Re: [Iverilog-devel] iverilog functions

[Martin W. <mai...@ma...>]

Martin Whitaker wrote:
> Cary R. wrote:
>> I can confirm that this does fail using both V10 and development.I'm
>> guessing it has something to do with the constant function code and the
>> SystemVerilog type or operators. I do not have time to look at this right
>> now. This looks like valid code and is likely a problem in Icarus so not
>> something that is easy for an end user to debug. If you feel adventurous
>> then look at the constant function code in the compiler (eval_tree.cc,
>> etc.) and add appropriate debug output to see what is going on. Cary
>
> Yes, running with the -deval_tree debugging option shows that all the SV
> merged operator/assignments (++, --, >>=) don't work in a constant context.
>
I've pushed a fix for this to both the devel and v10 branches. I've tested 
basic operation, but not explored mixing types, sizes, part selects, etc. Not 
currently supported are:

   - assignment to concatenations
   - increment/decrement operators inside expressions

Operation on real operands is implemented but not tested, because tgt-vvp 
doesn't currently support this either.

Martin