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From: Florian Weimer <fweimer@redhat.com>
To: Sunil Pandey <skpgkp2@gmail.com>
Cc: libc-stable@sourceware.org,  "H.J. Lu via Libc-alpha"
 <libc-alpha@sourceware.org>
Subject: Re: [PATCH] x86-64: Require BMI2 for strchr-avx2.S
References: <20210419175136.2495152-1-hjl.tools@gmail.com>
 <874kg22m2a.fsf@oldenburg.str.redhat.com>
 <CAMAf5_dEQr-oN_KdByxNiYv7UqzfaCraSFh_n05TGaQGgH2E2w@mail.gmail.com>
Date: Thu, 28 Apr 2022 12:19:42 +0200
In-Reply-To: <CAMAf5_dEQr-oN_KdByxNiYv7UqzfaCraSFh_n05TGaQGgH2E2w@mail.gmail.com>
 (Sunil Pandey's message of "Wed, 27 Apr 2022 16:48:04 -0700")
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* Sunil Pandey:

> 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?

Please backport.

Thanks,
Florian