You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
1.8 KiB
68 lines
1.8 KiB
#ifndef _ASM_X86_STRING_64_H
|
|
#define _ASM_X86_STRING_64_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 1
|
|
#ifndef CONFIG_KMEMCHECK
|
|
#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4
|
|
extern void *memcpy(void *to, const void *from, size_t len);
|
|
#else
|
|
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; \
|
|
})
|
|
#endif
|
|
#else
|
|
/*
|
|
* kmemcheck becomes very happy if we use the REP instructions unconditionally,
|
|
* because it means that we know both memory operands in advance.
|
|
*/
|
|
#define memcpy(dst, src, len) __inline_memcpy((dst), (src), (len))
|
|
#endif
|
|
|
|
#define __HAVE_ARCH_MEMSET
|
|
void *memset(void *s, int c, size_t n);
|
|
|
|
#define __HAVE_ARCH_MEMMOVE
|
|
void *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 /* _ASM_X86_STRING_64_H */
|
|
|