Author beats compiler because floating point constraints, with -ffast-math compiler vectorizes the code.. I don't have arm64 hardware to test the result, but it

Author beats compiler because floating point constraints, with -ffast-math compiler vectorizes the code.. I don't have arm64 hardware to test the result, but its probably again pretty fast: https://gcc.godbolt.org/z/xvjY8P4cM https://gcc.godbolt.org/z/xvjY8P4cM