mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-04 16:50:57 +00:00
90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
// Low-level functions for atomic operations: CRIS version -*- C++ -*-
|
|
|
|
// Copyright (C) 2001-2016 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
|