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 inline void * __inline_memcpy(void * to, const void * from, size_t n)
11 unsigned long d0, d1, d2;
17 "1:\ttestb $1,%b4\n\t"
21 : "=&c" (d0), "=&D" (d1), "=&S" (d2)
22 :"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from)
27 /* Even with __builtin_ the compiler may decide to use the out of line
30 #define __HAVE_ARCH_MEMCPY 1
31 extern void *__memcpy(void *to, const void *from, size_t len);
32 #define memcpy(dst,src,len) \
33 ({ size_t __len = (len); \
35 if (__builtin_constant_p(len) && __len >= 64) \
36 __ret = __memcpy((dst),(src),__len); \
38 __ret = __builtin_memcpy((dst),(src),__len); \
42 #define __HAVE_ARCH_MEMSET
43 #define memset __builtin_memset
45 #define __HAVE_ARCH_MEMMOVE
46 void * memmove(void * dest,const void *src,size_t count);
48 /* Use C out of line version for memcmp */
49 #define memcmp __builtin_memcmp
50 int memcmp(const void * cs,const void * ct,size_t count);
52 /* out of line string functions use always C versions */
53 #define strlen __builtin_strlen
54 size_t strlen(const char * s);
56 #define strcpy __builtin_strcpy
57 char * strcpy(char * dest,const char *src);
59 #define strcat __builtin_strcat
60 char * strcat(char * dest, const char * src);
62 #define strcmp __builtin_strcmp
63 int strcmp(const char * cs,const char * ct);
65 #endif /* __KERNEL__ */