mirror of
https://github.com/irmen/prog8.git
synced 2025-01-14 01:29:55 +00:00
cleaner return type
This commit is contained in:
Irmen de Jong
parent
4f7465ba44
commit
367a2a4cee
@ -555,13 +555,14 @@ internal class AsmGen(private val program: Program,
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internal fun asmVariableName(name: Iterable<String>) = fixNameSymbols(name.joinToString("."))
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internal fun loadByteFromPointerIntoA(pointervar: IdentifierReference): Pair<Boolean, String> {
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// returns if the pointer is already on the ZP itself or not (in the latter case SCRATCH_W1 is used as intermediary)
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internal fun loadByteFromPointerIntoA(pointervar: IdentifierReference): String {
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// returns the source name of the zero page pointervar if it's already in the ZP,
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// otherwise returns "P8ZP_SCRATCH_W1" which is the intermediary
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when (val target = pointervar.targetStatement(program)) {
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is Label -> {
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val sourceName = asmSymbolName(pointervar)
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out(" lda $sourceName")
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return Pair(true, sourceName)
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return sourceName
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}
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is VarDecl -> {
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val sourceName = asmVariableName(pointervar)
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@ -570,7 +571,7 @@ internal class AsmGen(private val program: Program,
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return if (isZpVar(scopedName)) {
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// pointervar is already in the zero page, no need to copy
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out(" lda ($sourceName)")
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Pair(true, sourceName)
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sourceName
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} else {
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out("""
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lda $sourceName
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@ -578,13 +579,13 @@ internal class AsmGen(private val program: Program,
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sta P8ZP_SCRATCH_W1
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sty P8ZP_SCRATCH_W1+1
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lda (P8ZP_SCRATCH_W1)""")
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Pair(false, sourceName)
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"P8ZP_SCRATCH_W1"
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}
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} else {
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return if (isZpVar(scopedName)) {
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// pointervar is already in the zero page, no need to copy
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out(" ldy #0 | lda ($sourceName),y")
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Pair(true, sourceName)
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sourceName
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} else {
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out("""
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lda $sourceName
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@ -593,7 +594,7 @@ internal class AsmGen(private val program: Program,
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sty P8ZP_SCRATCH_W1+1
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ldy #0
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lda (P8ZP_SCRATCH_W1),y""")
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Pair(false, sourceName)
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"P8ZP_SCRATCH_W1"
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}
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}
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}
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@ -293,7 +293,6 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
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private fun inplaceModification_byte_value_to_pointer(pointervar: IdentifierReference, operator: String, value: Expression) {
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asmgen.assignExpressionToVariable(value, "P8ZP_SCRATCH_B1", DataType.UBYTE, null)
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(pointervar)
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when (operator) {
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// note: ** (power) operator requires floats.
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"+" -> asmgen.out(" clc | adc P8ZP_SCRATCH_B1")
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@ -324,15 +323,13 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
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"^", "xor" -> asmgen.out(" eor P8ZP_SCRATCH_B1")
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else -> throw AssemblyError("invalid operator for in-place modification $operator")
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}
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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val sourceName = asmgen.loadByteFromPointerIntoA(pointervar)
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asmgen.out(" sta ($sourceName),y")
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}
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private fun inplaceModification_byte_variable_to_pointer(pointervar: IdentifierReference, operator: String, value: IdentifierReference) {
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val otherName = asmgen.asmVariableName(value)
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(pointervar)
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val sourceName = asmgen.loadByteFromPointerIntoA(pointervar)
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when (operator) {
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// note: ** (power) operator requires floats.
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@ -364,105 +361,72 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
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"^", "xor" -> asmgen.out(" eor $otherName")
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else -> throw AssemblyError("invalid operator for in-place modification $operator")
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}
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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asmgen.out(" sta ($sourceName),y")
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}
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private fun inplaceModification_byte_litval_to_pointer(pointervar: IdentifierReference, operator: String, value: Int) {
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when (operator) {
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// note: ** (power) operator requires floats.
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"+" -> {
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(pointervar)
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asmgen.out(" clc | adc #$value")
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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val sourceName = asmgen.loadByteFromPointerIntoA(pointervar)
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asmgen.out(" clc | adc #$value")
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asmgen.out(" sta ($sourceName),y")
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}
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"-" -> {
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(pointervar)
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asmgen.out(" sec | sbc #$value")
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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val sourceName = asmgen.loadByteFromPointerIntoA(pointervar)
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asmgen.out(" sec | sbc #$value")
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asmgen.out(" sta ($sourceName),y")
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}
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"*" -> {
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(pointervar)
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val sourceName = asmgen.loadByteFromPointerIntoA(pointervar)
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if(value in asmgen.optimizedByteMultiplications)
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asmgen.out(" jsr math.mul_byte_${value}")
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else
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asmgen.out(" ldy #$value | jsr math.multiply_bytes | ldy #0")
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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asmgen.out(" sta ($sourceName),y")
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}
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"/" -> {
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(pointervar)
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val sourceName = asmgen.loadByteFromPointerIntoA(pointervar)
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if(value==0)
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throw AssemblyError("division by zero")
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asmgen.out(" ldy #$value | jsr math.divmod_ub_asm | tya | ldy #0")
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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asmgen.out(" sta ($sourceName),y")
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}
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"%" -> {
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(pointervar)
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val sourceName = asmgen.loadByteFromPointerIntoA(pointervar)
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if(value==0)
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throw AssemblyError("division by zero")
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asmgen.out(" ldy #$value | jsr math.divmod_ub_asm | ldy #0")
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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asmgen.out(" sta ($sourceName),y")
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}
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"<<" -> {
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if (value > 0) {
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(pointervar)
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val sourceName = asmgen.loadByteFromPointerIntoA(pointervar)
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repeat(value) { asmgen.out(" asl a") }
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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asmgen.out(" sta ($sourceName),y")
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}
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}
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">>" -> {
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if (value > 0) {
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(pointervar)
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val sourceName = asmgen.loadByteFromPointerIntoA(pointervar)
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repeat(value) { asmgen.out(" lsr a") }
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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asmgen.out(" sta ($sourceName),y")
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}
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}
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"&", "and" -> {
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(pointervar)
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asmgen.out(" and #$value")
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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val sourceName = asmgen.loadByteFromPointerIntoA(pointervar)
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asmgen.out(" and #$value")
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asmgen.out(" sta ($sourceName),y")
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}
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"|", "or" -> {
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(pointervar)
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asmgen.out(" ora #$value")
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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val sourceName = asmgen.loadByteFromPointerIntoA(pointervar)
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asmgen.out(" ora #$value")
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asmgen.out(" sta ($sourceName),y")
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}
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"^", "xor" -> {
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(pointervar)
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asmgen.out(" eor #$value")
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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val sourceName = asmgen.loadByteFromPointerIntoA(pointervar)
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asmgen.out(" eor #$value")
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asmgen.out(" sta ($sourceName),y")
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}
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else -> throw AssemblyError("invalid operator for in-place modification $operator")
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}
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@ -1766,15 +1730,12 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
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sta $addr""")
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}
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is IdentifierReference -> {
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(mem.addressExpression as IdentifierReference)
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val sourceName = asmgen.loadByteFromPointerIntoA(mem.addressExpression as IdentifierReference)
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asmgen.out("""
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beq +
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lda #1
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+ eor #1""")
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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asmgen.out(" sta ($sourceName),y")
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}
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else -> {
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asmgen.assignExpressionToVariable(mem.addressExpression, "P8ZP_SCRATCH_W2", DataType.UWORD, target.scope)
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@ -1837,12 +1798,9 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
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sta $addr""")
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}
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is IdentifierReference -> {
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val (ptrOnZp, sourceName) = asmgen.loadByteFromPointerIntoA(memory.addressExpression as IdentifierReference)
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val sourceName = asmgen.loadByteFromPointerIntoA(memory.addressExpression as IdentifierReference)
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asmgen.out(" eor #255")
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if(ptrOnZp)
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asmgen.out(" sta ($sourceName),y")
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else
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asmgen.out(" sta (P8ZP_SCRATCH_W1),y")
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asmgen.out(" sta ($sourceName),y")
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}
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else -> {
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asmgen.assignExpressionToVariable(memory.addressExpression, "P8ZP_SCRATCH_W2", DataType.UWORD, target.scope)
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