i386/linux-2.3.21/include/asm-sparc64/string.h

   1 /* $Id: string.h,v 1.14 1998/10/20 03:09:18 jj 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 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   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 __kernel_size_t __memset(void *,int,__kernel_size_t);
  25
  26 #ifndef EXPORT_SYMTAB_STROPS
  27
  28 /* First the mem*() things. */
  29 #define __HAVE_ARCH_BCOPY
  30 #define __HAVE_ARCH_MEMMOVE
  31
  32 #undef memmove
  33 #define memmove(_to, _from, _n) \
  34 ({ \
  35         void *_t = (_to); \
  36         __memmove(_t, (_from), (_n)); \
  37         _t; \
  38 })
  39
  40 #define __HAVE_ARCH_MEMCPY
  41
  42 extern inline void *__constant_memcpy(void *to, const void *from, __kernel_size_t n)
  43 {
  44         if(n) {
  45                 if(n <= 32) {
  46                         __builtin_memcpy(to, from, n);
  47                 } else {
  48                         __memcpy(to, from, n);
  49                 }
  50         }
  51         return to;
  52 }
  53
  54 extern inline void *__nonconstant_memcpy(void *to, const void *from, __kernel_size_t n)
  55 {
  56         __memcpy(to, from, n);
  57         return to;
  58 }
  59
  60 #undef memcpy
  61 #define memcpy(t, f, n) \
  62 (__builtin_constant_p(n) ? \
  63  __constant_memcpy((t),(f),(n)) : \
  64  __nonconstant_memcpy((t),(f),(n)))
  65
  66 #define __HAVE_ARCH_MEMSET
  67
  68 extern inline void *__constant_memset(void *s, char c, __kernel_size_t count)
  69 {
  70         extern __kernel_size_t __bzero(void *, __kernel_size_t);
  71
  72         if(!c)
  73                 __bzero(s, count);
  74         else
  75                 __memset(s, c, count);
  76         return s;
  77 }
  78
  79 extern inline void *__nonconstant_memset(void *s, char c, __kernel_size_t count)
  80 {
  81         __memset(s, c, count);
  82         return s;
  83 }
  84
  85 #undef memset
  86 #define memset(s, c, count) \
  87 (__builtin_constant_p(c) ? \
  88  __constant_memset((s), (c), (count)) : \
  89  __nonconstant_memset((s), (c), (count)))
  90
  91 #define __HAVE_ARCH_MEMSCAN
  92
  93 #undef memscan
  94 #define memscan(__arg0, __char, __arg2)                                         \
  95 ({                                                                              \
  96         extern void *__memscan_zero(void *, size_t);                            \
  97         extern void *__memscan_generic(void *, int, size_t);                    \
  98         void *__retval, *__addr = (__arg0);                                     \
  99         size_t __size = (__arg2);                                               \
 100                                                                                 \
 101         if(__builtin_constant_p(__char) && !(__char))                           \
 102                 __retval = __memscan_zero(__addr, __size);                      \
 103         else                                                                    \
 104                 __retval = __memscan_generic(__addr, (__char), __size);         \
 105                                                                                 \
 106         __retval;                                                               \
 107 })
 108
 109 #define __HAVE_ARCH_MEMCMP
 110
 111 /* Now the str*() stuff... */
 112 #define __HAVE_ARCH_STRLEN
 113
 114 extern __kernel_size_t __strlen(const char *);
 115
 116 #if __GNUC__ > 2 || __GNUC_MINOR__ >= 91
 117 extern __kernel_size_t strlen(const char *);
 118 #else /* !EGCS */
 119 /* Ugly but it works around a bug in our original sparc64-linux-gcc.  */
 120 #undef strlen
 121 #define strlen(__arg0)                                  \
 122 ({      int __strlen_res = __strlen(__arg0) + 1;        \
 123         __strlen_res -= 1;                              \
 124         __strlen_res;                                   \
 125 })
 126 #endif /* !EGCS */
 127
 128 #define __HAVE_ARCH_STRNCMP
 129
 130 extern int __strncmp(const char *, const char *, __kernel_size_t);
 131
 132 extern inline int __constant_strncmp(const char *src, const char *dest, __kernel_size_t count)
 133 {
 134         register int retval;
 135         switch(count) {
 136         case 0: return 0;
 137         case 1: return (src[0] - dest[0]);
 138         case 2: retval = (src[0] - dest[0]);
 139                 if(!retval && src[0])
 140                   retval = (src[1] - dest[1]);
 141                 return retval;
 142         case 3: retval = (src[0] - dest[0]);
 143                 if(!retval && src[0]) {
 144                   retval = (src[1] - dest[1]);
 145                   if(!retval && src[1])
 146                     retval = (src[2] - dest[2]);
 147                 }
 148                 return retval;
 149         case 4: retval = (src[0] - dest[0]);
 150                 if(!retval && src[0]) {
 151                   retval = (src[1] - dest[1]);
 152                   if(!retval && src[1]) {
 153                     retval = (src[2] - dest[2]);
 154                     if (!retval && src[2])
 155                       retval = (src[3] - dest[3]);
 156                   }
 157                 }
 158                 return retval;
 159         case 5: retval = (src[0] - dest[0]);
 160                 if(!retval && src[0]) {
 161                   retval = (src[1] - dest[1]);
 162                   if(!retval && src[1]) {
 163                     retval = (src[2] - dest[2]);
 164                     if (!retval && src[2]) {
 165                       retval = (src[3] - dest[3]);
 166                       if (!retval && src[3])
 167                         retval = (src[4] - dest[4]);
 168                     }
 169                   }
 170                 }
 171                 return retval;
 172         default:
 173                 retval = (src[0] - dest[0]);
 174                 if(!retval && src[0]) {
 175                   retval = (src[1] - dest[1]);
 176                   if(!retval && src[1]) {
 177                     retval = (src[2] - dest[2]);
 178                     if(!retval && src[2])
 179                       retval = __strncmp(src+3,dest+3,count-3);
 180                   }
 181                 }
 182                 return retval;
 183         }
 184 }
 185
 186 #undef strncmp
 187 #define strncmp(__arg0, __arg1, __arg2) \
 188 (__builtin_constant_p(__arg2) ? \
 189  __constant_strncmp(__arg0, __arg1, __arg2) : \
 190  __strncmp(__arg0, __arg1, __arg2))
 191
 192 #endif /* !EXPORT_SYMTAB_STROPS */
 193
 194 #endif /* __KERNEL__ */
 195
 196 #endif /* !(__SPARC64_STRING_H__) */