mirror of
https://github.com/irmen/prog8.git
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928611eb20
For function calls, register saves go via stack (to allow nested saves) for simpler cases, registers are saved in a local variable. Fixed too agressive removal of sta-lda sequence if the lda is followed by a branching instruction. Insert missing cmp #0 after functioncall if the value of the A register is needed in a comparison expression (could otherwise test wrong status flag)
95 lines
2.2 KiB
Lua
95 lines
2.2 KiB
Lua
%import textio
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%import diskio
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;%import floats
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;%import graphics
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%zeropage basicsafe
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%import test_stack
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%option no_sysinit
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main {
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;romsub $ff14 = FB_set_8_pixels_opaque(ubyte pattern @R0, ubyte mask @A, ubyte color1 @X, ubyte color2 @Y) clobbers(A,X,Y)
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;romsub $ff14 = FB_set_8_pixels_opaque_OLD(ubyte mask @A, ubyte color1 @X, ubyte color2 @Y) clobbers(A,X,Y)
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asmsub set_8_pixels_opaque(ubyte pattern @R0, ubyte mask @A, ubyte color1 @X, ubyte color2 @Y) clobbers(A,X,Y) {
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%asm {{
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sta _a
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stx _x
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sty _y
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lda _a
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jsr txt.print_ub
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lda #13
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jsr c64.CHROUT
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lda _x
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jsr txt.print_ub
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lda #13
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jsr c64.CHROUT
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lda _y
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jsr txt.print_ub
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lda #13
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jsr c64.CHROUT
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lda cx16.r0
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ldy cx16.r0+1
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jsr txt.print_uw
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lda #13
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jsr c64.CHROUT
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rts
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_a .byte 0
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_x .byte 0
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_y .byte 0
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}}
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}
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asmsub set_8_pixels_opaque_OLD(ubyte mask @A, ubyte color1 @X, ubyte color2 @Y) clobbers(A,X,Y) {
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%asm {{
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sta _a
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stx _x
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sty _y
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lda _a
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jsr txt.print_ub
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lda #13
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jsr c64.CHROUT
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lda _x
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jsr txt.print_ub
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lda #13
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jsr c64.CHROUT
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lda _y
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jsr txt.print_ub
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lda #13
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jsr c64.CHROUT
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rts
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_a .byte 0
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_x .byte 0
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_y .byte 0
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}}
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}
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sub start () {
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while c64.CHRIN() {
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; read the rest of the entry until the end
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}
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; cx16.r0 = 65535
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; set_8_pixels_opaque_OLD(111,222,33)
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; txt.chrout('\n')
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; ;ubyte qq=c64.CHKIN(3) ;; TODO fix compiler crash "can't translate zero return values in assignment"
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;
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; test_stack.test()
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; ubyte bb = 44
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; set_8_pixels_opaque(bb,111,222,33)
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; txt.chrout('\n')
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; test_stack.test()
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;
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; set_8_pixels_opaque(c64.CHRIN(),111,222,33)
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; txt.chrout('\n')
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test_stack.test()
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}
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}
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