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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/* This file is part of the program psim.
Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _SIM_BITS_C_
#define _SIM_BITS_C_
#include "sim-basics.h"
#include "sim-assert.h"
#include "sim-io.h"
INLINE_SIM_BITS\
(unsigned_word)
LSMASKED (unsigned_word val,
int start,
int stop)
{
/* NOTE - start, stop can wrap */
val &= LSMASK (start, stop);
return val;
}
INLINE_SIM_BITS\
(unsigned_word)
MSMASKED (unsigned_word val,
int start,
int stop)
{
/* NOTE - start, stop can wrap */
val &= MSMASK (start, stop);
return val;
}
INLINE_SIM_BITS\
(unsigned_word)
LSEXTRACTED (unsigned_word val,
int start,
int stop)
{
ASSERT (start >= stop);
#if (WITH_TARGET_WORD_BITSIZE == 64)
return LSEXTRACTED64 (val, start, stop);
#endif
#if (WITH_TARGET_WORD_BITSIZE == 32)
if (stop >= 32)
return 0;
else
{
if (start < 32)
val &= LSMASK (start, 0);
val >>= stop;
return val;
}
#endif
}
INLINE_SIM_BITS\
(unsigned_word)
MSEXTRACTED (unsigned_word val,
int start,
int stop)
{
ASSERT (start <= stop);
#if (WITH_TARGET_WORD_BITSIZE == 64)
return MSEXTRACTED64 (val, start, stop);
#endif
#if (WITH_TARGET_WORD_BITSIZE == 32)
if (stop < 32)
return 0;
else
{
if (start >= 32)
val &= MSMASK (start, 64 - 1);
val >>= (64 - stop - 1);
return val;
}
#endif
}
INLINE_SIM_BITS\
(unsigned_word)
INSERTED (unsigned_word val,
int start,
int stop)
{
ASSERT ((WITH_TARGET_WORD_MSB == 0 && start <= stop)
|| (WITH_TARGET_WORD_MSB != 0 && start >= stop));
#if (WITH_TARGET_WORD_BITSIZE == 64)
return INSERTED64 (val, start, stop);
#endif
#if (WITH_TARGET_WORD_BITSIZE == 32)
/* Bit numbers are 0..63, even for 32 bit targets.
On 32 bit targets we ignore 0..31. */
if (_LSB_SHIFT (64, stop) >= 32)
return 0;
else
{
val &= LSMASK (_MAKE_WIDTH (start, stop), 0);
val <<= _LSB_SHIFT (64, stop);
return val;
}
#endif
}
INLINE_SIM_BITS\
(unsigned_word)
SEXT (signed_word val,
int sign_bit)
{
/* make the sign-bit most significant and then smear it back into
position */
ASSERT (sign_bit < 64);
#if (WITH_TARGET_WORD_BITSIZE == 64)
return SEXT64 (val, sign_bit);
#endif
#if (WITH_TARGET_WORD_BITSIZE == 32)
if (_MSB_SHIFT (64, sign_bit) < 32)
return val;
else {
val <<= (_MSB_SHIFT (64, sign_bit) - 32);
val >>= (_MSB_SHIFT (64, sign_bit) - 32);
return val;
}
#endif
}
#define N 16
#include "sim-n-bits.h"
#undef N
#define N 32
#include "sim-n-bits.h"
#undef N
#define N 64
#include "sim-n-bits.h"
#undef N
#endif /* _SIM_BITS_C_ */
|
