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3e6a2e37 | 1 | /* Copyright (C) 2012-2014 Free Software Foundation, Inc. |
48310492 RH |
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) | |
30 | UTYPE | |
31 | SIZE(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" |