The mathLib.ldexp() system function takes as input a multiplier and a power of 2. It returns the value of the multiplier times 2 to the power of the specified exponent.
mathLib.Ldexp( multiplier FLOAT in, exponent INT in) returns (result FLOAT )
result = mathLib.Ldexp(myMultiplier,myExponent); // result = myMultiplier * 2**myExponent