arch/m68knommu/lib/memcpy.c

   1
   2 #include <linux/types.h>
   3 #include <linux/autoconf.h>
   4
   5 void * memcpy(void * to, const void * from, size_t n)
   6 {
   7 #ifdef CONFIG_COLDFIRE
   8   void *xto = to;
   9   size_t temp;
  10
  11   if (!n)
  12     return xto;
  13   if ((long) to & 1)
  14     {
  15       char *cto = to;
  16       const char *cfrom = from;
  17       *cto++ = *cfrom++;
  18       to = cto;
  19       from = cfrom;
  20       n--;
  21     }
  22   if (n > 2 && (long) to & 2)
  23     {
  24       short *sto = to;
  25       const short *sfrom = from;
  26       *sto++ = *sfrom++;
  27       to = sto;
  28       from = sfrom;
  29       n -= 2;
  30     }
  31   temp = n >> 2;
  32   if (temp)
  33     {
  34       long *lto = to;
  35       const long *lfrom = from;
  36       for (; temp; temp--)
  37         *lto++ = *lfrom++;
  38       to = lto;
  39       from = lfrom;
  40     }
  41   if (n & 2)
  42     {
  43       short *sto = to;
  44       const short *sfrom = from;
  45       *sto++ = *sfrom++;
  46       to = sto;
  47       from = sfrom;
  48     }
  49   if (n & 1)
  50     {
  51       char *cto = to;
  52       const char *cfrom = from;
  53       *cto = *cfrom;
  54     }
  55   return xto;
  56 #else
  57   const char *c_from = from;
  58   char *c_to = to;
  59   while (n-- > 0)
  60     *c_to++ = *c_from++;
  61   return((void *) to);
  62 #endif
  63 }