++/-- and @Pc without translateExpression()

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

@@ -210,17 +210,13 @@ internal class FunctionCallAsmGen(private val program: Program, private val asmg
 """)
                         }
                         else -> {
-                            asmgen.translateExpression(value)   // todo directly into A
+                            asmgen.assignExpressionToRegister(value, RegisterOrPair.A)
                             asmgen.out("""
-            inx
-            pha
-            lda  P8ESTACK_LO,x
-            beq  +
-            sec  
-            bcs  ++
-+           clc
-+           pla
-""")
+                                beq  +
+                                sec
+                                bcs  ++
++                               clc
++""")
                         }
                     }
                 }

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

@@ -54,14 +54,8 @@ internal class PostIncrDecrAsmGen(private val program: Program, private val asmg
                             asmgen.out("+\tdec  ${'$'}ffff\t; modified")
                     }
                     else -> {
-                        asmgen.translateExpression(addressExpr)    // todo directly into AY?
-                        asmgen.out("""
-                            inx
-                            lda  P8ESTACK_LO,x
-                            sta  (+) + 1
-                            lda  P8ESTACK_HI,x
-                            sta  (+) + 2
-                        """)
+                        asmgen.assignExpressionToRegister(addressExpr, RegisterOrPair.AY)
+                        asmgen.out("  sta  (+) + 1 |  sty  (+) + 2")
                         if(incr)
                             asmgen.out("+\tinc  ${'$'}ffff\t; modified")
                         else

docs/source/todo.rst

@@ -2,6 +2,7 @@
 TODO
 ====
 
+- reduce the amount of translateExpression() calls when the result can be directly assigned to register or variable
 - make it possible to use cpu opcodes such as 'nop' as variable names by prefixing all asm vars with something such as '_'
 - option to load the built-in library files from a directory instead of the embedded ones (for easier library development/debugging)
 - see if we can group some errors together for instance the (now single) errors about unidentified symbols

examples/test.p8

@@ -6,27 +6,30 @@ main {
 
     sub start() {
 
-        float f = 1.1
-        float[] farr = [2.2, 3.3]
+        ubyte ff = 10
 
-        floats.print_f(f)
-        txt.chrout('\n')
-        floats.print_f(farr[0])
-        txt.chrout(',')
-        floats.print_f(farr[1])
-        txt.chrout('\n')
-
-        swap(f, farr[1])
-        floats.print_f(f)
-        txt.chrout('\n')
-        floats.print_f(farr[0])
-        txt.chrout(',')
-        floats.print_f(farr[1])
-        txt.chrout('\n')
+        setflag(ff-10)
+        setflag(ff-9)
+        setflag(ff-10)
+        setflag(ff-9)
 
         testX()
     }
 
+    asmsub setflag(ubyte bitje @ Pc) {
+        %asm {{
+            bcs  +
+            lda  #'0'
+            jsr  c64.CHROUT
+            lda  #13
+            jmp  c64.CHROUT
++           lda  #'1'
+            jsr  c64.CHROUT
+            lda  #13
+            jmp  c64.CHROUT
+        }}
+    }
+
     asmsub testX() {
         %asm {{
             stx  _saveX