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OpcodeDispatcher: Fixes 16-bit movbe to memory

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Ryan Houdek committed 2025-09-12 12:42:18 -07:00
1 parent 58526d4faa
commit d6a466ac0b
1 file changed
+5 -5
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FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
+5 -5
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@@ -4709,18 +4709,18 @@ void OpDispatchBuilder::MOVBEOp(OpcodeArgs) {
const auto SrcSize = OpSizeFromSrc(Op);
Ref Src = LoadSource(GPRClass, Op, Op->Src[0], Op->Flags, {.Align = OpSize::i8Bit});
Src = _Rev(std::max(OpSize::i32Bit, SrcSize), Src);
if (SrcSize == OpSize::i16Bit) {
if (DestIsMem(Op) || SrcSize != OpSize::i16Bit) {
Src = _Rev(SrcSize, Src);
StoreResult(GPRClass, Op, Op->Dest, Src, OpSize::iInvalid);
} else {
Src = _Rev(std::max(OpSize::i32Bit, SrcSize), Src);
// 16-bit does an insert.
// Rev of 16-bit value as 32-bit replaces the result in the upper 16-bits of the result.
// bfxil the 16-bit result in to the GPR.
Ref Dest = LoadSource_WithOpSize(GPRClass, Op, Op->Dest, GPRSize, Op->Flags);
auto Result = _Bfxil(GPRSize, 16, 16, Dest, Src);
StoreResult_WithOpSize(GPRClass, Op, Op->Dest, Result, GPRSize, OpSize::iInvalid);
} else {
// 32-bit does regular zext
StoreResult(GPRClass, Op, Op->Dest, Src, OpSize::iInvalid);
}
}