1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (c) 1994, 95, 96, 97, 98, 2000, 01 Ralf Baechle 7 * Copyright (c) 2000 by Silicon Graphics, Inc. 8 * Copyright (c) 2001 MIPS Technologies, Inc. 9 */ 10 #ifndef _ASM_STRING_H 11 #define _ASM_STRING_H 12 13 #if !defined(__OPTIMIZE__) || !defined(CONFIG_FORTIFY_SOURCE) 14 15 /* 16 * Most of the inline functions are rather naive implementations so I just 17 * didn't bother updating them for 64-bit ... 18 */ 19 #ifdef CONFIG_32BIT 20 21 #ifndef IN_STRING_C 22 23 #define __HAVE_ARCH_STRCPY 24 static __inline__ char *strcpy(char *__dest, __const__ char *__src) 25 { 26 char *__xdest = __dest; 27 28 __asm__ __volatile__( 29 ".set\tnoreorder\n\t" 30 ".set\tnoat\n" 31 "1:\tlbu\t$1,(%1)\n\t" 32 "addiu\t%1,1\n\t" 33 "sb\t$1,(%0)\n\t" 34 "bnez\t$1,1b\n\t" 35 "addiu\t%0,1\n\t" 36 ".set\tat\n\t" 37 ".set\treorder" 38 : "=r" (__dest), "=r" (__src) 39 : "0" (__dest), "1" (__src) 40 : "memory"); 41 42 return __xdest; 43 } 44 45 #define __HAVE_ARCH_STRNCPY 46 static __inline__ char *strncpy(char *__dest, __const__ char *__src, size_t __n) 47 { 48 char *__xdest = __dest; 49 50 if (__n == 0) 51 return __xdest; 52 53 __asm__ __volatile__( 54 ".set\tnoreorder\n\t" 55 ".set\tnoat\n" 56 "1:\tlbu\t$1,(%1)\n\t" 57 "subu\t%2,1\n\t" 58 "sb\t$1,(%0)\n\t" 59 "beqz\t$1,2f\n\t" 60 "addiu\t%0,1\n\t" 61 "bnez\t%2,1b\n\t" 62 "addiu\t%1,1\n" 63 "2:\n\t" 64 ".set\tat\n\t" 65 ".set\treorder" 66 : "=r" (__dest), "=r" (__src), "=r" (__n) 67 : "0" (__dest), "1" (__src), "2" (__n) 68 : "memory"); 69 70 return __xdest; 71 } 72 73 #define __HAVE_ARCH_STRCMP 74 static __inline__ int strcmp(__const__ char *__cs, __const__ char *__ct) 75 { 76 int __res; 77 78 __asm__ __volatile__( 79 ".set\tnoreorder\n\t" 80 ".set\tnoat\n\t" 81 "lbu\t%2,(%0)\n" 82 "1:\tlbu\t$1,(%1)\n\t" 83 "addiu\t%0,1\n\t" 84 "bne\t$1,%2,2f\n\t" 85 "addiu\t%1,1\n\t" 86 "bnez\t%2,1b\n\t" 87 "lbu\t%2,(%0)\n\t" 88 #if defined(CONFIG_CPU_R3000) 89 "nop\n\t" 90 #endif 91 "move\t%2,$1\n" 92 "2:\tsubu\t%2,$1\n" 93 "3:\t.set\tat\n\t" 94 ".set\treorder" 95 : "=r" (__cs), "=r" (__ct), "=r" (__res) 96 : "0" (__cs), "1" (__ct)); 97 98 return __res; 99 } 100 101 #endif /* !defined(IN_STRING_C) */ 102 103 #define __HAVE_ARCH_STRNCMP 104 static __inline__ int 105 strncmp(__const__ char *__cs, __const__ char *__ct, size_t __count) 106 { 107 int __res; 108 109 __asm__ __volatile__( 110 ".set\tnoreorder\n\t" 111 ".set\tnoat\n" 112 "1:\tlbu\t%3,(%0)\n\t" 113 "beqz\t%2,2f\n\t" 114 "lbu\t$1,(%1)\n\t" 115 "subu\t%2,1\n\t" 116 "bne\t$1,%3,3f\n\t" 117 "addiu\t%0,1\n\t" 118 "bnez\t%3,1b\n\t" 119 "addiu\t%1,1\n" 120 "2:\n\t" 121 #if defined(CONFIG_CPU_R3000) 122 "nop\n\t" 123 #endif 124 "move\t%3,$1\n" 125 "3:\tsubu\t%3,$1\n\t" 126 ".set\tat\n\t" 127 ".set\treorder" 128 : "=r" (__cs), "=r" (__ct), "=r" (__count), "=r" (__res) 129 : "0" (__cs), "1" (__ct), "2" (__count)); 130 131 return __res; 132 } 133 #endif /* CONFIG_32BIT */ 134 #endif /* !defined(__OPTIMIZE__) || !defined(CONFIG_FORTIFY_SOURCE) */ 135 136 #define __HAVE_ARCH_MEMSET 137 extern void *memset(void *__s, int __c, size_t __count); 138 139 #define __HAVE_ARCH_MEMCPY 140 extern void *memcpy(void *__to, __const__ void *__from, size_t __n); 141 142 #define __HAVE_ARCH_MEMMOVE 143 extern void *memmove(void *__dest, __const__ void *__src, size_t __n); 144 145 #endif /* _ASM_STRING_H */ 146