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From: "aurelien at aurel32 dot net" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug string/29611] Optimized AVX2 string functions unconditionally
 use BMI2 instructions
Date: Mon, 26 Sep 2022 05:18:49 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29611

--- Comment #4 from Aurelien Jarno <aurelien at aurel32 dot net> ---
(In reply to Noah Goldstein from comment #2)
> This was fixed by:
>=20
> commit 83c5b368226c34a2f0a5287df40fc290b2b34359
> Author: H.J. Lu <hjl.tools@gmail.com>
> Date:   Mon Apr 19 10:45:07 2021 -0700
>=20
>     x86-64: Require BMI2 for strchr-avx2.S
>=20
> Which we can probably backport easily. The issue is that some avx2 changes
> where backported without the surrounding ifunc code.
>=20
>=20
>=20
>=20
> Note: This will also be an issue for memchr-avx2.S

According to the bug report in Debian, there is also memchr-avx2.S and
strlen-avx2.S.

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