[PATCH] D36840: [DAG] convert vector select-of-constants to logic/math

via llvm-commits llvm-commits at lists.llvm.org
Thu Aug 17 12:30:51 PDT 2017


> On Aug 17, 2017, at 11:46 AM, Sanjay Patel via Phabricator via llvm-commits <llvm-commits at lists.llvm.org> wrote:
> 
> 
> For x86, blendv* is always a multi-uop / multi-cycle instruction according to Agner's docs

Are you sure?

Bulldozer, Piledriver, Ryzen, and Skylake seem to list PBLENDVB and BLENDVPS as 1 uop.

—escha
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