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Fix issues in shuffle decoding around VPERM* instructions. Fix shuffle decoding for VSHUFPS/D for 256-bit types. Add pattern matching for memory forms of VPERMILPS/VPERMILPD.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145390 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper
2011-11-29 07:49:05 +00:00
parent 5d2f8c3155
commit 36e36ace77
6 changed files with 90 additions and 30 deletions
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32
lib/Target/X86/Utils/X86ShuffleDecode.cpp
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@@ -128,17 +128,27 @@ void DecodePUNPCKHMask(unsigned NElts,
}
}
void DecodeSHUFPSMask(unsigned NElts, unsigned Imm,
SmallVectorImpl<unsigned> &ShuffleMask) {
// Part that reads from dest.
for (unsigned i = 0; i != NElts/2; ++i) {
ShuffleMask.push_back(Imm % NElts);
Imm /= NElts;
}
// Part that reads from src.
for (unsigned i = 0; i != NElts/2; ++i) {
ShuffleMask.push_back(Imm % NElts + NElts);
Imm /= NElts;
void DecodeSHUFPMask(EVT VT, unsigned Imm,
SmallVectorImpl<unsigned> &ShuffleMask) {
unsigned NumElts = VT.getVectorNumElements();
unsigned NumLanes = VT.getSizeInBits() / 128;
unsigned NumLaneElts = NumElts / NumLanes;
int NewImm = Imm;
for (unsigned l = 0; l < NumLanes; ++l) {
unsigned LaneStart = l * NumLaneElts;
// Part that reads from dest.
for (unsigned i = 0; i != NumLaneElts/2; ++i) {
ShuffleMask.push_back(NewImm % NumLaneElts + LaneStart);
NewImm /= NumLaneElts;
}
// Part that reads from src.
for (unsigned i = 0; i != NumLaneElts/2; ++i) {
ShuffleMask.push_back(NewImm % NumLaneElts + NumElts + LaneStart);
NewImm /= NumLaneElts;
}
if (NumLaneElts == 4) NewImm = Imm; // reload imm
}
}