include/asm-sparc64/string.h

   1 /* $Id: string.h,v 1.17 2000/06/19 06:24:58 davem 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 __memmove(void *,const void *,__kernel_size_t);
  19 extern __kernel_size_t __memcpy(void *,const void *,__kernel_size_t);
  20 extern __kernel_size_t __memcpy_short(void *,const void *,__kernel_size_t,long,long);
  21 extern __kernel_size_t __memcpy_entry(void *,const void *,__kernel_size_t,long,long);
  22 extern __kernel_size_t __memcpy_16plus(void *,const void *,__kernel_size_t,long,long);
  23 extern __kernel_size_t __memcpy_384plus(void *,const void *,__kernel_size_t,long,long);
  24 extern void *__memset(void *,int,__kernel_size_t);
  25 extern void *__builtin_memcpy(void *,const void *,__kernel_size_t);
  26 extern void *__builtin_memset(void *,int,__kernel_size_t);
  27
  28 #ifndef EXPORT_SYMTAB_STROPS
  29
  30 /* First the mem*() things. */
  31 #define __HAVE_ARCH_BCOPY
  32 #define __HAVE_ARCH_MEMMOVE
  33
  34 #undef memmove
  35 #define memmove(_to, _from, _n) \
  36 ({ \
  37         void *_t = (_to); \
  38         __memmove(_t, (_from), (_n)); \
  39         _t; \
  40 })
  41
  42 #define __HAVE_ARCH_MEMCPY
  43
  44 static inline void *__constant_memcpy(void *to, const void *from, __kernel_size_t n)
  45 {
  46         if(n) {
  47                 if(n <= 32) {
  48                         __builtin_memcpy(to, from, n);
  49                 } else {
  50                         __memcpy(to, from, n);
  51                 }
  52         }
  53         return to;
  54 }
  55
  56 static inline void *__nonconstant_memcpy(void *to, const void *from, __kernel_size_t n)
  57 {
  58         __memcpy(to, from, n);
  59         return to;
  60 }
  61
  62 #undef memcpy
  63 #define memcpy(t, f, n) \
  64 (__builtin_constant_p(n) ? \
  65  __constant_memcpy((t),(f),(n)) : \
  66  __nonconstant_memcpy((t),(f),(n)))
  67
  68 #define __HAVE_ARCH_MEMSET
  69
  70 static inline void *__constant_memset(void *s, int c, __kernel_size_t count)
  71 {
  72         extern __kernel_size_t __bzero(void *, __kernel_size_t);
  73
  74         if(!c) {
  75                 __bzero(s, count);
  76                 return s;
  77         } else
  78                 return __memset(s, c, count);
  79 }
  80
  81 #undef memset
  82 #define memset(s, c, count) \
  83 ((__builtin_constant_p(count) && (count) <= 32) ? \
  84  __builtin_memset((s), (c), (count)) : \
  85  (__builtin_constant_p(c) ? \
  86   __constant_memset((s), (c), (count)) : \
  87   __memset((s), (c), (count))))
  88
  89 #define __HAVE_ARCH_MEMSCAN
  90
  91 #undef memscan
  92 #define memscan(__arg0, __char, __arg2)                                         \
  93 ({                                                                              \
  94         extern void *__memscan_zero(void *, size_t);                            \
  95         extern void *__memscan_generic(void *, int, size_t);                    \
  96         void *__retval, *__addr = (__arg0);                                     \
  97         size_t __size = (__arg2);                                               \
  98                                                                                 \
  99         if(__builtin_constant_p(__char) && !(__char))                           \
 100                 __retval = __memscan_zero(__addr, __size);                      \
 101         else                                                                    \
 102                 __retval = __memscan_generic(__addr, (__char), __size);         \
 103                                                                                 \
 104         __retval;                                                               \
 105 })
 106
 107 #define __HAVE_ARCH_MEMCMP
 108
 109 /* Now the str*() stuff... */
 110 #define __HAVE_ARCH_STRLEN
 111
 112 extern __kernel_size_t __strlen(const char *);
 113
 114 #if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ >= 91)
 115 extern __kernel_size_t strlen(const char *);
 116 #else /* !EGCS */
 117 /* Ugly but it works around a bug in our original sparc64-linux-gcc.  */
 118 #undef strlen
 119 #define strlen(__arg0)                                  \
 120 ({      int __strlen_res = __strlen(__arg0) + 1;        \
 121         __strlen_res -= 1;                              \
 122         __strlen_res;                                   \
 123 })
 124 #endif /* !EGCS */
 125
 126 #define __HAVE_ARCH_STRNCMP
 127
 128 extern int __strncmp(const char *, const char *, __kernel_size_t);
 129
 130 static inline int __constant_strncmp(const char *src, const char *dest, __kernel_size_t count)
 131 {
 132         register int retval;
 133         switch(count) {
 134         case 0: return 0;
 135         case 1: return (src[0] - dest[0]);
 136         case 2: retval = (src[0] - dest[0]);
 137                 if(!retval && src[0])
 138                   retval = (src[1] - dest[1]);
 139                 return retval;
 140         case 3: retval = (src[0] - dest[0]);
 141                 if(!retval && src[0]) {
 142                   retval = (src[1] - dest[1]);
 143                   if(!retval && src[1])
 144                     retval = (src[2] - dest[2]);
 145                 }
 146                 return retval;
 147         case 4: retval = (src[0] - dest[0]);
 148                 if(!retval && src[0]) {
 149                   retval = (src[1] - dest[1]);
 150                   if(!retval && src[1]) {
 151                     retval = (src[2] - dest[2]);
 152                     if (!retval && src[2])
 153                       retval = (src[3] - dest[3]);
 154                   }
 155                 }
 156                 return retval;
 157         case 5: retval = (src[0] - dest[0]);
 158                 if(!retval && src[0]) {
 159                   retval = (src[1] - dest[1]);
 160                   if(!retval && src[1]) {
 161                     retval = (src[2] - dest[2]);
 162                     if (!retval && src[2]) {
 163                       retval = (src[3] - dest[3]);
 164                       if (!retval && src[3])
 165                         retval = (src[4] - dest[4]);
 166                     }
 167                   }
 168                 }
 169                 return retval;
 170         default:
 171                 retval = (src[0] - dest[0]);
 172                 if(!retval && src[0]) {
 173                   retval = (src[1] - dest[1]);
 174                   if(!retval && src[1]) {
 175                     retval = (src[2] - dest[2]);
 176                     if(!retval && src[2])
 177                       retval = __strncmp(src+3,dest+3,count-3);
 178                   }
 179                 }
 180                 return retval;
 181         }
 182 }
 183
 184 #undef strncmp
 185 #define strncmp(__arg0, __arg1, __arg2) \
 186 (__builtin_constant_p(__arg2) ? \
 187  __constant_strncmp(__arg0, __arg1, __arg2) : \
 188  __strncmp(__arg0, __arg1, __arg2))
 189
 190 #endif /* !EXPORT_SYMTAB_STROPS */
 191
 192 #endif /* __KERNEL__ */
 193
 194 #endif /* !(__SPARC64_STRING_H__) */