[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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
> 
> *************************************************************
> To unsubscribe, send an e-mail to majordomo@seul.org with
> unsubscribe f-cpu       in the body. http://f-cpu.seul.org/
*************************************************************
To unsubscribe, send an e-mail to majordomo@seul.org with
unsubscribe f-cpu       in the body. http://f-cpu.seul.org/