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Re: [f-cpu] manual update


Michael Riepe wrote:

> On Thu, Jun 06, 2002 at 12:50:05PM +0000, Nicolas Boulay wrote:
>> p195 Chapter 3
> [...]
>> - We can't impose that more than 2 register can't point on the same
>> cache line. What happen with :
> Why should we do that? Every register may point everywhere.

physically, yes.
However there might be a HW limitation for the first versions.
The code will work but might have some thrashing (one or
two cycles of penalty per access where several pointers
point to the same line).

Please give me some time to explain that.
i started to answer nicO's mail but haven't
finished yet. it's not a simple thing to explain.


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