forked from OSchip/llvm-project
[X86] Use getUnpackl/getUnpackh instead of hardcoding a shuffle mask.
llvm-svn: 347127
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7570932977
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b05ea28f1f
llvm/lib/Target/X86
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@ -23369,10 +23369,9 @@ static SDValue LowerMUL(SDValue Op, const X86Subtarget &Subtarget,
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// We're going to mask off the low byte of each result element of the
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// pmullw, so it doesn't matter what's in the high byte of each 16-bit
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// element.
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const int LoShufMask[] = {0, -1, 1, -1, 2, -1, 3, -1,
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4, -1, 5, -1, 6, -1, 7, -1};
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SDValue ALo = DAG.getVectorShuffle(VT, dl, A, A, LoShufMask);
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SDValue BLo = DAG.getVectorShuffle(VT, dl, B, B, LoShufMask);
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SDValue Undef = DAG.getUNDEF(VT);
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SDValue ALo = getUnpackl(DAG, dl, VT, A, Undef);
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SDValue BLo = getUnpackl(DAG, dl, VT, B, Undef);
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ALo = DAG.getBitcast(ExVT, ALo);
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BLo = DAG.getBitcast(ExVT, BLo);
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@ -23380,10 +23379,8 @@ static SDValue LowerMUL(SDValue Op, const X86Subtarget &Subtarget,
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// We're going to mask off the low byte of each result element of the
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// pmullw, so it doesn't matter what's in the high byte of each 16-bit
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// element.
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const int HiShufMask[] = { 8, -1, 9, -1, 10, -1, 11, -1,
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12, -1, 13, -1, 14, -1, 15, -1};
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SDValue AHi = DAG.getVectorShuffle(VT, dl, A, A, HiShufMask);
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SDValue BHi = DAG.getVectorShuffle(VT, dl, B, B, HiShufMask);
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SDValue AHi = getUnpackh(DAG, dl, VT, A, Undef);
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SDValue BHi = getUnpackh(DAG, dl, VT, B, Undef);
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AHi = DAG.getBitcast(ExVT, AHi);
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BHi = DAG.getBitcast(ExVT, BHi);
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