Re: [boost] [MPL.Math] updates for double

From: Peder Holt (peder.holt_at_[hidden])
Date: 2005-11-03 01:05:57

> Excellent!
>
> I've now added a power function to the mix,
> implemented in terms of exponential and logarithm.  A
> more efficient implementation that uses fractions or
> other series functions may come later.
>
>                               Cromwell D. Enage

Great!

I tried implementing a power using fractions, but it turned out that
for larger exponents its convergence rate was very poor. (I needed
~100 recursions for something like 10^20)

What we should do, is add a specialization for power with integral
exponent. This is a very fast algorithm (also in respect to
compile-time efficiency)
What we could do, is to split power(z,a) into two:
power(z,floor(a))*power(z,a-floor(a));

Regards,
Peder

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