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
144
145
146
|
/* $Id$
*
* 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) 1996, 1999 by Ralf Baechle
* Copyright (C) 1999 Silicon Graphics, Inc.
*/
#ifndef _ASM_UNALIGNED_H
#define _ASM_UNALIGNED_H
extern void __get_unaligned_bad_length(void);
extern void __put_unaligned_bad_length(void);
/*
* Load quad unaligned.
*/
extern __inline__ unsigned long ldq_u(const unsigned long long * __addr)
{
unsigned long long __res;
__asm__("uld\t%0,(%1)"
:"=&r" (__res)
:"r" (__addr));
return __res;
}
/*
* Load long unaligned.
*/
extern __inline__ unsigned long ldl_u(const unsigned int * __addr)
{
unsigned long __res;
__asm__("ulw\t%0,(%1)"
:"=&r" (__res)
:"r" (__addr));
return __res;
}
/*
* Load word unaligned.
*/
extern __inline__ unsigned long ldw_u(const unsigned short * __addr)
{
unsigned long __res;
__asm__("ulh\t%0,(%1)"
:"=&r" (__res)
:"r" (__addr));
return __res;
}
/*
* Store quad ununaligned.
*/
extern __inline__ void stq_u(unsigned long __val, unsigned long long * __addr)
{
__asm__ __volatile__(
"usd\t%0,(%1)"
: /* No results */
:"r" (__val),
"r" (__addr));
}
/*
* Store long ununaligned.
*/
extern __inline__ void stl_u(unsigned long __val, unsigned int * __addr)
{
__asm__ __volatile__(
"usw\t%0,(%1)"
: /* No results */
:"r" (__val),
"r" (__addr));
}
/*
* Store word ununaligned.
*/
extern __inline__ void stw_u(unsigned long __val, unsigned short * __addr)
{
__asm__ __volatile__(
"ush\t%0,(%1)"
: /* No results */
:"r" (__val),
"r" (__addr));
}
extern inline unsigned long __get_unaligned(const void *ptr, size_t size)
{
unsigned long val;
switch (size) {
case 1:
val = *(const unsigned char *)ptr;
break;
case 2:
val = ldw_u((const unsigned short *)ptr);
break;
case 4:
val = ldl_u((const unsigned int *)ptr);
break;
case 8:
val = ldq_u((const unsigned long long *)ptr);
break;
default:
__get_unaligned_bad_length();
break;
}
return val;
}
extern inline void __put_unaligned(unsigned long val, void *ptr, size_t size)
{
switch (size) {
case 1:
*(unsigned char *)ptr = (val);
break;
case 2:
stw_u(val, (unsigned short *)ptr);
break;
case 4:
stl_u(val, (unsigned int *)ptr);
break;
case 8:
stq_u(val, (unsigned long long *)ptr);
break;
default:
__put_unaligned_bad_length();
break;
}
}
/*
* The main single-value unaligned transfer routines.
*/
#define get_unaligned(ptr) \
((__typeof__(*(ptr)))__get_unaligned((ptr), sizeof(*(ptr))))
#define put_unaligned(x,ptr) \
__put_unaligned((unsigned long)(x), (ptr), sizeof(*(ptr)))
#endif /* _ASM_UNALIGNED_H */
|
