1#ifndef _X86_64_STRING_H_ 2#define _X86_64_STRING_H_ 3 4#ifdef __KERNEL__ 5 6#define struct_cpy(x,y) (*(x)=*(y)) 7 8/* Written 2002 by Andi Kleen */ 9 10/* Only used for special circumstances. Stolen from i386/string.h */ 11static inline void * __inline_memcpy(void * to, const void * from, size_t n) 12{ 13unsigned long d0, d1, d2; 14__asm__ __volatile__( 15 "rep ; movsl\n\t" 16 "testb $2,%b4\n\t" 17 "je 1f\n\t" 18 "movsw\n" 19 "1:\ttestb $1,%b4\n\t" 20 "je 2f\n\t" 21 "movsb\n" 22 "2:" 23 : "=&c" (d0), "=&D" (d1), "=&S" (d2) 24 :"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from) 25 : "memory"); 26return (to); 27} 28 29/* Even with __builtin_ the compiler may decide to use the out of line 30 function. */ 31 32#define __HAVE_ARCH_MEMCPY 1 33extern void *__memcpy(void *to, const void *from, size_t len); 34#define memcpy(dst,src,len) \ 35 ({ size_t __len = (len); \ 36 void *__ret; \ 37 if (__builtin_constant_p(len) && __len >= 64) \ 38 __ret = __memcpy((dst),(src),__len); \ 39 else \ 40 __ret = __builtin_memcpy((dst),(src),__len); \ 41 __ret; }) 42 43 44#define __HAVE_ARCH_MEMSET 45#define memset __builtin_memset 46 47#define __HAVE_ARCH_MEMMOVE 48void * memmove(void * dest,const void *src,size_t count); 49 50#endif /* __KERNEL__ */ 51 52#endif 53