From: Kieran Kunhya <kierank@obe.tv>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH 2/3] swscale/x86/yuv2yuvX: Add yuv2yuvX avx512
Date: Fri, 14 Jul 2023 15:57:10 +0100
Message-ID: <CAK+ULv4X+vtr_MEzHuVKiQa=8a4J+xYskRjNWkdqv2fANZBp9g@mail.gmail.com> (raw)
In-Reply-To: <b536b6bd-f5de-0aff-fc2b-4d4d2654f954@gmail.com>
On Fri, 14 Jul 2023 at 14:03, James Almer <jamrial@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
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next prev parent reply other threads:[~2023-07-14 14:57 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-14 10:08 Alan Kelly
2023-07-14 12:59 ` Kieran Kunhya
2023-07-14 13:03 ` James Almer
2023-07-14 14:57 ` Kieran Kunhya [this message]
2023-07-14 14:59 ` James Almer
2023-07-17 9:23 ` Alan Kelly
2023-07-17 9:23 ` Alan Kelly
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