| /* Compute sine and cosine of argument. |
| Copyright (C) 1997-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
| |
| 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 <errno.h> |
| #include <math.h> |
| |
| #include <math_private.h> |
| #include <libm-alias-double.h> |
| |
| #define __sin __sin_local |
| #define __cos __cos_local |
| #define IN_SINCOS 1 |
| #include "s_sin.c" |
| |
| /* Consolidated version of reduce_and_compute in s_sin.c that does range |
| reduction only once and computes sin and cos together. */ |
| static inline void |
| __always_inline |
| reduce_and_compute_sincos (double x, double *sinx, double *cosx) |
| { |
| double a, da; |
| unsigned int n = __branred (x, &a, &da); |
| |
| n = n & 3; |
| |
| if (n == 1 || n == 2) |
| { |
| a = -a; |
| da = -da; |
| } |
| |
| if (n & 1) |
| { |
| double *temp = cosx; |
| cosx = sinx; |
| sinx = temp; |
| } |
| |
| if (a * a < 0.01588) |
| *sinx = bsloww (a, da, x, n); |
| else |
| *sinx = bsloww1 (a, da, x, n); |
| *cosx = bsloww2 (a, da, x, n); |
| } |
| |
| void |
| __sincos (double x, double *sinx, double *cosx) |
| { |
| mynumber u; |
| int k; |
| |
| SET_RESTORE_ROUND_53BIT (FE_TONEAREST); |
| |
| u.x = x; |
| k = 0x7fffffff & u.i[HIGH_HALF]; |
| |
| if (k < 0x400368fd) |
| { |
| *sinx = __sin_local (x); |
| *cosx = __cos_local (x); |
| return; |
| } |
| if (k < 0x419921FB) |
| { |
| double a, da; |
| int4 n = reduce_sincos_1 (x, &a, &da); |
| |
| *sinx = do_sincos_1 (a, da, x, n, false); |
| *cosx = do_sincos_1 (a, da, x, n, true); |
| |
| return; |
| } |
| if (k < 0x42F00000) |
| { |
| double a, da; |
| int4 n = reduce_sincos_2 (x, &a, &da); |
| |
| *sinx = do_sincos_2 (a, da, x, n, false); |
| *cosx = do_sincos_2 (a, da, x, n, true); |
| |
| return; |
| } |
| if (k < 0x7ff00000) |
| { |
| reduce_and_compute_sincos (x, sinx, cosx); |
| return; |
| } |
| |
| if (isinf (x)) |
| __set_errno (EDOM); |
| |
| *sinx = *cosx = x / x; |
| } |
| libm_alias_double (__sincos, sincos) |
