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