Re: Some improvements to numeric sqrt() and ln()

Tels <nospam-pg-abuse(at)bloodgate(dot)com> writes:
> This can be reformulated as:
> + * If r < 0 Then
> + * Let r = r + s
> + * Let s = s - 1
> + * Let r = r + s

Here's a v3 that

* incorporates Tels' idea;

* improves some of the comments (IMO anyway, though some are clear typos);

* adds some XXX comments about things that could be further improved
and/or need better explanations.

I also ran it through pgindent, just cause I'm like that.

With resolutions of the XXX items, I think this'd be committable.

regards, tom lane