Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 */
19#ifdef CONFIG_MIPS32
20
21#ifndef IN_STRING_C
22
23#define __HAVE_ARCH_STRCPY
24static __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
46static __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
74static __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
104static __inline__ int
105strncmp(__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}
133#endif /* CONFIG_MIPS32 */
134
135#define __HAVE_ARCH_MEMSET
136extern void *memset(void *__s, int __c, size_t __count);
137
138#define __HAVE_ARCH_MEMCPY
139extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
140
141#define __HAVE_ARCH_MEMMOVE
142extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
143
144#ifdef CONFIG_MIPS32
145#define __HAVE_ARCH_MEMSCAN
146static __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}
164#endif /* CONFIG_MIPS32 */
165
166#endif /* _ASM_STRING_H */