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

Re: Rep:Re: [f-cpu] Manual 0.2.6



> [... cshift instruction...]

> [... use mix ...]

> > 7 cycles for 8 chunks, that's quite good. So no need of a more complex
> > instruction for small chunk and the cshift[l/r] will be enough (perhaps a
> > immediate version will be usefull).
>
> An immediate version (cshift[rl]i) is not a problem.
>
> I think an `arithmetic' right shift (cshiftra) is not useful; but what
> about rotates (crotl/crotr)?

I agree for the arithmetic right shift. For a rotates (crot[l/r]), I think it 
depend of move. If move work with different size, it can be usefull, 
because we can extract more quickly a data from the register. 
	So I am for.

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