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
|
/* This file is part of the program psim.
Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
Copyright (C) 1997, Free Software Foundation, Inc.
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 N
#error "N must be #defined"
#endif
/* NOTE: See end of file for #undef */
#define unsignedN XCONCAT2(unsigned,N)
#define signedN XCONCAT2(signed,N)
#define MASKEDn XCONCAT2(MASKED,N)
#define MASKn XCONCAT2(MASK,N)
#define LSMASKEDn XCONCAT2(LSMASKED,N)
#define EXTRACTEDn XCONCAT2(EXTRACTED,N)
#define INSERTEDn XCONCAT2(INSERTED,N)
#define ROTn XCONCAT2(ROT,N)
#define ROTLn XCONCAT2(ROTL,N)
#define ROTRn XCONCAT2(ROTR,N)
#define SEXTn XCONCAT2(SEXT,N)
INLINE_SIM_BITS\
(unsignedN)
MASKEDn(unsignedN word,
unsigned start,
unsigned stop)
{
return (word & MASKn(start, stop));
}
INLINE_SIM_BITS\
(unsignedN)
LSMASKEDn(unsignedN word,
unsigned nr_bits)
{
return (word & MASKn(N - nr_bits, N - 1));
}
INLINE_SIM_BITS\
(unsignedN)
EXTRACTEDn(unsignedN val,
unsigned start,
unsigned stop)
{
return LSMASKEDn((((unsignedN)(val)) >> (N - stop - 1)),
stop - start + 1);
}
INLINE_SIM_BITS\
(unsignedN)
INSERTEDn(unsignedN val,
unsigned start,
unsigned stop)
{
return (((unsignedN)(val)
<< _MAKE_SHIFT(N, stop))
& MASKn(start, stop));
}
INLINE_SIM_BITS\
(unsignedN)
ROTn(unsignedN val,
int shift)
{
unsignedN result;
if (shift > 0)
return ROTRn(val, shift);
else if (shift < 0)
return ROTLn(val, -shift);
else
return val;
}
INLINE_SIM_BITS\
(unsignedN)
ROTLn(unsignedN val,
unsigned shift)
{
unsignedN result;
ASSERT(shift <= N);
result = (((val) << (shift)) | ((val) >> ((N)-(shift))));
return result;
}
INLINE_SIM_BITS\
(unsignedN)
ROTRn(unsignedN val,
unsigned shift)
{
unsignedN result;
ASSERT(shift <= N);
result = (((val) >> (shift)) | ((val) << ((N)-(shift))));
return result;
}
INLINE_SIM_BITS\
(unsignedN)
SEXTn(signedN val,
unsigned sign_bit)
{
/* make the sign-bit most significant and then smear it back into
position */
ASSERT(sign_bit < N);
return (val << sign_bit) >> sign_bit;
}
/* NOTE: See start of file for #define */
#undef SEXTn
#undef ROTLn
#undef ROTRn
#undef ROTn
#undef INSERTEDn
#undef EXTRACTEDn
#undef LSMASKEDn
#undef MASKn
#undef MASKEDn
#undef signedN
#undef unsignedN
|
