1/* Copyright (C) 2012-2015 Free Software Foundation, Inc. 2 Contributed by Richard Henderson <rth@redhat.com>. 3 4 This file is part of the GNU Atomic Library (libatomic). 5 6 Libatomic is free software; you can redistribute it and/or modify it 7 under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 13 FOR A PARTICULAR PURPOSE. See the GNU General Public License for 14 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 "libatomic_i.h" 26 27 28/* If we use the builtin we'll get __sync_synchronize, not __kernel_dmb. */ 29#if !DONE && N <= WORDSIZE && !defined(HAVE_DMB) && !defined(HAVE_DMB_MCR) 30UTYPE 31SIZE(libat_load) (UTYPE *mptr, int smodel) 32{ 33 UTYPE ret; 34 35 if (maybe_specialcase_relaxed(smodel)) 36 ret = *mptr; 37 else 38 { 39 __kernel_dmb (); 40 ret = *mptr; 41 __kernel_dmb (); 42 } 43 return ret; 44} 45 46#define DONE 1 47#endif /* !HAVE_DMB */ 48 49#include "../../../load_n.c" 50