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emit_x64_vector: Add SSE4.1 implementation for EmitVectorMultiply64

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This commit is contained in:
MerryMage 2018-02-11 10:47:22 +00:00
parent b062266b8e
commit bf2cd92da9
1 changed files with 20 additions and 0 deletions
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20
src/backend_x64/emit_x64_vector.cpp
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@ -641,6 +641,26 @@ void EmitX64::EmitVectorMultiply32(EmitContext& ctx, IR::Inst* inst) {
}
void EmitX64::EmitVectorMultiply64(EmitContext& ctx, IR::Inst* 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();
Xbyak::Reg64 tmp2 = ctx.reg_alloc.ScratchGpr();
code.movq(tmp1, a);
code.movq(tmp2, b);
code.imul(tmp2, tmp1);
code.pextrq(tmp1, a, 1);
code.movq(a, tmp2);
code.pextrq(tmp2, b, 1);
code.imul(tmp1, tmp2);
code.pinsrq(a, tmp1, 1);
ctx.reg_alloc.DefineValue(inst, a);
return;
}
EmitTwoArgumentFallback(code, ctx, inst, [](std::array<u64, 2>& result, const std::array<u64, 2>& a, const std::array<u64, 2>& b){
for (size_t i = 0; i < 2; ++i) {
result[i] = a[i] * b[i];