include/asm-mips/string.h

/* */
This source file includes following definitions.
strcpy
strncpy
strcmp
strncmp
memset
memcpy
memmove
   1 /*
   2  * include/asm-mips/string.h
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (c) 1994 by Ralf Baechle
   9  */
  10 
  11 #ifndef _ASM_MIPS_STRING_H_
  12 #define _ASM_MIPS_STRING_H_
  13 
  14 #define __USE_PORTABLE_STRINGS_H_
  15 
  16 extern inline char * strcpy(char * dest,const char *src)
     /*  */
  17 {
  18   char *xdest = dest;
  19 
  20   __asm__ __volatile__(
  21         ".set\tnoreorder\n\t"
  22         ".set\tnoat\n"
  23         "1:\tlbu\t$1,(%1)\n\t"
  24         "addiu\t%1,%1,1\n\t"
  25         "sb\t$1,(%0)\n\t"
  26         "bne\t$0,$1,1b\n\t"
  27         "addiu\t%0,%0,1\n\t"
  28         ".set\tat\n\t"
  29         ".set\treorder"
  30         : "=d" (dest), "=d" (src)
  31         : "0" (dest), "1" (src)
  32         : "$1","memory");
  33 
  34   return xdest;
  35 }
  36 
  37 extern inline char * strncpy(char *dest, const char *src, size_t n)
     /*  */
  38 {
  39   char *xdest = dest;
  40 
  41   if (n == 0)
  42     return xdest;
  43 
  44   __asm__ __volatile__(
  45         ".set\tnoreorder\n\t"
  46         ".set\tnoat\n"
  47         "1:\tlbu\t$1,(%1)\n\t"
  48         "addiu\t%2,%2,-1\n\t"
  49         "sb\t$1,(%0)\n\t"
  50         "beq\t$0,$1,2f\n\t"
  51         "addiu\t%0,%0,1\n\t"
  52         "bne\t$0,%2,1b\n\t"
  53         "addiu\t%1,%1,1\n"
  54         "2:\n\t"
  55         ".set\tat\n\t"
  56         ".set\treorder\n\t"
  57         : "=d" (dest), "=d" (src), "=d" (n)
  58         : "0" (dest), "1" (src), "2" (n)
  59         : "$1","memory");
  60 
  61   return dest;
  62 }
  63 
  64 #define __USE_PORTABLE_strcat
  65 #define __USE_PORTABLE_strncat
  66 
  67 extern inline int strcmp(const char * cs,const char * ct)
     /*  */
  68 {
  69   int __res;
  70 
  71   __asm__ __volatile__(
  72         ".set\tnoreorder\n\t"
  73         ".set\tnoat\n\t"
  74         "lbu\t%2,(%0)\n"
  75         "1:\tlbu\t$1,(%1)\n\t"
  76         "addiu\t%0,%0,1\n\t"
  77         "bne\t$1,%2,2f\n\t"
  78         "addiu\t%1,%1,1\n\t"
  79         "bne\t$0,%2,1b\n\t"
  80         "lbu\t%2,(%0)\n"
  81         "move\t%2,$1\n"
  82         "2:\tsub\t%2,%2,$1\n"
  83         "3:\t.set\tat\n\t"
  84         ".set\treorder\n\t"
  85         : "=d" (cs), "=d" (ct), "=d" (__res)
  86         : "0" (cs), "1" (ct)
  87         : "$1");
  88 
  89   return __res;
  90 }
  91 
  92 extern inline int strncmp(const char * cs,const char * ct,size_t count)
     /*  */
  93 {
  94   char __res;
  95 
  96   __asm__ __volatile__(
  97         ".set\tnoreorder\n\t"
  98         ".set\tnoat\n"
  99         "1:\tlbu\t%3,(%0)\n\t"
 100         "beq\t$0,%2,2f\n\t"
 101         "lbu\t$1,(%1)\n\t"
 102         "addiu\t%2,%2,-1\n\t"
 103         "bne\t$1,%3,3f\n\t"
 104         "addiu\t%0,%0,1\n\t"
 105         "bne\t$0,%3,1b\n\t"
 106         "addiu\t%1,%1,1\n"
 107         "2:\tmove\t%3,$1\n"
 108         "3:\tsub\t%3,%3,$1\n\t"
 109         ".set\tat\n\t"
 110         ".set\treorder"
 111         : "=d" (cs), "=d" (ct), "=d" (count), "=d" (__res)
 112         : "0" (cs), "1" (ct), "2" (count)
 113         : "$1");
 114 
 115   return __res;
 116 }
 117 
 118 #define __USE_PORTABLE_strchr
 119 #define __USE_PORTABLE_strlen
 120 #define __USE_PORTABLE_strspn
 121 #define __USE_PORTABLE_strpbrk
 122 #define __USE_PORTABLE_strtok
 123 
 124 extern inline void * memset(void * s,char c,size_t count)
     /*  */
 125 {
 126   void *xs = s;
 127 
 128   if (!count)
 129     return xs;
 130   __asm__ __volatile__(
 131         ".set\tnoreorder\n"
 132         "1:\tsb\t%3,(%0)\n\t"
 133         "addiu\t%1,%1,-1\n\t"
 134         "bne\t$0,%1,1b\n\t"
 135         "addiu\t%3,%3,1\n\t"
 136         ".set\treorder"
 137         : "=d" (s), "=d" (count)
 138         : "0" (s), "d" (c), "1" (count)
 139         : "memory");
 140 
 141   return xs;
 142 }
 143 
 144 extern inline void * memcpy(void * to, const void * from, size_t n)
     /*  */
 145 {
 146   void *xto = to;
 147 
 148   if (!n)
 149     return xto;
 150   __asm__ __volatile__(
 151         ".set\tnoreorder\n\t"
 152         ".set\tnoat\n"
 153         "1:\tlbu\t$1,(%1)\n\t"
 154         "addiu\t%1,%1,1\n\t"
 155         "sb\t$1,(%0)\n\t"
 156         "addiu\t%2,%2,-1\n\t"
 157         "bne\t$0,%2,1b\n\t"
 158         "addiu\t%0,%0,1\n\t"
 159         ".set\tat\n\t"
 160         ".set\treorder"
 161         : "=d" (to), "=d" (from), "=d" (n)
 162         : "0" (to), "1" (from), "2" (n)
 163         : "$1","memory" );
 164   return xto;
 165 }
 166 
 167 extern inline void * memmove(void * dest,const void * src, size_t n)
     /*  */
 168 {
 169   void *xdest = dest;
 170 
 171   if (!n)
 172     return xdest;
 173 
 174   if (dest < src)
 175     __asm__ __volatile__(
 176         ".set\tnoreorder\n\t"
 177         ".set\tnoat\n"
 178         "1:\tlbu\t$1,(%1)\n\t"
 179         "addiu\t%1,%1,1\n\t"
 180         "sb\t$1,(%0)\n\t"
 181         "addiu\t%2,%2,-1\n\t"
 182         "bne\t$0,%2,1b\n\t"
 183         "addiu\t%0,%0,1\n\t"
 184         ".set\tat\n\t"
 185         ".set\treorder"
 186         : "=d" (dest), "=d" (src), "=d" (n)
 187         : "0" (dest), "1" (src), "2" (n)
 188         : "$1","memory" );
 189   else
 190     __asm__ __volatile__(
 191         ".set\tnoreorder\n\t"
 192         ".set\tnoat\n"
 193         "1:\tlbu\t$1,-1(%1)\n\t"
 194         "addiu\t%1,%1,-1\n\t"
 195         "sb\t$1,-1(%0)\n\t"
 196         "addiu\t%2,%2,-1\n\t"
 197         "bne\t$0,%2,1b\n\t"
 198         "addiu\t%0,%0,-1\n\t"
 199         ".set\tat\n\t"
 200         ".set\treorder"
 201         : "=d" (dest), "=d" (src), "=d" (n)
 202         : "0" (dest+n), "1" (src+n), "2" (n)
 203         : "$1","memory" );
 204   return xdest;
 205 }
 206 
 207 #define __USE_PORTABLE_memcmp
 208 
 209 #endif /* _ASM_MIPS_STRING_H_ */
/* */
root/include/asm-mips/string.h

INCLUDED FROM

DEFINITIONS
