| commit | 508ae1b3d592d40ca5327e0e4e68b6f5431513ea | |
| author | Johann <johannkoenig@google.com> | |
| Wed, 13 Apr 2011 20:38:02 +0000 (13 16:38 -0400) | ||
| committer | Johann <johannkoenig@google.com> | |
| Thu, 21 Apr 2011 19:47:55 +0000 (21 15:47 -0400) | ||
| tree | aca4e873458305b1a21fe1832b9c1d523ac90e49 | treesnapshot (tar.gz zip) |
| parent | 7a49accd0b65453057762929efc7eed93deba043 | commitdiff |
keep values in registers during quantization
add an sse4 quantizer so we can use pinsrw/pextrw and keep values in xmm
registers instead of proxying through the stack. and as long as we're
bumping up, use some ssse3 instructions in the EOB detection (see ssse3
fast quantizer)
pick up about a percent on 32bit and about two on 64bit.
Change-Id: If15abba0e8b037a1d231c0edf33501545c9d9363
add an sse4 quantizer so we can use pinsrw/pextrw and keep values in xmm
registers instead of proxying through the stack. and as long as we're
bumping up, use some ssse3 instructions in the EOB detection (see ssse3
fast quantizer)
pick up about a percent on 32bit and about two on 64bit.
Change-Id: If15abba0e8b037a1d231c0edf33501545c9d9363