Home Home > GIT Browse
summaryrefslogtreecommitdiff
blob: 436e3ad352d95e78d8d9a24d72043fee0c087366 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (c) 1994, 95, 96, 97, 98, 2000, 01 Ralf Baechle
 * Copyright (c) 2000 by Silicon Graphics, Inc.
 * Copyright (c) 2001 MIPS Technologies, Inc.
 */
#ifndef _ASM_STRING_H
#define _ASM_STRING_H


/*
 * Most of the inline functions are rather naive implementations so I just
 * didn't bother updating them for 64-bit ...
 */
#ifdef CONFIG_32BIT

#ifndef IN_STRING_C

#define __HAVE_ARCH_STRCPY
static __inline__ char *strcpy(char *__dest, __const__ char *__src)
{
  char *__xdest = __dest;

  __asm__ __volatile__(
	".set\tnoreorder\n\t"
	".set\tnoat\n"
	"1:\tlbu\t$1,(%1)\n\t"
	"addiu\t%1,1\n\t"
	"sb\t$1,(%0)\n\t"
	"bnez\t$1,1b\n\t"
	"addiu\t%0,1\n\t"
	".set\tat\n\t"
	".set\treorder"
	: "=r" (__dest), "=r" (__src)
        : "0" (__dest), "1" (__src)
	: "memory");

  return __xdest;
}

#define __HAVE_ARCH_STRNCPY
static __inline__ char *strncpy(char *__dest, __const__ char *__src, size_t __n)
{
  char *__xdest = __dest;

  if (__n == 0)
    return __xdest;

  __asm__ __volatile__(
	".set\tnoreorder\n\t"
	".set\tnoat\n"
	"1:\tlbu\t$1,(%1)\n\t"
	"subu\t%2,1\n\t"
	"sb\t$1,(%0)\n\t"
	"beqz\t$1,2f\n\t"
	"addiu\t%0,1\n\t"
	"bnez\t%2,1b\n\t"
	"addiu\t%1,1\n"
	"2:\n\t"
	".set\tat\n\t"
	".set\treorder"
        : "=r" (__dest), "=r" (__src), "=r" (__n)
        : "0" (__dest), "1" (__src), "2" (__n)
        : "memory");

  return __xdest;
}

#define __HAVE_ARCH_STRCMP
static __inline__ int strcmp(__const__ char *__cs, __const__ char *__ct)
{
  int __res;

  __asm__ __volatile__(
	".set\tnoreorder\n\t"
	".set\tnoat\n\t"
	"lbu\t%2,(%0)\n"
	"1:\tlbu\t$1,(%1)\n\t"
	"addiu\t%0,1\n\t"
	"bne\t$1,%2,2f\n\t"
	"addiu\t%1,1\n\t"
	"bnez\t%2,1b\n\t"
	"lbu\t%2,(%0)\n\t"
#if defined(CONFIG_CPU_R3000)
	"nop\n\t"
#endif
	"move\t%2,$1\n"
	"2:\tsubu\t%2,$1\n"
	"3:\t.set\tat\n\t"
	".set\treorder"
	: "=r" (__cs), "=r" (__ct), "=r" (__res)
	: "0" (__cs), "1" (__ct));

  return __res;
}

#endif /* !defined(IN_STRING_C) */

#define __HAVE_ARCH_STRNCMP
static __inline__ int
strncmp(__const__ char *__cs, __const__ char *__ct, size_t __count)
{
	int __res;

	__asm__ __volatile__(
	".set\tnoreorder\n\t"
	".set\tnoat\n"
	"1:\tlbu\t%3,(%0)\n\t"
	"beqz\t%2,2f\n\t"
	"lbu\t$1,(%1)\n\t"
	"subu\t%2,1\n\t"
	"bne\t$1,%3,3f\n\t"
	"addiu\t%0,1\n\t"
	"bnez\t%3,1b\n\t"
	"addiu\t%1,1\n"
	"2:\n\t"
#if defined(CONFIG_CPU_R3000)
	"nop\n\t"
#endif
	"move\t%3,$1\n"
	"3:\tsubu\t%3,$1\n\t"
	".set\tat\n\t"
	".set\treorder"
	: "=r" (__cs), "=r" (__ct), "=r" (__count), "=r" (__res)
	: "0" (__cs), "1" (__ct), "2" (__count));

	return __res;
}
#endif /* CONFIG_32BIT */

#define __HAVE_ARCH_MEMSET
extern void *memset(void *__s, int __c, size_t __count);

#define __HAVE_ARCH_MEMCPY
extern void *memcpy(void *__to, __const__ void *__from, size_t __n);

#define __HAVE_ARCH_MEMMOVE
extern void *memmove(void *__dest, __const__ void *__src, size_t __n);

#endif /* _ASM_STRING_H */