arch/alpha/include/asm/string.h

Source file repositories/reference/linux-study-clean/arch/alpha/include/asm/string.h

File Facts

System
Linux kernel
Corpus path
arch/alpha/include/asm/string.h
Extension
.h
Size
2400 bytes
Lines
79
Domain
Architecture Layer
Bucket
arch/alpha
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

if (__builtin_constant_p(n)) {
			return __builtin_memset(s, c, n);
		} else {
			unsigned long c8 = (c & 0xff) * 0x0101010101010101UL;
			return __constant_c_memset(s, c8, n);
		}
	}
	return ___memset(s, c, n);
}

#define memset __memset

#define __HAVE_ARCH_STRCPY
extern char * strcpy(char *,const char *);
#define __HAVE_ARCH_STRCAT
extern char * strcat(char *, const char *);
#define __HAVE_ARCH_STRNCAT
extern char * strncat(char *, const char *, size_t);
#define __HAVE_ARCH_STRCHR
extern char * strchr(const char *,int);
#define __HAVE_ARCH_STRRCHR
extern char * strrchr(const char *,int);
#define __HAVE_ARCH_STRLEN
extern size_t strlen(const char *);
#define __HAVE_ARCH_MEMCHR
extern void * memchr(const void *, int, size_t);

/* The following routine is like memset except that it writes 16-bit
   aligned values.  The DEST and COUNT parameters must be even for 
   correct operation.  */

#define __HAVE_ARCH_MEMSET16
extern void * __memset16(void *dest, unsigned short, size_t count);
static inline void *memset16(uint16_t *p, uint16_t v, size_t n)
{
	if (__builtin_constant_p(v))
		return __constant_c_memset(p, 0x0001000100010001UL * v, n * 2);
	return __memset16(p, v, n * 2);
}

#endif /* __KERNEL__ */

#endif /* __ALPHA_STRING_H__ */

Annotation

Implementation Notes