root/arch/x86/lib/memcpy_32.c

DEFINITIONS

1. memcpy
2. memset
3. memmove

#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+src),
                         "2" (n-1+dest)
                        :"memory");
        }
        return dest;
}
EXPORT_SYMBOL(memmove);