Re: [boost] Boost Digest, Vol 1227, Issue 2

From: David Abrahams (dave_at_[hidden])
Date: 2005-09-27 06:41:36

"Paul A Bristow" <pbristow_at_[hidden]> writes:

> The expense is the brain power required to produce a high quality
> implementation which proved more than expected for TR1 functions.
>
> IMO part of the problem is the unrealistic expectation of the
> Standards WGs for an accuracy similar to that for most of the other
> functions like sin, cos for which it IS feasible, albeit with care
> and skill, to get within a bit (ulp) or few.
>
> For some of the other functions, getting within a few decimal places
> is challenging.

What leads you to believe there is such an unrealistic expectation?  I
don't see any mention of accuracy in the proposed TR
(http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf for
reference).

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com