tree f154f0f79ba37c33bc654005330a0f150a06aabd
parent d7a5b59b1ef0832429a72f221b9cff4c5e7370a7
author Mike Klein <mtklein@google.com> 1588702811 -0500
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1589205258 +0000

xor to make zero

Just noticed this while digging through skia:10210.

Not super important, but does make programs a little smaller,
and the vpxor reg,reg,reg stands out clearly in disassembly.

Could do the same for all-ones, but I think that's mostly
used from memory directly, by vptest.

Change-Id: I8372f7071a3c951f879d440bbd32640ebdfabf08
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/287858
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Reed <reed@google.com>