commit 8121d27b297ce26cf6cd6c665463f49a34d769ba
author Mike Klein <mtklein@google.com> Mon Mar 02 17:26:11 2020 -0600
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Tue Mar 03 00:32:51 2020 +0000
tree e4f9fabaf9baf931ae85af50554c918de08cec60
parent 15902a5b555f7fdf71c5768a1b0411229a932f83

stick to 256-bit ymm on skx

I haven't yet seen it slower, and it ought to avoid the most egregious
downclocking from zmm use.  Still gets to use all the fancy AVX-512 new
instructions, so it does seem to run faster than just targeting AVX2.

Change-Id: I5738bc28c490619e0303813d69e00c8b6d7bb184
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/274592
Auto-Submit: Mike Klein <mtklein@google.com>
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Herb Derby <herb@google.com>