/* 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-ldouble.h>

void

__sincosl (long double x, long double *sinx, long double *cosx)

{

  int32_t se, i0, i1 __attribute__ ((unused));

  /* High word of x. */

  GET_LDOUBLE_WORDS (se, i0, i1, x);

  /* |x| ~< pi/4 */

  se &= 0x7fff;

  if (se < 0x3ffe || (se == 0x3ffe && i0 <= 0xc90fdaa2))

    {

      *sinx = __kernel_sinl (x, 0.0, 0);

      *cosx = __kernel_cosl (x, 0.0);

    }

  else if (se == 0x7fff)

    {

      /* sin(Inf or NaN) is NaN */

      *sinx = *cosx = x - x;

      if (isinf (x))

	__set_errno (EDOM);

    }

  else

    {

      /* Argument reduction needed.  */

      long double y[2];

      int n;

      n = __ieee754_rem_pio2l (x, y);

      switch (n & 3)

	{

	case 0:

	  *sinx = __kernel_sinl (y[0], y[1], 1);

	  *cosx = __kernel_cosl (y[0], y[1]);

	  break;

	case 1:

	  *sinx = __kernel_cosl (y[0], y[1]);

	  *cosx = -__kernel_sinl (y[0], y[1], 1);

	  break;

	case 2:

	  *sinx = -__kernel_sinl (y[0], y[1], 1);

	  *cosx = -__kernel_cosl (y[0], y[1]);

	  break;

	default:

	  *sinx = -__kernel_cosl (y[0], y[1]);

	  *cosx = __kernel_sinl (y[0], y[1], 1);

	  break;

	}

    }

}

libm_alias_ldouble (__sincos, sincos)