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memcpy_32.c

#include <linux/string.h>
#include <linux/module.h>

#undef memcpy
#undef memset

void *memcpy(void *to, const void *from, size_t n)
{
#ifdef CONFIG_X86_USE_3DNOW
      return __memcpy3d(to, from, n);
#else
      return __memcpy(to, from, n);
#endif
}
EXPORT_SYMBOL(memcpy);

void *memset(void *s, int c, size_t count)
{
      return __memset(s, c, count);
}
EXPORT_SYMBOL(memset);

void *memmove(void *dest, const void *src, size_t n)
{
      int d0, d1, d2;

      if (dest < src) {
            memcpy(dest,src,n);
      } else {
            __asm__ __volatile__(
                  "std\n\t"
                  "rep\n\t"
                  "movsb\n\t"
                  "cld"
                  : "=&c" (d0), "=&S" (d1), "=&D" (d2)
                  :"0" (n),
                   "1" (n-1+(const char *)src),
                   "2" (n-1+(char *)dest)
                  :"memory");
      }
      return dest;
}
EXPORT_SYMBOL(memmove);

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