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
|
/*
* Some debug functions
*
* MIPS floating point support
*
* Copyright (C) 1994-2000 Algorithmics Ltd.
* http://www.algor.co.uk
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
* Nov 7, 2000
* Modified to build and operate in Linux kernel environment.
*
* Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
*/
#include <linux/kernel.h>
#include "ieee754.h"
#define DP_EBIAS 1023
#define DP_EMIN (-1022)
#define DP_EMAX 1023
#define DP_FBITS 52
#define SP_EBIAS 127
#define SP_EMIN (-126)
#define SP_EMAX 127
#define SP_FBITS 23
#define DP_MBIT(x) ((u64)1 << (x))
#define DP_HIDDEN_BIT DP_MBIT(DP_FBITS)
#define DP_SIGN_BIT DP_MBIT(63)
#define SP_MBIT(x) ((u32)1 << (x))
#define SP_HIDDEN_BIT SP_MBIT(SP_FBITS)
#define SP_SIGN_BIT SP_MBIT(31)
#define SPSIGN(sp) (sp.parts.sign)
#define SPBEXP(sp) (sp.parts.bexp)
#define SPMANT(sp) (sp.parts.mant)
#define DPSIGN(dp) (dp.parts.sign)
#define DPBEXP(dp) (dp.parts.bexp)
#define DPMANT(dp) (dp.parts.mant)
ieee754dp ieee754dp_dump(char *m, ieee754dp x)
{
int i;
printk("%s", m);
printk("<%08x,%08x>\n", (unsigned) (x.bits >> 32),
(unsigned) x.bits);
printk("\t=");
switch (ieee754dp_class(x)) {
case IEEE754_CLASS_QNAN:
case IEEE754_CLASS_SNAN:
printk("Nan %c", DPSIGN(x) ? '-' : '+');
for (i = DP_FBITS - 1; i >= 0; i--)
printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0');
break;
case IEEE754_CLASS_INF:
printk("%cInfinity", DPSIGN(x) ? '-' : '+');
break;
case IEEE754_CLASS_ZERO:
printk("%cZero", DPSIGN(x) ? '-' : '+');
break;
case IEEE754_CLASS_DNORM:
printk("%c0.", DPSIGN(x) ? '-' : '+');
for (i = DP_FBITS - 1; i >= 0; i--)
printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0');
printk("e%d", DPBEXP(x) - DP_EBIAS);
break;
case IEEE754_CLASS_NORM:
printk("%c1.", DPSIGN(x) ? '-' : '+');
for (i = DP_FBITS - 1; i >= 0; i--)
printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0');
printk("e%d", DPBEXP(x) - DP_EBIAS);
break;
default:
printk("Illegal/Unknown IEEE754 value class");
}
printk("\n");
return x;
}
ieee754sp ieee754sp_dump(char *m, ieee754sp x)
{
int i;
printk("%s=", m);
printk("<%08x>\n", (unsigned) x.bits);
printk("\t=");
switch (ieee754sp_class(x)) {
case IEEE754_CLASS_QNAN:
case IEEE754_CLASS_SNAN:
printk("Nan %c", SPSIGN(x) ? '-' : '+');
for (i = SP_FBITS - 1; i >= 0; i--)
printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0');
break;
case IEEE754_CLASS_INF:
printk("%cInfinity", SPSIGN(x) ? '-' : '+');
break;
case IEEE754_CLASS_ZERO:
printk("%cZero", SPSIGN(x) ? '-' : '+');
break;
case IEEE754_CLASS_DNORM:
printk("%c0.", SPSIGN(x) ? '-' : '+');
for (i = SP_FBITS - 1; i >= 0; i--)
printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0');
printk("e%d", SPBEXP(x) - SP_EBIAS);
break;
case IEEE754_CLASS_NORM:
printk("%c1.", SPSIGN(x) ? '-' : '+');
for (i = SP_FBITS - 1; i >= 0; i--)
printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0');
printk("e%d", SPBEXP(x) - SP_EBIAS);
break;
default:
printk("Illegal/Unknown IEEE754 value class");
}
printk("\n");
return x;
}
|
