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#ifndef _X86_64_STRING_H_
#define _X86_64_STRING_H_
#ifdef __KERNEL__
/* Written 2002 by Andi Kleen */
/* Only used for special circumstances. Stolen from i386/string.h */
static inline void * __inline_memcpy(void * to, const void * from, size_t n)
{
unsigned long d0, d1, d2;
__asm__ __volatile__(
"rep ; movsl\n\t"
"testb $2,%b4\n\t"
"je 1f\n\t"
"movsw\n"
"1:\ttestb $1,%b4\n\t"
"je 2f\n\t"
"movsb\n"
"2:"
: "=&c" (d0), "=&D" (d1), "=&S" (d2)
:"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from)
: "memory");
return (to);
}
/* Even with __builtin_ the compiler may decide to use the out of line
function. */
#define __HAVE_ARCH_MEMCPY 1
extern void *__memcpy(void *to, const void *from, size_t len);
#define memcpy(dst,src,len) \
({ size_t __len = (len); \
void *__ret; \
if (__builtin_constant_p(len) && __len >= 64) \
__ret = __memcpy((dst),(src),__len); \
else \
__ret = __builtin_memcpy((dst),(src),__len); \
__ret; })
#define __HAVE_ARCH_MEMSET
#define memset __builtin_memset
#define __HAVE_ARCH_MEMMOVE
void * memmove(void * dest,const void *src,size_t count);
/* Use C out of line version for memcmp */
#define memcmp __builtin_memcmp
int memcmp(const void * cs,const void * ct,size_t count);
/* out of line string functions use always C versions */
#define strlen __builtin_strlen
size_t strlen(const char * s);
#define strcpy __builtin_strcpy
char * strcpy(char * dest,const char *src);
#define strcat __builtin_strcat
char * strcat(char * dest, const char * src);
#define strcmp __builtin_strcmp
int strcmp(const char * cs,const char * ct);
#endif /* __KERNEL__ */
#endif
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