include/asm-alpha/string.h

   1 #ifndef __ALPHA_STRING_H__
   2 #define __ALPHA_STRING_H__
   3
   4 #ifdef __KERNEL__
   5
   6 /*
   7  * GCC of any recent vintage doesn't do stupid things with bcopy.
   8  * EGCS 1.1 knows all about expanding memcpy inline, others don't.
   9  *
  10  * Similarly for a memset with data = 0.
  11  */
  12
  13 #define __HAVE_ARCH_MEMCPY
  14 extern void * memcpy(void *, const void *, size_t);
  15 #define __HAVE_ARCH_MEMMOVE
  16 extern void * memmove(void *, const void *, size_t);
  17
  18 /* For backward compatibility with modules.  Unused otherwise.  */
  19 extern void * __memcpy(void *, const void *, size_t);
  20
  21 #define memcpy __builtin_memcpy
  22
  23 #define __HAVE_ARCH_MEMSET
  24 extern void * __constant_c_memset(void *, unsigned long, size_t);
  25 extern void * __memset(void *, int, size_t);
  26 extern void * memset(void *, int, size_t);
  27
  28 #define memset(s, c, n)                                                     \
  29 (__builtin_constant_p(c)                                                    \
  30  ? (__builtin_constant_p(n) && (c) == 0                                     \
  31     ? __builtin_memset((s),0,(n))                                           \
  32     : __constant_c_memset((s),0x0101010101010101UL*(unsigned char)(c),(n))) \
  33  : __memset((s),(c),(n)))
  34
  35 #define __HAVE_ARCH_STRCPY
  36 extern char * strcpy(char *,const char *);
  37 #define __HAVE_ARCH_STRNCPY
  38 extern char * strncpy(char *, const char *, size_t);
  39 #define __HAVE_ARCH_STRCAT
  40 extern char * strcat(char *, const char *);
  41 #define __HAVE_ARCH_STRNCAT
  42 extern char * strncat(char *, const char *, size_t);
  43 #define __HAVE_ARCH_STRCHR
  44 extern char * strchr(const char *,int);
  45 #define __HAVE_ARCH_STRRCHR
  46 extern char * strrchr(const char *,int);
  47 #define __HAVE_ARCH_STRLEN
  48 extern size_t strlen(const char *);
  49 #define __HAVE_ARCH_MEMCHR
  50 extern void * memchr(const void *, int, size_t);
  51
  52 /* The following routine is like memset except that it writes 16-bit
  53    aligned values.  The DEST and COUNT parameters must be even for
  54    correct operation.  */
  55
  56 #define __HAVE_ARCH_MEMSETW
  57 extern void * __memsetw(void *dest, unsigned short, size_t count);
  58
  59 #define memsetw(s, c, n)                                                 \
  60 (__builtin_constant_p(c)                                                 \
  61  ? __constant_c_memset((s),0x0001000100010001UL*(unsigned short)(c),(n)) \
  62  : __memsetw((s),(c),(n)))
  63
  64 #endif /* __KERNEL__ */
  65
  66 #endif /* __ALPHA_STRING_H__ */