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fix in-place <= for bytes

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This commit is contained in:
Irmen de Jong 2023-09-02 23:58:16 +02:00
parent 15c649024e
commit 1ce8fe06d5
1 changed files with 12 additions and 6 deletions
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18
codeGenCpu6502/src/prog8/codegen/cpu6502/assignment/AugmentableAssignmentAsmGen.kt
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@ -813,10 +813,13 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
"<=" -> {
if(!signed) {
asmgen.out("""
tay
cmp $variable
bcc +
beq +
lda #0
ldy $variable
rol a""")
beq ++
+ lda #1
+""")
} else {
// see http://www.6502.org/tutorials/compare_beyond.html
asmgen.out("""
@ -966,10 +969,13 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
if(!signed) {
TODO("swap operand order")
asmgen.out("""
tay
cmp $variable
bcc +
beq +
lda #0
ldy $variable
rol a""")
beq ++
+ lda #1
+""")
} else {
TODO("swap operand order")
// see http://www.6502.org/tutorials/compare_beyond.html