libquadmath/math/finiteq.c

   1 /* finiteq.c -- __float128 version of s_finite.c.
   2  * Conversion to IEEE quad 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 #include "quadmath-imp.h"
  17
  18 /*
  19  * finiteq(x) returns 1 is x is finite, else 0;
  20  * no branching!
  21  */
  22
  23 int
  24 finiteq (const __float128 x)
  25 {
  26   int64_t hx;
  27   GET_FLT128_MSW64(hx,x);
  28   return (int)((uint64_t)((hx&0x7fff000000000000LL)
  29                            -0x7fff000000000000LL)>>63);
  30 }