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OpcodeDispatcher: improve bmi2 shift

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allow upper garbage, use simpler clean.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
This commit is contained in:
Alyssa Rosenzweig 2024-05-31 10:42:37 -04:00
parent 7bd036d1ae
commit 0413a6bf68
1 changed files with 9 additions and 11 deletions
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20
FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
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@ -1859,21 +1859,19 @@ void OpDispatchBuilder::BMI2Shift(OpcodeArgs) {
const auto SrcSize = Op->Src[0].IsGPR() ? GPRSize : Size;
auto* Src = LoadSource_WithOpSize(GPRClass, Op, Op->Src[0], SrcSize, Op->Flags);
auto* Shift = LoadSource_WithOpSize(GPRClass, Op, Op->Src[1], GPRSize, Op->Flags);
auto* Shift = LoadSource_WithOpSize(GPRClass, Op, Op->Src[1], GPRSize, Op->Flags, {.AllowUpperGarbage = true});
auto* Result = [&]() -> OrderedNode* {
OrderedNode* Result;
if (Op->OP == 0x6F7) {
// SARX
if (Op->OP == 0x6F7) {
return _Ashr(IR::SizeToOpSize(Size), Src, Shift);
}
Result = _Ashr(IR::SizeToOpSize(Size), Src, Shift);
} else if (Op->OP == 0x5F7) {
// SHLX
if (Op->OP == 0x5F7) {
return _Lshl(IR::SizeToOpSize(Size), Src, Shift);
}
Result = _Lshl(IR::SizeToOpSize(Size), Src, Shift);
} else {
// SHRX
return _Lshr(IR::SizeToOpSize(Size), Src, Shift);
}();
Result = _Lshr(IR::SizeToOpSize(Size), Src, Shift);
}
StoreResult(GPRClass, Op, Result, -1);
}