1 //===-- sinf/cosf data tables ---------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "math_utils.h"
10 #include "sincosf_utils.h"
11 
12 #include <stdint.h>
13 
14 namespace __llvm_libc {
15 
16 // The constants and polynomials for sine and cosine.  The 2nd entry
17 // computes -cos (x) rather than cos (x) to get negation for free.
18 constexpr sincos_t SINCOSF_TABLE[2] = {
19     {{1.0, -1.0, -1.0, 1.0},
20      0x1.45f306dc9c883p+23,
21      0x1.921fb54442d18p+0,
22      0x1p+0,
23      -0x1.ffffffd0c621cp-2,
24      0x1.55553e1068f19p-5,
25      -0x1.6c087e89a359dp-10,
26      0x1.99343027bf8c3p-16,
27      -0x1.555545995a603p-3,
28      0x1.1107605230bc4p-7,
29      -0x1.994eb3774cf24p-13},
30     {{1.0, -1.0, -1.0, 1.0},
31      0x1.45f306dc9c883p+23,
32      0x1.921fb54442d18p+0,
33      -0x1p+0,
34      0x1.ffffffd0c621cp-2,
35      -0x1.55553e1068f19p-5,
36      0x1.6c087e89a359dp-10,
37      -0x1.99343027bf8c3p-16,
38      -0x1.555545995a603p-3,
39      0x1.1107605230bc4p-7,
40      -0x1.994eb3774cf24p-13},
41 };
42 
43 // Table with 4/PI to 192 bit precision.  To avoid unaligned accesses
44 // only 8 new bits are added per entry, making the table 4 times larger.
45 constexpr uint32_t INV_PIO4[24] = {
46     0xa2,       0xa2f9,     0xa2f983,   0xa2f9836e, 0xf9836e4e, 0x836e4e44,
47     0x6e4e4415, 0x4e441529, 0x441529fc, 0x1529fc27, 0x29fc2757, 0xfc2757d1,
48     0x2757d1f5, 0x57d1f534, 0xd1f534dd, 0xf534ddc0, 0x34ddc0db, 0xddc0db62,
49     0xc0db6295, 0xdb629599, 0x6295993c, 0x95993c43, 0x993c4390, 0x3c439041};
50 
51 } // namespace __llvm_libc
52