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OpcodeDispatcher: allow garbage with SCAS

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it's just feeding SUB flags which allow it

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
This commit is contained in:
Alyssa Rosenzweig 2024-02-27 09:53:03 -04:00
parent d24446ed13
commit ef2559d911
1 changed files with 2 additions and 2 deletions
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4
FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
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@ -3916,7 +3916,7 @@ void OpDispatchBuilder::SCASOp(OpcodeArgs) {
OrderedNode *Dest_RDI = LoadGPRRegister(X86State::REG_RDI);
Dest_RDI = AppendSegmentOffset(Dest_RDI, 0, FEXCore::X86Tables::DecodeFlags::FLAG_ES_PREFIX, true);
auto Src1 = LoadSource(GPRClass, Op, Op->Src[0], Op->Flags);
auto Src1 = LoadSource(GPRClass, Op, Op->Src[0], Op->Flags, {.AllowUpperGarbage = true});
auto Src2 = _LoadMemAutoTSO(GPRClass, Size, Dest_RDI, Size);
GenerateFlags_SUB(Op, Src1, Src2);
@ -3967,7 +3967,7 @@ void OpDispatchBuilder::SCASOp(OpcodeArgs) {
Dest_RDI = AppendSegmentOffset(Dest_RDI, 0, FEXCore::X86Tables::DecodeFlags::FLAG_ES_PREFIX, true);
auto Src1 = LoadSource(GPRClass, Op, Op->Src[0], Op->Flags);
auto Src1 = LoadSource(GPRClass, Op, Op->Src[0], Op->Flags, {.AllowUpperGarbage = true});
auto Src2 = _LoadMemAutoTSO(GPRClass, Size, Dest_RDI, Size);
GenerateFlags_SUB(Op, Src1, Src2);