[Ffmpeg-devel] [PATCH] Little optimization to fft_sse.c

Guillaume POIRIER poirierg
Sun Mar 5 21:05:43 CET 2006


Hi,

On 3/5/06, Zuxy Meng <zuxy.meng at gmail.com> wrote:
> Hi,
>
> This patch uses xorps instead of mulps to toggle the sign of a float,
> as suggested by Software Optimization Guide for AMD64 Processors.

Did you benchmark the speed difference with the hardware counters?

Guillaume
--
Reinventing the wheel certainly is annoying, but as long as all other
wheels are square...

Reimar D?ffinger





More information about the ffmpeg-devel mailing list