Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6
[linux-2.6] / include / asm-mips / string.h
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
14 /*
15  * Most of the inline functions are rather naive implementations so I just
16  * didn't bother updating them for 64-bit ...
17  */
18 #ifdef CONFIG_32BIT
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 }
132 #endif /* CONFIG_32BIT */
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
143 #endif /* _ASM_STRING_H */