Loading...
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 *
13 * ########################################################################
14 *
15 * This program is free software; you can distribute it and/or modify it
16 * under the terms of the GNU General Public License (Version 2) as
17 * published by the Free Software Foundation.
18 *
19 * This program is distributed in the hope it will be useful, but WITHOUT
20 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
21 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 * for more details.
23 *
24 * You should have received a copy of the GNU General Public License along
25 * with this program; if not, write to the Free Software Foundation, Inc.,
26 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
27 *
28 * ########################################################################
29 */
30
31
32#include "ieee754int.h"
33#include "ieee754sp.h"
34#include "ieee754dp.h"
35
36#define DP_EBIAS 1023
37#define DP_EMIN (-1022)
38#define DP_EMAX 1023
39
40#define SP_EBIAS 127
41#define SP_EMIN (-126)
42#define SP_EMAX 127
43
44/* special constants
45*/
46
47
48#if (defined(BYTE_ORDER) && BYTE_ORDER == LITTLE_ENDIAN) || defined(__MIPSEL__)
49#define SPSTR(s, b, m) {m, b, s}
50#define DPSTR(s, b, mh, ml) {ml, mh, b, s}
51#endif
52
53#ifdef __MIPSEB__
54#define SPSTR(s, b, m) {s, b, m}
55#define DPSTR(s, b, mh, ml) {s, b, mh, ml}
56#endif
57
58const struct ieee754dp_konst __ieee754dp_spcvals[] = {
59 DPSTR(0, DP_EMIN - 1 + DP_EBIAS, 0, 0), /* + zero */
60 DPSTR(1, DP_EMIN - 1 + DP_EBIAS, 0, 0), /* - zero */
61 DPSTR(0, DP_EBIAS, 0, 0), /* + 1.0 */
62 DPSTR(1, DP_EBIAS, 0, 0), /* - 1.0 */
63 DPSTR(0, 3 + DP_EBIAS, 0x40000, 0), /* + 10.0 */
64 DPSTR(1, 3 + DP_EBIAS, 0x40000, 0), /* - 10.0 */
65 DPSTR(0, DP_EMAX + 1 + DP_EBIAS, 0, 0), /* + infinity */
66 DPSTR(1, DP_EMAX + 1 + DP_EBIAS, 0, 0), /* - infinity */
67 DPSTR(0, DP_EMAX+1+DP_EBIAS, 0x7FFFF, 0xFFFFFFFF), /* + indef quiet Nan */
68 DPSTR(0, DP_EMAX + DP_EBIAS, 0xFFFFF, 0xFFFFFFFF), /* + max */
69 DPSTR(1, DP_EMAX + DP_EBIAS, 0xFFFFF, 0xFFFFFFFF), /* - max */
70 DPSTR(0, DP_EMIN + DP_EBIAS, 0, 0), /* + min normal */
71 DPSTR(1, DP_EMIN + DP_EBIAS, 0, 0), /* - min normal */
72 DPSTR(0, DP_EMIN - 1 + DP_EBIAS, 0, 1), /* + min denormal */
73 DPSTR(1, DP_EMIN - 1 + DP_EBIAS, 0, 1), /* - min denormal */
74 DPSTR(0, 31 + DP_EBIAS, 0, 0), /* + 1.0e31 */
75 DPSTR(0, 63 + DP_EBIAS, 0, 0), /* + 1.0e63 */
76};
77
78const struct ieee754sp_konst __ieee754sp_spcvals[] = {
79 SPSTR(0, SP_EMIN - 1 + SP_EBIAS, 0), /* + zero */
80 SPSTR(1, SP_EMIN - 1 + SP_EBIAS, 0), /* - zero */
81 SPSTR(0, SP_EBIAS, 0), /* + 1.0 */
82 SPSTR(1, SP_EBIAS, 0), /* - 1.0 */
83 SPSTR(0, 3 + SP_EBIAS, 0x200000), /* + 10.0 */
84 SPSTR(1, 3 + SP_EBIAS, 0x200000), /* - 10.0 */
85 SPSTR(0, SP_EMAX + 1 + SP_EBIAS, 0), /* + infinity */
86 SPSTR(1, SP_EMAX + 1 + SP_EBIAS, 0), /* - infinity */
87 SPSTR(0, SP_EMAX+1+SP_EBIAS, 0x3FFFFF), /* + indef quiet Nan */
88 SPSTR(0, SP_EMAX + SP_EBIAS, 0x7FFFFF), /* + max normal */
89 SPSTR(1, SP_EMAX + SP_EBIAS, 0x7FFFFF), /* - max normal */
90 SPSTR(0, SP_EMIN + SP_EBIAS, 0), /* + min normal */
91 SPSTR(1, SP_EMIN + SP_EBIAS, 0), /* - min normal */
92 SPSTR(0, SP_EMIN - 1 + SP_EBIAS, 1), /* + min denormal */
93 SPSTR(1, SP_EMIN - 1 + SP_EBIAS, 1), /* - min denormal */
94 SPSTR(0, 31 + SP_EBIAS, 0), /* + 1.0e31 */
95 SPSTR(0, 63 + SP_EBIAS, 0), /* + 1.0e63 */
96};
97
98
99int ieee754si_xcpt(int r, const char *op, ...)
100{
101 struct ieee754xctx ax;
102
103 if (!TSTX())
104 return r;
105 ax.op = op;
106 ax.rt = IEEE754_RT_SI;
107 ax.rv.si = r;
108 va_start(ax.ap, op);
109 ieee754_xcpt(&ax);
110 va_end(ax.ap);
111 return ax.rv.si;
112}
113
114s64 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 va_end(ax.ap);
126 return ax.rv.di;
127}
1// SPDX-License-Identifier: GPL-2.0-only
2/* ieee754 floating point arithmetic
3 * single and double precision
4 *
5 * BUGS
6 * not much dp done
7 * doesn't generate IEEE754_INEXACT
8 */
9/*
10 * MIPS floating point support
11 * Copyright (C) 1994-2000 Algorithmics Ltd.
12 */
13
14#include <linux/compiler.h>
15
16#include "ieee754.h"
17#include "ieee754sp.h"
18#include "ieee754dp.h"
19
20/*
21 * Special constants
22 */
23
24/*
25 * Older GCC requires the inner braces for initialization of union ieee754dp's
26 * anonymous struct member. Without an error will result.
27 */
28#define xPCNST(s, b, m, ebias) \
29{ \
30 { \
31 .sign = (s), \
32 .bexp = (b) + ebias, \
33 .mant = (m) \
34 } \
35}
36
37#define DPCNST(s, b, m) \
38 xPCNST(s, b, m, DP_EBIAS)
39
40const union ieee754dp __ieee754dp_spcvals[] = {
41 DPCNST(0, DP_EMIN - 1, 0x0000000000000ULL), /* + zero */
42 DPCNST(1, DP_EMIN - 1, 0x0000000000000ULL), /* - zero */
43 DPCNST(0, 0, 0x0000000000000ULL), /* + 1.0 */
44 DPCNST(1, 0, 0x0000000000000ULL), /* - 1.0 */
45 DPCNST(0, 3, 0x4000000000000ULL), /* + 10.0 */
46 DPCNST(1, 3, 0x4000000000000ULL), /* - 10.0 */
47 DPCNST(0, DP_EMAX + 1, 0x0000000000000ULL), /* + infinity */
48 DPCNST(1, DP_EMAX + 1, 0x0000000000000ULL), /* - infinity */
49 DPCNST(0, DP_EMAX + 1, 0x7FFFFFFFFFFFFULL), /* + ind legacy qNaN */
50 DPCNST(0, DP_EMAX + 1, 0x8000000000000ULL), /* + indef 2008 qNaN */
51 DPCNST(0, DP_EMAX, 0xFFFFFFFFFFFFFULL), /* + max */
52 DPCNST(1, DP_EMAX, 0xFFFFFFFFFFFFFULL), /* - max */
53 DPCNST(0, DP_EMIN, 0x0000000000000ULL), /* + min normal */
54 DPCNST(1, DP_EMIN, 0x0000000000000ULL), /* - min normal */
55 DPCNST(0, DP_EMIN - 1, 0x0000000000001ULL), /* + min denormal */
56 DPCNST(1, DP_EMIN - 1, 0x0000000000001ULL), /* - min denormal */
57 DPCNST(0, 31, 0x0000000000000ULL), /* + 1.0e31 */
58 DPCNST(0, 63, 0x0000000000000ULL), /* + 1.0e63 */
59};
60
61#define SPCNST(s, b, m) \
62 xPCNST(s, b, m, SP_EBIAS)
63
64const union ieee754sp __ieee754sp_spcvals[] = {
65 SPCNST(0, SP_EMIN - 1, 0x000000), /* + zero */
66 SPCNST(1, SP_EMIN - 1, 0x000000), /* - zero */
67 SPCNST(0, 0, 0x000000), /* + 1.0 */
68 SPCNST(1, 0, 0x000000), /* - 1.0 */
69 SPCNST(0, 3, 0x200000), /* + 10.0 */
70 SPCNST(1, 3, 0x200000), /* - 10.0 */
71 SPCNST(0, SP_EMAX + 1, 0x000000), /* + infinity */
72 SPCNST(1, SP_EMAX + 1, 0x000000), /* - infinity */
73 SPCNST(0, SP_EMAX + 1, 0x3FFFFF), /* + indef legacy quiet NaN */
74 SPCNST(0, SP_EMAX + 1, 0x400000), /* + indef 2008 quiet NaN */
75 SPCNST(0, SP_EMAX, 0x7FFFFF), /* + max normal */
76 SPCNST(1, SP_EMAX, 0x7FFFFF), /* - max normal */
77 SPCNST(0, SP_EMIN, 0x000000), /* + min normal */
78 SPCNST(1, SP_EMIN, 0x000000), /* - min normal */
79 SPCNST(0, SP_EMIN - 1, 0x000001), /* + min denormal */
80 SPCNST(1, SP_EMIN - 1, 0x000001), /* - min denormal */
81 SPCNST(0, 31, 0x000000), /* + 1.0e31 */
82 SPCNST(0, 63, 0x000000), /* + 1.0e63 */
83};