text: /*-
   * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * $FreeBSD: src/lib/msun/src/s_isnan.c,v 1.8.30.1.6.1 2010/12/21 17:09:25 kensmith Exp $
   */
  
  #include <math.h>
  
  #include "fpmath.h"
  
  /* Provided by libc */
  #if 0
  int
  isnan(double d)
  {
  	union IEEEd2bits u;
  
  	u.d = d;
  	return (u.bits.exp == 2047 && (u.bits.manl != 0 || u.bits.manh != 0));
  }
  #endif
  
  int
  isnanf(float f)
  {
  	union IEEEf2bits u;
  
  	u.f = f;
  	return (u.bits.exp == 255 && u.bits.man != 0);
  }
  
  int
  __isnanl(long double e)
  {
  	union IEEEl2bits u;
  
  	u.e = e;
  	mask_nbit_l(u);
  	return (u.bits.exp == 32767 && (u.bits.manl != 0 || u.bits.manh != 0));
  }
  