2 Commits

Author	SHA1	Message	Date
Simon Pilgrim	2d0104cc47	[X86][SSE] Added SSSE3/AVX/AVX2 BITREVERSE tests ... Codegen is pretty bad at the moment but could use PSHUFB quite efficiently llvm-svn: 267347	2016-04-24 15:45:06 +00:00
Simon Pilgrim	b87ffe8519	[X86][XOP] BITREVERSE lowering using VPPERM ... XOP's VPPERM has some great 'permute operations' that it can do as well as part of shuffling the bytes of a 128-bit vector - in this case we use it to perform BITREVERSE in a single instruction. llvm-svn: 264870	2016-03-30 14:14:00 +00:00