1  /* Copyright (C) 2018-2023 Free Software Foundation, Inc.
       2  
       3     This file is part of the GNU Atomic Library (libatomic).
       4  
       5     Libatomic is free software; you can redistribute it and/or modify it
       6     under the terms of the GNU General Public License as published by
       7     the Free Software Foundation; either version 3 of the License, or
       8     (at your option) any later version.
       9  
      10     Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY
      11     WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
      12     FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
      13     more details.
      14  
      15     Under Section 7 of GPL version 3, you are granted additional
      16     permissions described in the GCC Runtime Library Exception, version
      17     3.1, as published by the Free Software Foundation.
      18  
      19     You should have received a copy of the GNU General Public License and
      20     a copy of the GCC Runtime Library Exception along with this program;
      21     see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      22     <http://www.gnu.org/licenses/>.  */
      23  
      24  #include <libatomic_i.h>
      25  
      26  
      27  /* Analog to config/s390/exch_n.c.  */
      28  
      29  #if !DONE && N == 16
      30  UTYPE
      31  SIZE(libat_load) (UTYPE *mptr, int smodel)
      32  {
      33    if (!((uintptr_t)mptr & 0xf))
      34      {
      35        return __atomic_load_n ((UTYPE *)__builtin_assume_aligned (mptr, 16),
      36  			      __ATOMIC_SEQ_CST);
      37      }
      38    else
      39      {
      40        UTYPE ret;
      41        UWORD magic;
      42  
      43        pre_seq_barrier (smodel);
      44        magic = protect_start (mptr);
      45  
      46        ret = *mptr;
      47  
      48        protect_end (mptr, magic);
      49        post_seq_barrier (smodel);
      50  
      51        return ret;
      52      }
      53  }
      54  #define DONE 1
      55  #endif /* N == 16 */
      56  
      57  #include "../../load_n.c"