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[x64] Zero extend on mov to 8bit register

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Herman S.
2025-10-15 15:55:59 +09:00
parent 15f61a1a10
commit 88b0aea272
1 changed files with 3 additions and 2 deletions
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5
src/xenia/cpu/backend/x64/x64_sequences.cc
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@@ -2847,9 +2847,10 @@ struct SHL_V128 : Sequence<SHL_V128, I<OPCODE_SHL, V128Op, V128Op, I8Op>> {
auto src1 = GetInputRegOrConstant(e, i.src1, e.xmm3); auto src1 = GetInputRegOrConstant(e, i.src1, e.xmm3);
if (i.src2.is_constant) { if (i.src2.is_constant) {
e.mov(e.GetNativeParam(1), i.src2.constant()); e.mov(e.GetNativeParam(0), i.src2.constant());
} else { } else {
e.mov(e.GetNativeParam(1), i.src2); // Zero-extend the 8-bit register to avoid garbage in upper bits
e.movzx(e.GetNativeParam(0).cvt32(), i.src2);
} }
e.lea(e.GetNativeParam(0), e.StashXmm(0, src1)); e.lea(e.GetNativeParam(0), e.StashXmm(0, src1));
e.CallNativeSafe(reinterpret_cast<void*>(EmulateShlV128)); e.CallNativeSafe(reinterpret_cast<void*>(EmulateShlV128));