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- /* Compute sine and cosine of argument.
- Copyright (C) 2018-2019 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
- #include <stdint.h>
- #include <math.h>
- #include <sysdeps/ieee754/flt-32/math_config.h>
- #include <s_sincosf.h>
- /* The constants and polynomials for sine and cosine. The 2nd entry
- computes -cos (x) rather than cos (x) to get negation for free. */
- const sincos_t __sincosf_table[2] =
- {
- {
- { 1.0, -1.0, -1.0, 1.0 },
- #if TOINT_INTRINSICS
- 0x1.45F306DC9C883p-1,
- #else
- 0x1.45F306DC9C883p+23,
- #endif
- 0x1.921FB54442D18p0,
- 0x1p0,
- -0x1.ffffffd0c621cp-2,
- { -0x1.555545995a603p-3, 0x1.55553e1068f19p-5 },
- { 0x1.1107605230bc4p-7, -0x1.6c087e89a359dp-10 },
- { -0x1.994eb3774cf24p-13, 0x1.99343027bf8c3p-16 }
- },
- {
- { 1.0, -1.0, -1.0, 1.0 },
- #if TOINT_INTRINSICS
- 0x1.45F306DC9C883p-1,
- #else
- 0x1.45F306DC9C883p+23,
- #endif
- 0x1.921FB54442D18p0,
- -0x1p0,
- 0x1.ffffffd0c621cp-2,
- { -0x1.555545995a603p-3, -0x1.55553e1068f19p-5 },
- { 0x1.1107605230bc4p-7, 0x1.6c087e89a359dp-10 },
- { -0x1.994eb3774cf24p-13, -0x1.99343027bf8c3p-16 }
- }
- };
- /* Table with 4/PI to 192 bit precision. To avoid unaligned accesses
- only 8 new bits are added per entry, making the table 4 times larger. */
- const uint32_t __inv_pio4[24] =
- {
- 0xa2, 0xa2f9, 0xa2f983, 0xa2f9836e,
- 0xf9836e4e, 0x836e4e44, 0x6e4e4415, 0x4e441529,
- 0x441529fc, 0x1529fc27, 0x29fc2757, 0xfc2757d1,
- 0x2757d1f5, 0x57d1f534, 0xd1f534dd, 0xf534ddc0,
- 0x34ddc0db, 0xddc0db62, 0xc0db6295, 0xdb629599,
- 0x6295993c, 0x95993c43, 0x993c4390, 0x3c439041
- };
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