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// Low-level functions for atomic operations: CRIS version -*- C++ -*-
// Copyright (C) 2001, 2003, 2004, 2005, 2009 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
__exchange_and_add(volatile _Atomic_word* __mem, int __val) throw ()
{
int __tmp;
_Atomic_word __result;
#if (__CRIS_arch_version >= 32)
__asm__ __volatile__ (" clearf p \n"
"0: \n"
" move.d %4,%2 \n"
" move.d [%3],%0 \n"
" add.d %0,%2 \n"
" ax \n"
" move.d %2,[%3] \n"
" bcs 0b \n"
" clearf p \n"
: "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
: "r" (__mem), "g" (__val), "Q" (*__mem)
: "memory");
#elif (__CRIS_arch_version >= 10)
__asm__ __volatile__ (" clearf \n"
"0: \n"
" move.d %4,%2 \n"
" move.d [%3],%0 \n"
" add.d %0,%2 \n"
" ax \n"
" move.d %2,[%3] \n"
" bwf 0b \n"
" clearf \n"
: "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
: "r" (__mem), "g" (__val), "Q" (*__mem)
/* The memory clobber must stay, regardless of
current uses of this function. */
: "memory");
#else
__asm__ __volatile__ (" move $ccr,$r9 \n"
" di \n"
" move.d %4,%2 \n"
" move.d [%3],%0 \n"
" add.d %0,%2 \n"
" move.d %2,[%3] \n"
" move $r9,$ccr \n"
: "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
: "r" (__mem), "g" (__val), "Q" (*__mem)
: "r9",
/* The memory clobber must stay, regardless of
current uses of this function. */
"memory");
#endif
return __result;
}
void
__atomic_add(volatile _Atomic_word* __mem, int __val) throw ()
{ __exchange_and_add(__mem, __val); }
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
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