Rep:Re: [f-cpu] Stack handling

[Thomas Lavergne <thomas.lavergne@laposte.net>]

Nicolas Boulay wrote:
>>From the beginning we choose that they will be no hardware stack in
> F-cpu. Stacks are always a bottleneck. So this should be left on the SW
> side.
> 
> If you want to avoid the need to save and restore data for call
> convention, we should use windowed register (that could be a great thing
> to decrease memory pressure, because most of the time there is no memory
> access). But the interrupt handler must be really optimised.

Windowed register have big problems with recursive function or too 
imbricated call. And task switching is a nightmare.

-- 
Thomas Lavergne                       "Le vrai rêveur est celui qui rêve
                                        de l'impossible."  (Elsa Triolet)
thomas.lavergne@laposte.net
d-12@laposte.net    ICQ:#137121910     http://assoc.wanadoo.fr/thallium/

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