/* k_sinf.c -- float version of k_sin.c

   Copyright (C) 2011-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Adhemerval Zanella <azanella@br.ibm.com>, 2011

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Library General Public License as

   published by the Free Software Foundation; either version 2 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

   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public

   License along with the GNU C Library; see the file COPYING.LIB.  If

   not, see <http://www.gnu.org/licenses/>.  */

#include <float.h>

#include <math.h>

#include <fenv.h>

#include <math_private.h>

static const float twom27 =  7.4505806000e-09;

static const float half   =  5.0000000000e-01;

static const float S1     = -1.6666667163e-01;

static const float S2     =  8.3333337680e-03;

static const float S3     = -1.9841270114e-04;

static const float S4     =  2.7557314297e-06;

static const float S5     = -2.5050759689e-08;

static const float S6     =  1.5896910177e-10;

float

__kernel_sinf (float x, float y, int iy)

{

  float z, r, v;

  float ix;

  ix = __builtin_fabsf (x);

  if (ix < twom27)

    {				/* |x| < 2**-27 */

      if (ix < FLT_MIN && ix != 0.0f)

	__feraiseexcept (FE_UNDERFLOW|FE_INEXACT);

      else

	__feraiseexcept (FE_INEXACT);

      return x;

    }

  z = x * x;

  v = z * x;

  r = S2 + z * (S3 + z * (S4 + z * (S5 + z * S6)));

  if (iy == 0)

    return x + v * (S1 + z * r);

  else

    return x - ((z * (half * y - v * r) - y) - v * S1);

}