arch/alpha/include/asm/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 extern void * memset(void *, int, size_t);
  28
  29 /* For gcc 3.x, we cannot have the inline function named "memset" because
  30    the __builtin_memset will attempt to resolve to the inline as well,
  31    leading to a "sorry" about unimplemented recursive inlining.  */
  32 extern inline void *__memset(void *s, int c, size_t n)
  33 {
  34         if (__builtin_constant_p(c)) {
  35                 if (__builtin_constant_p(n)) {
  36                         return __builtin_memset(s, c, n);
  37                 } else {
  38                         unsigned long c8 = (c & 0xff) * 0x0101010101010101UL;
  39                         return __constant_c_memset(s, c8, n);
  40                 }
  41         }
  42         return ___memset(s, c, n);
  43 }
  44
  45 #define memset __memset
  46
  47 #define __HAVE_ARCH_STRCPY
  48 extern char * strcpy(char *,const char *);
  49 #define __HAVE_ARCH_STRNCPY
  50 extern char * strncpy(char *, const char *, size_t);
  51 #define __HAVE_ARCH_STRCAT
  52 extern char * strcat(char *, const char *);
  53 #define __HAVE_ARCH_STRNCAT
  54 extern char * strncat(char *, const char *, size_t);
  55 #define __HAVE_ARCH_STRCHR
  56 extern char * strchr(const char *,int);
  57 #define __HAVE_ARCH_STRRCHR
  58 extern char * strrchr(const char *,int);
  59 #define __HAVE_ARCH_STRLEN
  60 extern size_t strlen(const char *);
  61 #define __HAVE_ARCH_MEMCHR
  62 extern void * memchr(const void *, int, size_t);
  63
  64 /* The following routine is like memset except that it writes 16-bit
  65    aligned values.  The DEST and COUNT parameters must be even for
  66    correct operation.  */
  67
  68 #define __HAVE_ARCH_MEMSETW
  69 extern void * __memsetw(void *dest, unsigned short, size_t count);
  70
  71 #define memsetw(s, c, n)                                                 \
  72 (__builtin_constant_p(c)                                                 \
  73  ? __constant_c_memset((s),0x0001000100010001UL*(unsigned short)(c),(n)) \
  74  : __memsetw((s),(c),(n)))
  75
  76 #endif /* __KERNEL__ */
  77
  78 #endif /* __ALPHA_STRING_H__ */