RE: [sv-bc] query regarding bind

I agree.

Shalom 

> -----Original Message-----
> From: owner-sv-bc@server.eda.org 
> [mailto:owner-sv-bc@server.eda.org] On Behalf Of Jonathan Bromley
> Sent: Monday, September 10, 2007 11:01 AM
> To: sv-bc@server.eda-stds.org; sv-ec@server.eda-stds.org
> Subject: RE: [sv-bc] query regarding bind
> 
> "Real" experts will no doubt comment in due course, but as a 
> user I think I know the answer and it would be interesting to 
> see if implementers agree:
> 
> >     module top( output out1,input in1);
> >     endmodule
> > 
> >     module mid(output X,input Y);
> >     endmodule
> > 
> >     module root(output a, input b);
> >         top  I(a,b);
> >     endmodule
> > 
> >     bind    top  mid mid_inst(out1,in1);
> >     bind    mid  top top_inst(X,Y);
> 
> The mental model I use for 'bind' is that it inserts a module 
> instance at the very end of the target module.
> So I can re-write your code:
> 
>    module top( output out1,input in1);
>      mid mid_inst(out1,in1);  // inserted by bind
>    endmodule
> 
>    module mid(output X,input Y);
>      top top_inst(X,Y);  // inserted by bind
>    endmodule
> 
>    module root(output a, input b);
>      top  I(a,b);
>    endmodule
> 
> It's now clear that the module instance tree has unbounded 
> mutual recursion, so the model cannot be elaborated.
> --
> Jonathan Bromley, Consultant
> 
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