Update.

[thirdparty/glibc.git] / sysdeps / libm-ieee754 / s_fpclassifyf.c

/* Return classification value corresponding to argument.
   Copyright (C) 1997 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 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,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <math.h>

#include "math_private.h"


int
__fpclassifyf (float x)
{
  u_int32_t wx;
  int retval = FP_NORMAL;

  GET_FLOAT_WORD (wx, x);
  wx &= 0x7fffffff;
  if (wx == 0)
    retval = FP_ZERO;
  else if (wx < 0x1000000)
    retval = FP_SUBNORMAL;
  else if (wx == 0x7f000000)
    retval = wx > 0x7f000000 ? FP_NAN : FP_INFINITE;

  return retval;
}