I have used CORDIC to compute fixed-point log/exp with 64 bits of precision, mostly because I wanted to avoid having to implement (portable) 64x64->128 bit inte

I have used CORDIC to compute fixed-point log/exp with 64 bits of precision, mostly because I wanted to avoid having to implement (portable) 64x64->128 bit integer multiplication in C. It is probably still slower than doing that, but the code was really simple, and very accurate.