include/asm-m68knommu/unaligned.h

   1 #ifndef __M68K_UNALIGNED_H
   2 #define __M68K_UNALIGNED_H
   3
   4 #include <linux/config.h>
   5
   6 #ifdef CONFIG_COLDFIRE
   7
   8 /* Use memmove here, so gcc does not insert a __builtin_memcpy. */
   9
  10 #define get_unaligned(ptr) \
  11   ({ __typeof__(*(ptr)) __tmp; memmove(&__tmp, (ptr), sizeof(*(ptr))); __tmp; })
  12
  13 #define put_unaligned(val, ptr)                         \
  14   ({ __typeof__(*(ptr)) __tmp = (val);                  \
  15      memmove((ptr), &__tmp, sizeof(*(ptr)));            \
  16      (void)0; })
  17
  18 #else
  19 /*
  20  * The m68k can do unaligned accesses itself.
  21  *
  22  * The strange macros are there to make sure these can't
  23  * be misused in a way that makes them not work on other
  24  * architectures where unaligned accesses aren't as simple.
  25  */
  26
  27 #define get_unaligned(ptr) (*(ptr))
  28 #define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
  29
  30 #endif
  31
  32 #endif