[PATCH] libstdc++: Remove unused config/cpu/i486/atomicity.h file

[Uros Bizjak]

On Wed, Oct 8, 2025 at 4:35 PM Jonathan Wakely <jwakely@redhat.com> wrote:
>
> This file is no longer used, because we always use the definitions in
> config/cpu/generic/atomicity_builtins/atomicity.h now.
>
> libstdc++-v3/ChangeLog:
>
>         * config/cpu/i486/atomicity.h: Removed.

OK.

Thanks,
Uros.

> ---
>
> Tested x86_64-linux.
>
>  libstdc++-v3/config/cpu/i486/atomicity.h | 52 ------------------------
>  1 file changed, 52 deletions(-)
>  delete mode 100644 libstdc++-v3/config/cpu/i486/atomicity.h
>
> diff --git a/libstdc++-v3/config/cpu/i486/atomicity.h b/libstdc++-v3/config/cpu/i486/atomicity.h
> deleted file mode 100644
> index 092ea9d1e892..000000000000
> --- a/libstdc++-v3/config/cpu/i486/atomicity.h
> +++ /dev/null
> @@ -1,52 +0,0 @@
> -// Low-level functions for atomic operations: x86, x >= 4 version  -*- C++ -*-
> -
> -// Copyright (C) 1999-2025 Free Software Foundation, Inc.
> -//
> -// This file is part of the GNU ISO C++ Library.  This library is free
> -// software; you can redistribute it and/or modify it under the
> -// terms of the GNU General Public License as published by the
> -// Free Software Foundation; either version 3, or (at your option)
> -// any later version.
> -
> -// This 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 General Public License for more details.
> -
> -// Under Section 7 of GPL version 3, you are granted additional
> -// permissions described in the GCC Runtime Library Exception, version
> -// 3.1, as published by the Free Software Foundation.
> -
> -// You should have received a copy of the GNU General Public License and
> -// a copy of the GCC Runtime Library Exception along with this program;
> -// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
> -// <http://www.gnu.org/licenses/>.
> -
> -#include <ext/atomicity.h>
> -
> -namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
> -{
> -_GLIBCXX_BEGIN_NAMESPACE_VERSION
> -
> -  _Atomic_word
> -  __attribute__ ((__unused__))
> -  __exchange_and_add(volatile _Atomic_word* __mem, int __val) throw ()
> -  {
> -    register _Atomic_word __result;
> -    __asm__ __volatile__ ("lock; xadd{l} {%0,%1|%1,%0}"
> -                         : "=r" (__result), "=m" (*__mem)
> -                         : "0" (__val), "m" (*__mem));
> -    return __result;
> -  }
> -
> -  void
> -  __attribute__ ((__unused__))
> -  __atomic_add(volatile _Atomic_word* __mem, int __val) throw ()
> -  {
> -    __asm__ __volatile__ ("lock; add{l} {%1,%0|%0,%1}"
> -                         : "=m" (*__mem) : "ir" (__val), "m" (*__mem));
> -  }
> -
> -_GLIBCXX_END_NAMESPACE_VERSION
> -} // namespace
> -
> --
> 2.51.0
>