Re: [Iverilog-devel] $monitor/$strobe and friend (pr1780480).

[Stephen W. <st...@ic...>]

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Cary R. wrote:
> --- Stephen Williams <st...@ic...> wrote:
> 
>> Look at all the various kinds of expression nodes are supported
>> by the VPI:-(
> 
> And it's real nice that we can safely ignore them in Icarus :-).
>  
>> That's something like a vpi expression node that supports vpi_get_value
>> by evaluating the expression. Perhaps the code generator can write
>> out the vpi expression nodes and make them available to the system
>> task?
> 
> OK I will think about this.
> 
> One complication so far is do we need to handle special the case when a
> $strobe is called inside a loop that may be changing a variable the
> expression depends on? Something like:
> 
> // $strobe the elements of an array.
> for(idx = 0; idx < 8; idx = idx + 1) begin
>   $strobe(a[idx]);
> end
> #1;
> 
> In this case do we assume the index variable is different for each call
> (is an argument) or is it just a normal expression? I believe the correct
> interpretation is that you will end up with eight strobes all displaying
> the value of a[8]. Thoughts?

I think you are right. Just one of many strange consequences
of $strobe/$monitor.



- --
Steve Williams                "The woods are lovely, dark and deep.
steve at icarus.com           But I have promises to keep,
http://www.icarus.com         and lines to code before I sleep,
http://www.picturel.com       And lines to code before I sleep."
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