1 #ifndef _X86_64_STRING_H_
2 #define _X86_64_STRING_H_
6 /* Written 2002 by Andi Kleen */
8 /* Only used for special circumstances. Stolen from i386/string.h */
9 static __always_inline void *__inline_memcpy(void *to, const void *from, size_t n)
11 unsigned long d0, d1, d2;
12 asm volatile("rep ; movsl\n\t"
16 "1:\ttestb $1,%b4\n\t"
20 : "=&c" (d0), "=&D" (d1), "=&S" (d2)
21 : "0" (n / 4), "q" (n), "1" ((long)to), "2" ((long)from)
26 /* Even with __builtin_ the compiler may decide to use the out of line
29 #define __HAVE_ARCH_MEMCPY 1
30 #if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4
31 extern void *memcpy(void *to, const void *from, size_t len);
33 extern void *__memcpy(void *to, const void *from, size_t len);
34 #define memcpy(dst, src, len) \
36 size_t __len = (len); \
38 if (__builtin_constant_p(len) && __len >= 64) \
39 __ret = __memcpy((dst), (src), __len); \
41 __ret = __builtin_memcpy((dst), (src), __len); \
46 #define __HAVE_ARCH_MEMSET
47 void *memset(void *s, int c, size_t n);
49 #define __HAVE_ARCH_MEMMOVE
50 void *memmove(void *dest, const void *src, size_t count);
52 int memcmp(const void *cs, const void *ct, size_t count);
53 size_t strlen(const char *s);
54 char *strcpy(char *dest, const char *src);
55 char *strcat(char *dest, const char *src);
56 int strcmp(const char *cs, const char *ct);
58 #endif /* __KERNEL__ */