/* Return classification value corresponding to 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 <math.h>

#include <math_private.h>

int

__fpclassify (double x)

{

  uint32_t hx, lx;

  int retval = FP_NORMAL;

  EXTRACT_WORDS (hx, lx, x);

  lx |= hx & 0xfffff;

  hx &= 0x7ff00000;

  if ((hx | lx) == 0)

    retval = FP_ZERO;

  else if (hx == 0)

    retval = FP_SUBNORMAL;

  else if (hx == 0x7ff00000)

    retval = lx != 0 ? FP_NAN : FP_INFINITE;

  return retval;

}

libm_hidden_def (__fpclassify)