Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* ieee754 floating point arithmetic |
2 | * single and double precision | |
3 | * | |
4 | * BUGS | |
5 | * not much dp done | |
6 | * doesn't generate IEEE754_INEXACT | |
7 | * | |
8 | */ | |
9 | /* | |
10 | * MIPS floating point support | |
11 | * Copyright (C) 1994-2000 Algorithmics Ltd. | |
12 | * http://www.algor.co.uk | |
13 | * | |
14 | * ######################################################################## | |
15 | * | |
16 | * This program is free software; you can distribute it and/or modify it | |
17 | * under the terms of the GNU General Public License (Version 2) as | |
18 | * published by the Free Software Foundation. | |
19 | * | |
20 | * This program is distributed in the hope it will be useful, but WITHOUT | |
21 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
22 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
23 | * for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License along | |
26 | * with this program; if not, write to the Free Software Foundation, Inc., | |
27 | * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
28 | * | |
29 | * ######################################################################## | |
30 | */ | |
31 | ||
32 | ||
33 | #include "ieee754int.h" | |
efec3c4e RB |
34 | #include "ieee754sp.h" |
35 | #include "ieee754dp.h" | |
1da177e4 LT |
36 | |
37 | #define DP_EBIAS 1023 | |
38 | #define DP_EMIN (-1022) | |
39 | #define DP_EMAX 1023 | |
40 | ||
41 | #define SP_EBIAS 127 | |
42 | #define SP_EMIN (-126) | |
43 | #define SP_EMAX 127 | |
44 | ||
1da177e4 LT |
45 | /* special constants |
46 | */ | |
47 | ||
48 | ||
49 | #if (defined(BYTE_ORDER) && BYTE_ORDER == LITTLE_ENDIAN) || defined(__MIPSEL__) | |
21a151d8 RB |
50 | #define SPSTR(s, b, m) {m, b, s} |
51 | #define DPSTR(s, b, mh, ml) {ml, mh, b, s} | |
1da177e4 LT |
52 | #endif |
53 | ||
54 | #ifdef __MIPSEB__ | |
21a151d8 RB |
55 | #define SPSTR(s, b, m) {s, b, m} |
56 | #define DPSTR(s, b, mh, ml) {s, b, mh, ml} | |
1da177e4 LT |
57 | #endif |
58 | ||
59 | const struct ieee754dp_konst __ieee754dp_spcvals[] = { | |
60 | DPSTR(0, DP_EMIN - 1 + DP_EBIAS, 0, 0), /* + zero */ | |
61 | DPSTR(1, DP_EMIN - 1 + DP_EBIAS, 0, 0), /* - zero */ | |
62 | DPSTR(0, DP_EBIAS, 0, 0), /* + 1.0 */ | |
63 | DPSTR(1, DP_EBIAS, 0, 0), /* - 1.0 */ | |
64 | DPSTR(0, 3 + DP_EBIAS, 0x40000, 0), /* + 10.0 */ | |
65 | DPSTR(1, 3 + DP_EBIAS, 0x40000, 0), /* - 10.0 */ | |
66 | DPSTR(0, DP_EMAX + 1 + DP_EBIAS, 0, 0), /* + infinity */ | |
67 | DPSTR(1, DP_EMAX + 1 + DP_EBIAS, 0, 0), /* - infinity */ | |
21a151d8 | 68 | DPSTR(0, DP_EMAX+1+DP_EBIAS, 0x7FFFF, 0xFFFFFFFF), /* + indef quiet Nan */ |
1da177e4 LT |
69 | DPSTR(0, DP_EMAX + DP_EBIAS, 0xFFFFF, 0xFFFFFFFF), /* + max */ |
70 | DPSTR(1, DP_EMAX + DP_EBIAS, 0xFFFFF, 0xFFFFFFFF), /* - max */ | |
71 | DPSTR(0, DP_EMIN + DP_EBIAS, 0, 0), /* + min normal */ | |
72 | DPSTR(1, DP_EMIN + DP_EBIAS, 0, 0), /* - min normal */ | |
73 | DPSTR(0, DP_EMIN - 1 + DP_EBIAS, 0, 1), /* + min denormal */ | |
74 | DPSTR(1, DP_EMIN - 1 + DP_EBIAS, 0, 1), /* - min denormal */ | |
75 | DPSTR(0, 31 + DP_EBIAS, 0, 0), /* + 1.0e31 */ | |
76 | DPSTR(0, 63 + DP_EBIAS, 0, 0), /* + 1.0e63 */ | |
77 | }; | |
78 | ||
79 | const struct ieee754sp_konst __ieee754sp_spcvals[] = { | |
80 | SPSTR(0, SP_EMIN - 1 + SP_EBIAS, 0), /* + zero */ | |
81 | SPSTR(1, SP_EMIN - 1 + SP_EBIAS, 0), /* - zero */ | |
82 | SPSTR(0, SP_EBIAS, 0), /* + 1.0 */ | |
83 | SPSTR(1, SP_EBIAS, 0), /* - 1.0 */ | |
84 | SPSTR(0, 3 + SP_EBIAS, 0x200000), /* + 10.0 */ | |
85 | SPSTR(1, 3 + SP_EBIAS, 0x200000), /* - 10.0 */ | |
86 | SPSTR(0, SP_EMAX + 1 + SP_EBIAS, 0), /* + infinity */ | |
87 | SPSTR(1, SP_EMAX + 1 + SP_EBIAS, 0), /* - infinity */ | |
21a151d8 | 88 | SPSTR(0, SP_EMAX+1+SP_EBIAS, 0x3FFFFF), /* + indef quiet Nan */ |
1da177e4 LT |
89 | SPSTR(0, SP_EMAX + SP_EBIAS, 0x7FFFFF), /* + max normal */ |
90 | SPSTR(1, SP_EMAX + SP_EBIAS, 0x7FFFFF), /* - max normal */ | |
91 | SPSTR(0, SP_EMIN + SP_EBIAS, 0), /* + min normal */ | |
92 | SPSTR(1, SP_EMIN + SP_EBIAS, 0), /* - min normal */ | |
93 | SPSTR(0, SP_EMIN - 1 + SP_EBIAS, 1), /* + min denormal */ | |
94 | SPSTR(1, SP_EMIN - 1 + SP_EBIAS, 1), /* - min denormal */ | |
95 | SPSTR(0, 31 + SP_EBIAS, 0), /* + 1.0e31 */ | |
96 | SPSTR(0, 63 + SP_EBIAS, 0), /* + 1.0e63 */ | |
97 | }; | |
98 | ||
99 | ||
100 | int ieee754si_xcpt(int r, const char *op, ...) | |
101 | { | |
102 | struct ieee754xctx ax; | |
103 | ||
104 | if (!TSTX()) | |
105 | return r; | |
106 | ax.op = op; | |
107 | ax.rt = IEEE754_RT_SI; | |
108 | ax.rv.si = r; | |
109 | va_start(ax.ap, op); | |
110 | ieee754_xcpt(&ax); | |
111 | return ax.rv.si; | |
112 | } | |
113 | ||
114 | s64 ieee754di_xcpt(s64 r, const char *op, ...) | |
115 | { | |
116 | struct ieee754xctx ax; | |
117 | ||
118 | if (!TSTX()) | |
119 | return r; | |
120 | ax.op = op; | |
121 | ax.rt = IEEE754_RT_DI; | |
122 | ax.rv.di = r; | |
123 | va_start(ax.ap, op); | |
124 | ieee754_xcpt(&ax); | |
125 | return ax.rv.di; | |
126 | } |