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1da177e4 LT |
1 | /* |
2 | * Some debug functions | |
3 | * | |
4 | * MIPS floating point support | |
5 | * | |
6 | * Copyright (C) 1994-2000 Algorithmics Ltd. | |
7 | * http://www.algor.co.uk | |
8 | * | |
9 | * This program is free software; you can distribute it and/or modify it | |
10 | * under the terms of the GNU General Public License (Version 2) as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope it will be useful, but WITHOUT | |
14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | * for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
21 | * | |
22 | * Nov 7, 2000 | |
23 | * Modified to build and operate in Linux kernel environment. | |
24 | * | |
25 | * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com | |
26 | * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved. | |
27 | */ | |
28 | ||
29 | #include <linux/kernel.h> | |
30 | #include "ieee754.h" | |
31 | ||
32 | #define DP_EBIAS 1023 | |
33 | #define DP_EMIN (-1022) | |
34 | #define DP_EMAX 1023 | |
35 | #define DP_FBITS 52 | |
36 | ||
37 | #define SP_EBIAS 127 | |
38 | #define SP_EMIN (-126) | |
39 | #define SP_EMAX 127 | |
40 | #define SP_FBITS 23 | |
41 | ||
42 | #define DP_MBIT(x) ((u64)1 << (x)) | |
43 | #define DP_HIDDEN_BIT DP_MBIT(DP_FBITS) | |
44 | #define DP_SIGN_BIT DP_MBIT(63) | |
45 | ||
46 | ||
47 | #define SP_MBIT(x) ((u32)1 << (x)) | |
48 | #define SP_HIDDEN_BIT SP_MBIT(SP_FBITS) | |
49 | #define SP_SIGN_BIT SP_MBIT(31) | |
50 | ||
51 | ||
52 | #define SPSIGN(sp) (sp.parts.sign) | |
53 | #define SPBEXP(sp) (sp.parts.bexp) | |
54 | #define SPMANT(sp) (sp.parts.mant) | |
55 | ||
56 | #define DPSIGN(dp) (dp.parts.sign) | |
57 | #define DPBEXP(dp) (dp.parts.bexp) | |
58 | #define DPMANT(dp) (dp.parts.mant) | |
59 | ||
60 | ieee754dp ieee754dp_dump(char *m, ieee754dp x) | |
61 | { | |
62 | int i; | |
63 | ||
64 | printk("%s", m); | |
65 | printk("<%08x,%08x>\n", (unsigned) (x.bits >> 32), | |
66 | (unsigned) x.bits); | |
67 | printk("\t="); | |
68 | switch (ieee754dp_class(x)) { | |
69 | case IEEE754_CLASS_QNAN: | |
70 | case IEEE754_CLASS_SNAN: | |
71 | printk("Nan %c", DPSIGN(x) ? '-' : '+'); | |
72 | for (i = DP_FBITS - 1; i >= 0; i--) | |
73 | printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0'); | |
74 | break; | |
75 | case IEEE754_CLASS_INF: | |
76 | printk("%cInfinity", DPSIGN(x) ? '-' : '+'); | |
77 | break; | |
78 | case IEEE754_CLASS_ZERO: | |
79 | printk("%cZero", DPSIGN(x) ? '-' : '+'); | |
80 | break; | |
81 | case IEEE754_CLASS_DNORM: | |
82 | printk("%c0.", DPSIGN(x) ? '-' : '+'); | |
83 | for (i = DP_FBITS - 1; i >= 0; i--) | |
84 | printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0'); | |
85 | printk("e%d", DPBEXP(x) - DP_EBIAS); | |
86 | break; | |
87 | case IEEE754_CLASS_NORM: | |
88 | printk("%c1.", DPSIGN(x) ? '-' : '+'); | |
89 | for (i = DP_FBITS - 1; i >= 0; i--) | |
90 | printk("%c", DPMANT(x) & DP_MBIT(i) ? '1' : '0'); | |
91 | printk("e%d", DPBEXP(x) - DP_EBIAS); | |
92 | break; | |
93 | default: | |
94 | printk("Illegal/Unknown IEEE754 value class"); | |
95 | } | |
96 | printk("\n"); | |
97 | return x; | |
98 | } | |
99 | ||
100 | ieee754sp ieee754sp_dump(char *m, ieee754sp x) | |
101 | { | |
102 | int i; | |
103 | ||
104 | printk("%s=", m); | |
105 | printk("<%08x>\n", (unsigned) x.bits); | |
106 | printk("\t="); | |
107 | switch (ieee754sp_class(x)) { | |
108 | case IEEE754_CLASS_QNAN: | |
109 | case IEEE754_CLASS_SNAN: | |
110 | printk("Nan %c", SPSIGN(x) ? '-' : '+'); | |
111 | for (i = SP_FBITS - 1; i >= 0; i--) | |
112 | printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0'); | |
113 | break; | |
114 | case IEEE754_CLASS_INF: | |
115 | printk("%cInfinity", SPSIGN(x) ? '-' : '+'); | |
116 | break; | |
117 | case IEEE754_CLASS_ZERO: | |
118 | printk("%cZero", SPSIGN(x) ? '-' : '+'); | |
119 | break; | |
120 | case IEEE754_CLASS_DNORM: | |
121 | printk("%c0.", SPSIGN(x) ? '-' : '+'); | |
122 | for (i = SP_FBITS - 1; i >= 0; i--) | |
123 | printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0'); | |
124 | printk("e%d", SPBEXP(x) - SP_EBIAS); | |
125 | break; | |
126 | case IEEE754_CLASS_NORM: | |
127 | printk("%c1.", SPSIGN(x) ? '-' : '+'); | |
128 | for (i = SP_FBITS - 1; i >= 0; i--) | |
129 | printk("%c", SPMANT(x) & SP_MBIT(i) ? '1' : '0'); | |
130 | printk("e%d", SPBEXP(x) - SP_EBIAS); | |
131 | break; | |
132 | default: | |
133 | printk("Illegal/Unknown IEEE754 value class"); | |
134 | } | |
135 | printk("\n"); | |
136 | return x; | |
137 | } |