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wdenk6069ff22003-02-28 00:49:47 +00001/* $Id: string.h,v 1.13 2000/02/19 14:12:14 harald Exp $
2 *
3 * This file is subject to the terms and conditions of the GNU General Public
4 * License. See the file "COPYING" in the main directory of this archive
5 * for more details.
6 *
7 * Copyright (c) 1994, 1995, 1996, 1997, 1998 by Ralf Baechle
8 */
9#ifndef __ASM_MIPS_STRING_H
10#define __ASM_MIPS_STRING_H
11
12#include <linux/config.h>
13
14#define __HAVE_ARCH_STRCPY
15extern __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)
wdenk8bde7f72003-06-27 21:31:46 +000030 : "0" (__dest), "1" (__src)
wdenk6069ff22003-02-28 00:49:47 +000031 : "$1","memory");
32
33 return __xdest;
34}
35
36#define __HAVE_ARCH_STRNCPY
37extern __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"
wdenk8bde7f72003-06-27 21:31:46 +000057 : "=r" (__dest), "=r" (__src), "=r" (__n)
58 : "0" (__dest), "1" (__src), "2" (__n)
59 : "$1","memory");
wdenk6069ff22003-02-28 00:49:47 +000060
61 return __dest;
62}
63
64#define __HAVE_ARCH_STRCMP
65extern __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 : "$1");
89
90 return __res;
91}
92
93#define __HAVE_ARCH_STRNCMP
94extern __inline__ int
95strncmp(__const__ char *__cs, __const__ char *__ct, size_t __count)
96{
97 int __res;
98
99 __asm__ __volatile__(
100 ".set\tnoreorder\n\t"
101 ".set\tnoat\n"
102 "1:\tlbu\t%3,(%0)\n\t"
103 "beqz\t%2,2f\n\t"
104 "lbu\t$1,(%1)\n\t"
105 "subu\t%2,1\n\t"
106 "bne\t$1,%3,3f\n\t"
107 "addiu\t%0,1\n\t"
108 "bnez\t%3,1b\n\t"
109 "addiu\t%1,1\n"
110 "2:\n\t"
111#if defined(CONFIG_CPU_R3000)
112 "nop\n\t"
wdenk8bde7f72003-06-27 21:31:46 +0000113#endif
wdenk6069ff22003-02-28 00:49:47 +0000114 "move\t%3,$1\n"
115 "3:\tsubu\t%3,$1\n\t"
116 ".set\tat\n\t"
117 ".set\treorder"
118 : "=r" (__cs), "=r" (__ct), "=r" (__count), "=r" (__res)
119 : "0" (__cs), "1" (__ct), "2" (__count)
120 : "$1");
121
122 return __res;
123}
124
125#undef __HAVE_ARCH_MEMSET
126extern void *memset(void *__s, int __c, size_t __count);
127
128#undef __HAVE_ARCH_MEMCPY
129extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
130
131#undef __HAVE_ARCH_MEMMOVE
132extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
133
134/* Don't build bcopy at all ... */
135#define __HAVE_ARCH_BCOPY
136
137#define __HAVE_ARCH_MEMSCAN
138extern __inline__ void *memscan(void *__addr, int __c, size_t __size)
139{
140 char *__end = (char *)__addr + __size;
141
142 __asm__(".set\tpush\n\t"
143 ".set\tnoat\n\t"
144 ".set\treorder\n\t"
145 "1:\tbeq\t%0,%1,2f\n\t"
146 "addiu\t%0,1\n\t"
147 "lb\t$1,-1(%0)\n\t"
148 "bne\t$1,%4,1b\n"
149 "2:\t.set\tpop"
150 : "=r" (__addr), "=r" (__end)
151 : "0" (__addr), "1" (__end), "r" (__c)
152 : "$1");
153
154 return __addr;
155}
156
157#endif /* __ASM_MIPS_STRING_H */