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Re: [f-cpu] freeze signal
whygee@club-internet.fr a écrit :
>
> hi,
>
> >De: <nicolas.boulay@ifrance.com>
>
> >Is it possible to add a signal to the entities to
> >completly freeze its output. It's different from
> >enable. The freeze signal must stop the pipeline or
> >at least the output port of the unit, no new data
> >should get out in the result port.
> >
> >We absolutely need this kind of stuff to handel unit
> >with a latency more than 1 (to manage the fact to
> >have 2 data could be ready in the same time)
> >
> >Any comment ?
>
> it's useless : writeback hazards are detected at decode/issue stage.
> No instruction is issued (that is : freeze at decode) when we detect that
> we won't be able to writeback in the future.
>
> hope this refreshes some memory :-)
>
Maybe in your theoretical scheduler but i wait to see it in real code.
Make a system which predict the future, why not ? But it will take (i
think) a lot of area (some calculation to do ?). At least, i wait the
algorythme.
nicO
> >nicO
> YG
>
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