commit 977dccd12cce31a318240dbb088e43b3f2648519
author Yi Luo <luoyi@google.com> Tue Mar 15 17:09:38 2016 -0700
committer Yi Luo <luoyi@google.com> Wed Mar 23 09:13:45 2016 -0700
tree 52fca3e00b76e413a87fcc9df02ea3c672e140f5
parent 109ef96a5fb019a13425c4c0b4c631e18f1b3a5a

Highbd fht4x4 SSE4.1 optimization for DCT_DCT mode
- Setup function vp10_highbd_fht4x4_sse4_1 for highbd SSE4.1
  intrinsics optimization.
- Wrote SSE4.1 functions: load_buffer_4x4(), write_buffer_4x4(),
  and fdct4x4_sse4_1().
- Used logic right shift to avoid coeff memory write/read.
- Turned on vp10_highbd_fht4x4_sse4_1 for DCT_DCT mode only.
- Improved overall encoding performance >2.3% for 50 frames
  sequence, park_joy_1080p_12.y4m, in which, --input-bit-depth=12,
  --bit-depth=12, 50 frames.
- Unit test passed.

Change-Id: Idd6dc6e472cbbf235f0ade4f66fbe859a860a004