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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 | ||
1da177e4 LT |
13 | |
14 | /* | |
15 | * Most of the inline functions are rather naive implementations so I just | |
16 | * didn't bother updating them for 64-bit ... | |
17 | */ | |
875d43e7 | 18 | #ifdef CONFIG_32BIT |
1da177e4 LT |
19 | |
20 | #ifndef IN_STRING_C | |
21 | ||
22 | #define __HAVE_ARCH_STRCPY | |
23 | static __inline__ char *strcpy(char *__dest, __const__ char *__src) | |
24 | { | |
25 | char *__xdest = __dest; | |
26 | ||
27 | __asm__ __volatile__( | |
28 | ".set\tnoreorder\n\t" | |
29 | ".set\tnoat\n" | |
30 | "1:\tlbu\t$1,(%1)\n\t" | |
31 | "addiu\t%1,1\n\t" | |
32 | "sb\t$1,(%0)\n\t" | |
33 | "bnez\t$1,1b\n\t" | |
34 | "addiu\t%0,1\n\t" | |
35 | ".set\tat\n\t" | |
36 | ".set\treorder" | |
37 | : "=r" (__dest), "=r" (__src) | |
38 | : "0" (__dest), "1" (__src) | |
39 | : "memory"); | |
40 | ||
41 | return __xdest; | |
42 | } | |
43 | ||
44 | #define __HAVE_ARCH_STRNCPY | |
45 | static __inline__ char *strncpy(char *__dest, __const__ char *__src, size_t __n) | |
46 | { | |
47 | char *__xdest = __dest; | |
48 | ||
49 | if (__n == 0) | |
50 | return __xdest; | |
51 | ||
52 | __asm__ __volatile__( | |
53 | ".set\tnoreorder\n\t" | |
54 | ".set\tnoat\n" | |
55 | "1:\tlbu\t$1,(%1)\n\t" | |
56 | "subu\t%2,1\n\t" | |
57 | "sb\t$1,(%0)\n\t" | |
58 | "beqz\t$1,2f\n\t" | |
59 | "addiu\t%0,1\n\t" | |
60 | "bnez\t%2,1b\n\t" | |
61 | "addiu\t%1,1\n" | |
62 | "2:\n\t" | |
63 | ".set\tat\n\t" | |
64 | ".set\treorder" | |
65 | : "=r" (__dest), "=r" (__src), "=r" (__n) | |
66 | : "0" (__dest), "1" (__src), "2" (__n) | |
67 | : "memory"); | |
68 | ||
69 | return __xdest; | |
70 | } | |
71 | ||
72 | #define __HAVE_ARCH_STRCMP | |
73 | static __inline__ int strcmp(__const__ char *__cs, __const__ char *__ct) | |
74 | { | |
75 | int __res; | |
76 | ||
77 | __asm__ __volatile__( | |
78 | ".set\tnoreorder\n\t" | |
79 | ".set\tnoat\n\t" | |
80 | "lbu\t%2,(%0)\n" | |
81 | "1:\tlbu\t$1,(%1)\n\t" | |
82 | "addiu\t%0,1\n\t" | |
83 | "bne\t$1,%2,2f\n\t" | |
84 | "addiu\t%1,1\n\t" | |
85 | "bnez\t%2,1b\n\t" | |
86 | "lbu\t%2,(%0)\n\t" | |
87 | #if defined(CONFIG_CPU_R3000) | |
88 | "nop\n\t" | |
89 | #endif | |
90 | "move\t%2,$1\n" | |
91 | "2:\tsubu\t%2,$1\n" | |
92 | "3:\t.set\tat\n\t" | |
93 | ".set\treorder" | |
94 | : "=r" (__cs), "=r" (__ct), "=r" (__res) | |
95 | : "0" (__cs), "1" (__ct)); | |
96 | ||
97 | return __res; | |
98 | } | |
99 | ||
100 | #endif /* !defined(IN_STRING_C) */ | |
101 | ||
102 | #define __HAVE_ARCH_STRNCMP | |
103 | static __inline__ int | |
104 | strncmp(__const__ char *__cs, __const__ char *__ct, size_t __count) | |
105 | { | |
106 | int __res; | |
107 | ||
108 | __asm__ __volatile__( | |
109 | ".set\tnoreorder\n\t" | |
110 | ".set\tnoat\n" | |
111 | "1:\tlbu\t%3,(%0)\n\t" | |
112 | "beqz\t%2,2f\n\t" | |
113 | "lbu\t$1,(%1)\n\t" | |
114 | "subu\t%2,1\n\t" | |
115 | "bne\t$1,%3,3f\n\t" | |
116 | "addiu\t%0,1\n\t" | |
117 | "bnez\t%3,1b\n\t" | |
118 | "addiu\t%1,1\n" | |
119 | "2:\n\t" | |
120 | #if defined(CONFIG_CPU_R3000) | |
121 | "nop\n\t" | |
122 | #endif | |
123 | "move\t%3,$1\n" | |
124 | "3:\tsubu\t%3,$1\n\t" | |
125 | ".set\tat\n\t" | |
126 | ".set\treorder" | |
127 | : "=r" (__cs), "=r" (__ct), "=r" (__count), "=r" (__res) | |
128 | : "0" (__cs), "1" (__ct), "2" (__count)); | |
129 | ||
130 | return __res; | |
131 | } | |
875d43e7 | 132 | #endif /* CONFIG_32BIT */ |
1da177e4 LT |
133 | |
134 | #define __HAVE_ARCH_MEMSET | |
135 | extern void *memset(void *__s, int __c, size_t __count); | |
136 | ||
137 | #define __HAVE_ARCH_MEMCPY | |
138 | extern void *memcpy(void *__to, __const__ void *__from, size_t __n); | |
139 | ||
140 | #define __HAVE_ARCH_MEMMOVE | |
141 | extern void *memmove(void *__dest, __const__ void *__src, size_t __n); | |
142 | ||
1da177e4 | 143 | #endif /* _ASM_STRING_H */ |