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   1 /* $Id: string.h,v 1.20 2001/09/27 04:36:24 kanoj Exp $
   2  * string.h: External definitions for optimized assembly string
   3  *           routines for the Linux Kernel.
   4  *
   5  * Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
   6  * Copyright (C) 1996,1997,1999 Jakub Jelinek (jakub@redhat.com)
   7  */
   8
   9 #ifndef __SPARC64_STRING_H__
  10 #define __SPARC64_STRING_H__
  11
  12 /* Really, userland/ksyms should not see any of this stuff. */
  13
  14 #ifdef __KERNEL__
  15
  16 #include <asm/asi.h>
  17
  18 extern void *__memset(void *,int,__kernel_size_t);
  19
  20 #ifndef EXPORT_SYMTAB_STROPS
  21
  22 /* First the mem*() things. */
  23 #define __HAVE_ARCH_MEMMOVE
  24 extern void *memmove(void *, const void *, __kernel_size_t);
  25
  26 #define __HAVE_ARCH_MEMCPY
  27 extern void *memcpy(void *, const void *, __kernel_size_t);
  28
  29 #define __HAVE_ARCH_MEMSET
  30 extern void *__builtin_memset(void *,int,__kernel_size_t);
  31
  32 static inline void *__constant_memset(void *s, int c, __kernel_size_t count)
  33 {
  34         extern __kernel_size_t __bzero(void *, __kernel_size_t);
  35
  36         if (!c) {
  37                 __bzero(s, count);
  38                 return s;
  39         } else
  40                 return __memset(s, c, count);
  41 }
  42
  43 #undef memset
  44 #define memset(s, c, count) \
  45 ((__builtin_constant_p(count) && (count) <= 32) ? \
  46  __builtin_memset((s), (c), (count)) : \
  47  (__builtin_constant_p(c) ? \
  48   __constant_memset((s), (c), (count)) : \
  49   __memset((s), (c), (count))))
  50
  51 #define __HAVE_ARCH_MEMSCAN
  52
  53 #undef memscan
  54 #define memscan(__arg0, __char, __arg2)                                 \
  55 ({                                                                      \
  56         extern void *__memscan_zero(void *, size_t);                    \
  57         extern void *__memscan_generic(void *, int, size_t);            \
  58         void *__retval, *__addr = (__arg0);                             \
  59         size_t __size = (__arg2);                                       \
  60                                                                         \
  61         if(__builtin_constant_p(__char) && !(__char))                   \
  62                 __retval = __memscan_zero(__addr, __size);              \
  63         else                                                            \
  64                 __retval = __memscan_generic(__addr, (__char), __size); \
  65                                                                         \
  66         __retval;                                                       \
  67 })
  68
  69 #define __HAVE_ARCH_MEMCMP
  70 extern int memcmp(const void *,const void *,__kernel_size_t);
  71
  72 /* Now the str*() stuff... */
  73 #define __HAVE_ARCH_STRLEN
  74 extern __kernel_size_t strlen(const char *);
  75
  76 #define __HAVE_ARCH_STRNCMP
  77 extern int strncmp(const char *, const char *, __kernel_size_t);
  78
  79 #endif /* !EXPORT_SYMTAB_STROPS */
  80
  81 #endif /* __KERNEL__ */
  82
  83 #endif /* !(__SPARC64_STRING_H__) */