1/* Compute sine and cosine of argument.
2 Copyright (C) 1997-2017 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and
5 Jakub Jelinek <jj@ultra.linux.cz>.
6
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
11
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
16
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
20
21#include <errno.h>
22#include <math.h>
23
24#include <math_private.h>
25
26void
27__sincosl (_Float128 x, _Float128 *sinx, _Float128 *cosx)
28{
29 int64_t ix;
30
31 /* High word of x. */
32 GET_LDOUBLE_MSW64 (ix, x);
33
34 /* |x| ~< pi/4 */
35 ix &= 0x7fffffffffffffffLL;
36 if (ix <= 0x3ffe921fb54442d1LL)
37 __kernel_sincosl (x, 0, sinx, cosx, 0);
38 else if (ix >= 0x7fff000000000000LL)
39 {
40 /* sin(Inf or NaN) is NaN */
41 *sinx = *cosx = x - x;
42 if (isinf (x))
43 __set_errno (EDOM);
44 }
45 else
46 {
47 /* Argument reduction needed. */
48 _Float128 y[2];
49 int n;
50
51 n = __ieee754_rem_pio2l (x, y);
52 switch (n & 3)
53 {
54 case 0:
55 __kernel_sincosl (y[0], y[1], sinx, cosx, 1);
56 break;
57 case 1:
58 __kernel_sincosl (y[0], y[1], cosx, sinx, 1);
59 *cosx = -*cosx;
60 break;
61 case 2:
62 __kernel_sincosl (y[0], y[1], sinx, cosx, 1);
63 *sinx = -*sinx;
64 *cosx = -*cosx;
65 break;
66 default:
67 __kernel_sincosl (y[0], y[1], cosx, sinx, 1);
68 *sinx = -*sinx;
69 break;
70 }
71 }
72}
73weak_alias (__sincosl, sincosl)
74