?? atomicity.h
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// Low-level functions for atomic operations: CRIS version -*- C++ -*-// Copyright (C) 2001 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 2, 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.// You should have received a copy of the GNU General Public License along// with this library; see the file COPYING. If not, write to the Free// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,// USA.// As a special exception, you may use this file as part of a free software// library without restriction. Specifically, if other files instantiate// templates or use macros or inline functions from this file, or you compile// this file and link it with other files to produce an executable, this// file does not by itself cause the resulting executable to be covered by// the GNU General Public License. This exception does not however// invalidate any other reasons why the executable file might be covered by// the GNU General Public License.#ifndef _BITS_ATOMICITY_H#define _BITS_ATOMICITY_H 1// This entity must not cross a page boundary.typedef int _Atomic_word __attribute__ ((__aligned__ (4)));static inline _Atomic_word__attribute__ ((__unused__))__exchange_and_add (_Atomic_word* __mem, int __val){ int __tmp; _Atomic_word __result;#if (__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), "=m" (*__mem), "=&r" (__tmp) : "r" (__mem), "g" (__val), "m" (*__mem) : "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), "=m" (*__mem), "=&r" (__tmp) : "r" (__mem), "g" (__val), "m" (*__mem) : "memory", "r9");#endif return __result;}static inline void__attribute__ ((__unused__))__atomic_add (_Atomic_word* __mem, int __val){ __exchange_and_add (__mem, __val);}#endif /* atomicity.h */
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