blob: d456bc41a1cede98fc12e2371fec6abce3f184f7 [file] [log] [blame]
/* Copyright (C) 2012-2017 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@redhat.com>.
This file is part of the GNU Atomic Library (libatomic).
Libatomic 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 3 of the License, or
(at your option) any later version.
Libatomic 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libatomic_i.h"
/* If we use the builtin we'll get __sync_synchronize, not __kernel_dmb. */
#if !DONE && N <= WORDSIZE && !defined(HAVE_DMB) && !defined(HAVE_DMB_MCR)
UTYPE
SIZE(libat_load) (UTYPE *mptr, int smodel)
{
UTYPE ret;
if (maybe_specialcase_relaxed(smodel))
ret = *mptr;
else
{
__kernel_dmb ();
ret = *mptr;
__kernel_dmb ();
}
return ret;
}
#define DONE 1
#endif /* !HAVE_DMB */
#include "../../../load_n.c"