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optimized code for (infrequently used) logical operations on word array
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513611c5a6
commit
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@ -457,7 +457,6 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
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}
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}
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private fun inplacemodificationRegisterAXwithVariable(operator: String, variable: String, varDt: DataType): Boolean {
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private fun inplacemodificationRegisterAXwithVariable(operator: String, variable: String, varDt: DataType): Boolean {
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// note: we only optimize addition and subtraction, and these are the same for unsigned or signed.
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when(operator) {
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when(operator) {
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"+" -> {
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"+" -> {
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return if(varDt in WordDatatypes) {
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return if(varDt in WordDatatypes) {
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@ -507,12 +506,44 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
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true
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true
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}
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}
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}
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}
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else -> return false // TODO optimize more operators, such as the bitwise logical ones? Might need to know if signed
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"|" -> {
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asmgen.out("""
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ora $variable
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tay
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txa
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ora $variable+1
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tax
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tya
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""")
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return true
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}
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"&" -> {
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asmgen.out("""
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and $variable
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tay
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txa
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and $variable+1
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tax
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tya
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""")
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return true
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}
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"^" -> {
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asmgen.out("""
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eor $variable
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tay
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txa
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eor $variable+1
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tax
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tya
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""")
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return true
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}
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else -> return false
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}
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}
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}
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}
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private fun inplacemodificationRegisterAXwithLiteralval(operator: String, number: Int): Boolean {
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private fun inplacemodificationRegisterAXwithLiteralval(operator: String, number: Int): Boolean {
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// note: we only optimize addition and subtraction, and these are the same for unsigned or signed.
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when(operator) {
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when(operator) {
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"+" -> {
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"+" -> {
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return if(number in -128..255) {
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return if(number in -128..255) {
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@ -556,7 +587,40 @@ internal class AugmentableAssignmentAsmGen(private val program: PtProgram,
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true
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true
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}
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}
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}
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}
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else -> return false // TODO optimize more operators, such as the bitwise logical ones? Might need to know if signed
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"|" -> {
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asmgen.out("""
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ora #<$number
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tay
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txa
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ora #>$number
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tax
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tya
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""")
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return true
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}
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"&" -> {
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asmgen.out("""
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and #<$number
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tay
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txa
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and #>$number
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tax
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tya
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""")
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return true
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}
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"^" -> {
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asmgen.out("""
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eor #<$number
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tay
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txa
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eor #>$number
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tax
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tya
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""")
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return true
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}
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else -> return false
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}
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}
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}
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}
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@ -5,10 +5,24 @@
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main {
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main {
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sub start() {
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sub start() {
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ubyte lower = 123
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uword[] array = [$1010,$2020,$3030,$4040,$5050]
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ubyte upper = 0
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ubyte index = 2
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uword ww = mkword(upper, lower)
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uword value = $0205
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txt.print_uwhex(ww, true)
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array[index] ^= $0205
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txt.print_uwhex(array[2], true)
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txt.nl()
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array[index]+=9
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txt.print_uwhex(array[2], true)
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txt.nl()
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array[index] = $3030
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array[index] |= value
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txt.print_uwhex(array[2], true)
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txt.nl()
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; TODO met var array[index]|=index
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}
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}
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}
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}
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