#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 __always_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 1extern 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_MEMSETvoid *memset(void *s, int c, size_t n); #define __HAVE_ARCH_MEMMOVEvoid * memmove(void * dest,const void *src,size_t count); int memcmp(const void * cs,const void * ct,size_t count);size_t strlen(const char * s);char *strcpy(char * dest,const char *src);char *strcat(char * dest, const char * src);int strcmp(const char * cs,const char * ct); #endif /* __KERNEL__ */ #endif