| commit | 4db2076594be3a48c6c1b3755c1d9621f5ad1c5b | [log] [tgz] |
|---|---|---|
| author | Yunqing Wang <yunqingwang@google.com> | Mon Oct 18 14:15:15 2010 -0400 |
| committer | Yunqing Wang <yunqingwang@google.com> | Mon Oct 18 14:15:15 2010 -0400 |
| tree | 831bdf348995694e320a7520f6f5a4804a37f964 | |
| parent | a2b598a2f964b0d7a1e5df74b66c70a1bca746ca [diff] |
Add SSE2 subtract functions Instead of doing 8-bit data unpack and 16-bit subtraction, use psubb to do 16 8-bit subtractions and pcmpgtb to preserve the sign information. This does not bring noticable gain since these functions are not called frequently. Change-Id: I90a0dfaa3db9d422e4ada324076596ffb178548e