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fix wordvar -= @(memory)

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Irmen de Jong 2023-09-03 01:12:26 +02:00
parent 95be1c9e22
commit e1b3582f08
2 changed files with 17 additions and 17 deletions
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6
codeGenCpu6502/src/prog8/codegen/cpu6502/assignment/AugmentableAssignmentAsmGen.kt
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@ -892,7 +892,7 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
// now implement the non-assiciative operators... // now implement the non-assiciative operators...
when (operator) { when (operator) {
"-" -> { "-" -> {
// TODO optimize: don't use scratch var // A = variable - A
val tmpVar = if(variable!="P8ZP_SCRATCH_B1") "P8ZP_SCRATCH_B1" else "P8ZP_SCRATCH_REG" val tmpVar = if(variable!="P8ZP_SCRATCH_B1") "P8ZP_SCRATCH_B1" else "P8ZP_SCRATCH_REG"
asmgen.out(" sta $tmpVar | lda $variable | sec | sbc $tmpVar") asmgen.out(" sta $tmpVar | lda $variable | sec | sbc $tmpVar")
} }
@ -1240,8 +1240,8 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
+""") +""")
} }
"-" -> { "-" -> {
// name -= @(memory)
asmgen.translateDirectMemReadExpressionToRegA(memread) asmgen.translateDirectMemReadExpressionToRegA(memread)
// TODO optimize: don't use scratch var if possible
val tmpByte = if(name!="P8ZP_SCRATCH_B1") "P8ZP_SCRATCH_B1" else "P8ZP_SCRATCH_REG" val tmpByte = if(name!="P8ZP_SCRATCH_B1") "P8ZP_SCRATCH_B1" else "P8ZP_SCRATCH_REG"
asmgen.out(""" asmgen.out("""
sta $tmpByte sta $tmpByte
@ -1249,7 +1249,7 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
sec sec
sbc $tmpByte sbc $tmpByte
sta $name sta $name
bcc + bcs +
dec $name+1 dec $name+1
+""") +""")
} }

28
examples/test.p8
View File

@ -3,25 +3,25 @@
main { main {
sub start() { sub start() {
byte index = 100
byte[] t_index = [-1,-2,-3,-4,-5]
index = 4 uword ww= 300
index = index>t_index[4] @($4000) = 100
txt.print_b(index) ww -= @($4000)
txt.nl() ww -= 100
index = index>t_index[4] txt.print_uw(ww) ; 100
txt.print_b(index)
txt.nl()
; index = index < t_index[4] ; ubyte index = 100
; index = index < t_index[nibble] ; ubyte[] t_index = [1,2,3,4,5]
; txt.print_ub(index) ; ubyte nibble = 0
;
; index = index + t_index[4]
; index = index + t_index[nibble]
; txt.print_ub(index) ; 106
; txt.nl() ; txt.nl()
; ;
; nibble++ ; nibble++
; index = index > t_index[3] ; index = index - t_index[3]
; index = index > t_index[nibble] ; index = index - t_index[nibble]
; txt.print_ub(index) ; 100 ; txt.print_ub(index) ; 100
; txt.nl() ; txt.nl()
} }