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7799b7b3 | 1 | /* Compute sine and cosine of argument. |
b168057a | 2 | Copyright (C) 1997-2015 Free Software Foundation, Inc. |
7799b7b3 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
7799b7b3 UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
7799b7b3 | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
7799b7b3 UD |
19 | |
20 | #include <math.h> | |
21 | ||
1ed0291c | 22 | #include <math_private.h> |
7799b7b3 UD |
23 | |
24 | ||
25 | void | |
26 | __sincos (double x, double *sinx, double *cosx) | |
27 | { | |
28 | int32_t ix; | |
29 | ||
30 | /* High word of x. */ | |
31 | GET_HIGH_WORD (ix, x); | |
32 | ||
33 | /* |x| ~< pi/4 */ | |
34 | ix &= 0x7fffffff; | |
c5d5d574 | 35 | if (ix >= 0x7ff00000) |
7799b7b3 UD |
36 | { |
37 | /* sin(Inf or NaN) is NaN */ | |
38 | *sinx = *cosx = x - x; | |
39 | } | |
40 | else | |
41 | { | |
3eea24da UD |
42 | *sinx = __sin (x); |
43 | *cosx = __cos (x); | |
7799b7b3 UD |
44 | } |
45 | } | |
46 | weak_alias (__sincos, sincos) | |
47 | #ifdef NO_LONG_DOUBLE | |
48 | strong_alias (__sincos, __sincosl) | |
49 | weak_alias (__sincos, sincosl) | |
50 | #endif |