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emit_x64_vector: Vectorize fallback case in EmitVectorMultiply64()

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Gets rid of the need to perform a fallback.
This commit is contained in:
Lioncash 2018-05-23 16:28:29 -04:00 committed by MerryMage
parent 954deff2d4
commit cf188448d4
1 changed files with 24 additions and 4 deletions
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28
src/backend_x64/emit_x64_vector.cpp
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@ -1464,8 +1464,9 @@ void EmitX64::EmitVectorMultiply64(EmitContext& ctx, IR::Inst* inst) {
return;
}
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
if (code.DoesCpuSupport(Xbyak::util::Cpu::tSSE41)) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
Xbyak::Xmm a = ctx.reg_alloc.UseScratchXmm(args[0]);
Xbyak::Xmm b = ctx.reg_alloc.UseXmm(args[1]);
Xbyak::Reg64 tmp1 = ctx.reg_alloc.ScratchGpr();
@ -1484,9 +1485,28 @@ void EmitX64::EmitVectorMultiply64(EmitContext& ctx, IR::Inst* inst) {
return;
}
EmitTwoArgumentFallback(code, ctx, inst, [](std::array<u64, 2>& result, const std::array<u64, 2>& a, const std::array<u64, 2>& b) {
std::transform(a.begin(), a.end(), b.begin(), result.begin(), std::multiplies<>());
});
const Xbyak::Xmm a = ctx.reg_alloc.UseXmm(args[0]);
const Xbyak::Xmm b = ctx.reg_alloc.UseScratchXmm(args[1]);
const Xbyak::Xmm tmp1 = ctx.reg_alloc.ScratchXmm();
const Xbyak::Xmm tmp2 = ctx.reg_alloc.ScratchXmm();
const Xbyak::Xmm tmp3 = ctx.reg_alloc.ScratchXmm();
code.movdqa(tmp1, a);
code.movdqa(tmp2, a);
code.movdqa(tmp3, b);
code.psrlq(tmp1, 32);
code.psrlq(tmp3, 32);
code.pmuludq(tmp2, b);
code.pmuludq(tmp3, a);
code.pmuludq(b, tmp1);
code.paddq(b, tmp3);
code.psllq(b, 32);
code.paddq(tmp2, b);
ctx.reg_alloc.DefineValue(inst, tmp2);
}
void EmitX64::EmitVectorNarrow16(EmitContext& ctx, IR::Inst* inst) {