see section B of https://eprints.soton.ac.uk/267873/1/tcas1_cordic_review.pdf https://eprints.soton.ac.uk/267873/1/tcas1_cordic_review.pdf. Generalized cordic c

see section B of https://eprints.soton.ac.uk/267873/1/tcas1_cordic_review.pdf https://eprints.soton.ac.uk/267873/1/tcas1_cordic_review.pdf. Generalized cordic can compute hyperbolic trig functions which gives you exponentials. That said, it's still not useful for ML because it's pretty hard to beat polynomials and tables.