ARM Skia NEON patches - 32 - Xfermode: 1-pixel NEON modeprocs

In some cases, it's easy to provide a NEON version of the 1-pixel modeprocs.
Combined with https://codereview.chromium.org/23724013/ (merged) it allows
up to 35% speed improvement on Xfermodes when aa is non-NULL.

Signed-off-by: Kévin PETIT <kevin.petit@arm.com>

BUG=
R=djsollen@google.com, reed@google.com, mtklein@google.com, luisjoseromeroesclusa@hotmail.com

Author: kevin.petit.arm@gmail.com

Review URL: https://codereview.chromium.org/104883004

git-svn-id: http://skia.googlecode.com/svn/trunk@12525 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed