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feat: Zero registers via XOR

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This commit is contained in:
Jonny 2025-02-26 21:39:23 +00:00
parent 09df7af2ab
commit 18534a64a6
1 changed files with 6 additions and 3 deletions
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9
src/main/wacc/backend/asmGenerator.scala
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@ -73,7 +73,7 @@ object asmGenerator {
funcPrologue(), funcPrologue(),
Chain.one(stack.align()), Chain.one(stack.align()),
main.foldMap(generateStmt(_)), main.foldMap(generateStmt(_)),
Chain.one(Move(RAX, ImmediateVal(0))), Chain.one(Xor(RAX, RAX)),
funcEpilogue(), funcEpilogue(),
generateBuiltInFuncs(), generateBuiltInFuncs(),
funcs.foldMap(generateUserFunc(_)) funcs.foldMap(generateUserFunc(_))
@ -143,7 +143,7 @@ object asmGenerator {
Chain( Chain(
stack.align(), stack.align(),
assemblyIR.Call(CLibFunc.PrintF), assemblyIR.Call(CLibFunc.PrintF),
Move(RDI, ImmediateVal(0)), Xor(RDI, RDI),
assemblyIR.Call(CLibFunc.Fflush) assemblyIR.Call(CLibFunc.Fflush)
) )
) )
@ -293,7 +293,10 @@ object asmGenerator {
case _ => // Other array types TODO case _ => // Other array types TODO
} }
case BoolLiter(v) => chain += stack.push(ImmediateVal(if (v) 1 else 0)) case BoolLiter(true) => chain += stack.push(ImmediateVal(1))
case BoolLiter(false) =>
chain += Xor(RAX, RAX)
chain += stack.push(RAX)
case NullLiter() => chain += stack.push(ImmediateVal(0)) case NullLiter() => chain += stack.push(ImmediateVal(0))
case ArrayElem(_, _) => // TODO: Implement handling case ArrayElem(_, _) => // TODO: Implement handling
case UnaryOp(x, op) => case UnaryOp(x, op) =>