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4 Commits

Author SHA1 Message Date
Nadav Rotem
ba95865441 On Sandybridge split unaligned 256bit stores into two xmm-sized stores. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172894 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-01-19 08:38:41 +00:00
Nadav Rotem
48177ac90f On Sandybridge loading unaligned 256bits using two XMM loads (vmovups and vinsertf128) is faster than using a single vmovups instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172868 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-01-18 23:10:30 +00:00
Nadav Rotem
d570f59048 AVX: Fix a bug in WidenMaskArithmetic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171397 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-01-02 17:40:39 +00:00
Nadav Rotem
d6fb53adb1 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171148 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-12-27 08:15:45 +00:00