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float-const comparison optimizations
This commit is contained in:
Irmen de Jong
parent
38d06a7e94
commit
8136f3df5c
@ -32,7 +32,8 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
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}
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internal fun translateComparisonExpressionWithJumpIfFalse(expr: BinaryExpression, jumpIfFalseLabel: String) {
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// first, if it is of the form: <constvalue> <comparison> X , swap the operands around
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// first, if it is of the form: <constvalue> <comparison> X , swap the operands around,
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// so that the constant value is always the right operand.
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var left = expr.left
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var right = expr.right
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var operator = expr.operator
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@ -182,7 +183,26 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
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}
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private fun translateFloatLessJump(left: Expression, right: Expression, leftConstVal: NumericLiteralValue?, rightConstVal: NumericLiteralValue?, jumpIfFalseLabel: String) {
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if(left is IdentifierReference && right is IdentifierReference) {
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if(leftConstVal!=null && rightConstVal!=null) {
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throw AssemblyError("const-compare should have been optimized away")
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}
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else if(leftConstVal!=null && right is IdentifierReference) {
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throw AssemblyError("const-compare should have been optimized to have const as right operand")
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}
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else if(left is IdentifierReference && rightConstVal!=null) {
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val leftName = asmgen.asmVariableName(left)
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val rightName = asmgen.getFloatAsmConst(rightConstVal.number.toDouble())
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asmgen.out("""
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lda #<$rightName
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ldy #>$rightName
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sta P8ZP_SCRATCH_W2
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sty P8ZP_SCRATCH_W2+1
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lda #<$leftName
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ldy #>$leftName
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jsr floats.vars_less_f
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beq $jumpIfFalseLabel""")
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}
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else if(left is IdentifierReference && right is IdentifierReference) {
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val leftName = asmgen.asmVariableName(left)
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val rightName = asmgen.asmVariableName(right)
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asmgen.out("""
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@ -204,7 +224,26 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
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}
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private fun translateFloatLessOrEqualJump(left: Expression, right: Expression, leftConstVal: NumericLiteralValue?, rightConstVal: NumericLiteralValue?, jumpIfFalseLabel: String) {
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if(left is IdentifierReference && right is IdentifierReference) {
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if(leftConstVal!=null && rightConstVal!=null) {
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throw AssemblyError("const-compare should have been optimized away")
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}
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else if(leftConstVal!=null && right is IdentifierReference) {
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throw AssemblyError("const-compare should have been optimized to have const as right operand")
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}
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else if(left is IdentifierReference && rightConstVal!=null) {
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val leftName = asmgen.asmVariableName(left)
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val rightName = asmgen.getFloatAsmConst(rightConstVal.number.toDouble())
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asmgen.out("""
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lda #<$rightName
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ldy #>$rightName
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sta P8ZP_SCRATCH_W2
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sty P8ZP_SCRATCH_W2+1
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lda #<$leftName
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ldy #>$leftName
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jsr floats.vars_lesseq_f
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beq $jumpIfFalseLabel""")
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}
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else if(left is IdentifierReference && right is IdentifierReference) {
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val leftName = asmgen.asmVariableName(left)
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val rightName = asmgen.asmVariableName(right)
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asmgen.out("""
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@ -226,7 +265,26 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
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}
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private fun translateFloatGreaterJump(left: Expression, right: Expression, leftConstVal: NumericLiteralValue?, rightConstVal: NumericLiteralValue?, jumpIfFalseLabel: String) {
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if(left is IdentifierReference && right is IdentifierReference) {
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if(leftConstVal!=null && rightConstVal!=null) {
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throw AssemblyError("const-compare should have been optimized away")
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}
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else if(left is IdentifierReference && rightConstVal!=null) {
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val leftName = asmgen.asmVariableName(left)
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val rightName = asmgen.getFloatAsmConst(rightConstVal.number.toDouble())
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asmgen.out("""
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lda #<$leftName
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ldy #>$leftName
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sta P8ZP_SCRATCH_W2
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sty P8ZP_SCRATCH_W2+1
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lda #<$rightName
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ldy #>$rightName
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jsr floats.vars_less_f
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beq $jumpIfFalseLabel""")
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}
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else if(leftConstVal!=null && right is IdentifierReference) {
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throw AssemblyError("const-compare should have been optimized to have const as right operand")
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}
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else if(left is IdentifierReference && right is IdentifierReference) {
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val leftName = asmgen.asmVariableName(left)
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val rightName = asmgen.asmVariableName(right)
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asmgen.out("""
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@ -248,7 +306,26 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
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}
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private fun translateFloatGreaterOrEqualJump(left: Expression, right: Expression, leftConstVal: NumericLiteralValue?, rightConstVal: NumericLiteralValue?, jumpIfFalseLabel: String) {
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if(left is IdentifierReference && right is IdentifierReference) {
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if(leftConstVal!=null && rightConstVal!=null) {
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throw AssemblyError("const-compare should have been optimized away")
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}
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else if(left is IdentifierReference && rightConstVal!=null) {
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val leftName = asmgen.asmVariableName(left)
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val rightName = asmgen.getFloatAsmConst(rightConstVal.number.toDouble())
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asmgen.out("""
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lda #<$leftName
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ldy #>$leftName
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sta P8ZP_SCRATCH_W2
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sty P8ZP_SCRATCH_W2+1
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lda #<$rightName
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ldy #>$rightName
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jsr floats.vars_lesseq_f
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beq $jumpIfFalseLabel""")
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}
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else if(leftConstVal!=null && right is IdentifierReference) {
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throw AssemblyError("const-compare should have been optimized to have const as right operand")
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}
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else if(left is IdentifierReference && right is IdentifierReference) {
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val leftName = asmgen.asmVariableName(left)
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val rightName = asmgen.asmVariableName(right)
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asmgen.out("""
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@ -1006,7 +1083,26 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
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}
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}
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if(left is IdentifierReference && right is IdentifierReference) {
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if(leftConstVal!=null && rightConstVal!=null) {
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throw AssemblyError("const-compare should have been optimized away")
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}
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else if(leftConstVal!=null && right is IdentifierReference) {
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throw AssemblyError("const-compare should have been optimized to have const as right operand")
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}
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else if(left is IdentifierReference && rightConstVal!=null) {
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val leftName = asmgen.asmVariableName(left)
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val rightName = asmgen.getFloatAsmConst(rightConstVal.number.toDouble())
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asmgen.out("""
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lda #<$leftName
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ldy #>$leftName
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sta P8ZP_SCRATCH_W1
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sty P8ZP_SCRATCH_W1+1
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lda #<$rightName
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ldy #>$rightName
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jsr floats.vars_equal_f
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beq $jumpIfFalseLabel""")
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}
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else if(left is IdentifierReference && right is IdentifierReference) {
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val leftName = asmgen.asmVariableName(left)
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val rightName = asmgen.asmVariableName(right)
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asmgen.out("""
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@ -1068,7 +1164,26 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
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}
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}
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if(left is IdentifierReference && right is IdentifierReference) {
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if(leftConstVal!=null && rightConstVal!=null) {
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throw AssemblyError("const-compare should have been optimized away")
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}
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else if(leftConstVal!=null && right is IdentifierReference) {
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throw AssemblyError("const-compare should have been optimized to have const as right operand")
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}
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else if(left is IdentifierReference && rightConstVal!=null) {
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val leftName = asmgen.asmVariableName(left)
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val rightName = asmgen.getFloatAsmConst(rightConstVal.number.toDouble())
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asmgen.out("""
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lda #<$leftName
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ldy #>$leftName
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sta P8ZP_SCRATCH_W1
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sty P8ZP_SCRATCH_W1+1
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lda #<$rightName
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ldy #>$rightName
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jsr floats.vars_equal_f
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bne $jumpIfFalseLabel""")
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}
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else if(left is IdentifierReference && right is IdentifierReference) {
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val leftName = asmgen.asmVariableName(left)
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val rightName = asmgen.asmVariableName(right)
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asmgen.out("""
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@ -7,17 +7,10 @@ main {
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sub start() {
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byte ub1
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byte ub2
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byte bb1
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byte bb2
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float uw1
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float uw2
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word ww1
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word ww2
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const float uw2 = 2.2
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uw1 = 1.1
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uw2 = 2.2
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if uw1<uw2
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txt.chrout('.')
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else
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@ -46,8 +39,7 @@ main {
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txt.chrout(' ')
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uw1 = -1.1
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uw2 = -1.1
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uw1 = 2.2
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if uw1<uw2
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txt.chrout('!')
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