1 // Low-level functions for atomic operations: CRIS version -*- C++ -*- 2 3 // Copyright (C) 2001-2013 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 #include <ext/atomicity.h> 26 27 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 28 { 29 _GLIBCXX_BEGIN_NAMESPACE_VERSION 30 31 _Atomic_word 32 __exchange_and_add(volatile _Atomic_word* __mem, int __val) throw () 33 { 34 int __tmp; 35 _Atomic_word __result; 36 37 #if (__CRIS_arch_version >= 32) 38 __asm__ __volatile__ (" clearf p \n" 39 "0: \n" 40 " move.d %4,%2 \n" 41 " move.d [%3],%0 \n" 42 " add.d %0,%2 \n" 43 " ax \n" 44 " move.d %2,[%3] \n" 45 " bcs 0b \n" 46 " clearf p \n" 47 : "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp) 48 : "r" (__mem), "g" (__val), "Q" (*__mem) 49 : "memory"); 50 #elif (__CRIS_arch_version >= 10) 51 __asm__ __volatile__ (" clearf \n" 52 "0: \n" 53 " move.d %4,%2 \n" 54 " move.d [%3],%0 \n" 55 " add.d %0,%2 \n" 56 " ax \n" 57 " move.d %2,[%3] \n" 58 " bwf 0b \n" 59 " clearf \n" 60 : "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp) 61 : "r" (__mem), "g" (__val), "Q" (*__mem) 62 /* The memory clobber must stay, regardless of 63 current uses of this function. */ 64 : "memory"); 65 #else 66 __asm__ __volatile__ (" move $ccr,$r9 \n" 67 " di \n" 68 " move.d %4,%2 \n" 69 " move.d [%3],%0 \n" 70 " add.d %0,%2 \n" 71 " move.d %2,[%3] \n" 72 " move $r9,$ccr \n" 73 : "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp) 74 : "r" (__mem), "g" (__val), "Q" (*__mem) 75 : "r9", 76 /* The memory clobber must stay, regardless of 77 current uses of this function. */ 78 "memory"); 79 #endif 80 81 return __result; 82 } 83 84 void 85 __atomic_add(volatile _Atomic_word* __mem, int __val) throw () 86 { __exchange_and_add(__mem, __val); } 87 88 _GLIBCXX_END_NAMESPACE_VERSION 89 } // namespace 90