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OpcodeDispatcher: eliminate Bfe's with lea

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Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
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Alyssa Rosenzweig committed 2024-05-21 16:39:00 -04:00
1 parent e3e7f0279c
commit 465dbc260f
1 file changed
+3 -8
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FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
+3 -8
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@@ -168,17 +168,12 @@ void OpDispatchBuilder::LEAOp(OpcodeArgs) {
X86Tables::DecodeFlags::GetOpAddr(Op->Flags, 0) == X86Tables::DecodeFlags::FLAG_WIDENING_SIZE_LAST ? 8 :
4;
auto Src = LoadSource_WithOpSize(GPRClass, Op, Op->Src[0], SrcSize, Op->Flags, {.LoadData = false});
if (DstSize != SrcSize) {
// If the SrcSize isn't the DstSize then we need to zero extend.
const uint8_t GPRSize = CTX->GetGPRSize();
Src = _Bfe(IR::SizeToOpSize(GPRSize), SrcSize * 8, 0, Src);
}
auto Src = LoadSource_WithOpSize(GPRClass, Op, Op->Src[0], SrcSize, Op->Flags, {.LoadData = false, .AllowUpperGarbage = SrcSize > DstSize});
StoreResult_WithOpSize(GPRClass, Op, Op->Dest, Src, DstSize, -1);
} else {
uint32_t DstSize = X86Tables::DecodeFlags::GetOpAddr(Op->Flags, 0) == X86Tables::DecodeFlags::FLAG_OPERAND_SIZE_LAST ? 2 : 4;
auto Src = LoadSource_WithOpSize(GPRClass, Op, Op->Src[0], SrcSize, Op->Flags, {.LoadData = false});
auto Src = LoadSource_WithOpSize(GPRClass, Op, Op->Src[0], SrcSize, Op->Flags, {.LoadData = false, .AllowUpperGarbage = SrcSize > DstSize});
StoreResult_WithOpSize(GPRClass, Op, Op->Dest, Src, DstSize, -1);
}
}
@@ -4378,7 +4373,7 @@ OrderedNode* OpDispatchBuilder::LoadSource_WithOpSize(RegisterClassType Class, c
LOGMAN_MSG_A_FMT("Unknown Src Type: {}\n", Operand.Type);
}
if (LoadableType && AddrSize < GPRSize) {
if (LoadableType && AddrSize < GPRSize && (LoadData || !AllowUpperGarbage)) {
// For 64-bit AddrSize can be 32-bit or 64-bit
// For 32-bit AddrSize can be 32-bit or 16-bit
//