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Variable vector_shl int8.

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This commit is contained in:
Ben Vanik
2014-05-27 13:02:00 -07:00
parent 7635bb71a0
commit e32342e956
3 changed files with 37 additions and 1 deletions
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36
src/alloy/backend/x64/x64_sequences.cc
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@@ -3734,7 +3734,41 @@ EMITTER(VECTOR_SHL_V128, MATCH(I<OPCODE_VECTOR_SHL, V128<>, V128<>, V128<>>)) {
}
} else {
// Fully variable shift.
XEASSERTALWAYS();
// TODO(benvanik): find a better sequence.
Xmm temp = i.dest;
if (i.dest == i.src1 || i.dest == i.src2) {
temp = e.xmm2;
}
auto byte_mask = e.GetXmmConstPtr(XMMShiftByteMask);
// AABBCCDD|EEFFGGHH|IIJJKKLL|MMNNOOPP
// DD| HH| LL| PP
e.vpand(e.xmm0, i.src1, byte_mask);
e.vpand(e.xmm1, i.src2, byte_mask);
e.vpsllvd(temp, e.xmm0, e.xmm1);
// CC | GG | KK | OO
e.vpsrld(e.xmm0, i.src1, 8);
e.vpand(e.xmm0, byte_mask);
e.vpsrld(e.xmm1, i.src2, 8);
e.vpand(e.xmm1, byte_mask);
e.vpsllvd(e.xmm0, e.xmm0, e.xmm1);
e.vpslld(e.xmm0, 8);
e.vpor(temp, e.xmm0);
// BB | FF | JJ | NN
e.vpsrld(e.xmm0, i.src1, 16);
e.vpand(e.xmm0, byte_mask);
e.vpsrld(e.xmm1, i.src2, 16);
e.vpand(e.xmm1, byte_mask);
e.vpsllvd(e.xmm0, e.xmm0, e.xmm1);
e.vpslld(e.xmm0, 16);
e.vpor(temp, e.xmm0);
// AA |EE |II |MM
e.vpsrld(e.xmm0, i.src1, 24);
e.vpand(e.xmm0, byte_mask);
e.vpsrld(e.xmm1, i.src2, 24);
e.vpand(e.xmm1, byte_mask);
e.vpsllvd(e.xmm0, e.xmm0, e.xmm1);
e.vpslld(e.xmm0, 24);
e.vpor(i.dest, temp, e.xmm0);
}
}
static void EmitInt16(X64Emitter& e, const EmitArgType& i) {