On Thu, Apr 1, 2010 at 7:59 PM, David Cournapeau <david@silveregg.co.jp> wrote:
Anne Archibald wrote:

> First I guess we should check which systems don't have log1p

This is already done - we do use the system log1p on linux (but note
that log2_1p is not standard AFAIK). I would guess few systems outside
windows don't have log1p, given that msun has an implementation,

I see that msun uses the same series I came to. However, my rational (Pade) approximation is a lot better than their polynomial.