Re: [myhdl-list] Re: syntax sugar?

[Jan D. <ja...@ja...>]

(I think something went wrong with gmane yesterday, and the following
message from Haitao Zhang didn=B4t show up in gmane. So I repost
it -- Jan Decaluwe)

Haitao Zhang wrote:
> On 8/1/05, Jan Decaluwe <ja...@ja...> wrote:
> Jan,
> I generally agree with your comments against "syntax sugar" so I won't
> argue about it. Also thanks for pointing out a less verbose way to
> keep track.
>=20
> On the following point I want to point out a drawback:
> when you group all assignments you are making all the assignments
> sensitive to all signals on the RHS, and therefore whenever an event
> happens every single assignment will be evaluated. That may or may not
> be acceptable in terms of simulation efficiency, but it is not
> equivalent to multiple concurrent assignment blocks. Or maybe I don't
> understand what instances() and always_comb() do?
>=20
> Haitao
>=20
>=20
>>It is true that MyHDL is more verbose and more explicit. But I think
>>you are a little pessimistic. You could group all assigns in a single
>>function, and use always_comb() and instances(), like so:
>>
>>    ...
>>    def assignments():
>>        a.next =3D b
>>        c.next =3D d
>>        ...
>>    assignments_inst =3D always_comb(assignments)
>>    ....
>>    return instances()
>>
>>That=B4s not too bad, I think.
>>
>=20
>=20
>=20
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>=20


--=20
Jan Decaluwe - Resources bvba - http://jandecaluwe.com
Losbergenlaan 16, B-3010 Leuven, Belgium
     Using Python as a hardware description language:
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