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improve (u)byte '>=' codegen

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This commit is contained in:
Irmen de Jong 2021-03-15 23:20:16 +01:00
parent a00c693f93
commit 5e0aef04fe
1 changed files with 29 additions and 26 deletions
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55
compiler/src/prog8/compiler/target/cpu6502/codegen/ExpressionsAsmGen.kt
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@ -824,6 +824,11 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
}
private fun translateUbyteGreaterOrEqualJump(left: Expression, right: Expression, leftConstVal: NumericLiteralValue?, rightConstVal: NumericLiteralValue?, jumpIfFalseLabel: String) {
fun code(cmpOperand: String) {
asmgen.out(" cmp $cmpOperand | bcc $jumpIfFalseLabel")
}
if(rightConstVal!=null) {
if(leftConstVal!=null) {
if(rightConstVal<leftConstVal)
@ -833,27 +838,38 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
if (left is IdentifierReference) {
if(rightConstVal.number.toInt()!=0) {
asmgen.assignExpressionToRegister(left, RegisterOrPair.A)
asmgen.out(" cmp #${rightConstVal.number} | bcc $jumpIfFalseLabel")
code("#${rightConstVal.number}")
}
return
}
else if (left is DirectMemoryRead) {
if(rightConstVal.number.toInt()!=0) {
translateDirectMemReadExpression(left, false)
asmgen.out(" cmp #${rightConstVal.number} | bcc $jumpIfFalseLabel")
code("#${rightConstVal.number}")
}
return
}
}
}
// TODO optimize if right is variable or mem-read to avoid use of ZP location
if(byteJumpForSimpleRightOperands(left, right, ::code))
return
asmgen.assignExpressionToVariable(right, "P8ZP_SCRATCH_B1", DataType.UBYTE, null)
asmgen.assignExpressionToRegister(left, RegisterOrPair.A)
asmgen.out(" cmp P8ZP_SCRATCH_B1 | bcc $jumpIfFalseLabel")
return code("P8ZP_SCRATCH_B1")
}
private fun translateByteGreaterOrEqualJump(left: Expression, right: Expression, leftConstVal: NumericLiteralValue?, rightConstVal: NumericLiteralValue?, jumpIfFalseLabel: String) {
fun code(sbcOperand: String) {
asmgen.out("""
sec
sbc $sbcOperand
bvc +
eor #$80
+ bmi $jumpIfFalseLabel""")
}
if(rightConstVal!=null) {
if(leftConstVal!=null) {
if(rightConstVal<leftConstVal)
@ -861,34 +877,21 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
return
} else {
if (left is IdentifierReference) {
val name = asmgen.asmVariableName(left)
if(rightConstVal.number.toInt()!=0) {
asmgen.out("""
lda $name
sec
sbc #${rightConstVal.number}
bvc +
eor #$80
+ bmi $jumpIfFalseLabel""")
return
}
else {
asmgen.out(" lda $name | bmi $jumpIfFalseLabel")
return
}
asmgen.assignExpressionToRegister(left, RegisterOrPair.A)
return if(rightConstVal.number.toInt()!=0)
code("#${rightConstVal.number}")
else
asmgen.out(" bmi $jumpIfFalseLabel")
}
}
}
// TODO optimize if right is variable or mem-read to avoid use of ZP location
if(byteJumpForSimpleRightOperands(left, right, ::code))
return
asmgen.assignExpressionToVariable(right, "P8ZP_SCRATCH_B1", DataType.UBYTE, null)
asmgen.assignExpressionToRegister(left, RegisterOrPair.A)
asmgen.out("""
sec
sbc P8ZP_SCRATCH_B1
bvc +
eor #$80
+ bmi $jumpIfFalseLabel""")
return code("P8ZP_SCRATCH_B1")
}
private fun translateUwordGreaterOrEqualJump(left: Expression, right: Expression, leftConstVal: NumericLiteralValue?, rightConstVal: NumericLiteralValue?, jumpIfFalseLabel: String) {