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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 | /* * include/asm-mips/string.h * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (c) 1994, 1995 Waldorf Electronics * written by Ralf Baechle */ #ifndef __ASM_MIPS_STRING_H #define __ASM_MIPS_STRING_H #define __HAVE_ARCH_STRCPY extern __inline__ char * strcpy(char * dest, const char *src) { char *xdest = dest; __asm__ __volatile__( ".set\tnoreorder\n\t" ".set\tnoat\n" "1:\tlbu\t$1,(%1)\n\t" "addiu\t%1,1\n\t" "sb\t$1,(%0)\n\t" "bnez\t$1,1b\n\t" "addiu\t%0,1\n\t" ".set\tat\n\t" ".set\treorder" : "=r" (dest), "=r" (src) : "0" (dest), "1" (src) : "$1","memory"); return xdest; } #define __HAVE_ARCH_STRNCPY extern __inline__ char * strncpy(char *dest, const char *src, size_t n) { char *xdest = dest; if (n == 0) return xdest; __asm__ __volatile__( ".set\tnoreorder\n\t" ".set\tnoat\n" "1:\tlbu\t$1,(%1)\n\t" "subu\t%2,%2,1\n\t" "sb\t$1,(%0)\n\t" "beqz\t$1,2f\n\t" "addiu\t%0,%0,1\n\t" "bnez\t%2,1b\n\t" "addiu\t%1,%1,1\n" "2:\n\t" ".set\tat\n\t" ".set\treorder\n\t" : "=r" (dest), "=r" (src), "=r" (n) : "0" (dest), "1" (src), "2" (n) : "$1","memory"); return dest; } #define __HAVE_ARCH_STRCMP extern __inline__ int strcmp(const char * cs, const char * ct) { int __res; __asm__ __volatile__( ".set\tnoreorder\n\t" ".set\tnoat\n\t" "lbu\t%2,(%0)\n" "1:\tlbu\t$1,(%1)\n\t" "addiu\t%0,1\n\t" "bne\t$1,%2,2f\n\t" "addiu\t%1,1\n\t" "bnez\t%2,1b\n\t" "lbu\t%2,(%0)\n\t" #ifndef __R4000__ "nop\n\t" #endif "move\t%2,$1\n" "2:\tsubu\t%2,$1\n" "3:\t.set\tat\n\t" ".set\treorder" : "=d" (cs), "=d" (ct), "=d" (__res) : "0" (cs), "1" (ct) : "$1"); return __res; } #define __HAVE_ARCH_STRNCMP extern __inline__ int strncmp(const char * cs, const char * ct, size_t count) { char __res; __asm__ __volatile__( ".set\tnoreorder\n\t" ".set\tnoat\n" "1:\tlbu\t%3,(%0)\n\t" "beqz\t%2,2f\n\t" "lbu\t$1,(%1)\n\t" "subu\t%2,1\n\t" "bne\t$1,%3,3f\n\t" "addiu\t%0,1\n\t" "bnez\t%3,1b\n\t" "addiu\t%1,1\n" "2:\tmove\t%3,$1\n" "3:\tsubu\t%3,$1\n\t" ".set\tat\n\t" ".set\treorder" : "=d" (cs), "=d" (ct), "=d" (count), "=d" (__res) : "0" (cs), "1" (ct), "2" (count) : "$1"); return __res; } #define __HAVE_ARCH_MEMSET extern __inline__ void * memset(void * s, int c, size_t count) { void *xs = s; if (!count) return xs; __asm__ __volatile__( ".set\tnoreorder\n" "1:\tsb\t%3,(%0)\n\t" "bne\t%0,%1,1b\n\t" "addiu\t%0,%0,1\n\t" ".set\treorder" : "=r" (s), "=r" (count) : "0" (s), "r" (c), "1" (s + count - 1) : "memory"); return xs; } #define __HAVE_ARCH_MEMCPY extern __inline__ void * memcpy(void * to, const void * from, size_t n) { void *xto = to; if (!n) return xto; __asm__ __volatile__( ".set\tnoreorder\n\t" ".set\tnoat\n" "1:\tlbu\t$1,(%1)\n\t" "addiu\t%1,1\n\t" "sb\t$1,(%0)\n\t" "subu\t%2,1\n\t" "bnez\t%2,1b\n\t" "addiu\t%0,1\n\t" ".set\tat\n\t" ".set\treorder" : "=r" (to), "=r" (from), "=r" (n) : "0" (to), "1" (from), "2" (n) : "$1","memory" ); return xto; } #define __HAVE_ARCH_MEMMOVE extern __inline__ void * memmove(void * dest,const void * src, size_t n) { void *xdest = dest; if (!n) return xdest; if (dest < src) __asm__ __volatile__( ".set\tnoreorder\n\t" ".set\tnoat\n" "1:\tlbu\t$1,(%1)\n\t" "addiu\t%1,1\n\t" "sb\t$1,(%0)\n\t" "subu\t%2,1\n\t" "bnez\t%2,1b\n\t" "addiu\t%0,1\n\t" ".set\tat\n\t" ".set\treorder" : "=r" (dest), "=r" (src), "=r" (n) : "0" (dest), "1" (src), "2" (n) : "$1","memory" ); else __asm__ __volatile__( ".set\tnoreorder\n\t" ".set\tnoat\n" "1:\tlbu\t$1,-1(%1)\n\t" "subu\t%1,1\n\t" "sb\t$1,-1(%0)\n\t" "subu\t%2,1\n\t" "bnez\t%2,1b\n\t" "subu\t%0,1\n\t" ".set\tat\n\t" ".set\treorder" : "=r" (dest), "=r" (src), "=r" (n) : "0" (dest+n), "1" (src+n), "2" (n) : "$1","memory" ); return xdest; } #define __HAVE_ARCH_MEMSCAN extern __inline__ void * memscan(void * addr, int c, size_t size) { if (!size) return addr; __asm__(".set\tnoreorder\n\t" ".set\tnoat\n" "1:\tbeqz\t%1,2f\n\t" "lbu\t$1,(%0)\n\t" "subu\t%1,1\n\t" "bnez\t%1,1b\n\t" "addiu\t%0,1\n\t" ".set\tat\n\t" ".set\treorder\n" "2:" : "=r" (addr), "=r" (size) : "0" (addr), "1" (size), "r" (c) : "$1"); return addr; } #endif /* __ASM_MIPS_STRING_H */ |