Re: [Iverilog-devel] VCD diff tool.

[Cary R. <cy...@ya...>]

--- On Tue, 9/23/08, Stephen Williams <st...@ic...> wrote:

> | 2. Support some user controllable variation in real
> |    values (percentage change).
> 
> Verilog-A has a name for the desired epsilon for a value.
> Perhaps something like that?

I will look into it, but this sounds perfect.

> | Am I missing anything from this list?
> 
> List of traces that you actually want to compare? I imagine
> one would only care about a subset of the actual traces, so
> some means to list those traces is necessary.

That certainly makes sense.

> | If we can't find anything I will likely implement
> | this in Perl which can then be easily integrated
> | into the test suite checking code. Yes, I'll have
> | a standalone command line interface.
> 
> Whatever language you use, I think it should be a
> stand-alone
> program. I'd choose to bundle it with Icarus Verilog
> and not the
> test suite;-)

You'll probably get both! The main compare engine will
be a Perl library that the test suite can use and the
command line script will provide a user friendly
interface. Of course if I'm free to use whatever I
want I would likely choose Python, but in the spirit
of keeping dependencies down, Perl is probably a
better choice.

Cary