1  /* s_isnanl.c -- long double version of s_isnan.c.
       2   * Conversion to long double by Jakub Jelinek, jj@ultra.linux.cz.
       3   */
       4  
       5  /*
       6   * ====================================================
       7   * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
       8   *
       9   * Developed at SunPro, a Sun Microsystems, Inc. business.
      10   * Permission to use, copy, modify, and distribute this
      11   * software is freely granted, provided that this notice
      12   * is preserved.
      13   * ====================================================
      14   */
      15  
      16  #if defined(LIBM_SCCS) && !defined(lint)
      17  static char rcsid[] = "$NetBSD: $";
      18  #endif
      19  
      20  /*
      21   * isnanq(x) returns 1 is x is nan, else 0;
      22   * no branching!
      23   */
      24  
      25  #include "quadmath-imp.h"
      26  
      27  int isnanq(__float128 x)
      28  {
      29  	int64_t hx,lx;
      30  	GET_FLT128_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  }