68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
#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
|