mirror of
https://github.com/torvalds/linux.git
synced 2024-12-10 21:21:54 +00:00
44 lines
737 B
C
44 lines
737 B
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);
|