1117397Skan// Low-level functions for atomic operations: CRIS version -*- C++ -*- 2117397Skan 3169691Skan// Copyright (C) 2001, 2003, 2004, 2005 Free Software Foundation, Inc. 4117397Skan// 5117397Skan// This file is part of the GNU ISO C++ Library. This library is free 6117397Skan// software; you can redistribute it and/or modify it under the 7117397Skan// terms of the GNU General Public License as published by the 8117397Skan// Free Software Foundation; either version 2, or (at your option) 9117397Skan// any later version. 10117397Skan 11117397Skan// This library is distributed in the hope that it will be useful, 12117397Skan// but WITHOUT ANY WARRANTY; without even the implied warranty of 13117397Skan// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14117397Skan// GNU General Public License for more details. 15117397Skan 16117397Skan// You should have received a copy of the GNU General Public License along 17117397Skan// with this library; see the file COPYING. If not, write to the Free 18169691Skan// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19117397Skan// USA. 20117397Skan 21117397Skan// As a special exception, you may use this file as part of a free software 22117397Skan// library without restriction. Specifically, if other files instantiate 23117397Skan// templates or use macros or inline functions from this file, or you compile 24117397Skan// this file and link it with other files to produce an executable, this 25117397Skan// file does not by itself cause the resulting executable to be covered by 26117397Skan// the GNU General Public License. This exception does not however 27117397Skan// invalidate any other reasons why the executable file might be covered by 28117397Skan// the GNU General Public License. 29117397Skan 30169691Skan#include <ext/atomicity.h> 31117397Skan 32169691Skan_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) 33169691Skan 34132720Skan _Atomic_word 35132720Skan __exchange_and_add(volatile _Atomic_word* __mem, int __val) 36132720Skan { 37132720Skan int __tmp; 38132720Skan _Atomic_word __result; 39117397Skan 40117397Skan#if (__CRIS_arch_version >= 10) 41132720Skan __asm__ __volatile__ (" clearf \n" 42117397Skan "0: \n" 43117397Skan " move.d %4,%2 \n" 44117397Skan " move.d [%3],%0 \n" 45117397Skan " add.d %0,%2 \n" 46117397Skan " ax \n" 47117397Skan " move.d %2,[%3] \n" 48117397Skan " bwf 0b \n" 49117397Skan " clearf \n" 50169691Skan : "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp) 51169691Skan : "r" (__mem), "g" (__val), "Q" (*__mem) 52132720Skan /* The memory clobber must stay, regardless of 53132720Skan current uses of this function. */ 54117397Skan : "memory"); 55117397Skan#else 56132720Skan __asm__ __volatile__ (" move $ccr,$r9 \n" 57117397Skan " di \n" 58117397Skan " move.d %4,%2 \n" 59117397Skan " move.d [%3],%0 \n" 60117397Skan " add.d %0,%2 \n" 61117397Skan " move.d %2,[%3] \n" 62117397Skan " move $r9,$ccr \n" 63169691Skan : "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp) 64169691Skan : "r" (__mem), "g" (__val), "Q" (*__mem) 65132720Skan : "r9", 66132720Skan /* The memory clobber must stay, regardless of 67132720Skan current uses of this function. */ 68132720Skan "memory"); 69117397Skan#endif 70117397Skan 71132720Skan return __result; 72132720Skan } 73117397Skan 74132720Skan void 75132720Skan __atomic_add(volatile _Atomic_word* __mem, int __val) 76132720Skan { __exchange_and_add(__mem, __val); } 77169691Skan 78169691Skan_GLIBCXX_END_NAMESPACE 79