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byte/word typecasts optimized even further to just use cpu registers (and fixed sign extending AY)
This commit is contained in:
Irmen de Jong
parent
53a600d87b
commit
238d8197f5
@ -1081,7 +1081,6 @@ sign_extend_stack_byte .proc
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sign_extend_AY_byte .proc
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; -- sign extend the (signed) byte in AY to full 16 bits
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pha
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tya
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and #$80
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beq +
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ldy #$ff
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@ -122,7 +122,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
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assignMemoryByte(assign.target, null, value.addressExpression as IdentifierReference)
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}
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else -> {
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asmgen.assignExpressionToVariable(value.addressExpression, asmgen.asmVariableName("P8ZP_SCRATCH_W2"), DataType.UWORD, assign.target.scope)
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assignExpressionToVariable(value.addressExpression, asmgen.asmVariableName("P8ZP_SCRATCH_W2"), DataType.UWORD, assign.target.scope)
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asmgen.out(" ldy #0 | lda (P8ZP_SCRATCH_W2),y")
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assignRegisterByte(assign.target, CpuRegister.A)
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}
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@ -272,18 +272,26 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
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return assignTypeCastedIdentifier(target.asmVarname, targetDt, asmgen.asmVariableName(value), valueDt)
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when (valueDt) {
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in ByteDatatypes, in WordDatatypes -> {
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// TODO optimize byte/word typecasts even more by only using registers
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asmgen.assignExpressionToVariable(value, "P8ZP_SCRATCH_W1", valueDt, null)
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return assignTypeCastedIdentifier(target.asmVarname, targetDt, "P8ZP_SCRATCH_W1", valueDt)
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in ByteDatatypes -> {
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assignExpressionToRegister(value, RegisterOrPair.A)
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return assignTypeCastedRegisters(target.asmVarname, targetDt, RegisterOrPair.A, valueDt)
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}
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in WordDatatypes -> {
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assignExpressionToRegister(value, RegisterOrPair.AY)
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return assignTypeCastedRegisters(target.asmVarname, targetDt, RegisterOrPair.AY, valueDt)
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}
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DataType.FLOAT -> {
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// float value cast, fall through and do it via stack for now
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// TODO optimize float casts to not use stack
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// because doing it with an intermediate variable uses up quite a few extra instructions at this point..
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// TODO re-enable float cast via var once expression code generation is more efficent? Or do it via FAC1 directly?
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// val scope = value.definingSubroutine()!!
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// scope.asmGenInfo.usedFloatEvalResultVar = true
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// assignExpressionToVariable(value, subroutineFloatEvalResultVar, valueDt, scope)
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// return assignTypeCastedIdentifier(target.asmVarname, targetDt, subroutineFloatEvalResultVar, valueDt)
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}
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in PassByReferenceDatatypes -> {
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// str/array value cast (most likely to UWORD, take address-of)
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return asmgen.assignExpressionToVariable(value, target.asmVarname, targetDt, null) // TODO test this cast
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return assignExpressionToVariable(value, target.asmVarname, targetDt, null) // TODO test this cast
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}
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else -> throw AssemblyError("strange dt in typecast assign to var: $valueDt --> $targetDt")
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}
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@ -398,6 +406,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
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}
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}
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DataType.FLOAT -> {
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// TODO loading targetasmname in SCRATCH_W2 no longer needed???????
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asmgen.out("""
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lda #<$targetAsmVarName
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ldy #>$targetAsmVarName
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@ -423,6 +432,145 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
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}
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private fun assignTypeCastedRegisters(targetAsmVarName: String, targetDt: DataType,
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regs: RegisterOrPair, sourceDt: DataType) {
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if(sourceDt == targetDt)
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throw AssemblyError("typecast to identical value")
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// also see: ExpressionAsmGen, fun translateExpression(typecast: TypecastExpression)
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when(sourceDt) {
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DataType.UBYTE -> {
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when(targetDt) {
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DataType.UBYTE, DataType.BYTE -> {
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asmgen.out(" st${regs.toString().toLowerCase()} $targetAsmVarName")
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}
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DataType.UWORD, DataType.WORD -> {
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if(CompilationTarget.instance.machine.cpu==CpuType.CPU65c02)
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asmgen.out(" st${regs.toString().toLowerCase()} $targetAsmVarName | stz $targetAsmVarName+1")
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else
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asmgen.out(" st${regs.toString().toLowerCase()} $targetAsmVarName | lda #0 | sta $targetAsmVarName+1")
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}
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DataType.FLOAT -> {
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when(regs) {
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RegisterOrPair.A -> asmgen.out(" tay")
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RegisterOrPair.X -> asmgen.out(" txa | tay")
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RegisterOrPair.Y -> {}
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else -> throw AssemblyError("non-byte regs")
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}
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asmgen.out("""
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lda #<$targetAsmVarName
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sta P8ZP_SCRATCH_W2
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lda #>$targetAsmVarName
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sta P8ZP_SCRATCH_W2+1
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jsr floats.cast_from_ub""")
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}
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else -> throw AssemblyError("weird type")
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}
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}
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DataType.BYTE -> {
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when(targetDt) {
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DataType.UBYTE, DataType.BYTE -> {
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asmgen.out(" st${regs.toString().toLowerCase()} $targetAsmVarName")
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}
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DataType.UWORD -> {
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if(CompilationTarget.instance.machine.cpu==CpuType.CPU65c02)
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asmgen.out(" st${regs.toString().toLowerCase()} $targetAsmVarName | stz $targetAsmVarName+1")
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else
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asmgen.out(" st${regs.toString().toLowerCase()} $targetAsmVarName | lda #0 | sta $targetAsmVarName+1")
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}
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DataType.WORD -> {
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when(regs) {
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RegisterOrPair.A -> {}
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RegisterOrPair.X -> asmgen.out(" txa")
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RegisterOrPair.Y -> asmgen.out(" tya")
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else -> throw AssemblyError("non-byte regs")
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}
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asmgen.signExtendAYlsb(sourceDt)
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asmgen.out(" sta $targetAsmVarName | sty $targetAsmVarName+1")
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}
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DataType.FLOAT -> {
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when(regs) {
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RegisterOrPair.A -> {}
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RegisterOrPair.X -> asmgen.out(" txa")
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RegisterOrPair.Y -> asmgen.out(" tya")
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else -> throw AssemblyError("non-byte regs")
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}
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asmgen.out("""
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ldy #<$targetAsmVarName
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sty P8ZP_SCRATCH_W2
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ldy #>$targetAsmVarName
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sty P8ZP_SCRATCH_W2+1
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jsr floats.cast_from_b""")
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}
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else -> throw AssemblyError("weird type")
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}
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}
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DataType.UWORD -> {
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when(targetDt) {
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DataType.BYTE, DataType.UBYTE -> {
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asmgen.out(" st${regs.toString().toLowerCase().first()} $targetAsmVarName")
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}
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DataType.WORD, DataType.UWORD -> {
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when(regs) {
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RegisterOrPair.AX -> asmgen.out(" sta $targetAsmVarName | stx $targetAsmVarName+1")
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RegisterOrPair.AY -> asmgen.out(" sta $targetAsmVarName | sty $targetAsmVarName+1")
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RegisterOrPair.XY -> asmgen.out(" stx $targetAsmVarName | sty $targetAsmVarName+1")
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else -> throw AssemblyError("non-word regs")
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}
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}
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DataType.FLOAT -> {
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if(regs!=RegisterOrPair.AY)
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throw AssemblyError("only supports AY here")
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asmgen.out("""
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pha
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lda #<$targetAsmVarName
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sta P8ZP_SCRATCH_W2
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lda #>$targetAsmVarName
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sta P8ZP_SCRATCH_W2+1
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pla
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jsr floats.cast_from_uw""")
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}
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else -> throw AssemblyError("weird type")
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}
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}
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DataType.WORD -> {
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when(targetDt) {
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DataType.BYTE, DataType.UBYTE -> {
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asmgen.out(" st${regs.toString().toLowerCase().first()} $targetAsmVarName")
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}
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DataType.WORD, DataType.UWORD -> {
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when(regs) {
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RegisterOrPair.AX -> asmgen.out(" sta $targetAsmVarName | stx $targetAsmVarName+1")
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RegisterOrPair.AY -> asmgen.out(" sta $targetAsmVarName | sty $targetAsmVarName+1")
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RegisterOrPair.XY -> asmgen.out(" stx $targetAsmVarName | sty $targetAsmVarName+1")
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else -> throw AssemblyError("non-word regs")
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}
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}
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DataType.FLOAT -> {
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if(regs!=RegisterOrPair.AY)
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throw AssemblyError("only supports AY here")
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asmgen.out("""
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pha
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lda #<$targetAsmVarName
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sta P8ZP_SCRATCH_W2
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lda #>$targetAsmVarName
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sta P8ZP_SCRATCH_W2+1
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pla
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jsr floats.cast_from_w""")
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}
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else -> throw AssemblyError("weird type")
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}
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}
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DataType.STR -> {
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if (targetDt != DataType.UWORD && targetDt == DataType.STR)
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throw AssemblyError("cannot typecast a string into another incompatitble type")
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TODO("assign typecasted string into target var")
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}
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else -> throw AssemblyError("weird type")
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}
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}
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private fun assignStackValue(target: AsmAssignTarget) {
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when(target.kind) {
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TargetStorageKind.VARIABLE -> {
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@ -1469,7 +1617,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
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asmgen.storeByteIntoPointer(addressExpr, ldaInstructionArg)
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}
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else -> {
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asmgen.assignExpressionToVariable(addressExpr, asmgen.asmVariableName("P8ZP_SCRATCH_W2"), DataType.UWORD, null)
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assignExpressionToVariable(addressExpr, asmgen.asmVariableName("P8ZP_SCRATCH_W2"), DataType.UWORD, null)
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asmgen.out(" ldy #0 | lda $ldaInstructionArg | sta (P8ZP_SCRATCH_W2),y")
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}
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}
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@ -1494,7 +1642,7 @@ internal class AssignmentAsmGen(private val program: Program, private val asmgen
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}
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else -> {
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asmgen.saveRegister(register, false, memoryAddress.definingSubroutine()!!)
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asmgen.assignExpressionToVariable(addressExpr, asmgen.asmVariableName("P8ZP_SCRATCH_W2"), DataType.UWORD, null)
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assignExpressionToVariable(addressExpr, asmgen.asmVariableName("P8ZP_SCRATCH_W2"), DataType.UWORD, null)
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asmgen.restoreRegister(CpuRegister.A, false)
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asmgen.out(" ldy #0 | sta (P8ZP_SCRATCH_W2),y")
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}
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112
examples/test.p8
112
examples/test.p8
@ -7,105 +7,29 @@ main {
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sub start() {
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uword uw = $c000
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ubyte ub = 1
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ubyte ub2 = 1
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uword uv1 = 1
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uword uv2 = 1
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float fl
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word ww
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uword uw
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byte bb
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ubyte ub
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uw = 1000
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uw += ub+ub2
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fl = 9997.999
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ww = (fl+1.1) as word
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uw = (fl+1.1) as uword
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fl = 97.999
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bb = (fl+1.1) as byte
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ub = (fl+1.1) as ubyte
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txt.print_w(ww)
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txt.chrout('\n')
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txt.print_uw(uw)
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txt.chrout('\n')
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uw = 1000
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uw -= ub+ub2
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txt.print_uw(uw)
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txt.print_b(bb)
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txt.chrout('\n')
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txt.print_ub(ub)
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txt.chrout('\n')
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uw = 1000
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uw *= ub+ub2
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txt.print_uw(uw)
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txt.chrout('\n')
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uw = 1000
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uw /= ub+ub2
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txt.print_uw(uw)
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txt.chrout('\n')
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uw = 1000
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uw %= 5*ub+ub2+ub2
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txt.print_uw(uw)
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txt.chrout('\n')
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uw = 1000
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uw <<= ub+ub2
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txt.print_uw(uw)
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txt.chrout('\n')
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uw = 1000
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uw >>= ub+ub2
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txt.print_uw(uw)
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txt.chrout('\n')
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uw = $1111
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uw &= (ub+ub2) | 15
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txt.print_uwhex(uw, 1)
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txt.chrout('\n')
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uw = $1111
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uw |= (ub+ub2) | 15
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txt.print_uwhex(uw, 1)
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txt.chrout('\n')
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uw = $1111
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uw ^= (ub+ub2) | 15
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txt.print_uwhex(uw, 1)
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txt.chrout('\n')
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txt.chrout('\n')
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uw = 1000
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uw += uv1+uv2
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txt.print_uw(uw)
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txt.chrout('\n')
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uw = 1000
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uw -= uv1+uv2
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txt.print_uw(uw)
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txt.chrout('\n')
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uw = 1000
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uw *= uv1+uv2
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txt.print_uw(uw)
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txt.chrout('\n')
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uw = 1000
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uw /= uv1+uv2
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txt.print_uw(uw)
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txt.chrout('\n')
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uw = 1000
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uw %= 5*uv1+uv2+uv2
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txt.print_uw(uw)
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txt.chrout('\n')
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uw = $1111
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uw &= (uv1+uv2) | 1023
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txt.print_uwhex(uw, 1)
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txt.chrout('\n')
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uw = $1111
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uw |= (uv1+uv2) | 32768
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txt.print_uwhex(uw, 1)
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txt.chrout('\n')
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uw = $1111
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uw ^= (uv1+uv2) | 32768
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txt.print_uwhex(uw, 1)
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txt.chrout('\n')
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test_stack.test()
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