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optimize for loops over non const range, without translateExpression()
This commit is contained in:
Irmen de Jong
parent
ee724eb4f1
commit
afd155ac4f
@ -1,20 +1,16 @@
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package prog8.compiler.target.c64.codegen
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import prog8.ast.Program
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import prog8.ast.base.ArrayElementTypes
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import prog8.ast.base.DataType
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import prog8.ast.base.RegisterOrPair
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import prog8.ast.expressions.IdentifierReference
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import prog8.ast.expressions.RangeExpr
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import prog8.ast.statements.ForLoop
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import prog8.compiler.AssemblyError
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import prog8.compiler.target.c64.codegen.assignment.AsmAssignSource
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import prog8.compiler.target.c64.codegen.assignment.AsmAssignTarget
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import prog8.compiler.target.c64.codegen.assignment.AsmAssignment
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import prog8.compiler.target.c64.codegen.assignment.TargetStorageKind
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import prog8.compiler.toHex
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import kotlin.math.absoluteValue
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// todo reduce use of stack eval translateExpression()
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internal class ForLoopsAsmGen(private val program: Program, private val asmgen: AsmGen) {
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internal fun translate(stmt: ForLoop) {
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@ -53,23 +49,17 @@ internal class ForLoopsAsmGen(private val program: Program, private val asmgen:
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val incdec = if(stepsize==1) "inc" else "dec"
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// loop over byte range via loopvar
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val varname = asmgen.asmVariableName(stmt.loopVar)
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asmgen.translateExpression(range.to)
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asmgen.translateExpression(range.from)
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asmgen.assignExpressionToVariable(range.from, varname, ArrayElementTypes.getValue(iterableDt), null)
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asmgen.assignExpressionToVariable(range.to, "$modifiedLabel+1", ArrayElementTypes.getValue(iterableDt), null)
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asmgen.out(loopLabel)
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asmgen.translate(stmt.body)
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asmgen.out("""
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inx
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lda P8ESTACK_LO,x
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sta $varname
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lda P8ESTACK_LO+1,x
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sta $modifiedLabel+1
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$loopLabel""")
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asmgen.translate(stmt.body)
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asmgen.out("""
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lda $varname
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$modifiedLabel cmp #0 ; modified
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beq $endLabel
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$incdec $varname
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jmp $loopLabel
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$endLabel inx""")
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$endLabel""")
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} else {
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@ -77,18 +67,11 @@ $endLabel inx""")
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// loop over byte range via loopvar
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val varname = asmgen.asmVariableName(stmt.loopVar)
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asmgen.translateExpression(range.to)
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asmgen.translateExpression(range.from)
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asmgen.out("""
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inx
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lda P8ESTACK_LO,x
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sta $varname
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lda P8ESTACK_LO+1,x
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sta $modifiedLabel+1
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$loopLabel""")
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asmgen.assignExpressionToVariable(range.from, varname, ArrayElementTypes.getValue(iterableDt), null)
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asmgen.assignExpressionToVariable(range.to, "$modifiedLabel+1", ArrayElementTypes.getValue(iterableDt), null)
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asmgen.out(loopLabel)
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asmgen.translate(stmt.body)
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asmgen.out("""
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lda $varname""")
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asmgen.out(" lda $varname")
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if(stepsize>0) {
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asmgen.out("""
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clc
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@ -105,8 +88,7 @@ $modifiedLabel cmp #0 ; modified
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$modifiedLabel cmp #0 ; modified
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bcs $loopLabel""")
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}
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asmgen.out("""
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$endLabel inx""")
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asmgen.out(endLabel)
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}
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}
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DataType.ARRAY_W, DataType.ARRAY_UW -> {
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@ -115,13 +97,11 @@ $endLabel inx""")
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// words, step 1 or -1
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stepsize == 1 || stepsize == -1 -> {
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asmgen.translateExpression(range.to)
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assignLoopvar(stmt, range)
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val varname = asmgen.asmVariableName(stmt.loopVar)
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assignLoopvar(stmt, range)
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asmgen.assignExpressionToRegister(range.to, RegisterOrPair.AY)
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asmgen.out("""
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lda P8ESTACK_HI+1,x
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sta $modifiedLabel+1
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lda P8ESTACK_LO+1,x
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sty $modifiedLabel+1
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sta $modifiedLabel2+1
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$loopLabel""")
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asmgen.translate(stmt.body)
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@ -148,21 +128,17 @@ $modifiedLabel2 cmp #0 ; modified
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jmp $loopLabel""")
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}
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asmgen.out(endLabel)
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asmgen.out(" inx")
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}
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stepsize > 0 -> {
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// (u)words, step >= 2
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asmgen.translateExpression(range.to)
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asmgen.out("""
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lda P8ESTACK_HI+1,x
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sta $modifiedLabel+1
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lda P8ESTACK_LO+1,x
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sta $modifiedLabel2+1
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""")
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assignLoopvar(stmt, range)
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val varname = asmgen.asmVariableName(stmt.loopVar)
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asmgen.out(loopLabel)
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assignLoopvar(stmt, range)
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asmgen.assignExpressionToRegister(range.to, RegisterOrPair.AY)
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asmgen.out("""
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sty $modifiedLabel+1
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sta $modifiedLabel2+1
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$loopLabel""")
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asmgen.translate(stmt.body)
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if (iterableDt == DataType.ARRAY_UW) {
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@ -181,7 +157,7 @@ $modifiedLabel2 lda #0 ; modified
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cmp $varname
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bcc $endLabel
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bcs $loopLabel
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$endLabel inx""")
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$endLabel""")
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} else {
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asmgen.out("""
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lda $varname
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@ -198,22 +174,19 @@ $modifiedLabel lda #0 ; modified
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bvc +
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eor #$80
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+ bpl $loopLabel
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$endLabel inx""")
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$endLabel""")
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}
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}
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else -> {
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// (u)words, step <= -2
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asmgen.translateExpression(range.to)
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asmgen.out("""
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lda P8ESTACK_HI+1,x
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sta $modifiedLabel+1
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lda P8ESTACK_LO+1,x
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sta $modifiedLabel2+1
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""")
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assignLoopvar(stmt, range)
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val varname = asmgen.asmVariableName(stmt.loopVar)
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asmgen.out(loopLabel)
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assignLoopvar(stmt, range)
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asmgen.assignExpressionToRegister(range.to, RegisterOrPair.AY)
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asmgen.out("""
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sty $modifiedLabel+1
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sta $modifiedLabel2+1
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$loopLabel""")
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asmgen.translate(stmt.body)
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if(iterableDt==DataType.ARRAY_UW) {
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@ -231,7 +204,7 @@ $modifiedLabel cmp #0 ; modified
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lda $varname
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$modifiedLabel2 cmp #0 ; modified
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bcs $loopLabel
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$endLabel inx""")
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$endLabel""")
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} else {
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asmgen.out("""
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lda $varname
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@ -249,7 +222,7 @@ $modifiedLabel sbc #0 ; modified
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bvc +
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eor #$80
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+ bpl $loopLabel
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$endLabel inx""")
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$endLabel""")
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}
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}
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}
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@ -611,10 +584,6 @@ $endLabel""")
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asmgen.loopEndLabels.pop()
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}
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private fun assignLoopvar(stmt: ForLoop, range: RangeExpr) {
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val target = AsmAssignTarget(TargetStorageKind.VARIABLE, program, asmgen, stmt.loopVarDt(program).typeOrElse(DataType.STRUCT), stmt.definingSubroutine(), variableAsmName=asmgen.asmVariableName(stmt.loopVar))
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val src = AsmAssignSource.fromAstSource(range.from, program, asmgen).adjustSignedUnsigned(target)
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val assign = AsmAssignment(src, target, false, range.position)
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asmgen.translateNormalAssignment(assign)
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}
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private fun assignLoopvar(stmt: ForLoop, range: RangeExpr) =
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asmgen.assignExpressionToVariable(range.from, asmgen.asmVariableName(stmt.loopVar), stmt.loopVarDt(program).typeOrElse(DataType.STRUCT), stmt.definingSubroutine())
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}
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115
examples/test.p8
115
examples/test.p8
@ -1,62 +1,85 @@
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%import textio
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%import floats
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%zeropage basicsafe
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%import test_stack
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main {
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sub start() {
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ubyte ub = 30
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byte bb = -30
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float f1
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ubyte ub
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byte bb
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uword uw
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word ww
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f1 = ub
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floats.print_f(f1)
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txt.chrout('\n')
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f1 = bb
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floats.print_f(f1)
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ubyte arrub = 10
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uword arruw = 10
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byte arrb = 10
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word arrw = 10
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test_stack.test()
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for ub in 0 to arrub step 2 {
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txt.print_ub(ub)
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txt.chrout(',')
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}
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txt.chrout('\n')
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testX()
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}
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for ub in 5 to arrub step 2 {
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txt.print_ub(ub)
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txt.chrout(',')
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}
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txt.chrout('\n')
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sub ding(ubyte argument) -> ubyte {
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txt.chrout(' ')
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return argument*2
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}
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for uw in 0 to arruw step 2 {
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txt.print_uw(uw)
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txt.chrout(',')
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}
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txt.chrout('\n')
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sub dingw(uword argument) -> uword {
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txt.chrout(' ')
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return argument*2
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}
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for uw in 5 to arruw step 2 {
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txt.print_uw(uw)
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txt.chrout(',')
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}
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txt.chrout('\n')
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asmsub testX() {
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%asm {{
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stx _saveX
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lda #13
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jsr txt.chrout
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lda #'x'
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jsr txt.chrout
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lda #'='
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jsr txt.chrout
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lda _saveX
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jsr txt.print_ub
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lda #' '
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jsr txt.chrout
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lda #'s'
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jsr txt.chrout
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lda #'p'
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jsr txt.chrout
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lda #'='
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jsr txt.chrout
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tsx
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txa
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jsr txt.print_ub
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lda #13
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jsr txt.chrout
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ldx _saveX
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rts
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_saveX .byte 0
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}}
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for bb in 0 to arrb step 2 {
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txt.print_b(bb)
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txt.chrout(',')
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}
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txt.chrout('\n')
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for bb in -2 to arrb-2 step 2 {
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txt.print_b(bb)
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txt.chrout(',')
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}
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txt.chrout('\n')
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for ww in 0 to arrw step 2 {
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txt.print_w(ww)
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txt.chrout(',')
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}
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txt.chrout('\n')
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for ww in -2 to arrw-2 step 2{
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txt.print_w(ww)
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txt.chrout(',')
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}
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txt.chrout('\n')
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for bb in arrb-2 to -2 step -2 {
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txt.print_b(bb)
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txt.chrout(',')
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}
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txt.chrout('\n')
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for ww in arrw-2 to -2 step -2 {
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txt.print_w(ww)
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txt.chrout(',')
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}
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txt.chrout('\n')
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test_stack.test()
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txt.chrout('\n')
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}
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}
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47
examples/test_stack.p8
Normal file
47
examples/test_stack.p8
Normal file
@ -0,0 +1,47 @@
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test_stack {
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asmsub test() {
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%asm {{
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stx _saveX
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lda #13
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jsr txt.chrout
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lda #'-'
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ldy #12
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- jsr txt.chrout
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dey
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bne -
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lda #13
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jsr txt.chrout
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lda #'x'
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jsr txt.chrout
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lda #'='
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jsr txt.chrout
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lda _saveX
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jsr txt.print_ub
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lda #' '
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jsr txt.chrout
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lda #'s'
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jsr txt.chrout
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lda #'p'
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jsr txt.chrout
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lda #'='
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jsr txt.chrout
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tsx
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txa
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jsr txt.print_ub
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lda #13
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jsr txt.chrout
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lda #'-'
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ldy #12
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- jsr txt.chrout
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dey
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bne -
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lda #13
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jsr txt.chrout
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ldx _saveX
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rts
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_saveX .byte 0
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}}
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}
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}
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