[fpu] Re: status

[Larry Doolittle <ldoolitt@recycle.lbl.gov>]

On Thu, Apr 27, 2000 at 10:29:14AM -0700, Larry Doolittle wrote:
> Near zero, ln(x-1) = x - 0.5*x^2 + ...
> If you implement this function by first subtracting one,
> you lose all your precision for small numbers.

Doh!  Pressed the "s" key too soon.
Of course, that should read:
  Near zero, ln(x+1) = x - 0.5*x^2 + ...
  If you implement this function by first adding one,
  you lose all your precision for small numbers.

> Same for exp(x-1).

And that, in turn, should be:
  Same for exp(x)-1.

     - Larry