From: Florian Weimer <fweimer@redhat.com>
To: "H.J. Lu via Libc-alpha" <libc-alpha@sourceware.org>
Subject: Re: [PATCH] x86-64: Require BMI2 for strchr-avx2.S
Date: Mon, 19 Apr 2021 19:58:37 +0200 [thread overview]
Message-ID: <874kg22m2a.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <20210419175136.2495152-1-hjl.tools@gmail.com> (H. J. Lu via Libc-alpha's message of "Mon, 19 Apr 2021 10:51:36 -0700")
* 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
next prev parent reply other threads:[~2021-04-19 17:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-19 17:51 H.J. Lu
2021-04-19 17:58 ` Florian Weimer [this message]
2022-04-27 23:48 ` Sunil Pandey
2022-04-28 10:19 ` Florian Weimer
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