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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2013-01-26 13:31:37 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2013-01-26 13:31:37 +0000 |
| commit | 6a93596538cf7e49803721fd6b1603fd61588c2c (patch) | |
| tree | aa7992b8f9ba1c87a4bcacc1ae8770e08f065548 /llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp | |
| parent | 675911d99c2d10820775c58ff66aadc2de46da20 (diff) | |
| download | llvm-6a93596538cf7e49803721fd6b1603fd61588c2c.zip llvm-6a93596538cf7e49803721fd6b1603fd61588c2c.tar.gz llvm-6a93596538cf7e49803721fd6b1603fd61588c2c.tar.bz2 | |
X86: Decode PALIGN operands so I don't have to do it in my head.
llvm-svn: 173572
Diffstat (limited to 'llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp b/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp index 8b87c1f..9694808 100644 --- a/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp +++ b/llvm/lib/Target/X86/Utils/X86ShuffleDecode.cpp @@ -61,6 +61,14 @@ void DecodeMOVLHPSMask(unsigned NElts, SmallVectorImpl<int> &ShuffleMask) { ShuffleMask.push_back(NElts+i); } +void DecodePALIGNMask(MVT VT, unsigned Imm, SmallVectorImpl<int> &ShuffleMask) { + unsigned NumElts = VT.getVectorNumElements(); + unsigned Offset = Imm * (VT.getVectorElementType().getSizeInBits() / 8); + + for (unsigned i = 0; i != NumElts; ++i) + ShuffleMask.push_back((i + Offset) % (NumElts * 2)); +} + /// DecodePSHUFMask - This decodes the shuffle masks for pshufd, and vpermilp*. /// VT indicates the type of the vector allowing it to handle different /// datatypes and vector widths. |