1/* Compute sine and cosine of argument.
2   Copyright (C) 1997-2018 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 "quadmath-imp.h"
22
23void
24sincosq (__float128 x, __float128 *sinx, __float128 *cosx)
25{
26  int64_t ix;
27
28  /* High word of x. */
29  GET_FLT128_MSW64 (ix, x);
30
31  /* |x| ~< pi/4 */
32  ix &= 0x7fffffffffffffffLL;
33  if (ix <= 0x3ffe921fb54442d1LL)
34    __quadmath_kernel_sincosq (x, 0, sinx, cosx, 0);
35  else if (ix >= 0x7fff000000000000LL)
36    {
37      /* sin(Inf or NaN) is NaN */
38      *sinx = *cosx = x - x;
39      if (isinfq (x))
40	errno = EDOM;
41    }
42  else
43    {
44      /* Argument reduction needed.  */
45      __float128 y[2];
46      int n;
47
48      n = __quadmath_rem_pio2q (x, y);
49      switch (n & 3)
50	{
51	case 0:
52	  __quadmath_kernel_sincosq (y[0], y[1], sinx, cosx, 1);
53	  break;
54	case 1:
55	  __quadmath_kernel_sincosq (y[0], y[1], cosx, sinx, 1);
56	  *cosx = -*cosx;
57	  break;
58	case 2:
59	  __quadmath_kernel_sincosq (y[0], y[1], sinx, cosx, 1);
60	  *sinx = -*sinx;
61	  *cosx = -*cosx;
62	  break;
63	default:
64	  __quadmath_kernel_sincosq (y[0], y[1], cosx, sinx, 1);
65	  *sinx = -*sinx;
66	  break;
67	}
68    }
69}
70