1 /* Compute sine and cosine of argument.
2    Copyright (C) 2018-2021 Free Software Foundation, Inc.
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
17    <https://www.gnu.org/licenses/>.  */
18 
19 #include <stdint.h>
20 #include <math.h>
21 #include <sysdeps/ieee754/flt-32/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     { -0x1.555545995a603p-3, 0x1.55553e1068f19p-5 },
39     { 0x1.1107605230bc4p-7, -0x1.6c087e89a359dp-10 },
40     { -0x1.994eb3774cf24p-13, 0x1.99343027bf8c3p-16 }
41   },
42   {
43     { 1.0, -1.0, -1.0, 1.0 },
44 #if TOINT_INTRINSICS
45     0x1.45F306DC9C883p-1,
46 #else
47     0x1.45F306DC9C883p+23,
48 #endif
49     0x1.921FB54442D18p0,
50     -0x1p0,
51     0x1.ffffffd0c621cp-2,
52     { -0x1.555545995a603p-3, -0x1.55553e1068f19p-5 },
53     { 0x1.1107605230bc4p-7, 0x1.6c087e89a359dp-10 },
54     { -0x1.994eb3774cf24p-13, -0x1.99343027bf8c3p-16 }
55   }
56 };
57 
58 /* Table with 4/PI to 192 bit precision.  To avoid unaligned accesses
59    only 8 new bits are added per entry, making the table 4 times larger.  */
60 const uint32_t __inv_pio4[24] =
61 {
62   0xa2,       0xa2f9,	  0xa2f983,   0xa2f9836e,
63   0xf9836e4e, 0x836e4e44, 0x6e4e4415, 0x4e441529,
64   0x441529fc, 0x1529fc27, 0x29fc2757, 0xfc2757d1,
65   0x2757d1f5, 0x57d1f534, 0xd1f534dd, 0xf534ddc0,
66   0x34ddc0db, 0xddc0db62, 0xc0db6295, 0xdb629599,
67   0x6295993c, 0x95993c43, 0x993c4390, 0x3c439041
68 };
69