[PATCH] D34160: [Power9] Exploit vinserth instruction
Graham Yiu via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Jun 15 08:41:12 PDT 2017
gyiu added a comment.
In https://reviews.llvm.org/D34160#779972, @inouehrs wrote:
> This patch (potentially) increase the number of vector instructions (permutation -> shift + insert). Is my understanding correct?
Yep. Though I think with a vperm you still need to load the mask into a vector register first, whereas with vshift + vinsert we're saving on the load.
Repository:
rL LLVM
https://reviews.llvm.org/D34160
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