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4 Commits

Author SHA1 Message Date
Nadav Rotem 7b3120b9ae On Sandybridge split unaligned 256bit stores into two xmm-sized stores. 
llvm-svn: 172894
 2013-01-19 08:38:41 +00:00
Nadav Rotem 7431211214 On Sandybridge loading unaligned 256bits using two XMM loads (vmovups and vinsertf128) is faster than using a single vmovups instruction. 
llvm-svn: 172868
 2013-01-18 23:10:30 +00:00
Nadav Rotem c8d7047fa9 AVX: Fix a bug in WidenMaskArithmetic. 
llvm-svn: 171397
 2013-01-02 17:40:39 +00:00
Nadav Rotem 2a054b4475 On AVX/AVX2 the type v8i1 is legalized to v8i16, which is an XMM sized 
register. In most cases we actually compare or select YMM-sized registers
and mixing the two types creates horrible code. This commit optimizes
some of the transition sequences.

PR14657.

llvm-svn: 171148
 2012-12-27 08:15:45 +00:00