sysdeps/ieee754/ldbl-128/s_isinf_nsl.c

   1 /*
   2  * Written by Ulrich Drepper <drepper@gmail.com>
   3  */
   4
   5 /*
   6  * __isinf_nsl(x) returns != 0 if x is ±inf, else 0;
   7  * no branching!
   8  */
   9
  10 #include <math.h>
  11 #include <math_private.h>
  12
  13 int
  14 __isinf_nsl (long double x)
  15 {
  16         int64_t hx,lx;
  17         GET_LDOUBLE_WORDS64(hx,lx,x);
  18         return !(lx | ((hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL));
  19 }