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69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/* Compute sine and cosine of argument.
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Copyright (C) 2018-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdint.h>
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#include <math.h>
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#include <sysdeps/ieee754/flt-32/math_config.h>
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#include <s_sincosf.h>
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/* The constants and polynomials for sine and cosine. The 2nd entry
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computes -cos (x) rather than cos (x) to get negation for free. */
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const sincos_t __sincosf_table[2] =
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{
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{
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{ 1.0, -1.0, -1.0, 1.0 },
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#if TOINT_INTRINSICS
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0x1.45F306DC9C883p-1,
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#else
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0x1.45F306DC9C883p+23,
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#endif
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0x1.921FB54442D18p0,
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0x1p0,
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-0x1.ffffffd0c621cp-2,
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{ -0x1.555545995a603p-3, 0x1.55553e1068f19p-5 },
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{ 0x1.1107605230bc4p-7, -0x1.6c087e89a359dp-10 },
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{ -0x1.994eb3774cf24p-13, 0x1.99343027bf8c3p-16 }
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},
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{
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{ 1.0, -1.0, -1.0, 1.0 },
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#if TOINT_INTRINSICS
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0x1.45F306DC9C883p-1,
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#else
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0x1.45F306DC9C883p+23,
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#endif
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0x1.921FB54442D18p0,
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-0x1p0,
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0x1.ffffffd0c621cp-2,
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{ -0x1.555545995a603p-3, -0x1.55553e1068f19p-5 },
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{ 0x1.1107605230bc4p-7, 0x1.6c087e89a359dp-10 },
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{ -0x1.994eb3774cf24p-13, -0x1.99343027bf8c3p-16 }
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}
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};
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/* Table with 4/PI to 192 bit precision. To avoid unaligned accesses
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only 8 new bits are added per entry, making the table 4 times larger. */
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const uint32_t __inv_pio4[24] =
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{
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0xa2, 0xa2f9, 0xa2f983, 0xa2f9836e,
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0xf9836e4e, 0x836e4e44, 0x6e4e4415, 0x4e441529,
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0x441529fc, 0x1529fc27, 0x29fc2757, 0xfc2757d1,
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0x2757d1f5, 0x57d1f534, 0xd1f534dd, 0xf534ddc0,
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0x34ddc0db, 0xddc0db62, 0xc0db6295, 0xdb629599,
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0x6295993c, 0x95993c43, 0x993c4390, 0x3c439041
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};
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