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1da177e4 LT |
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 | #include <linux/config.h> | |
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 | */ | |
875d43e7 | 19 | #ifdef CONFIG_32BIT |
1da177e4 LT |
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 | } | |
875d43e7 | 133 | #endif /* CONFIG_32BIT */ |
1da177e4 LT |
134 | |
135 | #define __HAVE_ARCH_MEMSET | |
136 | extern void *memset(void *__s, int __c, size_t __count); | |
137 | ||
138 | #define __HAVE_ARCH_MEMCPY | |
139 | extern void *memcpy(void *__to, __const__ void *__from, size_t __n); | |
140 | ||
141 | #define __HAVE_ARCH_MEMMOVE | |
142 | extern void *memmove(void *__dest, __const__ void *__src, size_t __n); | |
143 | ||
875d43e7 | 144 | #ifdef CONFIG_32BIT |
1da177e4 LT |
145 | #define __HAVE_ARCH_MEMSCAN |
146 | static __inline__ void *memscan(void *__addr, int __c, size_t __size) | |
147 | { | |
148 | char *__end = (char *)__addr + __size; | |
149 | unsigned char __uc = (unsigned char) __c; | |
150 | ||
151 | __asm__(".set\tpush\n\t" | |
152 | ".set\tnoat\n\t" | |
153 | ".set\treorder\n\t" | |
154 | "1:\tbeq\t%0,%1,2f\n\t" | |
155 | "addiu\t%0,1\n\t" | |
156 | "lbu\t$1,-1(%0)\n\t" | |
157 | "bne\t$1,%z4,1b\n" | |
158 | "2:\t.set\tpop" | |
159 | : "=r" (__addr), "=r" (__end) | |
160 | : "0" (__addr), "1" (__end), "Jr" (__uc)); | |
161 | ||
162 | return __addr; | |
163 | } | |
875d43e7 | 164 | #endif /* CONFIG_32BIT */ |
1da177e4 LT |
165 | |
166 | #endif /* _ASM_STRING_H */ |