 0)
     override val statements = mutableListOf<Statement>()        // not used
@@ -332,7 +346,7 @@ class GlobalNamespace(val modules: List<Module>): Node, INameScope {
     }
 
     override fun lookup(scopedName: List<String>, localContext: Node): Statement? {
-        if (scopedName.size == 1 && scopedName[0] in BuiltinFunctions) {
+        if (scopedName.size == 1 && scopedName[0] in builtinFunctionNames) {
             // builtin functions always exist, return a dummy localContext for them
             val builtinPlaceholder = Label("builtin::${scopedName.last()}", localContext.position)
             builtinPlaceholder.parent = ParentSentinel
@@ -379,4 +393,21 @@ object BuiltinFunctionScopePlaceholder : INameScope {
 
 
 // prefix for struct member variables
-internal fun mangledStructMemberName(varName: String, memberName: String) = "prog8struct_${varName}_$memberName"
+fun mangledStructMemberName(varName: String, memberName: String) = "prog8struct_${varName}_$memberName"
+
+
+fun Number.toHex(): String {
+    //  0..15 -> "0".."15"
+    //  16..255 -> "$10".."$ff"
+    //  256..65536 -> "$0100".."$ffff"
+    // negative values are prefixed with '-'.
+    val integer = this.toInt()
+    if(integer<0)
+        return '-' + abs(integer).toHex()
+    return when (integer) {
+        in 0 until 16 -> integer.toString()
+        in 0 until 0x100 -> "$"+integer.toString(16).padStart(2,'0')
+        in 0 until 0x10000 -> "$"+integer.toString(16).padStart(4,'0')
+        else -> throw IllegalArgumentException("number too large for 16 bits $this")
+    }
+}

compilerAst/src/prog8/ast/antlr/Antr2Kotlin.kt

@@ -3,11 +3,11 @@ package prog8.ast.antlr
 import org.antlr.v4.runtime.IntStream
 import org.antlr.v4.runtime.ParserRuleContext
 import org.antlr.v4.runtime.tree.TerminalNode
+import prog8.ast.IStringEncoding
 import prog8.ast.Module
 import prog8.ast.base.*
 import prog8.ast.expressions.*
 import prog8.ast.statements.*
-import prog8.compiler.target.CompilationTarget
 import prog8.parser.CustomLexer
 import prog8.parser.prog8Parser
 import java.io.CharConversionException
@@ -19,10 +19,10 @@ import java.nio.file.Path
 
 private data class NumericLiteral(val number: Number, val datatype: DataType)
 
-internal fun prog8Parser.ModuleContext.toAst(name: String, isLibrary: Boolean, source: Path) : Module {
+internal fun prog8Parser.ModuleContext.toAst(name: String, isLibrary: Boolean, source: Path, encoding: IStringEncoding) : Module {
     val nameWithoutSuffix = if(name.endsWith(".p8")) name.substringBeforeLast('.') else name
     val directives = this.directive().map { it.toAst() }
-    val blocks = this.block().map { it.toAst(isLibrary) }
+    val blocks = this.block().map { it.toAst(isLibrary, encoding) }
     return Module(nameWithoutSuffix, (directives + blocks).toMutableList(), toPosition(), isLibrary, source)
 }
 
@@ -38,11 +38,11 @@ private fun ParserRuleContext.toPosition() : Position {
     return Position(filename, start.line, start.charPositionInLine, stop.charPositionInLine + stop.text.length)
 }
 
-private fun prog8Parser.BlockContext.toAst(isInLibrary: Boolean) : Statement {
+private fun prog8Parser.BlockContext.toAst(isInLibrary: Boolean, encoding: IStringEncoding) : Statement {
     val blockstatements = block_statement().map {
         when {
-            it.variabledeclaration()!=null -> it.variabledeclaration().toAst()
+            it.variabledeclaration()!=null -> it.variabledeclaration().toAst(encoding)
-            it.subroutinedeclaration()!=null -> it.subroutinedeclaration().toAst()
+            it.subroutinedeclaration()!=null -> it.subroutinedeclaration().toAst(encoding)
             it.directive()!=null -> it.directive().toAst()
             it.inlineasm()!=null -> it.inlineasm().toAst()
             else -> throw FatalAstException("weird block statement $it")
@@ -51,11 +51,11 @@ private fun prog8Parser.BlockContext.toAst(isInLibrary: Boolean) : Statement {
     return Block(identifier().text, integerliteral()?.toAst()?.number?.toInt(), blockstatements.toMutableList(), isInLibrary, toPosition())
 }
 
-private fun prog8Parser.Statement_blockContext.toAst(): MutableList<Statement> =
+private fun prog8Parser.Statement_blockContext.toAst(encoding: IStringEncoding): MutableList<Statement> =
-        statement().asSequence().map { it.toAst() }.toMutableList()
+        statement().asSequence().map { it.toAst(encoding) }.toMutableList()
 
-private fun prog8Parser.VariabledeclarationContext.toAst() : Statement {
+private fun prog8Parser.VariabledeclarationContext.toAst(encoding: IStringEncoding) : Statement {
-    vardecl()?.let { return it.toAst() }
+    vardecl()?.let { return it.toAst(encoding) }
 
     varinitializer()?.let {
         val vd = it.vardecl()
@@ -63,10 +63,10 @@ private fun prog8Parser.VariabledeclarationContext.toAst() : Statement {
                 VarDeclType.VAR,
                 vd.datatype()?.toAst() ?: DataType.STRUCT,
                 if (vd.ZEROPAGE() != null) ZeropageWish.PREFER_ZEROPAGE else ZeropageWish.DONTCARE,
-                vd.arrayindex()?.toAst(),
+                vd.arrayindex()?.toAst(encoding),
                 vd.varname.text,
                 null,
-                it.expression().toAst(),
+                it.expression().toAst(encoding),
                 vd.ARRAYSIG() != null || vd.arrayindex() != null,
                 false,
                 it.toPosition()
@@ -82,7 +82,7 @@ private fun prog8Parser.VariabledeclarationContext.toAst() : Statement {
                 null,
                 vd.varname.text,
                 vd.structname.text,
-                it.expression().toAst(),
+                it.expression().toAst(encoding),
                 isArray = false,
                 autogeneratedDontRemove = false,
                 position = it.toPosition()
@@ -111,10 +111,10 @@ private fun prog8Parser.VariabledeclarationContext.toAst() : Statement {
                 VarDeclType.CONST,
                 vd.datatype()?.toAst() ?: DataType.STRUCT,
                 if (vd.ZEROPAGE() != null) ZeropageWish.PREFER_ZEROPAGE else ZeropageWish.DONTCARE,
-                vd.arrayindex()?.toAst(),
+                vd.arrayindex()?.toAst(encoding),
                 vd.varname.text,
                 null,
-                cvarinit.expression().toAst(),
+                cvarinit.expression().toAst(encoding),
                 vd.ARRAYSIG() != null || vd.arrayindex() != null,
                 false,
                 cvarinit.toPosition()
@@ -128,10 +128,10 @@ private fun prog8Parser.VariabledeclarationContext.toAst() : Statement {
                 VarDeclType.MEMORY,
                 vd.datatype()?.toAst() ?: DataType.STRUCT,
                 if (vd.ZEROPAGE() != null) ZeropageWish.PREFER_ZEROPAGE else ZeropageWish.DONTCARE,
-                vd.arrayindex()?.toAst(),
+                vd.arrayindex()?.toAst(encoding),
                 vd.varname.text,
                 null,
-                mvarinit.expression().toAst(),
+                mvarinit.expression().toAst(encoding),
                 vd.ARRAYSIG() != null || vd.arrayindex() != null,
                 false,
                 mvarinit.toPosition()
@@ -140,40 +140,40 @@ private fun prog8Parser.VariabledeclarationContext.toAst() : Statement {
 
     structdecl()?.let {
         return StructDecl(it.identifier().text,
-                it.vardecl().map { vd->vd.toAst() }.toMutableList(),
+                it.vardecl().map { vd->vd.toAst(encoding) }.toMutableList(),
                 toPosition())
     }
 
     throw FatalAstException("weird variable decl $this")
 }
 
-private fun prog8Parser.SubroutinedeclarationContext.toAst() : Subroutine {
+private fun prog8Parser.SubroutinedeclarationContext.toAst(encoding: IStringEncoding) : Subroutine {
     return when {
-        subroutine()!=null -> subroutine().toAst()
+        subroutine()!=null -> subroutine().toAst(encoding)
-        asmsubroutine()!=null -> asmsubroutine().toAst()
+        asmsubroutine()!=null -> asmsubroutine().toAst(encoding)
         romsubroutine()!=null -> romsubroutine().toAst()
         else -> throw FatalAstException("weird subroutine decl $this")
     }
 }
 
-private fun prog8Parser.StatementContext.toAst() : Statement {
+private fun prog8Parser.StatementContext.toAst(encoding: IStringEncoding) : Statement {
-    val vardecl = variabledeclaration()?.toAst()
+    val vardecl = variabledeclaration()?.toAst(encoding)
     if(vardecl!=null) return vardecl
 
     assignment()?.let {
-        return Assignment(it.assign_target().toAst(), it.expression().toAst(), it.toPosition())
+        return Assignment(it.assign_target().toAst(encoding), it.expression().toAst(encoding), it.toPosition())
     }
 
     augassignment()?.let {
         // replace A += X  with  A = A + X
-        val target = it.assign_target().toAst()
+        val target = it.assign_target().toAst(encoding)
         val oper = it.operator.text.substringBefore('=')
-        val expression = BinaryExpression(target.toExpression(), oper, it.expression().toAst(), it.expression().toPosition())
+        val expression = BinaryExpression(target.toExpression(), oper, it.expression().toAst(encoding), it.expression().toPosition())
-        return Assignment(it.assign_target().toAst(), expression, it.toPosition())
+        return Assignment(it.assign_target().toAst(encoding), expression, it.toPosition())
     }
 
     postincrdecr()?.let {
-        return PostIncrDecr(it.assign_target().toAst(), it.operator.text, it.toPosition())
+        return PostIncrDecr(it.assign_target().toAst(encoding), it.operator.text, it.toPosition())
     }
 
     val directive = directive()?.toAst()
@@ -185,49 +185,49 @@ private fun prog8Parser.StatementContext.toAst() : Statement {
     val jump = unconditionaljump()?.toAst()
     if(jump!=null) return jump
 
-    val fcall = functioncall_stmt()?.toAst()
+    val fcall = functioncall_stmt()?.toAst(encoding)
     if(fcall!=null) return fcall
 
-    val ifstmt = if_stmt()?.toAst()
+    val ifstmt = if_stmt()?.toAst(encoding)
     if(ifstmt!=null) return ifstmt
 
-    val returnstmt = returnstmt()?.toAst()
+    val returnstmt = returnstmt()?.toAst(encoding)
     if(returnstmt!=null) return returnstmt
 
-    val subroutine = subroutinedeclaration()?.toAst()
+    val subroutine = subroutinedeclaration()?.toAst(encoding)
     if(subroutine!=null) return subroutine
 
     val asm = inlineasm()?.toAst()
     if(asm!=null) return asm
 
-    val branchstmt = branch_stmt()?.toAst()
+    val branchstmt = branch_stmt()?.toAst(encoding)
     if(branchstmt!=null) return branchstmt
 
-    val forloop = forloop()?.toAst()
+    val forloop = forloop()?.toAst(encoding)
     if(forloop!=null) return forloop
 
-    val untilloop = untilloop()?.toAst()
+    val untilloop = untilloop()?.toAst(encoding)
     if(untilloop!=null) return untilloop
 
-    val whileloop = whileloop()?.toAst()
+    val whileloop = whileloop()?.toAst(encoding)
     if(whileloop!=null) return whileloop
 
-    val repeatloop = repeatloop()?.toAst()
+    val repeatloop = repeatloop()?.toAst(encoding)
     if(repeatloop!=null) return repeatloop
 
     val breakstmt = breakstmt()?.toAst()
     if(breakstmt!=null) return breakstmt
 
-    val whenstmt = whenstmt()?.toAst()
+    val whenstmt = whenstmt()?.toAst(encoding)
     if(whenstmt!=null) return whenstmt
 
     throw FatalAstException("unprocessed source text (are we missing ast conversion rules for parser elements?): $text")
 }
 
-private fun prog8Parser.AsmsubroutineContext.toAst(): Subroutine {
+private fun prog8Parser.AsmsubroutineContext.toAst(encoding: IStringEncoding): Subroutine {
     val inline = this.inline()!=null
     val subdecl = asmsub_decl().toAst()
-    val statements = statement_block()?.toAst() ?: mutableListOf()
+    val statements = statement_block()?.toAst(encoding) ?: mutableListOf()
     return Subroutine(subdecl.name, subdecl.parameters, subdecl.returntypes,
             subdecl.asmParameterRegisters, subdecl.asmReturnvaluesRegisters,
             subdecl.asmClobbers, null, true, inline, statements, toPosition())
@@ -308,28 +308,28 @@ private fun prog8Parser.Asmsub_paramsContext.toAst(): List<AsmSubroutineParamete
     AsmSubroutineParameter(vardecl.varname.text, datatype, registerorpair, statusregister, toPosition())
 }
 
-private fun prog8Parser.Functioncall_stmtContext.toAst(): Statement {
+private fun prog8Parser.Functioncall_stmtContext.toAst(encoding: IStringEncoding): Statement {
     val void = this.VOID() != null
     val location = scoped_identifier().toAst()
     return if(expression_list() == null)
         FunctionCallStatement(location, mutableListOf(), void, toPosition())
     else
-        FunctionCallStatement(location, expression_list().toAst().toMutableList(), void, toPosition())
+        FunctionCallStatement(location, expression_list().toAst(encoding).toMutableList(), void, toPosition())
 }
 
-private fun prog8Parser.FunctioncallContext.toAst(): FunctionCall {
+private fun prog8Parser.FunctioncallContext.toAst(encoding: IStringEncoding): FunctionCall {
     val location = scoped_identifier().toAst()
     return if(expression_list() == null)
         FunctionCall(location, mutableListOf(), toPosition())
     else
-        FunctionCall(location, expression_list().toAst().toMutableList(), toPosition())
+        FunctionCall(location, expression_list().toAst(encoding).toMutableList(), toPosition())
 }
 
 private fun prog8Parser.InlineasmContext.toAst() =
         InlineAssembly(INLINEASMBLOCK().text, toPosition())
 
-private fun prog8Parser.ReturnstmtContext.toAst() : Return {
+private fun prog8Parser.ReturnstmtContext.toAst(encoding: IStringEncoding) : Return {
-    return Return(expression()?.toAst(), toPosition())
+    return Return(expression()?.toAst(encoding), toPosition())
 }
 
 private fun prog8Parser.UnconditionaljumpContext.toAst(): Jump {
@@ -341,14 +341,14 @@ private fun prog8Parser.UnconditionaljumpContext.toAst(): Jump {
 private fun prog8Parser.LabeldefContext.toAst(): Statement =
         Label(children[0].text, toPosition())
 
-private fun prog8Parser.SubroutineContext.toAst() : Subroutine {
+private fun prog8Parser.SubroutineContext.toAst(encoding: IStringEncoding) : Subroutine {
     // non-asm subroutine
     val inline = inline()!=null
     val returntypes = sub_return_part()?.toAst() ?: emptyList()
     return Subroutine(identifier().text,
             sub_params()?.toAst() ?: emptyList(),
             returntypes,
-            statement_block()?.toAst() ?: mutableListOf(),
+            statement_block()?.toAst(encoding) ?: mutableListOf(),
             inline,
             toPosition())
 }
@@ -364,12 +364,12 @@ private fun prog8Parser.Sub_paramsContext.toAst(): List<SubroutineParameter> =
             SubroutineParameter(it.varname.text, datatype, it.toPosition())
         }
 
-private fun prog8Parser.Assign_targetContext.toAst() : AssignTarget {
+private fun prog8Parser.Assign_targetContext.toAst(encoding: IStringEncoding) : AssignTarget {
     val identifier = scoped_identifier()
     return when {
         identifier!=null -> AssignTarget(identifier.toAst(), null, null, toPosition())
-        arrayindexed()!=null -> AssignTarget(null, arrayindexed().toAst(), null, toPosition())
+        arrayindexed()!=null -> AssignTarget(null, arrayindexed().toAst(encoding), null, toPosition())
-        directmemory()!=null -> AssignTarget(null, null, DirectMemoryWrite(directmemory().expression().toAst(), toPosition()), toPosition())
+        directmemory()!=null -> AssignTarget(null, null, DirectMemoryWrite(directmemory().expression().toAst(encoding), toPosition()), toPosition())
         else -> AssignTarget(scoped_identifier()?.toAst(), null, null, toPosition())
     }
 }
@@ -381,8 +381,8 @@ private fun prog8Parser.ClobberContext.toAst() : Set<CpuRegister> {
 
 private fun prog8Parser.DatatypeContext.toAst() = DataType.valueOf(text.toUpperCase())
 
-private fun prog8Parser.ArrayindexContext.toAst() : ArrayIndex =
+private fun prog8Parser.ArrayindexContext.toAst(encoding: IStringEncoding) : ArrayIndex =
-        ArrayIndex(expression().toAst(), toPosition())
+        ArrayIndex(expression().toAst(encoding), toPosition())
 
 private fun prog8Parser.DirectiveContext.toAst() : Directive =
         Directive(directivename.text, directivearg().map { it.toAst() }, toPosition())
@@ -446,7 +446,7 @@ private fun prog8Parser.IntegerliteralContext.toAst(): NumericLiteral {
     }
 }
 
-private fun prog8Parser.ExpressionContext.toAst() : Expression {
+private fun prog8Parser.ExpressionContext.toAst(encoding: IStringEncoding) : Expression {
 
     val litval = literalvalue()
     if(litval!=null) {
@@ -469,7 +469,7 @@ private fun prog8Parser.ExpressionContext.toAst() : Expression {
                 litval.stringliteral()!=null -> litval.stringliteral().toAst()
                 litval.charliteral()!=null -> {
                     try {
-                        NumericLiteralValue(DataType.UBYTE, CompilationTarget.instance.encodeString(
+                        NumericLiteralValue(DataType.UBYTE, encoding.encodeString(
                                 unescape(litval.charliteral().SINGLECHAR().text, litval.toPosition()),
                                 litval.charliteral().ALT_STRING_ENCODING()!=null)[0], litval.toPosition())
                     } catch (ce: CharConversionException) {
@@ -477,7 +477,7 @@ private fun prog8Parser.ExpressionContext.toAst() : Expression {
                     }
                 }
                 litval.arrayliteral()!=null -> {
-                    val array = litval.arrayliteral().toAst()
+                    val array = litval.arrayliteral().toAst(encoding)
                     // the actual type of the arraysize can not yet be determined here (missing namespace & heap)
                     // the ConstantFold takes care of that and converts the type if needed.
                     ArrayLiteralValue(InferredTypes.InferredType.unknown(), array, position = litval.toPosition())
@@ -491,31 +491,31 @@ private fun prog8Parser.ExpressionContext.toAst() : Expression {
         return scoped_identifier().toAst()
 
     if(bop!=null)
-        return BinaryExpression(left.toAst(), bop.text, right.toAst(), toPosition())
+        return BinaryExpression(left.toAst(encoding), bop.text, right.toAst(encoding), toPosition())
 
     if(prefix!=null)
-        return PrefixExpression(prefix.text, expression(0).toAst(), toPosition())
+        return PrefixExpression(prefix.text, expression(0).toAst(encoding), toPosition())
 
-    val funcall = functioncall()?.toAst()
+    val funcall = functioncall()?.toAst(encoding)
     if(funcall!=null) return funcall
 
     if (rangefrom!=null && rangeto!=null) {
         val defaultstep = if(rto.text == "to") 1 else -1
-        val step = rangestep?.toAst() ?: NumericLiteralValue(DataType.UBYTE, defaultstep, toPosition())
+        val step = rangestep?.toAst(encoding) ?: NumericLiteralValue(DataType.UBYTE, defaultstep, toPosition())
-        return RangeExpr(rangefrom.toAst(), rangeto.toAst(), step, toPosition())
+        return RangeExpr(rangefrom.toAst(encoding), rangeto.toAst(encoding), step, encoding, toPosition())
     }
 
     if(childCount==3 && children[0].text=="(" && children[2].text==")")
-        return expression(0).toAst()        // expression within ( )
+        return expression(0).toAst(encoding)        // expression within ( )
 
     if(arrayindexed()!=null)
-        return arrayindexed().toAst()
+        return arrayindexed().toAst(encoding)
 
     if(typecast()!=null)
-        return TypecastExpression(expression(0).toAst(), typecast().datatype().toAst(), false, toPosition())
+        return TypecastExpression(expression(0).toAst(encoding), typecast().datatype().toAst(), false, toPosition())
 
     if(directmemory()!=null)
-        return DirectMemoryRead(directmemory().expression().toAst(), toPosition())
+        return DirectMemoryRead(directmemory().expression().toAst(encoding), toPosition())
 
     if(addressof()!=null)
         return AddressOf(addressof().scoped_identifier().toAst(), toPosition())
@@ -526,13 +526,13 @@ private fun prog8Parser.ExpressionContext.toAst() : Expression {
 private fun prog8Parser.StringliteralContext.toAst(): StringLiteralValue =
     StringLiteralValue(unescape(this.STRING().text, toPosition()), ALT_STRING_ENCODING()!=null, toPosition())
 
-private fun prog8Parser.ArrayindexedContext.toAst(): ArrayIndexedExpression {
+private fun prog8Parser.ArrayindexedContext.toAst(encoding: IStringEncoding): ArrayIndexedExpression {
     return ArrayIndexedExpression(scoped_identifier().toAst(),
-            arrayindex().toAst(),
+            arrayindex().toAst(encoding),
             toPosition())
 }
 
-private fun prog8Parser.Expression_listContext.toAst() = expression().map{ it.toAst() }
+private fun prog8Parser.Expression_listContext.toAst(encoding: IStringEncoding) = expression().map{ it.toAst(encoding) }
 
 private fun prog8Parser.IdentifierContext.toAst() : IdentifierReference =
         IdentifierReference(listOf(text), toPosition())
@@ -548,27 +548,27 @@ private fun prog8Parser.BooleanliteralContext.toAst() = when(text) {
     else -> throw FatalAstException(text)
 }
 
-private fun prog8Parser.ArrayliteralContext.toAst() : Array<Expression> =
+private fun prog8Parser.ArrayliteralContext.toAst(encoding: IStringEncoding) : Array<Expression> =
-        expression().map { it.toAst() }.toTypedArray()
+        expression().map { it.toAst(encoding) }.toTypedArray()
 
-private fun prog8Parser.If_stmtContext.toAst(): IfStatement {
+private fun prog8Parser.If_stmtContext.toAst(encoding: IStringEncoding): IfStatement {
-    val condition = expression().toAst()
+    val condition = expression().toAst(encoding)
-    val trueStatements = statement_block()?.toAst() ?: mutableListOf(statement().toAst())
+    val trueStatements = statement_block()?.toAst(encoding) ?: mutableListOf(statement().toAst(encoding))
-    val elseStatements = else_part()?.toAst() ?: mutableListOf()
+    val elseStatements = else_part()?.toAst(encoding) ?: mutableListOf()
     val trueScope = AnonymousScope(trueStatements, statement_block()?.toPosition()
             ?: statement().toPosition())
     val elseScope = AnonymousScope(elseStatements, else_part()?.toPosition() ?: toPosition())
     return IfStatement(condition, trueScope, elseScope, toPosition())
 }
 
-private fun prog8Parser.Else_partContext.toAst(): MutableList<Statement> {
+private fun prog8Parser.Else_partContext.toAst(encoding: IStringEncoding): MutableList<Statement> {
-    return statement_block()?.toAst() ?: mutableListOf(statement().toAst())
+    return statement_block()?.toAst(encoding) ?: mutableListOf(statement().toAst(encoding))
 }
 
-private fun prog8Parser.Branch_stmtContext.toAst(): BranchStatement {
+private fun prog8Parser.Branch_stmtContext.toAst(encoding: IStringEncoding): BranchStatement {
     val branchcondition = branchcondition().toAst()
-    val trueStatements = statement_block()?.toAst() ?: mutableListOf(statement().toAst())
+    val trueStatements = statement_block()?.toAst(encoding) ?: mutableListOf(statement().toAst(encoding))
-    val elseStatements = else_part()?.toAst() ?: mutableListOf()
+    val elseStatements = else_part()?.toAst(encoding) ?: mutableListOf()
     val trueScope = AnonymousScope(trueStatements, statement_block()?.toPosition()
             ?: statement().toPosition())
     val elseScope = AnonymousScope(elseStatements, else_part()?.toPosition() ?: toPosition())
@@ -577,65 +577,65 @@ private fun prog8Parser.Branch_stmtContext.toAst(): BranchStatement {
 
 private fun prog8Parser.BranchconditionContext.toAst() = BranchCondition.valueOf(text.substringAfter('_').toUpperCase())
 
-private fun prog8Parser.ForloopContext.toAst(): ForLoop {
+private fun prog8Parser.ForloopContext.toAst(encoding: IStringEncoding): ForLoop {
     val loopvar = identifier().toAst()
-    val iterable = expression()!!.toAst()
+    val iterable = expression()!!.toAst(encoding)
     val scope =
             if(statement()!=null)
-                AnonymousScope(mutableListOf(statement().toAst()), statement().toPosition())
+                AnonymousScope(mutableListOf(statement().toAst(encoding)), statement().toPosition())
             else
-                AnonymousScope(statement_block().toAst(), statement_block().toPosition())
+                AnonymousScope(statement_block().toAst(encoding), statement_block().toPosition())
     return ForLoop(loopvar, iterable, scope, toPosition())
 }
 
 private fun prog8Parser.BreakstmtContext.toAst() = Break(toPosition())
 
-private fun prog8Parser.WhileloopContext.toAst(): WhileLoop {
+private fun prog8Parser.WhileloopContext.toAst(encoding: IStringEncoding): WhileLoop {
-    val condition = expression().toAst()
+    val condition = expression().toAst(encoding)
-    val statements = statement_block()?.toAst() ?: mutableListOf(statement().toAst())
+    val statements = statement_block()?.toAst(encoding) ?: mutableListOf(statement().toAst(encoding))
     val scope = AnonymousScope(statements, statement_block()?.toPosition()
             ?: statement().toPosition())
     return WhileLoop(condition, scope, toPosition())
 }
 
-private fun prog8Parser.RepeatloopContext.toAst(): RepeatLoop {
+private fun prog8Parser.RepeatloopContext.toAst(encoding: IStringEncoding): RepeatLoop {
-    val iterations = expression()?.toAst()
+    val iterations = expression()?.toAst(encoding)
-    val statements = statement_block()?.toAst() ?: mutableListOf(statement().toAst())
+    val statements = statement_block()?.toAst(encoding) ?: mutableListOf(statement().toAst(encoding))
     val scope = AnonymousScope(statements, statement_block()?.toPosition()
             ?: statement().toPosition())
     return RepeatLoop(iterations, scope, toPosition())
 }
 
-private fun prog8Parser.UntilloopContext.toAst(): UntilLoop {
+private fun prog8Parser.UntilloopContext.toAst(encoding: IStringEncoding): UntilLoop {
-    val untilCondition = expression().toAst()
+    val untilCondition = expression().toAst(encoding)
-    val statements = statement_block()?.toAst() ?: mutableListOf(statement().toAst())
+    val statements = statement_block()?.toAst(encoding) ?: mutableListOf(statement().toAst(encoding))
     val scope = AnonymousScope(statements, statement_block()?.toPosition()
             ?: statement().toPosition())
     return UntilLoop(scope, untilCondition, toPosition())
 }
 
-private fun prog8Parser.WhenstmtContext.toAst(): WhenStatement {
+private fun prog8Parser.WhenstmtContext.toAst(encoding: IStringEncoding): WhenStatement {
-    val condition = expression().toAst()
+    val condition = expression().toAst(encoding)
-    val choices = this.when_choice()?.map { it.toAst() }?.toMutableList() ?: mutableListOf()
+    val choices = this.when_choice()?.map { it.toAst(encoding) }?.toMutableList() ?: mutableListOf()
     return WhenStatement(condition, choices, toPosition())
 }
 
-private fun prog8Parser.When_choiceContext.toAst(): WhenChoice {
+private fun prog8Parser.When_choiceContext.toAst(encoding: IStringEncoding): WhenChoice {
-    val values = expression_list()?.toAst()
+    val values = expression_list()?.toAst(encoding)
-    val stmt = statement()?.toAst()
+    val stmt = statement()?.toAst(encoding)
-    val stmtBlock = statement_block()?.toAst()?.toMutableList() ?: mutableListOf()
+    val stmtBlock = statement_block()?.toAst(encoding)?.toMutableList() ?: mutableListOf()
     if(stmt!=null)
         stmtBlock.add(stmt)
     val scope = AnonymousScope(stmtBlock, toPosition())
     return WhenChoice(values?.toMutableList(), scope, toPosition())
 }
 
-private fun prog8Parser.VardeclContext.toAst(): VarDecl {
+private fun prog8Parser.VardeclContext.toAst(encoding: IStringEncoding): VarDecl {
     return VarDecl(
             VarDeclType.VAR,
             datatype()?.toAst() ?: DataType.STRUCT,
             if(ZEROPAGE() != null) ZeropageWish.PREFER_ZEROPAGE else ZeropageWish.DONTCARE,
-            arrayindex()?.toAst(),
+            arrayindex()?.toAst(encoding),
             varname.text,
             null,
             null,
@@ -644,48 +644,3 @@ private fun prog8Parser.VardeclContext.toAst(): VarDecl {
             toPosition()
     )
 }
-
-internal fun escape(str: String): String {
-    val es = str.map {
-        when(it) {
-            '\t' -> "\\t"
-            '\n' -> "\\n"
-            '\r' -> "\\r"
-            '"' -> "\\\""
-            in '\u8000'..'\u80ff' -> "\\x" + (it.toInt() - 0x8000).toString(16).padStart(2, '0')
-            in '\u0000'..'\u00ff' -> it.toString()
-            else -> "\\u" + it.toInt().toString(16).padStart(4, '0')
-        }
-    }
-    return es.joinToString("")
-}
-
-internal fun unescape(str: String, position: Position): String {
-    val result = mutableListOf<Char>()
-    val iter = str.iterator()
-    while(iter.hasNext()) {
-        val c = iter.nextChar()
-        if(c=='\\') {
-            val ec = iter.nextChar()
-            result.add(when(ec) {
-                '\\' -> '\\'
-                'n' -> '\n'
-                'r' -> '\r'
-                '"' -> '"'
-                '\'' -> '\''
-                'u' -> {
-                    "${iter.nextChar()}${iter.nextChar()}${iter.nextChar()}${iter.nextChar()}".toInt(16).toChar()
-                }
-                'x' -> {
-                    // special hack 0x8000..0x80ff  will be outputted verbatim without encoding
-                    val hex = ("" + iter.nextChar() + iter.nextChar()).toInt(16)
-                    (0x8000 + hex).toChar()
-                }
-                else -> throw SyntaxError("invalid escape char in string: \\$ec", position)
-            })
-        } else {
-            result.add(c)
-        }
-    }
-    return result.joinToString("")
-}

compilerAst/src/prog8/ast/antlr/EscapeChars.kt

@@ -0,0 +1,49 @@
+package prog8.ast.antlr
+
+import prog8.ast.base.Position
+import prog8.ast.base.SyntaxError
+
+fun escape(str: String): String {
+    val es = str.map {
+        when(it) {
+            '\t' -> "\\t"
+            '\n' -> "\\n"
+            '\r' -> "\\r"
+            '"' -> "\\\""
+            in '\u8000'..'\u80ff' -> "\\x" + (it.toInt() - 0x8000).toString(16).padStart(2, '0')
+            in '\u0000'..'\u00ff' -> it.toString()
+            else -> "\\u" + it.toInt().toString(16).padStart(4, '0')
+        }
+    }
+    return es.joinToString("")
+}
+
+fun unescape(str: String, position: Position): String {
+    val result = mutableListOf<Char>()
+    val iter = str.iterator()
+    while(iter.hasNext()) {
+        val c = iter.nextChar()
+        if(c=='\\') {
+            val ec = iter.nextChar()
+            result.add(when(ec) {
+                '\\' -> '\\'
+                'n' -> '\n'
+                'r' -> '\r'
+                '"' -> '"'
+                '\'' -> '\''
+                'u' -> {
+                    "${iter.nextChar()}${iter.nextChar()}${iter.nextChar()}${iter.nextChar()}".toInt(16).toChar()
+                }
+                'x' -> {
+                    // special hack 0x8000..0x80ff  will be outputted verbatim without encoding
+                    val hex = ("" + iter.nextChar() + iter.nextChar()).toInt(16)
+                    (0x8000 + hex).toChar()
+                }
+                else -> throw SyntaxError("invalid escape char in string: \\$ec", position)
+            })
+        } else {
+            result.add(c)
+        }
+    }
+    return result.joinToString("")
+}

compilerAst/src/prog8/ast/base/Base.kt

@@ -1,7 +1,6 @@
 package prog8.ast.base
 
 import prog8.ast.Node
-import prog8.compiler.target.CompilationTarget
 
 
 /**************************** AST Data classes ****************************/
@@ -44,7 +43,7 @@ enum class DataType {
                 this == other -> false
                 this in ByteDatatypes -> false
                 this in WordDatatypes -> other in ByteDatatypes
-                this==STR && other==UWORD || this==UWORD && other==STR -> false
+                this== STR && other== UWORD || this== UWORD && other== STR -> false
                 else -> true
             }
 
@@ -53,19 +52,9 @@ enum class DataType {
                 this == other -> true
                 this in ByteDatatypes -> other in ByteDatatypes
                 this in WordDatatypes -> other in WordDatatypes
-                this==STR && other==UWORD || this==UWORD && other==STR -> true
+                this== STR && other== UWORD || this== UWORD && other== STR -> true
                 else -> false
             }
-
-    fun memorySize(): Int {
-        return when(this) {
-            in ByteDatatypes -> 1
-            in WordDatatypes -> 2
-            FLOAT -> CompilationTarget.instance.machine.FLOAT_MEM_SIZE
-            in PassByReferenceDatatypes -> CompilationTarget.instance.machine.POINTER_MEM_SIZE
-            else -> -9999999
-        }
-    }
 }
 
 enum class CpuRegister {
@@ -91,6 +80,13 @@ enum class RegisterOrPair {
         val names by lazy { values().map { it.toString()} }
     }
 
+    fun asCpuRegister(): CpuRegister = when(this) {
+        A -> CpuRegister.A
+        X -> CpuRegister.X
+        Y -> CpuRegister.Y
+        else -> throw IllegalArgumentException("no cpu hardware register for $this")
+    }
+
 }       // only used in parameter and return value specs in asm subroutines
 
 enum class Statusflag {
@@ -135,7 +131,8 @@ val IterableDatatypes = setOf(
     DataType.STR,
     DataType.ARRAY_UB, DataType.ARRAY_B,
     DataType.ARRAY_UW, DataType.ARRAY_W,
-        DataType.ARRAY_F)
+    DataType.ARRAY_F
+)
 val PassByValueDatatypes = NumericDatatypes
 val PassByReferenceDatatypes = IterableDatatypes.plus(DataType.STRUCT)
 val ArrayElementTypes = mapOf(
@@ -144,7 +141,8 @@ val ArrayElementTypes = mapOf(
         DataType.ARRAY_UB to DataType.UBYTE,
         DataType.ARRAY_W to DataType.WORD,
         DataType.ARRAY_UW to DataType.UWORD,
-        DataType.ARRAY_F to DataType.FLOAT)
+        DataType.ARRAY_F to DataType.FLOAT
+)
 val ElementArrayTypes = mapOf(
         DataType.BYTE to DataType.ARRAY_B,
         DataType.UBYTE to DataType.ARRAY_UB,
@@ -152,10 +150,12 @@ val ElementArrayTypes = mapOf(
         DataType.UWORD to DataType.ARRAY_UW,
         DataType.FLOAT to DataType.ARRAY_F
 )
-val Cx16VirtualRegisters = listOf(RegisterOrPair.R0, RegisterOrPair.R1, RegisterOrPair.R2, RegisterOrPair.R3,
+val Cx16VirtualRegisters = listOf(
+    RegisterOrPair.R0, RegisterOrPair.R1, RegisterOrPair.R2, RegisterOrPair.R3,
     RegisterOrPair.R4, RegisterOrPair.R5, RegisterOrPair.R6, RegisterOrPair.R7,
     RegisterOrPair.R8, RegisterOrPair.R9, RegisterOrPair.R10, RegisterOrPair.R11,
-    RegisterOrPair.R12, RegisterOrPair.R13, RegisterOrPair.R14, RegisterOrPair.R15)
+    RegisterOrPair.R12, RegisterOrPair.R13, RegisterOrPair.R14, RegisterOrPair.R15
+)
 
 
 // find the parent node of a specific type or interface

compilerAst/src/prog8/ast/expressions/AstExpressions.kt

@@ -3,14 +3,9 @@ package prog8.ast.expressions
 import prog8.ast.*
 import prog8.ast.antlr.escape
 import prog8.ast.base.*
-import prog8.ast.processing.AstWalker
-import prog8.ast.processing.IAstVisitor
 import prog8.ast.statements.*
-import prog8.compiler.target.CompilationTarget
+import prog8.ast.walk.AstWalker
-import prog8.functions.BuiltinFunctions
+import prog8.ast.walk.IAstVisitor
-import prog8.functions.CannotEvaluateException
-import prog8.functions.NotConstArgumentException
-import prog8.functions.builtinFunctionReturnType
 import java.util.*
 import kotlin.math.abs
 
@@ -152,10 +147,13 @@ class BinaryExpression(var left: Expression, var operator: String, var right: Ex
                     InferredTypes.unknown()
                 else {
                     try {
-                        InferredTypes.knownFor(commonDatatype(
+                        InferredTypes.knownFor(
+                            commonDatatype(
                                 leftDt.typeOrElse(DataType.BYTE),
                                 rightDt.typeOrElse(DataType.BYTE),
-                                null, null).first)
+                                null, null
+                            ).first
+                        )
                     } catch (x: FatalAstException) {
                         InferredTypes.unknown()
                     }
@@ -257,7 +255,7 @@ class ArrayIndexedExpression(var arrayvar: IdentifierReference,
     override fun referencesIdentifier(vararg scopedName: String) = arrayvar.referencesIdentifier(*scopedName)
 
     override fun inferType(program: Program): InferredTypes.InferredType {
-        val target = arrayvar.targetStatement(program.namespace)
+        val target = arrayvar.targetStatement(program)
         if (target is VarDecl) {
             return when (target.datatype) {
                 DataType.STR -> InferredTypes.knownFor(DataType.UBYTE)
@@ -612,6 +610,7 @@ class ArrayLiteralValue(val type: InferredTypes.InferredType,     // inferred be
 class RangeExpr(var from: Expression,
                 var to: Expression,
                 var step: Expression,
+                private val encoding: IStringEncoding,
                 override val position: Position) : Expression() {
     override lateinit var parent: Node
 
@@ -677,8 +676,8 @@ class RangeExpr(var from: Expression,
         val toString = to as? StringLiteralValue
         if(fromString!=null && toString!=null ) {
             // string range -> int range over character values
-            fromVal = CompilationTarget.instance.encodeString(fromString.value, fromString.altEncoding)[0].toInt()
+            fromVal = encoding.encodeString(fromString.value, fromString.altEncoding)[0].toInt()
-            toVal = CompilationTarget.instance.encodeString(toString.value, fromString.altEncoding)[0].toInt()
+            toVal = encoding.encodeString(toString.value, fromString.altEncoding)[0].toInt()
         } else {
             val fromLv = from as? NumericLiteralValue
             val toLv = to as? NumericLiteralValue
@@ -708,17 +707,18 @@ internal fun makeRange(fromVal: Int, toVal: Int, stepVal: Int): IntProgression {
     }
 }
 
-data class IdentifierReference(val nameInSource: List<String>, override val position: Position) : Expression(), IAssignable {
+data class IdentifierReference(val nameInSource: List<String>, override val position: Position) : Expression(),
+    IAssignable {
     override lateinit var parent: Node
 
-    fun targetStatement(namespace: INameScope) =
+    fun targetStatement(program: Program) =
-        if(nameInSource.size==1 && nameInSource[0] in BuiltinFunctions)
+        if(nameInSource.size==1 && nameInSource[0] in program.builtinFunctions.names)
             BuiltinFunctionStatementPlaceholder(nameInSource[0], position)
         else
-            namespace.lookup(nameInSource, this)
+            program.namespace.lookup(nameInSource, this)
 
-    fun targetVarDecl(namespace: INameScope): VarDecl? = targetStatement(namespace) as? VarDecl
+    fun targetVarDecl(program: Program): VarDecl? = targetStatement(program) as? VarDecl
-    fun targetSubroutine(namespace: INameScope): Subroutine? = targetStatement(namespace) as? Subroutine
+    fun targetSubroutine(program: Program): Subroutine? = targetStatement(program) as? Subroutine
 
     override fun equals(other: Any?) = other is IdentifierReference && other.nameInSource==nameInSource
     override fun hashCode() = nameInSource.hashCode()
@@ -754,14 +754,14 @@ data class IdentifierReference(val nameInSource: List<String>, override val posi
             nameInSource.size==scopedName.size && nameInSource.toTypedArray().contentEquals(scopedName)
 
     override fun inferType(program: Program): InferredTypes.InferredType {
-        return when (val targetStmt = targetStatement(program.namespace)) {
+        return when (val targetStmt = targetStatement(program)) {
             is VarDecl -> InferredTypes.knownFor(targetStmt.datatype)
             is StructDecl -> InferredTypes.knownFor(DataType.STRUCT)
             else -> InferredTypes.InferredType.unknown()
         }
     }
 
-    fun memberOfStruct(namespace: INameScope) = this.targetVarDecl(namespace)?.struct
+    fun memberOfStruct(program: Program) = this.targetVarDecl(program)?.struct
 
     fun heapId(namespace: INameScope): Int {
         val node = namespace.lookup(nameInSource, this) ?: throw UndefinedSymbolError(this)
@@ -774,11 +774,11 @@ data class IdentifierReference(val nameInSource: List<String>, override val posi
         }
     }
 
-    fun firstStructVarName(namespace: INameScope): String? {
+    fun firstStructVarName(program: Program): String? {
         // take the name of the first struct member of the structvariable instead
         // if it's just a regular variable, return null.
-        val struct = memberOfStruct(namespace) ?: return null
+        val struct = memberOfStruct(program) ?: return null
-        val decl = targetVarDecl(namespace)!!
+        val decl = targetVarDecl(program)!!
         if(decl.datatype!=DataType.STRUCT)
             return null
 
@@ -816,18 +816,9 @@ class FunctionCall(override var target: IdentifierReference,
     private fun constValue(program: Program, withDatatypeCheck: Boolean): NumericLiteralValue? {
         // if the function is a built-in function and the args are consts, should try to const-evaluate!
         // lenghts of arrays and strings are constants that are determined at compile time!
-        if(target.nameInSource.size>1) return null
+        if(target.nameInSource.size>1)
-        try {
+            return null
-            var resultValue: NumericLiteralValue? = null
+        val resultValue: NumericLiteralValue? = program.builtinFunctions.constValue(target.nameInSource[0], args, position)
-            val func = BuiltinFunctions[target.nameInSource[0]]
-            if(func!=null) {
-                val exprfunc = func.constExpressionFunc
-                if(exprfunc!=null)
-                    resultValue = exprfunc(args, position, program)
-                else if(func.known_returntype==null)
-                    throw ExpressionError("builtin function ${target.nameInSource[0]} can't be used here because it doesn't return a value", position)
-            }
-
         if(withDatatypeCheck) {
             val resultDt = this.inferType(program)
             if(resultValue==null || resultDt istype resultValue.type)
@@ -837,15 +828,6 @@ class FunctionCall(override var target: IdentifierReference,
             return resultValue
         }
     }
-        catch(x: NotConstArgumentException) {
-            // const-evaluating the builtin function call failed.
-            return null
-        }
-        catch(x: CannotEvaluateException) {
-            // const-evaluating the builtin function call failed.
-            return null
-        }
-    }
 
     override fun toString(): String {
         return "FunctionCall(target=$target, pos=$position)"
@@ -860,14 +842,14 @@ class FunctionCall(override var target: IdentifierReference,
         val constVal = constValue(program ,false)
         if(constVal!=null)
             return InferredTypes.knownFor(constVal.type)
-        val stmt = target.targetStatement(program.namespace) ?: return InferredTypes.unknown()
+        val stmt = target.targetStatement(program) ?: return InferredTypes.unknown()
         when (stmt) {
             is BuiltinFunctionStatementPlaceholder -> {
                 if(target.nameInSource[0] == "set_carry" || target.nameInSource[0]=="set_irqd" ||
                         target.nameInSource[0] == "clear_carry" || target.nameInSource[0]=="clear_irqd") {
                     return InferredTypes.void() // these have no return value
                 }
-                return builtinFunctionReturnType(target.nameInSource[0], this.args, program)
+                return program.builtinFunctions.returnType(target.nameInSource[0], this.args)
             }
             is Subroutine -> {
                 if(stmt.returntypes.isEmpty())

compilerAst/src/prog8/ast/statements/AstStatements.kt

@@ -3,10 +3,8 @@ package prog8.ast.statements
 import prog8.ast.*
 import prog8.ast.base.*
 import prog8.ast.expressions.*
-import prog8.ast.processing.AstWalker
+import prog8.ast.walk.AstWalker
-import prog8.ast.processing.IAstVisitor
+import prog8.ast.walk.IAstVisitor
-import prog8.compiler.CompilerException
-import prog8.compiler.target.CompilationTarget
 
 
 sealed class Statement : Node {
@@ -36,8 +34,8 @@ sealed class Statement : Node {
 class BuiltinFunctionStatementPlaceholder(val name: String, override val position: Position) : Statement() {
     override var parent: Node = ParentSentinel
     override fun linkParents(parent: Node) {}
-    override fun accept(visitor: IAstVisitor) = visitor.visit(this)
+    override fun accept(visitor: IAstVisitor) = throw FatalAstException("should not iterate over this node")
-    override fun accept(visitor: AstWalker, parent: Node) = visitor.visit(this, parent)
+    override fun accept(visitor: AstWalker, parent: Node) = throw FatalAstException("should not iterate over this node")
     override fun definingScope(): INameScope = BuiltinFunctionScopePlaceholder
     override fun replaceChildNode(node: Node, replacement: Node) {
         replacement.parent = this
@@ -252,7 +250,7 @@ open class VarDecl(val type: VarDeclType,
         if(allowInitializeWithZero)
             return defaultZero(declaredDatatype, position)
         else
-            throw CompilerException("attempt to get zero value for vardecl that shouldn't get it")
+            throw IllegalArgumentException("attempt to get zero value for vardecl that shouldn't get it")
     }
 
     fun flattenStructMembers(): MutableList<Statement> {
@@ -518,44 +516,6 @@ data class AssignTarget(var identifier: IdentifierReference?,
         }
         return false
     }
-
-    fun isInRegularRAM(namespace: INameScope): Boolean {
-        when {
-            this.memoryAddress != null -> {
-                return when (this.memoryAddress.addressExpression) {
-                    is NumericLiteralValue -> {
-                        CompilationTarget.instance.machine.isRegularRAMaddress((this.memoryAddress.addressExpression as NumericLiteralValue).number.toInt())
-                    }
-                    is IdentifierReference -> {
-                        val decl = (this.memoryAddress.addressExpression as IdentifierReference).targetVarDecl(namespace)
-                        if ((decl?.type == VarDeclType.VAR || decl?.type == VarDeclType.CONST) && decl.value is NumericLiteralValue)
-                            CompilationTarget.instance.machine.isRegularRAMaddress((decl.value as NumericLiteralValue).number.toInt())
-                        else
-                            false
-                    }
-                    else -> false
-                }
-            }
-            this.arrayindexed != null -> {
-                val targetStmt = this.arrayindexed!!.arrayvar.targetVarDecl(namespace)
-                return if (targetStmt?.type == VarDeclType.MEMORY) {
-                    val addr = targetStmt.value as? NumericLiteralValue
-                    if (addr != null)
-                        CompilationTarget.instance.machine.isRegularRAMaddress(addr.number.toInt())
-                    else
-                        false
-                } else true
-            }
-            this.identifier != null -> {
-                val decl = this.identifier!!.targetVarDecl(namespace)!!
-                return if (decl.type == VarDeclType.MEMORY && decl.value is NumericLiteralValue)
-                    CompilationTarget.instance.machine.isRegularRAMaddress((decl.value as NumericLiteralValue).number.toInt())
-                else
-                    true
-            }
-            else -> return true
-        }
-    }
 }
 
 

compilerAst/src/prog8/ast/walk/AstWalker.kt

@@ -1,4 +1,4 @@
-package prog8.ast.processing
+package prog8.ast.walk
 
 import prog8.ast.*
 import prog8.ast.base.FatalAstException
@@ -16,7 +16,8 @@ interface IAstModification {
         }
     }
 
-    class SetExpression(private val setter: (newExpr: Expression) -> Unit, private val newExpr: Expression, private val parent: Node) : IAstModification {
+    class SetExpression(private val setter: (newExpr: Expression) -> Unit, private val newExpr: Expression, private val parent: Node) :
+        IAstModification {
         override fun perform() {
             setter(newExpr)
             newExpr.linkParents(parent)
@@ -37,7 +38,8 @@ interface IAstModification {
         }
     }
 
-    class InsertAfter(private val after: Statement, private val stmt: Statement, private val parent: INameScope) : IAstModification {
+    class InsertAfter(private val after: Statement, private val stmt: Statement, private val parent: INameScope) :
+        IAstModification {
         override fun perform() {
             val idx = parent.statements.indexOfFirst { it===after } + 1
             parent.statements.add(idx, stmt)
@@ -45,7 +47,8 @@ interface IAstModification {
         }
     }
 
-    class InsertBefore(private val before: Statement, private val stmt: Statement, private val parent: INameScope) : IAstModification {
+    class InsertBefore(private val before: Statement, private val stmt: Statement, private val parent: INameScope) :
+        IAstModification {
         override fun perform() {
             val idx = parent.statements.indexOfFirst { it===before }
             parent.statements.add(idx, stmt)
@@ -53,7 +56,8 @@ interface IAstModification {
         }
     }
 
-    class ReplaceNode(private val node: Node, private val replacement: Node, private val parent: Node) : IAstModification {
+    class ReplaceNode(private val node: Node, private val replacement: Node, private val parent: Node) :
+        IAstModification {
         override fun perform() {
             parent.replaceChildNode(node, replacement)
             replacement.linkParents(parent)
@@ -80,7 +84,6 @@ abstract class AstWalker {
     open fun before(block: Block, parent: Node): Iterable<IAstModification> = emptyList()
     open fun before(branchStatement: BranchStatement, parent: Node): Iterable<IAstModification> = emptyList()
     open fun before(breakStmt: Break, parent: Node): Iterable<IAstModification> = emptyList()
-    open fun before(builtinFunctionStatementPlaceholder: BuiltinFunctionStatementPlaceholder, parent: Node): Iterable<IAstModification> = emptyList()
     open fun before(decl: VarDecl, parent: Node): Iterable<IAstModification> = emptyList()
     open fun before(directive: Directive, parent: Node): Iterable<IAstModification> = emptyList()
     open fun before(expr: BinaryExpression, parent: Node): Iterable<IAstModification> = emptyList()
@@ -391,11 +394,6 @@ abstract class AstWalker {
         track(after(inlineAssembly, parent), inlineAssembly, parent)
     }
 
-    fun visit(builtinFunctionStatementPlaceholder: BuiltinFunctionStatementPlaceholder, parent: Node) {
-        track(before(builtinFunctionStatementPlaceholder, parent), builtinFunctionStatementPlaceholder, parent)
-        track(after(builtinFunctionStatementPlaceholder, parent), builtinFunctionStatementPlaceholder, parent)
-    }
-
     fun visit(nopStatement: NopStatement, parent: Node) {
         track(before(nopStatement, parent), nopStatement, parent)
         track(after(nopStatement, parent), nopStatement, parent)

compilerAst/src/prog8/ast/walk/IAstVisitor.kt

@@ -1,4 +1,4 @@
-package prog8.ast.processing
+package prog8.ast.walk
 
 import prog8.ast.Module
 import prog8.ast.Program
@@ -158,9 +158,6 @@ interface IAstVisitor {
     fun visit(inlineAssembly: InlineAssembly) {
     }
 
-    fun visit(builtinFunctionStatementPlaceholder: BuiltinFunctionStatementPlaceholder) {
-    }
-
     fun visit(nopStatement: NopStatement) {
     }
 

compilerAst/src/prog8/parser/CommentHandlingTokenStream.kt

@@ -3,7 +3,6 @@ package prog8.parser
 import org.antlr.v4.runtime.CommonTokenStream
 import org.antlr.v4.runtime.Lexer
 
-
 internal class CommentHandlingTokenStream(lexer: Lexer) : CommonTokenStream(lexer) {
 
     data class Comment(val type: String, val line: Int, val comment: String)

compilerAst/src/prog8/parser/ModuleParsing.kt

@@ -1,34 +1,33 @@
 package prog8.parser
 
 import org.antlr.v4.runtime.*
+import prog8.ast.IStringEncoding
 import prog8.ast.Module
 import prog8.ast.Program
 import prog8.ast.antlr.toAst
 import prog8.ast.base.Position
 import prog8.ast.base.SyntaxError
-import prog8.ast.base.checkImportedValid
 import prog8.ast.statements.Directive
 import prog8.ast.statements.DirectiveArg
-import prog8.compiler.target.CompilationTarget
-import prog8.pathFrom
 import java.io.InputStream
+import java.nio.file.FileSystems
 import java.nio.file.Files
 import java.nio.file.Path
 import java.nio.file.Paths
 
 
-internal class ParsingFailedError(override var message: String) : Exception(message)
+class ParsingFailedError(override var message: String) : Exception(message)
-
 
 internal class CustomLexer(val modulePath: Path, input: CharStream?) : prog8Lexer(input)
 
+fun moduleName(fileName: Path) = fileName.toString().substringBeforeLast('.')
 
-internal fun moduleName(fileName: Path) = fileName.toString().substringBeforeLast('.')
+internal fun pathFrom(stringPath: String, vararg rest: String): Path  = FileSystems.getDefault().getPath(stringPath, *rest)
 
 
-internal class ModuleImporter {
+class ModuleImporter {
 
-    internal fun importModule(program: Program, filePath: Path): Module {
+    fun importModule(program: Program, filePath: Path, encoder: IStringEncoding, compilationTargetName: String): Module {
         print("importing '${moduleName(filePath.fileName)}'")
         if(filePath.parent!=null) {
             var importloc = filePath.toString()
@@ -43,14 +42,15 @@ internal class ModuleImporter {
             throw ParsingFailedError("No such file: $filePath")
 
         val input = CharStreams.fromPath(filePath)
-        return importModule(program, input, filePath, false)
+        return importModule(program, input, filePath, false, encoder, compilationTargetName)
     }
 
-    internal fun importLibraryModule(program: Program, name: String): Module? {
+    fun importLibraryModule(program: Program, name: String,
+                                     encoder: IStringEncoding, compilationTargetName: String): Module? {
         val import = Directive("%import", listOf(
                 DirectiveArg("", name, 42, position = Position("<<<implicit-import>>>", 0, 0, 0))
         ), Position("<<<implicit-import>>>", 0, 0, 0))
-        return executeImportDirective(program, import, Paths.get(""))
+        return executeImportDirective(program, import, Paths.get(""), encoder, compilationTargetName)
     }
 
     private class MyErrorListener: ConsoleErrorListener() {
@@ -65,7 +65,8 @@ internal class ModuleImporter {
         }
     }
 
-    private fun importModule(program: Program, stream: CharStream, modulePath: Path, isLibrary: Boolean): Module {
+    private fun importModule(program: Program, stream: CharStream, modulePath: Path, isLibrary: Boolean,
+                             encoder: IStringEncoding, compilationTargetName: String): Module {
         val moduleName = moduleName(modulePath.fileName)
         val lexer = CustomLexer(modulePath, stream)
         lexer.removeErrorListeners()
@@ -84,7 +85,7 @@ internal class ModuleImporter {
         // tokens.commentTokens().forEach { println(it) }
 
         // convert to Ast
-        val moduleAst = parseTree.toAst(moduleName, isLibrary, modulePath)
+        val moduleAst = parseTree.toAst(moduleName, isLibrary, modulePath, encoder)
         moduleAst.program = program
         moduleAst.linkParents(program.namespace)
         program.modules.add(moduleAst)
@@ -94,13 +95,14 @@ internal class ModuleImporter {
         lines.asSequence()
                 .mapIndexed { i, it -> i to it }
                 .filter { (it.second as? Directive)?.directive == "%import" }
-                .forEach { executeImportDirective(program, it.second as Directive, modulePath) }
+                .forEach { executeImportDirective(program, it.second as Directive, modulePath, encoder, compilationTargetName) }
 
         moduleAst.statements = lines
         return moduleAst
     }
 
-    private fun executeImportDirective(program: Program, import: Directive, source: Path): Module? {
+    private fun executeImportDirective(program: Program, import: Directive, source: Path,
+                                       encoder: IStringEncoding, compilationTargetName: String): Module? {
         if(import.directive!="%import" || import.args.size!=1 || import.args[0].name==null)
             throw SyntaxError("invalid import directive", import.position)
         val moduleName = import.args[0].name!!
@@ -111,27 +113,36 @@ internal class ModuleImporter {
         if(existing!=null)
             return null
 
-        val rsc = tryGetModuleFromResource("$moduleName.p8")
+        val rsc = tryGetModuleFromResource("$moduleName.p8", compilationTargetName)
         val importedModule =
                 if(rsc!=null) {
                     // load the module from the embedded resource
                     val (resource, resourcePath) = rsc
                     resource.use {
                         println("importing '$moduleName' (library)")
-                        importModule(program, CharStreams.fromStream(it), Paths.get("@embedded@/$resourcePath"), true)
+                        importModule(program, CharStreams.fromStream(it), Paths.get("@embedded@/$resourcePath"),
+                            true, encoder, compilationTargetName)
                     }
                 } else {
                     val modulePath = tryGetModuleFromFile(moduleName, source, import.position)
-                    importModule(program, modulePath)
+                    importModule(program, modulePath, encoder, compilationTargetName)
                 }
 
-        importedModule.checkImportedValid()
+        removeDirectivesFromImportedModule(importedModule)
         return importedModule
     }
 
-    private fun tryGetModuleFromResource(name: String): Pair<InputStream, String>? {
+    private fun removeDirectivesFromImportedModule(importedModule: Module) {
-        val target = CompilationTarget.instance.name
+        // Most global directives don't apply for imported modules, so remove them
-        val targetSpecificPath = "/prog8lib/$target/$name"
+        val moduleLevelDirectives = listOf("%output", "%launcher", "%zeropage", "%zpreserved", "%address", "%target")
+        var directives = importedModule.statements.filterIsInstance<Directive>()
+        importedModule.statements.removeAll(directives)
+        directives = directives.filter{ it.directive !in moduleLevelDirectives }
+        importedModule.statements.addAll(0, directives)
+    }
+
+    private fun tryGetModuleFromResource(name: String, compilationTargetName: String): Pair<InputStream, String>? {
+        val targetSpecificPath = "/prog8lib/$compilationTargetName/$name"
         val targetSpecificResource = object{}.javaClass.getResourceAsStream(targetSpecificPath)
         if(targetSpecificResource!=null)
             return Pair(targetSpecificResource, targetSpecificPath)

dbusCompilerService/build.gradle

@@ -2,7 +2,7 @@
 plugins {
     id 'java'
     id 'application'
-    id "org.jetbrains.kotlin.jvm" version "1.4.21"
+    id "org.jetbrains.kotlin.jvm" version "1.4.30"
     id 'com.github.johnrengelman.shadow' version '6.1.0'
 }
 

docs/source/programming.rst

@@ -803,6 +803,17 @@ mkword(msb, lsb)
         Don't get confused by how the system actually stores this 16-bit word value in memory (which is
         in little-endian format, so lsb first then msb)
 
+peek(address)
+    same as @(address) - reads the byte at the given address in memory.
+
+peekw(address)
+    reads the word value at the given address in memory. Word is read as usual little-endian lsb/msb byte order.
+
+poke(address, value)
+    same as @(address)=value - writes the byte value at the given address in memory.
+
+pokew(address, value)
+    writes the word value at the given address in memory, in usual little-endian lsb/msb byte order.
 
 rnd()
     returns a pseudo-random byte from 0..255

docs/source/todo.rst

@@ -2,16 +2,14 @@
 TODO
 ====
 
-- add any2(), all2(), max2(), min2(), reverse2(), sum2(), sort2() that take (array, startindex, length) arguments
+- refactor the asmgen into their own submodule?
-- optimize for loop iterations better to allow proper inx, cpx #value, bne loop  instructions  (like repeat loop)
+- refactor the compiler optimizers into their own submodule?
-- why is there a beq  _prog8_label_2_repeatend  at the end of repeat loops? seems unused
 - optimize swap of two memread values with index, using the same pointer expression/variable, like swap(@(ptr+1), @(ptr+2))
-- implement the linked_list millfork benchmark
+- optimize several inner loops in gfx2 (highres 4 color mode)
 - use the 65c02 bit clear/set/test instructions for single-bit operations
-
+- try to fix the bresenham line routines in graphics and gfx2 (sometimes they're a pixel 'off')
-- implement highres 4 color mode in gfx2
+- add a flood fill routine to gfx2?
-- make a retro amiga workbench 1.3 and/or 2.0 workbench "simulator" using that new gfx mode
+- add sound to the cx16 tehtriz
-- can we get rid of the --longOptionName command line options and only keep the short versions? https://github.com/Kotlin/kotlinx-cli/issues/50
 - add a f_seek() routine for the Cx16 that uses its seek dos api?
 - optimizer: detect variables that are written but never read - mark those as unused too and remove them, such as uword unused = memory("unused222", 20) - also remove the memory slab allocation
 - add a compiler option to not remove unused subroutines. this allows for building library programs

examples/cx16/amiga.p8

@@ -0,0 +1,207 @@
+%import textio
+%import palette
+%import string
+%import gfx2
+
+; Mockup of a classic Amiga Workbench screen.
+
+main {
+
+    sub start() {
+        gfx2.screen_mode(6)             ; select 640*480 mode, 4 colors
+        uword[4] amigacolors = [$aaa, $000, $fff, $68c]     ; gray, black, white, lightblue
+        palette.set_rgb(amigacolors, len(amigacolors))
+
+        cx16.VERA_DC_VSCALE = 64        ; have the vertical resolution so it is 640*240 - more or less Amiga's default non interlaced mode
+        gfx2.text_charset(3)
+
+        screen_titlebar()
+        window_workbench()
+        window_system()
+        window_shell()
+        gfx2.text(280, 210, 1, @"640x480(240) 4 colors")
+        gfx2.text(280, 220, 1, @"Mockup drawn using Prog8 gfx2 library")
+
+        repeat {
+        }
+    }
+
+    sub screen_titlebar() {
+        gfx2.fillrect(0, 0, gfx2.width, 10, 2)
+        gfx2.text(8,1, 1, @"AmigaOS 3.1    2,002,448 graphics mem  16,504,384 other mem")
+        gfx2.horizontal_line(0, 10, gfx2.width, 1)
+        widget.window_order_icon(gfx2.width-widget.window_order_icon.width, 0, false)
+    }
+
+
+    sub window_workbench() {
+        const uword win_x = 10
+        const uword win_y = 16
+        const uword width = 600
+        const uword height = 220
+
+        widget.window_titlebar(win_x, win_y, width, @"Workbench", false)
+        ; gfx2.fillrect(win_x+3, win_y+11, width-4, height-11-2,0)    ; clear window pane
+        widget.window_leftborder(win_x, win_y, height, false)
+        widget.window_bottomborder(win_x, win_y, width, height)
+        widget.window_rightborder(win_x, win_y, width, height, false)
+
+        vector_v(win_x+width - 390, win_y+height-20)
+        vector_v(win_x+width - 390 -14, win_y+height-20)
+
+        widget.icon(45,40, @"Ram Disk")
+        widget.icon(45,90, @"Workbench3.1")
+    }
+
+    sub vector_v(uword x, uword y) {
+        gfx2.horizontal_line(x, y, 12, 1)
+        gfx2.horizontal_line(x+16, y+16, 12,1)
+        gfx2.line(x,y,x+16,y+16,1)
+        gfx2.line(x+11,y,x+16+6,y+10,1)
+        gfx2.line(x+16+6,y+10,x+48,y-16,1)
+        gfx2.line(x+16+11,y+16,x+48+11,y-16,1)
+    }
+
+    sub window_system() {
+        const uword width = 300
+        const uword height = 120
+        const uword win_x = 320
+        const uword win_y = 40
+
+        widget.window_titlebar(win_x, win_y, width, @"System", false)
+        gfx2.fillrect(win_x+3, win_y+11, width-4, height-11-2, 0)    ; clear window pane
+        widget.window_leftborder(win_x, win_y, height, false)
+        widget.window_bottomborder(win_x, win_y, width, height)
+        widget.window_rightborder(win_x, win_y, width, height, false)
+
+        widget.icon(win_x+16, win_y+14, @"FixFonts")
+        widget.icon(win_x+16+80, win_y+14, @"NoFastMem")
+        widget.icon(win_x+16, win_y+56, @"Format")
+        widget.icon(win_x+16+80, win_y+56, @"RexxMast")
+        widget.icon(win_x+16+160, win_y+56, @"Shell")
+    }
+
+    sub window_shell() {
+        const uword win_x = 64-4
+        const uword win_y = 140
+        const uword width = 500
+        const uword height = 65
+
+        widget.window_titlebar(win_x, win_y, width, @"AmigaShell", true)
+        gfx2.fillrect(win_x+3, win_y+11, width-4, height-11-2,0)    ; clear window pane
+        widget.window_leftborder(win_x, win_y, height, true)
+        widget.window_bottomborder(win_x, win_y, width, height)
+        widget.window_rightborder(win_x, win_y, width, height, true)
+
+        gfx2.text(win_x+5, win_y+12, 1, @"New Shell process 3")
+        gfx2.text(win_x+5, win_y+12+8, 1, @"3.Workbench3.1:>")
+        gfx2.fillrect(win_x+5+17*8, win_y+12+8, 8, 8, 1)        ; cursor
+    }
+}
+
+
+
+widget {
+
+    sub highlightedrect(uword x, uword y, uword width, uword height, ubyte fill, ubyte active) {
+        gfx2.horizontal_line(x, y, width, 2)
+        gfx2.vertical_line(x, y+1, height-1, 2)
+        gfx2.vertical_line(x+width-1, y+1, height-1, 1)
+        gfx2.horizontal_line(x+1, y+height-1, width-2, 1)
+        if fill {
+            if active
+                gfx2.fillrect(x+1,y+1,width-2,height-2, 3)
+            else
+                gfx2.fillrect(x+1,y+1,width-2,height-2, 0)
+        }
+    }
+
+    sub icon(uword x, uword y, uword caption) {
+        const ubyte width = 56
+        const ubyte height = 28
+        highlightedrect(x, y, width, height, false, false)
+        uword middlex = x+width/2+1
+        ubyte halfstring = string.length(caption) * 4
+        gfx2.text(middlex-halfstring,y+height+1,1,caption)
+        gfx2.disc(x+width/4+4, y+height/2, height/2-3, 1)
+        gfx2.fillrect(x+20,y+12,width/2,height/2-4,3)
+    }
+
+
+    sub window_titlebar(uword x, uword y, uword width, uword titlestr, ubyte active) {
+        const ubyte height = 11
+        widget.highlightedrect(x+widget.window_close_icon.width, y, width-64, height, true, active)
+        gfx2.plot(x+widget.window_close_icon.width, y+height-1, 1) ; correct bottom left corner
+        gfx2.text(x+32, y+1, 1, titlestr)
+        widget.window_close_icon(x, y, active)
+        widget.window_order_icon(x+width-22, y, active)
+        widget.window_flipsize_icon(x+width-44, y, active)
+    }
+
+    sub window_flipsize_icon(uword x, uword y, ubyte active) {
+        const uword width = 22
+        const uword height = 11
+        highlightedrect(x, y, width, height, true, active)
+        gfx2.plot(x, y+height-1, 1) ; correct bottom left corner
+        gfx2.rect(x+5, y+2, width-9, height-4, 1)
+        gfx2.rect(x+5, y+2, 7, 4, 1)
+        gfx2.fillrect(x+6, y+3, 5, 2, 2)
+    }
+
+    sub window_order_icon(uword x, uword y, ubyte active) {
+        const uword width = 22
+        const uword height = 11
+        highlightedrect(x, y, width, height, true, active)
+        gfx2.plot(x, y+height-1, 1) ; correct bottom left corner
+        gfx2.rect(x+4, y+2, 10, 5, 1)       ; back
+        gfx2.fillrect(x+9, y+5, 8, 3, 2)       ; white front
+        gfx2.rect(x+8, y+4, 10, 5, 1)       ; front
+    }
+
+    sub window_close_icon(uword x, uword y, ubyte active) {
+        const uword width = 20
+        const uword height = 11
+        highlightedrect(x, y, width, height, true, active)
+        gfx2.plot(x, y+height-1, 1) ; correct bottom left corner
+        gfx2.rect(x+7, y+3, 5, 5, 1)
+        gfx2.fillrect(x+8, y+4, 3, 3, 2)
+    }
+
+    sub window_leftborder(uword x, uword y, uword height, ubyte active) {
+        gfx2.vertical_line(x, y, height, 2)
+        ubyte color = 0
+        if active
+            color = 3
+        gfx2.vertical_line(x+1, y+11, height-11, color)
+        gfx2.vertical_line(x+2, y+11, height-11, 1)
+    }
+
+    sub window_bottomborder(uword x, uword y, uword width, uword height) {
+        gfx2.horizontal_line(x+3, y+height-2, width-3, 2)
+        gfx2.horizontal_line(x, y+height-1, width, 1)
+    }
+
+    sub window_rightborder(uword x, uword y, uword width, uword height, ubyte active) {
+        gfx2.vertical_line(x+width-1-16, y+11, height-13,2)
+        gfx2.vertical_line(x+width-1, y+11, height-11,1)
+        ubyte color = 0
+        if active
+            color = 3
+        gfx2.fillrect(x+width-1-15, y+11, 15, height-12, color)
+
+        gfx2.horizontal_line(x+width-1-13, y+height-3, 11, 1)
+        gfx2.vertical_line(x+width-1-3, y+height-3-5, 5, 1)
+        gfx2.line(x+width-1-13,y+height-3, x+width-1-3, y+height-3-5, 1)
+        gfx2.horizontal_line(x+width-1-16, y+height-10, 16, 2)
+
+        highlightedrect(x+width-13, y+12, 10, height-43, false, false)
+        gfx2.horizontal_line(x+width-1-16, y+height-11, 16, 1)
+        gfx2.horizontal_line(x+width-1-16, y+height-20, 16, 2)
+        gfx2.horizontal_line(x+width-1-16, y+height-21, 16, 1)
+        gfx2.horizontal_line(x+width-1-16, y+height-30, 16, 2)
+        gfx2.line(x+width-1-12, y+height-23, x+width-8, y+height-28, 1)
+        gfx2.line(x+width-1-3, y+height-23, x+width-9, y+height-28, 1)
+        gfx2.line(x+width-1-13, y+height-18, x+width-8, y+height-13, 1)
+        gfx2.line(x+width-1-3, y+height-18, x+width-9, y+height-13, 1)
+    }
+}

examples/cx16/highresbitmap.p8

@@ -11,12 +11,12 @@ main {
 
         test_monochrome()
 
-        gfx2.screen_mode(255)
+        gfx2.screen_mode(0)
         txt.print("done!\n")
     }
 
     sub test_monochrome() {
-        gfx2.screen_mode(128)
+        gfx2.screen_mode(5)
         uword yy
         uword xx
         word ww

examples/cx16/tehtriz.p8

@@ -0,0 +1,642 @@
+; TehTriz - a Tetris clone.  Commander X16 version.
+;
+; features:
+;   holding area
+;   wall kick rotations
+;   shows next piece
+;   staged speed increase
+;   TODO:  replicate the simple sound effects from the C64 version
+
+
+%target cx16
+%import syslib
+%import textio
+%import test_stack
+
+
+main {
+
+    const ubyte boardOffsetX = 14
+    const ubyte boardOffsetY = 3
+    const ubyte boardWidth = 10
+    const ubyte boardHeight = 20
+    const ubyte startXpos = boardOffsetX + 3
+    const ubyte startYpos = boardOffsetY - 2
+    uword lines
+    uword score
+    ubyte xpos
+    ubyte ypos
+    ubyte nextBlock
+    ubyte speedlevel
+    ubyte holding
+    ubyte holdingAllowed
+
+
+    sub start() {
+        cx16.screen_set_mode(0)       ; low res
+        sound.init()
+        newGame()
+        drawBoard()
+        gameOver()
+
+newgame:
+        newGame()
+        drawBoard()
+        spawnNextBlock()
+
+waitkey:
+        ubyte time_lo = lsb(c64.RDTIM16())
+        if time_lo>=(60-4*speedlevel) {
+            c64.SETTIM(0,0,0)
+
+            drawBlock(xpos, ypos, 32) ; hide block
+            if blocklogic.noCollision(xpos, ypos+1) {
+                ; slowly move the block down
+                ypos++
+                drawBlock(xpos, ypos, 160)  ; show block on new position
+            } else {
+                ; block can't move further down!
+                ; check if the game area is full, if not, spawn the next block at the top.
+                if blocklogic.isGameOver(xpos, ypos) {
+                    gameOver()
+                    goto newgame
+                } else {
+                    sound.blockrotate()
+                    checkForLines()
+                    spawnNextBlock()
+                    score++
+                }
+            }
+
+            drawScore()
+
+            ; txt.plot(0,0)
+            ; test_stack.test()
+        }
+
+        ubyte key=c64.GETIN()
+        if key==0 goto waitkey
+
+        keypress(key)
+
+        goto waitkey
+
+    }
+
+    sub move_left() {
+        drawBlock(xpos, ypos, 32)
+        if blocklogic.noCollision(xpos-1, ypos) {
+            xpos--
+        }
+        drawBlock(xpos, ypos, 160)
+    }
+
+    sub move_right() {
+        drawBlock(xpos, ypos, 32)
+        if blocklogic.noCollision(xpos+1, ypos) {
+            xpos++
+        }
+        drawBlock(xpos, ypos, 160)
+    }
+
+    sub move_down_faster() {
+        drawBlock(xpos, ypos, 32)
+        if blocklogic.noCollision(xpos, ypos+1) {
+            ypos++
+        }
+        drawBlock(xpos, ypos, 160)
+    }
+
+    sub drop_down_immediately() {
+        drawBlock(xpos, ypos, 32)
+        ubyte dropypos
+        for dropypos in ypos+1 to boardOffsetY+boardHeight-1 {
+            if not blocklogic.noCollision(xpos, dropypos) {
+                dropypos--   ; the furthest down that still fits
+                break
+            }
+        }
+
+        if dropypos>ypos {
+            ypos = dropypos
+            sound.blockdrop()
+            drawBlock(xpos, ypos, 160)
+            checkForLines()
+            spawnNextBlock()
+            score++
+            drawScore()
+        }
+    }
+
+    sub keypress(ubyte key) {
+        when key {
+            157, ',' -> move_left()
+            29, '/'  -> move_right()
+            17, '.'  -> move_down_faster()
+            145, ' ' -> drop_down_immediately()
+            'z' -> {
+                ; no joystick equivalent (there is only 1 fire button)
+                ; rotate counter clockwise
+                drawBlock(xpos, ypos, 32)
+                if blocklogic.canRotateCCW(xpos, ypos) {
+                    blocklogic.rotateCCW()
+                    sound.blockrotate()
+                }
+                else if blocklogic.canRotateCCW(xpos-1, ypos) {
+                    xpos--
+                    blocklogic.rotateCCW()
+                    sound.blockrotate()
+                }
+                else if blocklogic.canRotateCCW(xpos+1, ypos) {
+                    xpos++
+                    blocklogic.rotateCCW()
+                    sound.blockrotate()
+                }
+                drawBlock(xpos, ypos, 160)
+            }
+            'x' -> {
+                ; rotate clockwise
+                drawBlock(xpos, ypos, 32)
+                if blocklogic.canRotateCW(xpos, ypos) {
+                    blocklogic.rotateCW()
+                    sound.blockrotate()
+                }
+                else if blocklogic.canRotateCW(xpos-1, ypos) {
+                    xpos--
+                    blocklogic.rotateCW()
+                    sound.blockrotate()
+                }
+                else if blocklogic.canRotateCW(xpos+1, ypos) {
+                    xpos++
+                    blocklogic.rotateCW()
+                    sound.blockrotate()
+                }
+                drawBlock(xpos, ypos, 160)
+            }
+            'c' -> {
+                ; hold
+                if holdingAllowed {
+                    sound.swapping()
+                    if holding<7 {
+                        drawBlock(xpos, ypos, 32)
+                        ubyte newholding = blocklogic.currentBlockNum
+                        swapBlock(holding)
+                        holding = newholding
+                        holdingAllowed = false
+                    } else {
+                        holding = blocklogic.currentBlockNum
+                        drawBlock(xpos, ypos, 32)
+                        spawnNextBlock()
+                    }
+                    drawHoldBlock()
+                }
+            }
+        }
+    }
+
+    sub checkForLines() {
+        ; check if line(s) are full -> flash/clear line(s) + add score + move rest down
+        ubyte[boardHeight] complete_lines
+        ubyte num_lines=0
+        ubyte linepos
+        sys.memset(complete_lines, len(complete_lines), 0)
+        for linepos in boardOffsetY to boardOffsetY+boardHeight-1 {
+            if blocklogic.isLineFull(linepos) {
+                complete_lines[num_lines]=linepos
+                num_lines++
+                ubyte x
+                for x in boardOffsetX to boardOffsetX+boardWidth-1
+                    txt.setcc(x, linepos, 160, 1)
+            }
+        }
+        if num_lines {
+            if num_lines>3
+                sound.lineclear_big()
+            else
+                sound.lineclear()
+            sys.wait(20) ; slight delay to flash the line
+            for linepos in complete_lines
+                if linepos and blocklogic.isLineFull(linepos)
+                    blocklogic.collapse(linepos)
+            lines += num_lines
+            uword[] scores = [10, 25, 50, 100]      ; can never clear more than 4 lines at once
+            score += scores[num_lines-1]
+            speedlevel = 1+lsb(lines/10)
+            drawScore()
+        }
+    }
+
+    sub gameOver() {
+        sound.gameover()
+        txt.plot(7, 7)
+        c64.CHROUT('U')
+        txt.print("────────────────────────")
+        c64.CHROUT('I')
+        txt.plot(7, 8)
+        txt.print("│*** g a m e  o v e r ***│")
+        txt.plot(7, 9)
+        c64.CHROUT('J')
+        txt.print("────────────────────────")
+        c64.CHROUT('K')
+
+        txt.plot(7, 18)
+        c64.CHROUT('U')
+        txt.print("────────────────────────")
+        c64.CHROUT('I')
+        txt.plot(7, 19)
+        txt.print("│    f1 for new game     │")
+        txt.plot(7, 20)
+        c64.CHROUT('J')
+        txt.print("────────────────────────")
+        c64.CHROUT('K')
+
+        ubyte key = 0
+        while key!=133 {
+            ; endless loop until user presses F1 to restart the game
+            key = c64.GETIN()
+        }
+    }
+
+    sub newGame() {
+        lines = 0
+        score = 0
+        xpos = startXpos
+        ypos = startYpos
+        speedlevel = 1
+        nextBlock = rnd() % 7
+        holding = 255
+        holdingAllowed = true
+    }
+
+    sub swapBlock(ubyte newblock) {
+        blocklogic.newCurrentBlock(newblock)
+        xpos = startXpos
+        ypos = startYpos
+        drawBlock(xpos, ypos, 160)
+    }
+
+    sub spawnNextBlock() {
+        swapBlock(nextBlock)
+        nextBlock = (rnd() + lsb(c64.RDTIM16())) % 7
+        drawNextBlock()
+        holdingAllowed = true
+    }
+
+    sub drawBoard() {
+        txt.clear_screen()
+        txt.color(7)
+        txt.plot(1,1)
+        txt.print("* tehtriz *")
+        txt.color(5)
+        txt.plot(6,4)
+        txt.print("hold:")
+        txt.plot(2,22)
+        txt.print("speed: ")
+        txt.plot(28,3)
+        txt.print("next:")
+        txt.plot(28,10)
+        txt.print("lines:")
+        txt.plot(28,14)
+        txt.print("score:")
+        txt.color(12)
+        txt.plot(27,18)
+        txt.print("controls:")
+        txt.color(11)
+        txt.plot(28,19)
+        txt.print(",/  move")
+        txt.plot(28,20)
+        txt.print("zx  rotate")
+        txt.plot(29,21)
+        txt.print(".  descend")
+        txt.plot(27,22)
+        txt.print("spc  drop")
+        txt.plot(29,23)
+        txt.print("c  hold")
+
+        txt.setcc(boardOffsetX-1, boardOffsetY-2, 255, 0)           ; invisible barrier
+        txt.setcc(boardOffsetX-1, boardOffsetY-3, 255, 0)           ; invisible barrier
+        txt.setcc(boardOffsetX+boardWidth, boardOffsetY-2, 255, 0)  ; invisible barrier
+        txt.setcc(boardOffsetX+boardWidth, boardOffsetY-3, 255, 0)  ; invisible barrier
+
+        txt.setcc(boardOffsetX-1, boardOffsetY-1, 108, 12)
+        txt.setcc(boardOffsetX+boardWidth, boardOffsetY-1, 123, 12)
+        txt.setcc(boardOffsetX+boardWidth, boardOffsetY-1, 123, 12)
+        txt.setcc(boardOffsetX-1, boardOffsetY+boardHeight, 124, 12)
+        txt.setcc(boardOffsetX+boardWidth, boardOffsetY+boardHeight, 126, 12)
+        ubyte i
+        for i in boardOffsetX+boardWidth-1 downto boardOffsetX {
+            txt.setcc(i, boardOffsetY-3, 255, 0)           ; invisible barrier
+            txt.setcc(i, boardOffsetY+boardHeight, 69, 11)
+        }
+        for i in boardOffsetY+boardHeight-1 downto boardOffsetY {
+            txt.setcc(boardOffsetX-1, i, 89, 11)
+            txt.setcc(boardOffsetX+boardWidth, i, 84, 11)
+        }
+
+        ubyte[] colors = [6,8,7,5,4]
+        for i in len(colors)-1 downto 0 {
+            ubyte x
+            for x in 5 downto 0 {
+                txt.setcc(6+x-i, 11+2*i, 102, colors[i])
+            }
+        }
+        drawScore()
+    }
+
+    sub drawScore() {
+        txt.color(1)
+        txt.plot(30,11)
+        txt.print_uw(lines)
+        txt.plot(30,15)
+        txt.print_uw(score)
+        txt.plot(9,22)
+        txt.print_ub(speedlevel)
+    }
+
+    sub drawNextBlock() {
+        const ubyte nextBlockXpos = 29
+        const ubyte nextBlockYpos = 5
+        ubyte x
+        for x in nextBlockXpos+3 downto nextBlockXpos {
+            txt.setcc(x, nextBlockYpos, ' ', 0)
+            txt.setcc(x, nextBlockYpos+1, ' ', 0)
+        }
+
+        ; reuse the normal block draw routine (because we can't manipulate array pointers yet)
+        ubyte prev = blocklogic.currentBlockNum
+        blocklogic.newCurrentBlock(nextBlock)
+        drawBlock(nextBlockXpos, nextBlockYpos, 160)
+        blocklogic.newCurrentBlock(prev)
+    }
+
+    sub drawHoldBlock() {
+        const ubyte holdBlockXpos = 7
+        const ubyte holdBlockYpos = 6
+        ubyte x
+        for x in holdBlockXpos+3 downto holdBlockXpos {
+            txt.setcc(x, holdBlockYpos, '@', 0)
+            txt.setcc(x, holdBlockYpos+1, '@', 0)
+        }
+        if holding < 7 {
+            ; reuse the normal block draw routine (because we can't manipulate array pointers yet)
+            ubyte prev = blocklogic.currentBlockNum
+            blocklogic.newCurrentBlock(holding)
+            drawBlock(holdBlockXpos, holdBlockYpos, 160)
+            blocklogic.newCurrentBlock(prev)
+        }
+    }
+
+    sub drawBlock(ubyte x, ubyte y, ubyte character) {
+        ubyte @zp i
+        for i in 15 downto 0 {
+            ubyte @zp c=blocklogic.currentBlock[i]
+            if c
+                txt.setcc((i&3)+x, (i/4)+y, character, c)
+        }
+    }
+}
+
+
+blocklogic {
+
+    ubyte currentBlockNum
+    ubyte[16] currentBlock
+    ubyte[16] rotated
+
+    ; the 7 tetrominos
+    ubyte[] blockI = [0,0,0,0,        ; cyan ; note: special rotation (around matrix center)
+                      3,3,3,3,
+                      0,0,0,0,
+                      0,0,0,0]
+    ubyte[] blockJ = [6,0,0,0,        ; blue
+                      6,6,6,0,
+                      0,0,0,0,
+                      0,0,0,0]
+    ubyte[] blockL = [0,0,8,0,        ; orange
+                      8,8,8,0,
+                      0,0,0,0,
+                      0,0,0,0]
+    ubyte[] blockO = [0,7,7,0,        ; yellow ; note: no rotation (square)
+                      0,7,7,0,
+                      0,0,0,0,
+                      0,0,0,0]
+    ubyte[] blockS = [0,5,5,0,        ; green
+                      5,5,0,0,
+                      0,0,0,0,
+                      0,0,0,0]
+    ubyte[] blockT = [0,4,0,0,        ; purple
+                      4,4,4,0,
+                      0,0,0,0,
+                      0,0,0,0]
+    ubyte[] blockZ = [2,2,0,0,        ; red
+                      0,2,2,0,
+                      0,0,0,0,
+                      0,0,0,0]
+
+    uword[] blocks = [&blockI, &blockJ, &blockL, &blockO, &blockS, &blockT, &blockZ]
+
+    sub newCurrentBlock(ubyte block) {
+        currentBlockNum = block
+        sys.memcopy(blocks[block], currentBlock, len(currentBlock))
+    }
+
+    sub rotateCW() {
+        ; rotates the current block clockwise.
+        if currentBlockNum==0 {
+            ; the 'I' block rotates a 4x4 matrix around the center
+            rotated[0] = currentBlock[12]
+            rotated[1] = currentBlock[8]
+            rotated[2] = currentBlock[4]
+            rotated[3] = currentBlock[0]
+            rotated[4] = currentBlock[13]
+            rotated[5] = currentBlock[9]
+            rotated[6] = currentBlock[5]
+            rotated[7] = currentBlock[1]
+            rotated[8] = currentBlock[14]
+            rotated[9] = currentBlock[10]
+            rotated[10] = currentBlock[6]
+            rotated[11] = currentBlock[2]
+            rotated[12] = currentBlock[15]
+            rotated[13] = currentBlock[11]
+            rotated[14] = currentBlock[7]
+            rotated[15] = currentBlock[3]
+            sys.memcopy(rotated, currentBlock, len(currentBlock))
+        }
+        else if currentBlockNum!=3 {
+            ; rotate all blocks (except 3, the square) around their center square in a 3x3 matrix
+            sys.memset(rotated, len(rotated), 0)
+            rotated[0] = currentBlock[8]
+            rotated[1] = currentBlock[4]
+            rotated[2] = currentBlock[0]
+            rotated[4] = currentBlock[9]
+            rotated[5] = currentBlock[5]
+            rotated[6] = currentBlock[1]
+            rotated[8] = currentBlock[10]
+            rotated[9] = currentBlock[6]
+            rotated[10] = currentBlock[2]
+            sys.memcopy(rotated, currentBlock, len(currentBlock))
+        }
+    }
+
+    sub rotateCCW() {
+        ; rotates the current block counterclockwise.
+        if currentBlockNum==0 {
+            ; the 'I' block rotates a 4x4 matrix around the center
+            rotated[0] = currentBlock[3]
+            rotated[1] = currentBlock[7]
+            rotated[2] = currentBlock[11]
+            rotated[3] = currentBlock[15]
+            rotated[4] = currentBlock[2]
+            rotated[5] = currentBlock[6]
+            rotated[6] = currentBlock[10]
+            rotated[7] = currentBlock[14]
+            rotated[8] = currentBlock[1]
+            rotated[9] = currentBlock[5]
+            rotated[10] = currentBlock[9]
+            rotated[11] = currentBlock[13]
+            rotated[12] = currentBlock[0]
+            rotated[13] = currentBlock[4]
+            rotated[14] = currentBlock[8]
+            rotated[15] = currentBlock[12]
+            sys.memcopy(rotated, currentBlock, len(currentBlock))
+        }
+        else if currentBlockNum!=3 {
+            ; rotate all blocks (except 3, the square) around their center square in a 3x3 matrix
+            sys.memset(rotated, len(rotated), 0)
+            rotated[0] = currentBlock[2]
+            rotated[1] = currentBlock[6]
+            rotated[2] = currentBlock[10]
+            rotated[4] = currentBlock[1]
+            rotated[5] = currentBlock[5]
+            rotated[6] = currentBlock[9]
+            rotated[8] = currentBlock[0]
+            rotated[9] = currentBlock[4]
+            rotated[10] = currentBlock[8]
+            sys.memcopy(rotated, currentBlock, len(currentBlock))
+        }
+    }
+
+    ; For movement checking it is not needed to clamp the x/y coordinates,
+    ; because we have to check for brick collisions anyway.
+    ; The full play area is bordered by (in)visible characters that will collide.
+    ; Collision is determined by reading the screen data directly.
+
+    sub canRotateCW(ubyte xpos, ubyte ypos) -> ubyte {
+        rotateCW()
+        ubyte nocollision = noCollision(xpos, ypos)
+        rotateCCW()
+        return nocollision
+    }
+
+    sub canRotateCCW(ubyte xpos, ubyte ypos) -> ubyte {
+        rotateCCW()
+        ubyte nocollision = noCollision(xpos, ypos)
+        rotateCW()
+        return nocollision
+    }
+
+    sub noCollision(ubyte xpos, ubyte ypos) -> ubyte {
+        ubyte @zp i
+        for i in 15 downto 0 {
+            if currentBlock[i] and txt.getchr(xpos + (i&3), ypos+i/4)!=32
+                return false
+        }
+        return true
+    }
+
+    sub isGameOver(ubyte xpos, ubyte ypos) -> ubyte {
+        main.drawBlock(xpos, ypos, 32)
+        ubyte result = ypos==main.startYpos and not noCollision(xpos, ypos+1)
+        main.drawBlock(xpos, ypos, 160)
+        return result
+    }
+
+    sub isLineFull(ubyte ypos) -> ubyte {
+        ubyte x
+        for x in main.boardOffsetX to main.boardOffsetX+main.boardWidth-1 {
+            if txt.getchr(x, ypos)==32
+                return false
+        }
+        return true
+    }
+
+    sub collapse(ubyte ypos) {
+        while ypos>main.startYpos+1 {
+            ubyte x
+            for x in main.boardOffsetX+main.boardWidth-1 downto main.boardOffsetX {
+                ubyte char = txt.getchr(x, ypos-1)
+                ubyte color = txt.getclr(x, ypos-1)
+                txt.setcc(x, ypos, char, color)
+            }
+            ypos--
+        }
+    }
+}
+
+
+sound {
+    ; TODO stubs for now
+    sub init() {
+        ; c64.MVOL = 15
+    }
+
+    sub blockrotate() {
+        ; soft click
+;        c64.MVOL = 5
+;        c64.AD1 = %00100010
+;        c64.SR1 = %00000000
+;        c64.FREQ1 = 15600
+;        c64.CR1 = %10000000
+;        c64.CR1 = %10000001
+    }
+
+    sub blockdrop() {
+        ; swish
+;        c64.MVOL = 5
+;        c64.AD1 = %01010111
+;        c64.SR1 = %00000000
+;        c64.FREQ1 = 4600
+;        c64.CR1 = %10000000
+;        c64.CR1 = %10000001
+    }
+
+    sub swapping() {
+        ; beep
+;        c64.MVOL = 8
+;        c64.AD1 = %01010111
+;        c64.SR1 = %00000000
+;        c64.FREQ1 = 5500
+;        c64.CR1 = %00010000
+;        c64.CR1 = %00010001
+    }
+
+    sub lineclear() {
+        ; explosion
+;        c64.MVOL = 15
+;        c64.AD1 = %01100110
+;        c64.SR1 = %00000000
+;        c64.FREQ1 = 1600
+;        c64.CR1 = %10000000
+;        c64.CR1 = %10000001
+    }
+
+    sub lineclear_big() {
+        ; big explosion
+;        c64.MVOL = 15
+;        c64.AD1 = %01101010
+;        c64.SR1 = %00000000
+;        c64.FREQ1 = 2600
+;        c64.CR1 = %10000000
+;        c64.CR1 = %10000001
+    }
+
+    sub gameover() {
+        ; buzz
+;        c64.MVOL = 15
+;        c64.FREQ2 = 600
+;        c64.AD2 = %00111010
+;        c64.SR2 = %00000000
+;        c64.CR2 = %00110000
+;        c64.CR2 = %00110001
+    }
+}

examples/cx16/testgfx2.p8

@@ -7,8 +7,19 @@
 main {
 
     sub start() {
-        gfx2.screen_mode(128)
+        gfx2.screen_mode(5)
 
+;        demo1()
+;        sys.wait(3*60)
+        demo2()
+
+        gfx2.screen_mode(0)
+        txt.print("done!\n")
+
+        test_stack.test()
+    }
+
+    sub demo1() {
         uword pixels = memory("pixels", 320)
         uword yy = 10
         uword xx
@@ -124,21 +135,12 @@ main {
             }
             xx+=4
         }
-
-        sys.wait(3*60)
-
-        demo2()
-
-        gfx2.screen_mode(255)
-        txt.print("done!\n")
-
-        test_stack.test()
     }
 
     sub demo2 () {
         gfx2.text_charset(3)
 
-        ubyte[] modes = [1, 0, 128]
+        ubyte[] modes = [4, 1, 5]
         ubyte mode
         for mode in modes {
             gfx2.screen_mode(mode)

examples/line-circle-txt.p8

@@ -1,6 +1,5 @@
 %import textio
 %import syslib
-%import test_stack
 %zeropage basicsafe
 
 ; Note: this program is compatible with C64 and CX16.
@@ -8,7 +7,7 @@
 main {
 
     sub start() {
-        txt.print("mid-point\ncircle\n and\nbresenham\nline\nalgorithms.\n")
+        txt.print("rectangles\nand circle\ndrawing.\n")
 
         ubyte r
         for r in 3 to 12 step 3 {
@@ -21,16 +20,6 @@ main {
         txt.clear_screen()
         disc(20, 12, 12)
 
-        txt.print("enter for lines:")
-        void c64.CHRIN()
-        c64.CHROUT('\n')
-        txt.clear_screen()
-
-        line(1, 10, 38, 24)
-        line(1, 20, 38, 2)
-        line(20, 4, 10, 24)
-        line(39, 16, 12, 0)
-
         txt.print("enter for rectangles:")
         void c64.CHRIN()
         c64.CHROUT('\n')
@@ -41,8 +30,6 @@ main {
         rect(10, 10, 10, 10, false)
         rect(6, 0, 16, 20, true)
 
-        test_stack.test()
-
 
         sub rect(ubyte x1, ubyte y1, ubyte x2, ubyte y2, ubyte fill) {
             ubyte x
@@ -67,46 +54,6 @@ main {
             }
         }
 
-        sub line(ubyte x1, ubyte y1, ubyte x2, ubyte y2) {
-            ; Bresenham algorithm, not very optimized to keep clear code.
-            ; For a better optimized version have a look in the graphics.p8 module.
-            byte d = 0
-            ubyte dx = abs(x2 - x1)
-            ubyte dy = abs(y2 - y1)
-            ubyte dx2 = 2 * dx
-            ubyte dy2 = 2 * dy
-            ubyte ix = sgn(x2 as byte - x1 as byte) as ubyte
-            ubyte iy = sgn(y2 as byte - y1 as byte) as ubyte
-            ubyte x = x1
-            ubyte y = y1
-
-            if dx >= dy {
-                repeat {
-                    txt.setcc(x, y, 42, 5)
-                    if x==x2
-                        return
-                    x += ix
-                    d += dy2
-                    if d > dx {
-                        y += iy
-                        d -= dx2
-                    }
-                }
-            } else {
-                repeat {
-                    txt.setcc(x, y, 42, 5)
-                    if y == y2
-                        return
-                    y += iy
-                    d += dx2
-                    if d > dy {
-                        x += ix
-                        d -= dy2
-                    }
-                }
-            }
-        }
-
         sub circle(ubyte xcenter, ubyte ycenter, ubyte radius) {
             ; Midpoint algorithm
             ubyte x = radius

examples/tehtriz.p8

@@ -214,11 +214,7 @@ waitkey:
                 sound.lineclear_big()
             else
                 sound.lineclear()
-            c64.TIME_LO=0
+            sys.wait(20)    ; slight delay to flash the line
-            while c64.TIME_LO<20 {
-                ; slight delay to flash the line
-            }
-            c64.TIME_LO=0
             for linepos in complete_lines
                 if linepos and blocklogic.isLineFull(linepos)
                     blocklogic.collapse(linepos)
@@ -288,12 +284,10 @@ waitkey:
     }
 
     sub drawBoard() {
-        c64.CLEARSCR()
+        txt.clear_screen()
         txt.color(7)
         txt.plot(1,1)
-        txt.print("irmen's")
+        txt.print("* tehtriz *")
-        txt.plot(2,2)
-        txt.print("teh▁triz")
         txt.color(5)
         txt.plot(6,4)
         txt.print("hold:")

examples/test.p8

@@ -3,8 +3,24 @@
 
 main {
 
-
     sub start() {
-        txt.print("hello\n")
+
+        uword ptr = $4000
+        uword ww
+
+        pokew($4000, $98cf)
+        ww = peekw($4000)
+        txt.print_uwhex(ww,1)
+        txt.nl()
+
+        pokew(ptr, $98cf)
+        ww = peekw(ptr)
+        txt.print_uwhex(ww,1)
+        txt.nl()
+
+        pokew(ptr+2, $1234)
+        ww = peekw(ptr+2)
+        txt.print_uwhex(ww,1)
+        txt.nl()
     }
 }

examples/textelite.p8

@@ -20,12 +20,12 @@ main {
 
     sub start() {
         txt.lowercase()
-        txt.print("\u000c\n --- TextElite v1.1 ---\n")
+        txt.print("\u000c\n --- TextElite v1.2 ---\n")
 
         galaxy.travel_to(1, numforLave)
         market.init(0)  ;  Lave's market is seeded with 0
         ship.init()
-        planet.display(false)
+        planet.display(false, 0)
 
         repeat {
             ; test_stack.test()
@@ -40,9 +40,9 @@ main {
                 when input[0] {
                     '?' -> {
                         txt.print("\nCommands are:\n"+
-                            "buy   jump      info    cash   >=save\n"+
+                            "buy   jump      info    map    >=save\n"+
-                            "sell  teleport  market  hold   <=load\n"+
+                            "sell  teleport  market  cash   <=load\n"+
-                            "fuel  galhyp    local          quit\n")
+                            "fuel  galhyp    local   hold   quit\n")
                     }
                     'q' -> break
                     'b' -> trader.do_buy()
@@ -52,7 +52,12 @@ main {
                     't' -> trader.do_teleport()
                     'g' -> trader.do_next_galaxy()
                     'i' -> trader.do_info()
-                    'm' -> trader.do_show_market()
+                    'm' -> {
+                        if input[1]=='a' and input[2]=='p'
+                            trader.do_map()
+                        else
+                            trader.do_show_market()
+                    }
                     'l' -> trader.do_local()
                     'c' -> trader.do_cash()
                     'h' -> trader.do_hold()
@@ -112,7 +117,7 @@ trader {
         sys.memcopy(&savedata.cargo0, ship.cargohold, len(ship.cargohold))
         galaxy.travel_to(savedata.galaxy, savedata.planet)
 
-        planet.display(false)
+        planet.display(false, 0)
     }
 
     sub do_save() {
@@ -158,10 +163,10 @@ trader {
                 galaxy.init_market_for_planet()
                 ship.fuel -= distance
                 txt.print("\n\nHyperspace jump! Arrived at:\n")
-                planet.display(true)
+                planet.display(true,0 )
                 return
             }
-            txt.print("Insufficient fuel\n")
+            txt.print("\nInsufficient fuel\n")
         } else {
             txt.print(" Not found!\n")
         }
@@ -249,8 +254,9 @@ trader {
     }
 
     sub do_next_galaxy() {
+        txt.print("\n>>>>>>>> Galaxy Hyperjump!\n")
         galaxy.travel_to(galaxy.number+1, planet.number)
-        planet.display(false)
+        planet.display(false, 0)
     }
 
     sub do_info() {
@@ -258,14 +264,17 @@ trader {
         num_chars = txt.input_chars(input)
         if num_chars {
             ubyte current_planet = planet.number
+            ubyte x = planet.x
+            ubyte y = planet.y
             if galaxy.search_closest_planet(input) {
-                planet.display(false)
+                ubyte distance = planet.distance(x, y)
+                planet.display(false, distance)
             } else {
                 txt.print(" Not found!")
             }
             galaxy.travel_to(galaxy.number, current_planet)
         } else {
-            planet.display(false)
+            planet.display(false, 0)
         }
     }
 
@@ -273,6 +282,14 @@ trader {
         galaxy.local_area()
     }
 
+    sub do_map() {
+        txt.print("\n(l)ocal or (g)alaxy starmap? ")
+        num_chars = txt.input_chars(input)
+        if num_chars {
+            galaxy.starmap(input[0]=='l')
+        }
+    }
+
     sub do_show_market() {
         market.display()
         txt.print("\nFuel: ")
@@ -358,14 +375,15 @@ market {
             util.print_right(13, names[ci])
             txt.print("   ")
             util.print_10s(current_price[ci])
-            txt.print("  ")
+            txt.column(24)
             txt.print_ub(current_quantity[ci])
+            txt.chrout(' ')
             when units[ci] {
                 0 -> txt.chrout('t')
                 1 -> txt.print("kg")
                 2 -> txt.chrout('g')
             }
-            txt.print("   ")
+            txt.column(32)
             txt.print_ub(ship.cargohold[ci])
             txt.nl()
         }
@@ -474,10 +492,7 @@ galaxy {
                     txt.chrout('-')
                 txt.spc()
                 planet.name = make_current_planet_name()
-                planet.display(true)
+                planet.display(true, distance)
-                txt.print(" (")
-                util.print_10s(distance)
-                txt.print(" LY)\n")
             }
             pn++
         } until pn==0
@@ -485,6 +500,72 @@ galaxy {
         travel_to(number, current_planet)
     }
 
+    sub starmap(ubyte local) {
+        ubyte current_planet = planet.number
+        ubyte px = planet.x
+        ubyte py = planet.y
+        uword current_name = planet.name
+        ubyte pn = 0
+        uword scaling = 8
+        if local
+            scaling = 2
+        if txt.width() > 60
+            scaling /= 2
+
+        init(number)
+        txt.clear_screen()
+        txt.print("Galaxy #")
+        txt.print_ub(number)
+        if local
+            txt.print(" - local systems")
+        else
+            txt.print(" - galaxy")
+        txt.print(" starmap:\n")
+        ubyte max_distance = 255
+        if local
+            max_distance = ship.Max_fuel
+        do {
+            generate_next_planet()
+            ubyte distance = planet.distance(px, py)
+            if distance <= max_distance {
+                planet.name = make_current_planet_name()
+                planet.name[0] |= 32       ; uppercase first letter
+                uword tx = planet.x
+                uword ty = planet.y
+                if local {
+                    tx = tx + 24 - px
+                    ty = ty + 24 - py
+                }
+                tx /= scaling
+                ty /= scaling*2
+                ubyte sx = lsb(tx)
+                ubyte sy = lsb(ty)
+                ubyte char = '*'
+                if planet.number==current_planet
+                    char = '%'
+                if local or planet.number==current_planet {
+                    txt.plot(2+sx-2, 2+sy+1)
+                    txt.print(current_name)
+                    if distance {
+                        txt.plot(2+sx-2, 2+sy+2)
+                        util.print_10s(distance)
+                        txt.print(" LY")
+                    }
+                }
+                txt.setchr(2+sx, 2+sy, char)
+            }
+            pn++
+        } until pn==0
+
+        if txt.width() < 80
+            txt.plot(0,20)
+        else
+            txt.plot(0,36)
+
+
+        travel_to(number, current_planet)
+    }
+
     ubyte pn_pair1
     ubyte pn_pair2
     ubyte pn_pair3
@@ -838,15 +919,21 @@ planet {
         }
     }
 
-    sub display(ubyte compressed) {
+    sub display(ubyte compressed, ubyte distance) {
         if compressed {
             print_name_uppercase()
-            txt.print(" TL:")
+            if distance {
+                txt.print(" (")
+                util.print_10s(distance)
+                txt.print(" LY)")
+            }
+            txt.print("  Tech level:")
             txt.print_ub(techlevel+1)
-            txt.spc()
+            txt.print("\n    ")
             txt.print(econnames[economy])
             txt.spc()
             txt.print(govnames[govtype])
+            txt.nl()
         } else {
             txt.print("\n\nSystem: ")
             print_name_uppercase()
@@ -857,6 +944,11 @@ planet {
             txt.spc()
             txt.chrout('#')
             txt.print_ub(number)
+            if distance {
+                txt.print("\nDistance: ")
+                util.print_10s(distance)
+                txt.print(" LY")
+            }
             txt.print("\nEconomy: ")
             txt.print(econnames[economy])
             txt.print("\nGovernment: ")

httpCompilerService/build.gradle

@@ -2,7 +2,7 @@
 plugins {
     id 'java'
     id 'application'
-    id "org.jetbrains.kotlin.jvm" version "1.4.21"
+    id "org.jetbrains.kotlin.jvm" version "1.4.30"
     id 'com.github.johnrengelman.shadow' version '6.1.0'
 }
 

scripts/clean.sh

@@ -2,4 +2,5 @@
 
 rm -f *.jar *.asm *.prg *.vm.txt *.vice-mon-list a.out
 rm -rf build out
+rm -rf compiler/build compilerAst/build dbusCompilerService/build httpCompilerService/build parser/build
 

settings.gradle

@@ -1,4 +1,5 @@
 include ':parser'
+include ':compilerAst'
 include ':compiler'
 include ':dbusCompilerService'
 include ':httpCompilerService'

syntax-files/IDEA/Prog8.xml

@@ -11,10 +11,10 @@
       <option name="HAS_PARENS" value="true" />
       <option name="HAS_STRING_ESCAPES" value="true" />
     </options>
-    <keywords keywords="&amp;;-&gt;;@;\$;and;as;asmsub;break;clobbers;continue;do;downto;else;false;for;goto;if;if_cc;if_cs;if_eq;if_mi;if_ne;if_neg;if_nz;if_pl;if_pos;if_vc;if_vs;if_z;in;inline;not;or;repeat;return;romsub;step;sub;to;true;until;when;while;xor;~" ignore_case="false" />
+    <keywords keywords="&amp;;-&gt;;@;\$;and;as;asmsub;break;clobbers;do;downto;else;false;for;goto;if;if_cc;if_cs;if_eq;if_mi;if_ne;if_neg;if_nz;if_pl;if_pos;if_vc;if_vs;if_z;in;inline;not;or;repeat;return;romsub;step;sub;to;true;until;when;while;xor;~" ignore_case="false" />
     <keywords2 keywords="%address;%asm;%asmbinary;%asminclude;%breakpoint;%import;%launcher;%option;%output;%target;%zeropage;%zpreserved" />
     <keywords3 keywords="byte;const;float;str;struct;ubyte;uword;void;word;zp" />
-    <keywords4 keywords="abs;acos;all;any;asin;atan;avg;ceil;cos;cos16;cos16u;cos8;cos8u;deg;floor;len;ln;log2;lsb;lsl;lsr;max;memory;min;mkword;msb;offsetof;rad;reverse;rnd;rndf;rndw;rol;rol2;ror;ror2;round;sgn;sin;sin16;sin16u;sin8;sin8u;sizeof;sort;sqrt;sqrt16;sum;swap;tan" />
+    <keywords4 keywords="abs;acos;all;any;asin;atan;avg;ceil;cos;cos16;cos16u;cos8;cos8u;deg;floor;len;ln;log2;lsb;lsl;lsr;max;memory;min;mkword;msb;offsetof;peek;peekw;poke;pokew;rad;reverse;rnd;rndf;rndw;rol;rol2;ror;ror2;round;sgn;sin;sin16;sin16u;sin8;sin8u;sizeof;sort;sqrt;sqrt16;sum;swap;tan" />
   </highlighting>
   <extensionMap>
     <mapping ext="p8" />