pub fn exp2(x: f32) -> f32Expand description
Compute a fast approximation to 2x.
The maximum relative error for inputs for which the result is
normal (x ≥ -128) is less than 0.011. For x < -128, the
relative error in the (subnormal) result can be as large as 1.
If x is NaN, exp2 returns NaN.
See also exp2_raw which only works on -151 ≤ x ≤ 151,
but is % faster.