1  /*
       2   * Public domain.
       3   */
       4  
       5  #if defined(LIBM_SCCS) && !defined(lint)
       6  static char rcsid[] = "$NetBSD: $";
       7  #endif
       8  
       9  /*
      10   * isinfl(x) returns 1 if x is inf, -1 if x is -inf, else 0;
      11   * no branching!
      12   */
      13  
      14  #include <math.h>
      15  #include <math_private.h>
      16  
      17  int
      18  __isinfl (_Float128 x)
      19  {
      20  	int64_t hx,lx;
      21  	GET_LDOUBLE_WORDS64(hx,lx,x);
      22  	lx |= (hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL;
      23  	lx |= -lx;
      24  	return ~(lx >> 63) & (hx >> 62);
      25  }
      26  mathx_hidden_def (__isinfl)
      27  weak_alias (__isinfl, isinfl)