1  /* s_isnanl.c -- long double version of s_isnan.c.
       2   */
       3  
       4  /*
       5   * ====================================================
       6   * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
       7   *
       8   * Developed at SunPro, a Sun Microsystems, Inc. business.
       9   * Permission to use, copy, modify, and distribute this
      10   * software is freely granted, provided that this notice
      11   * is preserved.
      12   * ====================================================
      13   */
      14  
      15  #if defined(LIBM_SCCS) && !defined(lint)
      16  static char rcsid[] = "$NetBSD: $";
      17  #endif
      18  
      19  /*
      20   * isnanl(x) returns 1 is x is nan, else 0;
      21   * no branching!
      22   */
      23  
      24  #include <math.h>
      25  #include <math_private.h>
      26  
      27  int __isnanl(_Float128 x)
      28  {
      29  	int64_t hx,lx;
      30  	GET_LDOUBLE_WORDS64(hx,lx,x);
      31  	hx &= 0x7fffffffffffffffLL;
      32  	hx |= (uint64_t)(lx|(-lx))>>63;
      33  	hx = 0x7fff000000000000LL - hx;
      34  	return (int)((uint64_t)hx>>63);
      35  }
      36  mathx_hidden_def (__isnanl)
      37  weak_alias (__isnanl, isnanl)