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ea5c662c | 1 | /* Compute sine and cosine of argument. |
6d7e8eda | 2 | Copyright (C) 2018-2023 Free Software Foundation, Inc. |
ea5c662c WD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
ea5c662c WD |
18 | |
19 | #include <stdint.h> | |
20 | #include <math.h> | |
21 | #include "math_config.h" | |
22 | #include "s_sincosf.h" | |
23 | ||
24 | /* The constants and polynomials for sine and cosine. The 2nd entry | |
25 | computes -cos (x) rather than cos (x) to get negation for free. */ | |
26 | const sincos_t __sincosf_table[2] = | |
27 | { | |
28 | { | |
29 | { 1.0, -1.0, -1.0, 1.0 }, | |
30 | #if TOINT_INTRINSICS | |
31 | 0x1.45F306DC9C883p-1, | |
32 | #else | |
33 | 0x1.45F306DC9C883p+23, | |
34 | #endif | |
35 | 0x1.921FB54442D18p0, | |
36 | 0x1p0, | |
37 | -0x1.ffffffd0c621cp-2, | |
38 | 0x1.55553e1068f19p-5, | |
39 | -0x1.6c087e89a359dp-10, | |
40 | 0x1.99343027bf8c3p-16, | |
41 | -0x1.555545995a603p-3, | |
42 | 0x1.1107605230bc4p-7, | |
43 | -0x1.994eb3774cf24p-13 | |
44 | }, | |
45 | { | |
46 | { 1.0, -1.0, -1.0, 1.0 }, | |
47 | #if TOINT_INTRINSICS | |
48 | 0x1.45F306DC9C883p-1, | |
49 | #else | |
50 | 0x1.45F306DC9C883p+23, | |
51 | #endif | |
52 | 0x1.921FB54442D18p0, | |
53 | -0x1p0, | |
54 | 0x1.ffffffd0c621cp-2, | |
55 | -0x1.55553e1068f19p-5, | |
56 | 0x1.6c087e89a359dp-10, | |
57 | -0x1.99343027bf8c3p-16, | |
58 | -0x1.555545995a603p-3, | |
59 | 0x1.1107605230bc4p-7, | |
60 | -0x1.994eb3774cf24p-13 | |
61 | } | |
62 | }; | |
63 | ||
64 | /* Table with 4/PI to 192 bit precision. To avoid unaligned accesses | |
65 | only 8 new bits are added per entry, making the table 4 times larger. */ | |
66 | const uint32_t __inv_pio4[24] = | |
67 | { | |
68 | 0xa2, 0xa2f9, 0xa2f983, 0xa2f9836e, | |
69 | 0xf9836e4e, 0x836e4e44, 0x6e4e4415, 0x4e441529, | |
70 | 0x441529fc, 0x1529fc27, 0x29fc2757, 0xfc2757d1, | |
71 | 0x2757d1f5, 0x57d1f534, 0xd1f534dd, 0xf534ddc0, | |
72 | 0x34ddc0db, 0xddc0db62, 0xc0db6295, 0xdb629599, | |
73 | 0x6295993c, 0x95993c43, 0x993c4390, 0x3c439041 | |
74 | }; |