commit 1b888f2e9ad90c85be918a47fa5931fefdd8e738
author David Barker <david.barker@argondesign.com> Mon Jan 16 09:40:09 2017 +0000
committer Debargha Mukherjee <debargha@google.com> Thu Jan 19 16:55:52 2017 +0000
tree d12723fb6ac72b7e8c826507fcbaf4228ef9df6d
parent 0b04e9b8b104e07f9c89d94bc7e1c3393fccb941

Optimize SSE2 warp filter

Improve the speed of the warp filter itself by ~30%. This leads
to an overall decoder speedup of 5-20%, depending on bitrate,
for the global-motion experiment, and a small speedup for
warped-motion.

Applies a very minor change to the rounding during filter
selection (ROUND_POWER_OF_TWO makes slightly more sense here
than ROUND_POWER_OF_TWO_SIGNED, and is faster)

Change-Id: I3f364221d1ec35a8aac0d2c8b0e427f527d12e43