1 // Low-level functions for atomic operations: CRIS version -*- C++ -*- 2 3 // Copyright (C) 2001, 2003, 2004, 2005, 2009 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 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) 28 29 _Atomic_word 30 __exchange_and_add(volatile _Atomic_word* __mem, int __val) throw () 31 { 32 int __tmp; 33 _Atomic_word __result; 34 35 #if (__CRIS_arch_version >= 32) 36 __asm__ __volatile__ (" clearf p \n" 37 "0: \n" 38 " move.d %4,%2 \n" 39 " move.d [%3],%0 \n" 40 " add.d %0,%2 \n" 41 " ax \n" 42 " move.d %2,[%3] \n" 43 " bcs 0b \n" 44 " clearf p \n" 45 : "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp) 46 : "r" (__mem), "g" (__val), "Q" (*__mem) 47 : "memory"); 48 #elif (__CRIS_arch_version >= 10) 49 __asm__ __volatile__ (" clearf \n" 50 "0: \n" 51 " move.d %4,%2 \n" 52 " move.d [%3],%0 \n" 53 " add.d %0,%2 \n" 54 " ax \n" 55 " move.d %2,[%3] \n" 56 " bwf 0b \n" 57 " clearf \n" 58 : "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp) 59 : "r" (__mem), "g" (__val), "Q" (*__mem) 60 /* The memory clobber must stay, regardless of 61 current uses of this function. */ 62 : "memory"); 63 #else 64 __asm__ __volatile__ (" move $ccr,$r9 \n" 65 " di \n" 66 " move.d %4,%2 \n" 67 " move.d [%3],%0 \n" 68 " add.d %0,%2 \n" 69 " move.d %2,[%3] \n" 70 " move $r9,$ccr \n" 71 : "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp) 72 : "r" (__mem), "g" (__val), "Q" (*__mem) 73 : "r9", 74 /* The memory clobber must stay, regardless of 75 current uses of this function. */ 76 "memory"); 77 #endif 78 79 return __result; 80 } 81 82 void 83 __atomic_add(volatile _Atomic_word* __mem, int __val) throw () 84 { __exchange_and_add(__mem, __val); } 85 86 _GLIBCXX_END_NAMESPACE 87