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From: Sunil Pandey <skpgkp2@gmail.com>
Date: Wed, 27 Apr 2022 16:48:04 -0700
Message-ID: <CAMAf5_dEQr-oN_KdByxNiYv7UqzfaCraSFh_n05TGaQGgH2E2w@mail.gmail.com>
Subject: Re: [PATCH] x86-64: Require BMI2 for strchr-avx2.S
To: Florian Weimer <fweimer@redhat.com>, libc-stable@sourceware.org
Cc: "H.J. Lu via Libc-alpha" <libc-alpha@sourceware.org>
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On Mon, Apr 19, 2021 at 11:50 AM Florian Weimer via Libc-alpha
<libc-alpha@sourceware.org> wrote:
>
> * H. J. Lu via Libc-alpha:
>
> > Since strchr-avx2.S updated by
> >
> > commit 1f745ecc2109890886b161d4791e1406fdfc29b8
> > Author: noah <goldstein.w.n@gmail.com>
> > Date:   Wed Feb 3 00:38:59 2021 -0500
> >
> >     x86-64: Refactor and improve performance of strchr-avx2.S
> >
> > uses sarx:
> >
> > c4 e2 72 f7 c0        sarx   %ecx,%eax,%eax
> >
> > for strchr-avx2 family functions, require BMI2 in ifunc-impl-list.c and
> > ifunc-avx2.h.
>
> Seems reasonable, thanks.
>
> Florian
>

I would like to backport this patch to release branches.
Any comments or objections?

--Sunil