make oldconfig will rebuild these...
[linux-2.4.21-pre4.git] / 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, 1995, 1996, 1997, 1998, 2001 Ralf Baechle
7  * Copyright (c) 2001 MIPS Technologies, Inc.
8  */
9 #ifndef __ASM_STRING_H
10 #define __ASM_STRING_H
11
12 #include <linux/config.h>
13
14 #define __HAVE_ARCH_STRCPY
15 extern __inline__ char *strcpy(char *__dest, __const__ char *__src)
16 {
17   char *__xdest = __dest;
18
19   __asm__ __volatile__(
20         ".set\tnoreorder\n\t"
21         ".set\tnoat\n"
22         "1:\tlbu\t$1,(%1)\n\t"
23         "addiu\t%1,1\n\t"
24         "sb\t$1,(%0)\n\t"
25         "bnez\t$1,1b\n\t"
26         "addiu\t%0,1\n\t"
27         ".set\tat\n\t"
28         ".set\treorder"
29         : "=r" (__dest), "=r" (__src)
30         : "0" (__dest), "1" (__src)
31         : "memory");
32
33   return __xdest;
34 }
35
36 #define __HAVE_ARCH_STRNCPY
37 extern __inline__ char *strncpy(char *__dest, __const__ char *__src, size_t __n)
38 {
39   char *__xdest = __dest;
40
41   if (__n == 0)
42     return __xdest;
43
44   __asm__ __volatile__(
45         ".set\tnoreorder\n\t"
46         ".set\tnoat\n"
47         "1:\tlbu\t$1,(%1)\n\t"
48         "subu\t%2,1\n\t"
49         "sb\t$1,(%0)\n\t"
50         "beqz\t$1,2f\n\t"
51         "addiu\t%0,1\n\t"
52         "bnez\t%2,1b\n\t"
53         "addiu\t%1,1\n"
54         "2:\n\t"
55         ".set\tat\n\t"
56         ".set\treorder"
57         : "=r" (__dest), "=r" (__src), "=r" (__n)
58         : "0" (__dest), "1" (__src), "2" (__n)
59         : "memory");
60
61   return __dest;
62 }
63
64 #define __HAVE_ARCH_STRCMP
65 extern __inline__ int strcmp(__const__ char *__cs, __const__ char *__ct)
66 {
67   int __res;
68
69   __asm__ __volatile__(
70         ".set\tnoreorder\n\t"
71         ".set\tnoat\n\t"
72         "lbu\t%2,(%0)\n"
73         "1:\tlbu\t$1,(%1)\n\t"
74         "addiu\t%0,1\n\t"
75         "bne\t$1,%2,2f\n\t"
76         "addiu\t%1,1\n\t"
77         "bnez\t%2,1b\n\t"
78         "lbu\t%2,(%0)\n\t"
79 #if defined(CONFIG_CPU_R3000)
80         "nop\n\t"
81 #endif
82         "move\t%2,$1\n"
83         "2:\tsubu\t%2,$1\n"
84         "3:\t.set\tat\n\t"
85         ".set\treorder"
86         : "=r" (__cs), "=r" (__ct), "=r" (__res)
87         : "0" (__cs), "1" (__ct));
88
89   return __res;
90 }
91
92 #define __HAVE_ARCH_STRNCMP
93 extern __inline__ int
94 strncmp(__const__ char *__cs, __const__ char *__ct, size_t __count)
95 {
96         int __res;
97
98         __asm__ __volatile__(
99         ".set\tnoreorder\n\t"
100         ".set\tnoat\n"
101         "1:\tlbu\t%3,(%0)\n\t"
102         "beqz\t%2,2f\n\t"
103         "lbu\t$1,(%1)\n\t"
104         "subu\t%2,1\n\t"
105         "bne\t$1,%3,3f\n\t"
106         "addiu\t%0,1\n\t"
107         "bnez\t%3,1b\n\t"
108         "addiu\t%1,1\n"
109         "2:\n\t"
110 #if defined(CONFIG_CPU_R3000)
111         "nop\n\t"
112 #endif
113         "move\t%3,$1\n"
114         "3:\tsubu\t%3,$1\n\t"
115         ".set\tat\n\t"
116         ".set\treorder"
117         : "=r" (__cs), "=r" (__ct), "=r" (__count), "=r" (__res)
118         : "0" (__cs), "1" (__ct), "2" (__count));
119
120         return __res;
121 }
122
123 #define __HAVE_ARCH_MEMSET
124 extern void *memset(void *__s, int __c, size_t __count);
125
126 #define __HAVE_ARCH_MEMCPY
127 extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
128
129 #define __HAVE_ARCH_MEMMOVE
130 extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
131
132 /* Don't build bcopy at all ...  */
133 #define __HAVE_ARCH_BCOPY
134
135 #define __HAVE_ARCH_MEMSCAN
136 extern __inline__ void *memscan(void *__addr, int __c, size_t __size)
137 {
138         char *__end = (char *)__addr + __size;
139         unsigned char __uc = (unsigned char) __c;
140
141         __asm__(".set\tpush\n\t"
142                 ".set\tnoat\n\t"
143                 ".set\treorder\n\t"
144                 "1:\tbeq\t%0,%1,2f\n\t"
145                 "addiu\t%0,1\n\t"
146                 "lbu\t$1,-1(%0)\n\t"
147                 "bne\t$1,%z4,1b\n"
148                 "2:\t.set\tpop"
149                 : "=r" (__addr), "=r" (__end)
150                 : "0" (__addr), "1" (__end), "Jr" (__uc));
151
152         return __addr;
153 }
154
155 #endif /* __ASM_STRING_H */