[mirror_ubuntu-artful-kernel.git] / arch / x86 / include / asm / string_64.h

#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
#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

#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 */
Commit	Line	Data
1965aae3 PA	1	#ifndef _ASM_X86_STRING_64_H
1965aae3 PA	2	#define _ASM_X86_STRING_64_H
1da177e4 LT	3
	4	#ifdef __KERNEL__
	5
953b2f1e	6	/* Written 2002 by Andi Kleen */
1da177e4	7
953b2f1e JP	8	/* Only used for special circumstances. Stolen from i386/string.h */
953b2f1e JP	9	static __always_inline void __inline_memcpy(void to, const void *from, size_t n)
1da177e4	10	{
953b2f1e JP	11	unsigned long d0, d1, d2;
	12	asm volatile("rep ; movsl\n\t"
	13	"testb $2,%b4\n\t"
	14	"je 1f\n\t"
	15	"movsw\n"
	16	"1:\ttestb $1,%b4\n\t"
	17	"je 2f\n\t"
	18	"movsb\n"
	19	"2:"
	20	: "=&c" (d0), "=&D" (d1), "=&S" (d2)
	21	: "0" (n / 4), "q" (n), "1" ((long)to), "2" ((long)from)
	22	: "memory");
	23	return to;
1da177e4 LT	24	}
	25
	26	/* Even with __builtin_ the compiler may decide to use the out of line
	27	function. */
	28
	29	#define __HAVE_ARCH_MEMCPY 1
aac57f81 AK	30	#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) \|\| __GNUC__ > 4
	31	extern void memcpy(void to, const void *from, size_t len);
	32	#else
953b2f1e JP	33	extern void __memcpy(void to, const void *from, size_t len);
	34	#define memcpy(dst, src, len) \
	35	({ \
	36	size_t __len = (len); \
	37	void *__ret; \
	38	if (__builtin_constant_p(len) && __len >= 64) \
	39	__ret = __memcpy((dst), (src), __len); \
	40	else \
	41	__ret = __builtin_memcpy((dst), (src), __len); \
	42	__ret; \
	43	})
aac57f81	44	#endif
1da177e4 LT	45
1da177e4 LT	46	#define __HAVE_ARCH_MEMSET
6edfba1b	47	void memset(void s, int c, size_t n);
1da177e4 LT	48
1da177e4 LT	49	#define __HAVE_ARCH_MEMMOVE
953b2f1e	50	void memmove(void dest, const void *src, size_t count);
1da177e4	51
953b2f1e JP	52	int memcmp(const void cs, const void ct, size_t count);
	53	size_t strlen(const char *s);
	54	char strcpy(char dest, const char *src);
	55	char strcat(char dest, const char *src);
	56	int strcmp(const char cs, const char ct);
1da177e4 LT	57
	58	#endif /* __KERNEL__ */
	59
1965aae3	60	#endif /* _ASM_X86_STRING_64_H */