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emit_x64_vector: Remove fallback for EmitVectorSignExtend32()

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We can just do the extension manually, which gets rid of the need to
fall back here.
This commit is contained in:
Lioncash 2018-08-29 14:34:01 -04:00 committed by MerryMage
parent 053175f69b
commit 39593fcd26
1 changed files with 20 additions and 9 deletions
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29
src/backend/x64/emit_x64_vector.cpp
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@ -2465,19 +2465,30 @@ void EmitX64::EmitVectorSignExtend16(EmitContext& ctx, IR::Inst* inst) {
}
void EmitX64::EmitVectorSignExtend32(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm a = ctx.reg_alloc.UseScratchXmm(args[0]);
if (code.DoesCpuSupport(Xbyak::util::Cpu::tSSE41)) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm a = ctx.reg_alloc.UseScratchXmm(args[0]);
code.pmovsxdq(a, a);
ctx.reg_alloc.DefineValue(inst, a);
return;
} else {
const Xbyak::Xmm xmm_tmp = ctx.reg_alloc.ScratchXmm();
const Xbyak::Reg64 gpr_tmp1 = ctx.reg_alloc.ScratchGpr();
const Xbyak::Reg64 gpr_tmp2 = ctx.reg_alloc.ScratchGpr();
code.movd(gpr_tmp1.cvt32(), a);
code.movsxd(gpr_tmp1, gpr_tmp1.cvt32());
code.pshufd(a, a, 0b11100101);
code.movd(gpr_tmp2.cvt32(), a);
code.movsxd(gpr_tmp2, gpr_tmp2.cvt32());
code.movq(a, gpr_tmp1);
code.movq(xmm_tmp, gpr_tmp2);
code.punpcklqdq(a, xmm_tmp);
}
EmitOneArgumentFallback(code, ctx, inst, [](VectorArray<u64>& result, const VectorArray<u32>& a) {
for (size_t i = 0; i < result.size(); ++i) {
result[i] = Common::SignExtend<32, u64>(a[i]);
}
});
ctx.reg_alloc.DefineValue(inst, a);
}
void EmitX64::EmitVectorSignExtend64(EmitContext& ctx, IR::Inst* inst) {