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optimize pokew()

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This commit is contained in:
Irmen de Jong 2021-02-14 00:05:57 +01:00
parent 78af2cd4dc
commit 5e6e711f33
1 changed files with 49 additions and 0 deletions
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49
compiler/src/prog8/compiler/target/c64/codegen/BuiltinFunctionsAsmGen.kt
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@ -964,6 +964,55 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
}
private fun funcPokeW(fcall: IFunctionCall) {
when(val addrExpr = fcall.args[0]) {
is NumericLiteralValue -> {
asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.AY)
val addr = addrExpr.number.toHex()
asmgen.out(" sta $addr | sty ${addr}+1")
return
}
is IdentifierReference -> {
val varname = asmgen.asmVariableName(addrExpr)
if(asmgen.isZpVar(addrExpr)) {
// pointervar is already in the zero page, no need to copy
asmgen.saveRegisterLocal(CpuRegister.X, (fcall as Node).definingSubroutine()!!)
asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.AX)
if (asmgen.compTarget.machine.cpu == CpuType.CPU65c02) {
asmgen.out("""
sta ($varname)
txa
ldy #1
sta ($varname),y""")
} else {
asmgen.out("""
ldy #0
sta ($varname),y
txa
iny
sta ($varname),y""")
}
asmgen.restoreRegisterLocal(CpuRegister.X)
return
}
}
is BinaryExpression -> {
if(addrExpr.operator=="+" && addrExpr.left is IdentifierReference && addrExpr.right is NumericLiteralValue) {
asmgen.saveRegisterLocal(CpuRegister.X, (fcall as Node).definingSubroutine()!!)
asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.AX)
val varname = asmgen.asmVariableName(addrExpr.left as IdentifierReference)
val index = (addrExpr.right as NumericLiteralValue).number.toHex()
asmgen.out("""
ldy #$index
sta ($varname),y
txa
iny
sta ($varname),y""")
asmgen.restoreRegisterLocal(CpuRegister.X)
return
}
}
}
asmgen.assignExpressionToVariable(fcall.args[0], "P8ZP_SCRATCH_W1", DataType.UWORD, null)
asmgen.assignExpressionToRegister(fcall.args[1], RegisterOrPair.AY)
asmgen.out(" jsr prog8_lib.func_pokew")