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emit_x64_vector: Provide AVX path for EmitVectorMaxU64()

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Lioncash 2018-08-31 12:03:47 -04:00 committed by MerryMage
parent 8fb90c0cf1
commit 770723f449
1 changed files with 17 additions and 0 deletions
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17
src/backend/x64/emit_x64_vector.cpp
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@ -1353,6 +1353,23 @@ void EmitX64::EmitVectorMaxU64(EmitContext& ctx, IR::Inst* inst) {
return;
}
if (code.DoesCpuSupport(Xbyak::util::Cpu::tAVX)) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm x = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm y = ctx.reg_alloc.UseXmm(args[1]);
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
code.vmovdqa(xmm0, code.MConst(xword, 0x8000000000000000, 0x8000000000000000));
code.vpsubq(tmp, y, xmm0);
code.vpsubq(xmm0, x, xmm0);
code.vpcmpgtq(xmm0, tmp, xmm0);
code.pblendvb(x, y);
ctx.reg_alloc.DefineValue(inst, x);
return;
}
EmitTwoArgumentFallback(code, ctx, inst, [](VectorArray<u64>& result, const VectorArray<u64>& a, const VectorArray<u64>& b) {
std::transform(a.begin(), a.end(), b.begin(), result.begin(), [](auto x, auto y) { return std::max(x, y); });
});