[FFmpeg-devel] [PATCH] PPC64: Add versions of functions in libswscale/input.c optimized for POWER8 VSX SIMD.
michael at niedermayer.cc
Thu Jul 7 14:38:37 EEST 2016
On Thu, Jul 07, 2016 at 07:14:43AM -0400, Ronald S. Bultje wrote:
> On Thu, Jul 7, 2016 at 7:07 AM, Michael Niedermayer <michael at niedermayer.cc>
> > On Wed, Jul 06, 2016 at 07:28:27AM -0500, Dan Parrot wrote:
> > > On Wed, 2016-07-06 at 09:07 +0200, Hendrik Leppkes wrote:
> > [...]
> > >
> > > One other thing: why didn't this come up when the earlier patch was
> > > submitted and applied?
> > community patch review is not a reproduceable process, depending on
> > who has time and does the review, different things can be found and
> > pointed out, and people have also different oppinions.
> > Real consistency can possibly only be achived by having an active
> > maintainer that does all review ...
> > To be more precisse the other patch was applied due to this comment
> > IIRC:
> > "If this patch works (FATE passes on ppc64) and is faster than
> > the plain c functions then it can be committed as is"
> How much faster was it?
There where several benchmarks posted, one is here:
it also contains some arguments why the speedup is less than on x86
> And how does that compare to typical sse2 x86
> speedups vs. c?
> ffmpeg-devel mailing list
> ffmpeg-devel at ffmpeg.org
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
Modern terrorism, a quick summary: Need oil, start war with country that
has oil, kill hundread thousand in war. Let country fall into chaos,
be surprised about raise of fundamantalists. Drop more bombs, kill more
people, be surprised about them taking revenge and drop even more bombs
and strip your own citizens of their rights and freedoms. to be continued
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 181 bytes
Desc: Digital signature
More information about the ffmpeg-devel