[FFmpeg-devel] [PATCH] VP8 V simple loopfilter in MMX/MMX2/SSE2

[Jason Garrett-Glaser]

On Thu, Jul 1, 2010 at 7:32 AM, Ronald S. Bultje <rsbultje at gmail.com> wrote:
> Hi,
>
> see attached, my first try at doing a loopfilter in SIMD.
>
> C takes about 660 cycles for the main MB one of 1760 for the 3
> together in the splitmv case. MMX didn't really measure since it's
> only 1 instruction difference as per MMX2 (I just tested that they
> gave identical output). MMX2 takes 190/350 cycles, SSE2 takes 180/330
> cycles (which is weird, should be faster, but who knows what my crappy
> CPU is doing, this machine is 5 yrs old - Intel Core Duo 2GHz on a
> MacBook Pro).

As I already told you multiple times, the Core Duo's SSE unit is so
slow that it might as well not exist.

Dark Shikari