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emit_x64_vector: AVX2 implementation of EmitVectorLogicalVShiftS32

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MerryMage 2018-09-23 10:21:49 +01:00
parent 94f9d402eb
commit 3bf183d7e8
1 changed files with 25 additions and 0 deletions
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25
src/backend/x64/emit_x64_vector.cpp
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@ -1377,6 +1377,31 @@ void EmitX64::EmitVectorLogicalVShiftS16(EmitContext& ctx, IR::Inst* inst) {
}
void EmitX64::EmitVectorLogicalVShiftS32(EmitContext& ctx, IR::Inst* inst) {
if (code.DoesCpuSupport(Xbyak::util::Cpu::tAVX2)) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm left_shift = ctx.reg_alloc.UseScratchXmm(args[1]);
const Xbyak::Xmm right_shift = ctx.reg_alloc.ScratchXmm();
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
code.vmovdqa(tmp, code.MConst(xword, 0x000000FF000000FF, 0x000000FF000000FF));
code.vpxor(right_shift, right_shift, right_shift);
code.vpsubd(right_shift, right_shift, left_shift);
code.vpslld(xmm0, left_shift, 24);
code.vpand(right_shift, right_shift, tmp);
code.vpand(left_shift, left_shift, tmp);
code.vpsravd(tmp, result, right_shift);
code.vpsllvd(result, result, left_shift);
code.blendvps(result, tmp);
ctx.reg_alloc.DefineValue(inst, result);
return;
}
EmitTwoArgumentFallback(code, ctx, inst, [](VectorArray<s32>& result, const VectorArray<s32>& a, const VectorArray<s32>& b) {
std::transform(a.begin(), a.end(), b.begin(), result.begin(), LogicalVShift<s32>);
});