[FFmpeg-devel] [PATCH] vp9: add 16x16 idct avx2 (8-bit).

[Ronald S. Bultje]

Hi,

On Mon, Jul 11, 2016 at 6:15 PM, Henrik Gramner <henrik at gramner.com> wrote:

> On Mon, Jul 11, 2016 at 11:48 PM, Carl Eugen Hoyos <cehoyos at ag.or.at>
> wrote:
> > Ronald S. Bultje <rsbultje <at> gmail.com> writes:
> >
> >> +%if ARCH_X86_64
> >
> > Just curious: Why does this not work on x86-32?
> > Isn't there some asm magic that moves some
> > parameters to the stack if necessary?
> >
> > Carl Eugen
>
> Uses more than 8 vector registers.


So, to be more precise, yes it can be made to work, and x86inc.asm does
help a bit here and there to make this easier, but it's still quite a bit
of work so we don't always make that effort anymore.

Ronald