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optimized float ==0 or 1 comparisons

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This commit is contained in:
Irmen de Jong 2020-09-27 01:56:08 +02:00
parent 84c0685a60
commit 961380acb6
1 changed files with 93 additions and 12 deletions
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105
compiler/src/prog8/compiler/target/c64/codegen/ExpressionsAsmGen.kt
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@ -56,12 +56,7 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
when (dt) {
in ByteDatatypes -> translateByteEquals(left, right, leftConstVal, rightConstVal, jumpIfFalseLabel)
in WordDatatypes -> translateWordEquals(left, right, leftConstVal, rightConstVal, jumpIfFalseLabel)
DataType.FLOAT -> {
// TODO optimize the easiest compares such as == 0, == 1
translateExpression(left)
translateExpression(right)
asmgen.out(" jsr floats.equal_f | inx | lda P8ESTACK_LO,x | beq $jumpIfFalseLabel")
}
DataType.FLOAT -> translateFloatEquals(left, right, leftConstVal, rightConstVal, jumpIfFalseLabel)
else -> throw AssemblyError("weird operand datatype")
}
}
@ -69,12 +64,7 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
when (dt) {
in ByteDatatypes -> translateByteNotEquals(left, right, leftConstVal, rightConstVal, jumpIfFalseLabel)
in WordDatatypes -> translateWordNotEquals(left, right, leftConstVal, rightConstVal, jumpIfFalseLabel)
DataType.FLOAT -> {
// TODO optimize the easiest compares such as != 0, != 1
translateExpression(left)
translateExpression(right)
asmgen.out(" jsr floats.notequal_f | inx | lda P8ESTACK_LO,x | beq $jumpIfFalseLabel")
}
DataType.FLOAT -> translateFloatNotEquals(left, right, leftConstVal, rightConstVal, jumpIfFalseLabel)
else -> throw AssemblyError("weird operand datatype")
}
}
@ -795,6 +785,97 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
asmgen.out(" jsr prog8_lib.notequal_w | inx | lda P8ESTACK_LO,x | beq $jumpIfFalseLabel")
}
private fun translateFloatEquals(left: Expression, right: Expression, leftConstVal: NumericLiteralValue?, rightConstVal: NumericLiteralValue?, jumpIfFalseLabel: String) {
if(rightConstVal!=null) {
if(leftConstVal!=null) {
if(rightConstVal!=leftConstVal)
asmgen.out(" jmp $jumpIfFalseLabel")
return
} else {
if (left is IdentifierReference) {
val name = asmgen.asmVariableName(left)
when(rightConstVal.number.toDouble())
{
0.0 -> {
asmgen.out("""
lda $name
clc
adc $name+1
adc $name+2
adc $name+3
adc $name+4
bne $jumpIfFalseLabel""")
return
}
1.0 -> {
asmgen.out("""
lda $name
cmp #129
bne $jumpIfFalseLabel
lda $name+1
clc
adc $name+2
adc $name+3
adc $name+4
bne $jumpIfFalseLabel""")
return
}
}
}
}
}
translateExpression(left)
translateExpression(right)
asmgen.out(" jsr floats.equal_f | inx | lda P8ESTACK_LO,x | beq $jumpIfFalseLabel")
}
private fun translateFloatNotEquals(left: Expression, right: Expression, leftConstVal: NumericLiteralValue?, rightConstVal: NumericLiteralValue?, jumpIfFalseLabel: String) {
if(rightConstVal!=null) {
if(leftConstVal!=null) {
if(rightConstVal==leftConstVal)
asmgen.out(" jmp $jumpIfFalseLabel")
return
} else {
if (left is IdentifierReference) {
val name = asmgen.asmVariableName(left)
when(rightConstVal.number.toDouble())
{
0.0 -> {
asmgen.out("""
lda $name
clc
adc $name+1
adc $name+2
adc $name+3
adc $name+4
beq $jumpIfFalseLabel""")
return
}
1.0 -> {
asmgen.out("""
lda $name
cmp #129
bne +
lda $name+1
clc
adc $name+2
adc $name+3
adc $name+4
beq $jumpIfFalseLabel
+""")
return
}
}
}
}
}
translateExpression(left)
translateExpression(right)
asmgen.out(" jsr floats.notequal_f | inx | lda P8ESTACK_LO,x | beq $jumpIfFalseLabel")
}
private fun translateExpression(expression: FunctionCall) {
val functionName = expression.target.nameInSource.last()
val builtinFunc = BuiltinFunctions[functionName]