sysdeps/ieee754/dbl-64/wordsize-64/s_isinf_ns.c

   1 /*
   2  * Written by Ulrich Drepper <drepper@gmail.com>.
   3  */
   4
   5 /*
   6  * __isinf_ns(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 #undef __isinf_ns
  14 int
  15 __isinf_ns (double x)
  16 {
  17         int64_t ix;
  18         EXTRACT_WORDS64(ix,x);
  19         return (ix & UINT64_C(0x7fffffffffffffff)) == UINT64_C(0x7ff0000000000000);
  20 }