This is the mail archive of the libstdc++@gcc.gnu.org mailing list for the libstdc++ project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

[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

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]