include/asm-xtensa/unaligned.h

   1 /*
   2  * include/asm-xtensa/unaligned.h
   3  *
   4  * Xtensa doesn't handle unaligned accesses efficiently.
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  *
  10  * Copyright (C) 2001 - 2005 Tensilica Inc.
  11  */
  12
  13 #ifndef _XTENSA_UNALIGNED_H
  14 #define _XTENSA_UNALIGNED_H
  15
  16 #include <linux/string.h>
  17
  18 /* Use memmove here, so gcc does not insert a __builtin_memcpy. */
  19
  20 #define get_unaligned(ptr) \
  21   ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
  22
  23 #define put_unaligned(val, ptr)                         \
  24   ({ __typeof__(*(ptr)) __tmp = (val);                  \
  25      memmove((ptr), &__tmp, sizeof(*(ptr)));            \
  26      (void)0; })
  27
  28 #endif  /* _XTENSA_UNALIGNED_H */