commit a735ba5b795ad4759ef21c4e6b550bbafbd5d9af
author Simon Pilgrim <llvm-dev@redking.me.uk> Fri Jun 08 17:58:42 2018 +0000
committer Simon Pilgrim <llvm-dev@redking.me.uk> Fri Jun 08 17:58:42 2018 +0000
tree 55edf8647054ee58277f2239216da7b2316e4e37
parent 1503b9f6fe8241ce2690ce6681537d725dd0d1a6

[X86][SSE] Support v8i16/v16i16 rotations

Extension to D46954 (PR37426), this patch adds support for v8i16/v16i16 rotations in a similar manner - the conversion of the shift/rotate amount to a multiplication factor and the use of PMULLW to shift left and PMULHUW (ISD::MULHU) to shift the wrapped bits back around to be ORd together.

Differential Revision: https://reviews.llvm.org/D47822

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@334309 91177308-0d34-0410-b5e6-96231b3b80d8