1#ifndef _X86_64_STRING_H_
2#define _X86_64_STRING_H_
3
4#ifdef __KERNEL__
5
6/* Written 2002 by Andi Kleen */
7
8/* Only used for special circumstances. Stolen from i386/string.h */
9static __always_inline void *
10__inline_memcpy(void * to, const void * from, size_t n)
11{
12unsigned long d0, d1, d2;
13__asm__ __volatile__(
14	"rep ; movsl\n\t"
15	"testb $2,%b4\n\t"
16	"je 1f\n\t"
17	"movsw\n"
18	"1:\ttestb $1,%b4\n\t"
19	"je 2f\n\t"
20	"movsb\n"
21	"2:"
22	: "=&c" (d0), "=&D" (d1), "=&S" (d2)
23	:"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from)
24	: "memory");
25return (to);
26}
27
28/* Even with __builtin_ the compiler may decide to use the out of line
29   function. */
30
31#define __HAVE_ARCH_MEMCPY 1
32extern void *__memcpy(void *to, const void *from, size_t len);
33#define memcpy(dst,src,len) \
34	({ size_t __len = (len);				\
35	   void *__ret;						\
36	   if (__builtin_constant_p(len) && __len >= 64)	\
37		 __ret = __memcpy((dst),(src),__len);		\
38	   else							\
39		 __ret = __builtin_memcpy((dst),(src),__len);	\
40	   __ret; })
41
42
43#define __HAVE_ARCH_MEMSET
44void *memset(void *s, int c, size_t n);
45
46#define __HAVE_ARCH_MEMMOVE
47void * memmove(void * dest,const void *src,size_t count);
48
49int memcmp(const void * cs,const void * ct,size_t count);
50size_t strlen(const char * s);
51char *strcpy(char * dest,const char *src);
52char *strcat(char * dest, const char * src);
53int strcmp(const char * cs,const char * ct);
54
55#endif /* __KERNEL__ */
56
57#endif
58