Re: [f-cpu] Re: optionnal instruction

[Yann Guidon <whygee@f-cpu.org>]

hi,

nicO wrote:
> Michael Riepe a écrit :
> > But I agree with you: there's no need to worry about FP with more than
> > 64 bits for the FC0.  In fact, the FC0 may not have FP hardware at all
> > (it's all optional, IIRC).
> 
> Yep, but we need to defined precisely the group of insrtruction to be
> defined. I think is to difficult to handel a compiler if almost all
> instruction could remove or not. I propose an FP group, a mul group
> (large interger unit : mul+divide?). I think it could have other
> proposal.

there is already an FP "group" in the instruction census.
It is divided into several optional subgroups, where instructions
are emulated when the corresponding unit is not available.

> nicO
WHYGEE
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