commit 05764d2f77892217ddead7f62586c1a3f5c02d36
author commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> Fri Apr 25 07:41:18 2014 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> Fri Apr 25 07:41:18 2014 +0000
tree 76bd2200ceefbe6c9ac6bf7a5031beae8d8c8cda
parent f66967243c3732523c2035f7d6dbf65c2d20b264

Xfermode: SSE2 implementation of difference_modeproc

With SSE2 optimization, performance of Xfermode_Difference will improve
about 60% on desktop i7-3770. Here are the data:
before:
Xfermode_Difference   8888:  cmsecs =  51.10   565:  cmsecs =  66.39
after:
Xfermode_Difference   8888:  cmsecs =  21.10   565:  cmsecs =  29.33

BUG=skia:
R=mtklein@google.com

Author: qiankun.miao@intel.com

Review URL: https://codereview.chromium.org/234433003

git-svn-id: http://skia.googlecode.com/svn/trunk@14375 2bbb7eff-a529-9590-31e7-b0007b416f81