/* @(#)s_isnan.c 1.3 95/01/18 */
/*
 * ====================================================
 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
 *
 * Developed at SunSoft, a Sun Microsystems, Inc. business.
 * Permission to use, copy, modify, and distribute this
 * software is freely granted, provided that this notice
 * is preserved.
 * ====================================================
 */

/* isnan(x) returns 1 is x is nan, else 0;
 * no branching!
 */

#include "fdlibm.h"

int
isnan (double x)
{
  int hx, lx;

  hx = (__HI (x) & 0x7fffffff);
  lx = __LO (x);
  hx |= (unsigned) (lx | (-lx)) >> 31;
  hx = 0x7ff00000 - hx;
  return ((unsigned) (hx)) >> 31;
} /* isnan */