I am seeking answers similar to this post, but for the F distribution rather than the normal distribution.
I seem to have set off alarm bells by asking for source code. A non-coded answer would also be useful, although there seem to be non-obvious implementation issues such as continued fractions, floating point precision, different algorithms for different input ranges, etc. Any answer with sufficient explanation to enable a "reduction to practice" would be very much appreciated. Of course, source code is the most complete and unambiguous answer of all.
My apologies if my question is out of scope of this forum. I would not want to abuse this valuable resource in any way.