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Constant src1 VectorSHL

This commit is contained in:
Ben Vanik 2014-08-06 13:07:01 -07:00
parent 2de7b6723d
commit 71ca8993b9
1 changed files with 5 additions and 5 deletions
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10
src/alloy/backend/x64/x64_sequences.cc
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@ -4211,18 +4211,18 @@ EMITTER(VECTOR_SHL_V128, MATCH(I<OPCODE_VECTOR_SHL, V128<>, V128<>, V128<>>)) {
} else {
// Fully variable shift.
// TODO(benvanik): find a better sequence.
Xmm temp = i.dest;
if (i.dest == i.src1 || i.dest == i.src2) {
temp = e.xmm2;
Xmm src1 = !i.src1.is_constant ? i.src1 : e.xmm2;
if (i.src1.is_constant) {
e.LoadConstantXmm(src1, i.src1.constant());
}
// Even:
e.vpand(e.xmm0, i.src2, e.GetXmmConstPtr(XMMShiftMaskEvenPI16));
e.vpsllvd(e.xmm1, i.src1, e.xmm0);
e.vpsllvd(e.xmm1, src1, e.xmm0);
e.vpand(e.xmm1, e.GetXmmConstPtr(XMMMaskEvenPI16));
// Odd:
e.vpsrld(e.xmm0, i.src2, 16);
e.vpand(e.xmm0, e.GetXmmConstPtr(XMMShiftMaskEvenPI16));
e.vpsrld(i.dest, i.src1, 16);
e.vpsrld(i.dest, src1, 16);
e.vpsllvd(i.dest, i.dest, e.xmm0);
e.vpslld(i.dest, 8);
// Merge: