[FFmpeg-devel] [PATCH] x86/dsputil: implement 3DNow version of vector_clipf

Ronald S. Bultje rsbultje at gmail.com
Wed May 28 14:57:21 CEST 2014


On Wed, May 28, 2014 at 4:59 AM, Christophe Gisquet <
christophe.gisquet at gmail.com> wrote:

> 2014-05-27 21:08 GMT+02:00 James Almer <jamrial at gmail.com>:
> >> Maybe do twice at a time so you can do some pairing (which might help
> with
> >> performance)?
> >
> > I didn't bench, but wouldn't out-of-order execution deal with this
> anyway?
> Maybe, but k6's oooe is weaker than what we are used to nowadays, and
> I would expect manual pairing/dual issuing to help.
> On the other hand, it's for 15+yo CPUs, but with that logic, we should
> remove all of 3dnow.

As long as all this is under ARCH_X86_32 (it is in this patch), I don't
mind. I mean, people still actively develop mod decoders, that stuff is
even older.


More information about the ffmpeg-devel mailing list