[PATCH] D47822: [X86][SSE] Support v8i16/v16i16 rotations

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: andreadb, spatel, craig.topper, efriedma.

Extension to https://reviews.llvm.org/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.


Repository:
  rL LLVM

https://reviews.llvm.org/D47822

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/vector-rotate-128.ll
  test/CodeGen/X86/vector-rotate-256.ll
  test/CodeGen/X86/vector-rotate-512.ll

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