tree 26ef42506e0eaaf03022f4f7fbe15d617beae883
parent a0ae3682aa67f882006c604196f7ee83eff88d84
author Yunqing Wang <yunqingwang@google.com> 1288183524 -0400
committer Yunqing Wang <yunqingwang@google.com> 1288200991 -0400

Full search SAD function optimization in SSE4.1

Use mpsadbw, and calculate 8 sad at once. Function list:
vp8_sad16x16x8_sse4
vp8_sad16x8x8_sse4
vp8_sad8x16x8_sse4
vp8_sad8x8x8_sse4
vp8_sad4x4x8_sse4

(test clip: tulip)
For best quality mode, this gave encoder a 5% performance boost.
For good quality mode with speed=1, this gave encoder a 3%
performance boost.

Change-Id: I083b5a39d39144f88dcbccbef95da6498e490134