is there trivial way to change floats to fixed points?

["Marco Trevisan (Treviño)"]

Aapo Rantalainen wrote:
> Is there trivial (=automatic) way to change floating point arithmetic
> to fixed point arithmetic?
> 
> I have some compilable and runnable code, but it is too slow on
> Freerunner and I think it is because of used floats. It runs on Nokia
> Internet Tablet very well and I think it has almost same specks than
> Freerunner expect it has FPU.
> 
> So is there some other way than reading and learning whole source code
> and make changes? (Maybe some compile options to use fixed points
> instead of floats?)

I had found, some months ago, C implementation of a float-like type that
was really using integer maths.
It was a very well-written example, but unfortunately I can't find it
anymore :°( Damn!

Btw, I've found some theory [1] and also some code snippets in how
implementing it [2].

I hope it will help.

[1] http://ce.et.tudelft.nl/publicationfiles/284_127_Cilio99a.ps.gz
[2] http://www.embedded.com/columns/15201575

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