[myhdl-list] Re: always_comb problem

[David B. <dav...@fr...>]

Or maybe there is a better way to do it. Could we have comments around th=
e area
of code we want to ignore, like this:
    #Translate off
    print ...
    #Translate on
This would allow us to add more options in the future.

Regards,

David.



Selon David Brochart <dav...@fr...>:

> I think this is a good solution indeed, it would work for "always_comb"=
 a=3D
> nd
> "toVerilog".
>
> Thanks,
>
> David.
>
> Selon Jan Decaluwe <ja...@ja...>:
>
> > David Brochart wrote:
> > > Thanks for the explanation. I use "print" statements as debug funct=
io=3D
> ns but
> > I
> > > could as well use graphical functions if I do signal processing. In=
 o=3D
> ther
> > words
> > > in this example the problem was caused by "print" but it could be a=
ny=3D
> thing
> > that
> > > is not a signal or variable affectation. Then your solution doesn't=
 w=3D
> ork.
> > > Rather than adding a "pass" for everything we want to skip, we shou=
ld=3D
>  only
> > > "keep" the signal/variable affectations and "pass" everything else.=
 I=3D
> s
> > there a
> > > way to do that?
> >
> > Well, there may be an easy way to do this provided
> > there is some explicit help from the user.
> >
> > Actually there is a similar problem with conversion to
> > Verilog: sometimes one would like to add code (e.g.
> > for debug) that should be "hidden" from conversion (e.g.
> > because it contains non-convertible constructs.)
> >
> > A clean way to support this would be to use Python's
> > prefined __debug__ variable. (This is true by default,
> > and false when python is invoked with optimizations.)
> >
> > All code below an "if __debug__:" could simply be
> > ignored (for always_comb and also conversion.) So this
> > would be a general way for a user to add arbitrary code,
> > but of course he would have to state this explicitly.
> > But, as Explicit Is Better Than Implicit this may not
> > even be a disadvantage. Note that the actual value
> > of __debug__ would not be taken into consideration.
> >
> > What do you think?
> >
> > Regards, Jan
> >
> > --
> > Jan Decaluwe - Resources bvba - http://jandecaluwe.com
> > Losbergenlaan 16, B-3010 Leuven, Belgium
> >     Python is fun, and now you can design hardware with it:
> >     http://jandecaluwe.com/Tools/MyHDL/Overview.html
> >
> >
> >
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