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[Patch][libstdc++-v3] Remove MIPS specific atomicity.h
- From: David Daney <ddaney at avtrex dot com>
- To: libstdc++ at gcc dot gnu dot org
- Cc: gcc-patches <gcc-patches at gcc dot gnu dot org>, Richard Sandiford <rdsandiford at googlemail dot com>
- Date: Tue, 13 May 2008 09:37:56 -0700
- Subject: [Patch][libstdc++-v3] Remove MIPS specific atomicity.h
In GCC 4.3 we added support for the standard atomic memory builtins to
the mips target. This lets us use the generic code in libstdc++ instead
of the custom asm implementation in config/cpu/mips/atomicity.h
This patch removes config/cpu/mips/atomicity.h, and the config/cpu/mips
directory which is now empty. The mips specific host code in
configure.host is also removed as it doesn't do anything without
config/cpu/mips/atomicity.h being present.
Bootstrapped and tested on mipsel-linux with no regressions (and zero
FAILs in libstdc++).
OK to commit?
2008-05-13 David Daney <ddaney@avtrex.com>
* config/cpu/mips/atomicity.h: Remove file.
* config/cpu/mips: Remove directory.
* configure.host: Remove host specific handling for mips*-*-*.
Index: configure.host
===================================================================
--- configure.host (revision 135221)
+++ configure.host (working copy)
@@ -321,15 +321,6 @@
fi
esac
;;
- mips*-*-*)
- case "${host_os}" in
- gnu* | linux* | irix*)
- ;;
- *)
- atomicity_dir="cpu/generic"
- ;;
- esac
- ;;
powerpc*-*-darwin*)
port_specific_symbol_files="\$(srcdir)/../config/os/bsd/darwin/ppc-extra.ver"
;;
Index: config/cpu/mips/atomicity.h
===================================================================
--- config/cpu/mips/atomicity.h (revision 135221)
+++ config/cpu/mips/atomicity.h (working copy)
@@ -1,86 +0,0 @@
-// Low-level functions for atomic operations: MIPS version -*- C++ -*-
-
-// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
-// 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 2, 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.
-
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING. If not, write to the Free
-// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
-// USA.
-
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
-
-#include <ext/atomicity.h>
-
-_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
-
- // NB: MIPS II or above required.
- _Atomic_word
- __attribute__ ((__unused__))
- __exchange_and_add(volatile _Atomic_word* __mem, int __val)
- {
- _Atomic_word __result, __tmp;
-
- __asm__ __volatile__
- ("/* Inline exchange & add */\n\t"
- "1:\n\t"
- ".set push\n\t"
-#if _MIPS_SIM == _ABIO32
- ".set mips2\n\t"
-#endif
- "ll %0,0(%2)\n\t"
- "addu %1,%3,%0\n\t"
- "sc %1,0(%2)\n\t"
- ".set pop\n\t"
- "beqz %1,1b\n\t"
- "/* End exchange & add */"
- : "=&r"(__result), "=&r"(__tmp)
- : "r"(__mem), "r"(__val)
- : "memory" );
-
- return __result;
- }
-
- void
- __attribute__ ((__unused__))
- __atomic_add(volatile _Atomic_word* __mem, int __val)
- {
- _Atomic_word __result;
-
- __asm__ __volatile__
- ("/* Inline atomic add */\n\t"
- "1:\n\t"
- ".set push\n\t"
-#if _MIPS_SIM == _ABIO32
- ".set mips2\n\t"
-#endif
- "ll %0,0(%1)\n\t"
- "addu %0,%2,%0\n\t"
- "sc %0,0(%1)\n\t"
- ".set pop\n\t"
- "beqz %0,1b\n\t"
- "/* End atomic add */"
- : "=&r"(__result)
- : "r"(__mem), "r"(__val)
- : "memory" );
- }
-
-_GLIBCXX_END_NAMESPACE