/* 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 <math-underflow.h>

#include <libm-alias-double.h>

#define IN_SINCOS

#include "s_sin.c"

void

__sincos (double x, double *sinx, double *cosx)

{

  mynumber u;

  int k;

  SET_RESTORE_ROUND_53BIT (FE_TONEAREST);

  u.x = x;

  k = u.i[HIGH_HALF] & 0x7fffffff;

  if (k < 0x400368fd)

    {

      double a, da, y;

      /* |x| < 2^-27 => cos (x) = 1, sin (x) = x.  */

      if (k < 0x3e400000)

	{

	  if (k < 0x3e500000)

	    math_check_force_underflow (x);

	  *sinx = x;

	  *cosx = 1.0;

	  return;

	}

      /* |x| < 0.855469.  */

      else if (k < 0x3feb6000)

	{

	  *sinx = do_sin (x, 0);

	  *cosx = do_cos (x, 0);

	  return;

	}

      /* |x| < 2.426265.  */

      y = hp0 - fabs (x);

      a = y + hp1;

      da = (y - a) + hp1;

      *sinx = __copysign (do_cos (a, da), x);

      *cosx = do_sin (a, da);

      return;

    }

  /* |x| < 2^1024.  */

  if (k < 0x7ff00000)

    {

      double a, da, xx;

      unsigned int n;

      /* If |x| < 105414350 use simple range reduction.  */

      n = k < 0x419921FB ? reduce_sincos (x, &a, &da) : __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;

	}

      *sinx = do_sin (a, da);

      xx = do_cos (a, da);

      *cosx = (n & 2) ? -xx : xx;

      return;

    }

  if (isinf (x))

    __set_errno (EDOM);

  *sinx = *cosx = x / x;

}

libm_alias_double (__sincos, sincos)