[FFmpeg-devel] [PATCH 2/3] swscale/x86/yuv2yuvX: Add yuv2yuvX avx512

[Kieran Kunhya]

On Fri, 14 Jul 2023 at 14:03, James Almer <jamrial at gmail.com> wrote:

> On 7/14/2023 9:59 AM, Kieran Kunhya wrote:
> >> +#if ARCH_X86_64 && HAVE_AVX512_EXTERNAL
> >> +        if (EXTERNAL_AVX512(cpu_flags))
> >> +            c->yuv2planeX = yuv2yuvX_avx512;
> >>   #endif
> >>
> >
> >   You want EXTERNAL_AVX512ICL here.
>
> vpermt2q with zmm registers is avx512f and not any of the extensions, so
> that check is fine.
>

We still support Skylake and we don't want downclocking on that platform.
At least that was my understanding of the intention of AVX512 vs AVX512ICL.
It appears I'm the only one following this convention though.

Kieran