1 // SPDX-License-Identifier: GPL-2.0-only 1
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 ini
26 * anonymous struct member. Without an error
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
40 const union ieee754dp __ieee754dp_spcvals[] =
41 DPCNST(0, DP_EMIN - 1, 0x0000000000000
42 DPCNST(1, DP_EMIN - 1, 0x0000000000000
43 DPCNST(0, 0, 0x0000000000000
44 DPCNST(1, 0, 0x0000000000000
45 DPCNST(0, 3, 0x4000000000000
46 DPCNST(1, 3, 0x4000000000000
47 DPCNST(0, DP_EMAX + 1, 0x0000000000000
48 DPCNST(1, DP_EMAX + 1, 0x0000000000000
49 DPCNST(0, DP_EMAX + 1, 0x7FFFFFFFFFFFF
50 DPCNST(0, DP_EMAX + 1, 0x8000000000000
51 DPCNST(0, DP_EMAX, 0xFFFFFFFFFFFFF
52 DPCNST(1, DP_EMAX, 0xFFFFFFFFFFFFF
53 DPCNST(0, DP_EMIN, 0x0000000000000
54 DPCNST(1, DP_EMIN, 0x0000000000000
55 DPCNST(0, DP_EMIN - 1, 0x0000000000001
56 DPCNST(1, DP_EMIN - 1, 0x0000000000001
57 DPCNST(0, 31, 0x0000000000000
58 DPCNST(0, 63, 0x0000000000000
59 };
60
61 #define SPCNST(s, b, m)
62 xPCNST(s, b, m, SP_EBIAS)
63
64 const union ieee754sp __ieee754sp_spcvals[] =
65 SPCNST(0, SP_EMIN - 1, 0x000000),
66 SPCNST(1, SP_EMIN - 1, 0x000000),
67 SPCNST(0, 0, 0x000000),
68 SPCNST(1, 0, 0x000000),
69 SPCNST(0, 3, 0x200000),
70 SPCNST(1, 3, 0x200000),
71 SPCNST(0, SP_EMAX + 1, 0x000000),
72 SPCNST(1, SP_EMAX + 1, 0x000000),
73 SPCNST(0, SP_EMAX + 1, 0x3FFFFF),
74 SPCNST(0, SP_EMAX + 1, 0x400000),
75 SPCNST(0, SP_EMAX, 0x7FFFFF),
76 SPCNST(1, SP_EMAX, 0x7FFFFF),
77 SPCNST(0, SP_EMIN, 0x000000),
78 SPCNST(1, SP_EMIN, 0x000000),
79 SPCNST(0, SP_EMIN - 1, 0x000001),
80 SPCNST(1, SP_EMIN - 1, 0x000001),
81 SPCNST(0, 31, 0x000000),
82 SPCNST(0, 63, 0x000000),
83 };
84
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