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emit_arm64_packed: Fix signed packed add sub

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This commit is contained in:
Merry
2022-07-30 12:19:06 +01:00
committed by merry
parent c8b3be5512
commit e73c390927
1 changed files with 8 additions and 3 deletions
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11
src/dynarmic/backend/arm64/emit_arm64_packed.cpp
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@@ -248,9 +248,14 @@ static void EmitPackedAddSub(oaknut::CodeGenerator& code, EmitContext& ctx, IR::
auto Vge = ctx.reg_alloc.WriteD(ge_inst);
RegAlloc::Realize(Vge);
code.CMEQ(Vge->H4(), Vresult->H4(), 0);
code.EOR(Vge->B8(), Vge->B8(), V2.B8());
code.SHRN(Vge->H4(), Vge->toQ().S4(), 16);
if (is_signed) {
code.CMGE(Vge->S2(), Vresult->S2(), 0);
code.XTN(Vge->H4(), Vge->toQ().S4());
} else {
code.CMEQ(Vge->H4(), Vresult->H4(), 0);
code.EOR(Vge->B8(), Vge->B8(), V2.B8());
code.SHRN(Vge->H4(), Vge->toQ().S4(), 16);
}
}
code.XTN(Vresult->H4(), Vresult->toQ().S4());