Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
32#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4
33extern void *memcpy(void *to, const void *from, size_t len);
34#else
35extern void *__memcpy(void *to, const void *from, size_t len);
36#define memcpy(dst,src,len) \
37 ({ size_t __len = (len); \
38 void *__ret; \
39 if (__builtin_constant_p(len) && __len >= 64) \
40 __ret = __memcpy((dst),(src),__len); \
41 else \
42 __ret = __builtin_memcpy((dst),(src),__len); \
43 __ret; })
44#endif
45
46#define __HAVE_ARCH_MEMSET
47void *memset(void *s, int c, size_t n);
48
49#define __HAVE_ARCH_MEMMOVE
50void * memmove(void * dest,const void *src,size_t count);
51
52int memcmp(const void * cs,const void * ct,size_t count);
53size_t strlen(const char * s);
54char *strcpy(char * dest,const char *src);
55char *strcat(char * dest, const char * src);
56int strcmp(const char * cs,const char * ct);
57
58#endif /* __KERNEL__ */
59
60#endif