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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2012-12-22 16:07:56 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2012-12-22 16:07:56 +0000 |
| commit | 76268ac682652e450b5c3333aa74cb5b9c1deeec (patch) | |
| tree | da1a3f065897a26b89c2b8938d664f65c7079194 /llvm/lib/CodeGen/MachineInstr.cpp | |
| parent | b2f0a2bd4b8064cb022df4f01f4da38f8b522df1 (diff) | |
| download | llvm-76268ac682652e450b5c3333aa74cb5b9c1deeec.zip llvm-76268ac682652e450b5c3333aa74cb5b9c1deeec.tar.gz llvm-76268ac682652e450b5c3333aa74cb5b9c1deeec.tar.bz2 | |
X86: Turn mul of <4 x i32> into pmuludq when no SSE4.1 is available.
pmuludq is slow, but it turns out that all the unpacking and packing of the
scalarized mul is even slower. 10% speedup on loop-vectorized paq8p.
llvm-svn: 170985
Diffstat (limited to 'llvm/lib/CodeGen/MachineInstr.cpp')
0 files changed, 0 insertions, 0 deletions