math/w_exp2f.c

   1 /*
   2  * wrapper exp2f(x)
   3  */
   4
   5 #include <math.h>
   6 #include <math_private.h>
   7
   8 float
   9 __exp2f (float x)
  10 {
  11   float z = __ieee754_exp2f (x);
  12   if (__builtin_expect (!isfinite (z) || z == 0, 0)
  13       && isfinite (x) && _LIB_VERSION != _IEEE_)
  14     /* exp2 overflow: 144, exp2 underflow: 145 */
  15     return __kernel_standard_f (x, x, 144 + !!signbit (x));
  16
  17   return z;
  18 }
  19 weak_alias (__exp2f, exp2f)