[MPlayer-dev-eng] Re: PATCH] SSE2-optimized libmpeg2 motion compensation

[Matthias Wieser]

Am Mittwoch, 14. Juni 2006 13:39 schrieb jserv at linux2.cc.ntu.edu.tw:
> Hello list,
>
>   Recently, I implement SSE2-optimized libmpeg2 motion compensation, and
> I think that it might be useful to MPlayer. I have attached the patch in
> this mail.
>
>   The performance gain over the original MMXext(MMX2)-based motion
> compensation implementation in libmpeg2 is as the following:
>
> MMXext-based
> ============
>       cumulative
>  time   seconds   seconds    calls  ms/call  ms/call  name
>   3.14     61.54     2.59  1826892     0.00     0.01  mpeg2_idct_copy_mmxext
>
> SSE2-based
> ==========
>   2.93     62.22     2.38   112816     0.02     0.02  MC_avg_xy_16_sse2
            ^^^^^^

The sse2 version is slower?

Regards,
  Matthias