commit 50a164a1f6eb7b32d34b0e9fc40f5f6067fdfb57
author Yi Luo <luoyi@google.com> Tue Mar 08 14:10:24 2016 -0800
committer Yi Luo <luoyi@google.com> Tue Mar 08 14:56:38 2016 -0800
tree 6dc4c7687d4fccc2b88a7af79bee5bf931fbb44e
parent cf9c95c32c5cda206a018bfad1321c7e9ac7f623

Implemented DST 16x16 SSE2 intrinsics optimization

- Implemented fdst16_sse2(), fdst16_8col() against C version: fdst16().
- Turned on 7 DST related hybrid txfm types in vp10_fht16x16_sse2().
- Replaced vp10_fht10x10_c() with vp10_fht16x16_sse2() in
  fwd_txfm_16x16().
- Added vp10_fht16x16_sse2() unit test against C version:
  vp10_fht16x16_c() (--gtest_filter=*VP10Trans16x16*).
- Unit test passed.
- Speed improvement: 2.4%, 3.2%, 3.2%, for city_cif.y4m, garden_sif.y4m,
  and mobile_cif.y4m.

Change-Id: Ib30a67ce5d5964bef143d588d0f8fa438be8901f