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emit_x64_vector: Vectorize non-SSE4.1 fallback path for VectorMultiply32()

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Lioncash 2018-04-25 22:44:21 -04:00 committed by MerryMage
parent d70ee7c0d1
commit 0d20423ad5
1 changed files with 15 additions and 3 deletions
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18
src/backend_x64/emit_x64_vector.cpp
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@ -1117,9 +1117,21 @@ void EmitX64::EmitVectorMultiply32(EmitContext& ctx, IR::Inst* inst) {
return;
}
EmitTwoArgumentFallback(code, ctx, inst, [](std::array<u32, 4>& result, const std::array<u32, 4>& a, const std::array<u32, 4>& b){
std::transform(a.begin(), a.end(), b.begin(), result.begin(), std::multiplies<>());
});
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm a = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm b = ctx.reg_alloc.UseScratchXmm(args[1]);
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
code.movdqa(tmp, a);
code.psrlq(a, 32);
code.pmuludq(tmp, b);
code.psrlq(b, 32);
code.pmuludq(a, b);
code.pshufd(tmp, tmp, 0b00001000);
code.pshufd(b, a, 0b00001000);
code.punpckldq(tmp, b);
ctx.reg_alloc.DefineValue(inst, tmp);
}
void EmitX64::EmitVectorMultiply64(EmitContext& ctx, IR::Inst* inst) {