Implement SSE2 version of loadAlphaData http://codereview.appspot.com/6050054/ Signed-off-by: Nicolas Capens Signed-off-by: Daniel Koch Authored-by: Jin Yang With this patch, my HTML5 2D canvas benchmark with Chromium on Windows7 with GPU acceleration can boost about 4% though the most execution time is in GPU. git-svn-id: https://angleproject.googlecode.com/svn/trunk@1067 736b8ea6-26fd-11df-bfd4-992fa37f6226