Genetic improvement of data gives double precision invsqrt
William B. Langdon · Proceedings of the Genetic and Evolutionary Computation Conference Companion · 2019
CMA-ES plus manual code changes rapidly transforms 512 Newton-Raphson start points from a GNU C library table driven version of sqrt into a double precision reciprocal square root function. The GI x-1/2 is far more accurate than Quake's InvSqrt, Quare root.