5-10% faster or more on Phenom, Athlon 64, and some others.
Helps some on pre-SSSE3 Intel chips as well, but not as much.
Originally committed as revision 24513 to svn://svn.ffmpeg.org/ffmpeg/trunk
mbedge loopfilter functions, by re-using space that holds a variable
that we no longer need.
Originally committed as revision 24510 to svn://svn.ffmpeg.org/ffmpeg/trunk
future new optimizations (imagine a sse5) much easier. Also fix a bug where
we used the direction (%2) rather than optimization (%1) to enable this, which
means it wasn't ever actually used...
Originally committed as revision 24507 to svn://svn.ffmpeg.org/ffmpeg/trunk
splits it into small optimization-specific macros which are selected for each
DSP function. The advantage of this approach is that the sse4 functions now
use the ssse3 codepath also without needing an explicit sse4 codepath.
Originally committed as revision 24487 to svn://svn.ffmpeg.org/ffmpeg/trunk
This is a lot more reliable to get cmov rather than trying to trick gcc into
generating it, useful since it's 2% faster overall.
Patch by Eli Friedman <eli.friedman at gmail>
Originally committed as revision 24471 to svn://svn.ffmpeg.org/ffmpeg/trunk
Take shortcuts based on statistically common situations.
Add 4-at-a-time idct_dc function (mmx and sse2) since rows of 4 DC-only DCT
blocks are common.
TODO: tie this more directly into the MB mode, since the DC-level transform is
only used for non-splitmv blocks?
Originally committed as revision 24452 to svn://svn.ffmpeg.org/ffmpeg/trunk
SSSE3 versions, improve SSE2 versions a bit.
SSE2/SSSE3 mbedge h functions are currently broken, so explicitly disable them.
Originally committed as revision 24403 to svn://svn.ffmpeg.org/ffmpeg/trunk
Avoid pextrw, since it's slow on many older CPUs.
Now it doesn't require mmxext either.
Originally committed as revision 24397 to svn://svn.ffmpeg.org/ffmpeg/trunk
Should fix compilation with icc and should help prevent any future duplicates
Originally committed as revision 24380 to svn://svn.ffmpeg.org/ffmpeg/trunk
regular MMX code. Examples of this are the Core1 CPU. Instead, set a new flag,
FF_MM_SSE2/3SLOW, which can be checked for particular SSE2/3 functions that
have been checked specifically on such CPUs and are actually faster than
their MMX counterparts.
In addition, use this flag to enable particular VP8 and LPC SSE2 functions
that are faster than their MMX counterparts.
Based on a patch by Loren Merritt <lorenm AT u washington edu>.
Originally committed as revision 24340 to svn://svn.ffmpeg.org/ffmpeg/trunk
so that it does both U and V planes at the same time. This will have speed
advantages when using SSE2 (or higher) optimizations, since we can do both
the U and V rows together in a single xmm register.
This also renames filter16 to filter16y and filter8 to filter8uv so that it's
more obvious what each function is used for.
Originally committed as revision 24337 to svn://svn.ffmpeg.org/ffmpeg/trunk
inner loopfilter, and it also allows us to save one register on x86-64/sse2.
Originally committed as revision 24269 to svn://svn.ffmpeg.org/ffmpeg/trunk
Also make some small changes to saturation order of 4-tap SSSE3 MC to fix a
non-bitexactness bug.
Patch mostly by Eli Friedman <eli.friedman AT gmail DOT com>.
Originally committed as revision 23965 to svn://svn.ffmpeg.org/ffmpeg/trunk
Whose idea was it to have a CPU that didn't SIGILL on an invalid instruction?
Originally committed as revision 23927 to svn://svn.ffmpeg.org/ffmpeg/trunk
Vitor Sessak
Ronald S. Bultje
Jason Garrett-Glaser
Eli Friedman
Loren Merritt
David Conrad
Måns Rullgård