From: "H.J. Lu" <hjl.tools@gmail.com>
To: Noah Goldstein <goldstein.w.n@gmail.com>
Cc: GNU C Library <libc-alpha@sourceware.org>
Subject: Re: [PATCH v2] x86_64: Add memcmpeq.S to fix disable-multi-arch build
Date: Thu, 28 Oct 2021 14:14:12 -0700 [thread overview]
Message-ID: <CAMe9rOpxUGFTzJhQGS0G5dB52so=ooGozc6uVZtcNgODqFg=sA@mail.gmail.com> (raw)
In-Reply-To: <20211028211026.2430103-1-goldstein.w.n@gmail.com>
On Thu, Oct 28, 2021 at 2:10 PM Noah Goldstein via Libc-alpha
<libc-alpha@sourceware.org> wrote:
>
> The following commit:
>
> commit cf4fd28ea453d1a9cec93939bc88b58ccef5437a
> Author: Noah Goldstein <goldstein.w.n@gmail.com>
> Date: Tue Oct 26 19:43:18 2021 -0500
>
> Broke --disable-multi-arch build for x86_64 because x86_64/memcmpeq.S
> was not defined outside of multiarch and the alias for __memcmpeq in
> x86_64/memcmp.S was removed.
>
> This commit fixes that issue by adding x86_64/memcmpeq.S.
>
> make xcheck passes on x86_64 with and without --disable-multi-arch
> ---
> sysdeps/x86_64/memcmpeq.S | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
> create mode 100644 sysdeps/x86_64/memcmpeq.S
>
> diff --git a/sysdeps/x86_64/memcmpeq.S b/sysdeps/x86_64/memcmpeq.S
> new file mode 100644
> index 0000000000..db1756915d
> --- /dev/null
> +++ b/sysdeps/x86_64/memcmpeq.S
> @@ -0,0 +1,21 @@
> +/* __memcmpeq optimized with SSE2.
> + Copyright (C) 2017-2021 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#define memcmp __memcmpeq
> +#define USE_AS_MEMCMPEQ 1
> +#include "multiarch/memcmp-sse2.S"
> --
> 2.25.1
>
LGTM.
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Thanks.
--
H.J.
next prev parent reply other threads:[~2021-10-28 21:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-28 19:47 [PATCH v1] " Noah Goldstein
2021-10-28 20:19 ` H.J. Lu
2021-10-28 20:22 ` Noah Goldstein
2021-10-28 20:39 ` H.J. Lu
2021-10-28 21:11 ` Noah Goldstein
2021-10-28 21:10 ` [PATCH v2] " Noah Goldstein
2021-10-28 21:14 ` H.J. Lu [this message]
2021-10-28 21:36 ` Noah Goldstein
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