Re: [myhdl-list] intbv.saturate, intbv.wrap

[Thomas T. <tho...@de...>]

Picking up an rather old issue again:


In the discussion about the missing wrap around behaviour of intbv I wrote:

> I agree with Tom. There is not much use of wrap around in a DSP 
> application.

I have to withdraw this statement.

Just wanted to implement a CIC filter. For that the wrapping behaviour 
is definitely needed.

I tried to modifiy myhdl. But, as Jan mentioned last year, this is not 
an easy task.
As there is no need to modify the conversion code I thought subclassing 
would help, but I didn't get it to work  - yet.
So, the only short time workaround is to use "__verilog__" and "__debug__".

Any suggestions?



BTW:
__slot__ (without __dict__) in _Signal.py and _intbv.py could be a 
considered good to prevent different behaviour of myhdl code and 
converted code. But I would suggest to allow new attributes and raising 
a warning at conversion time if there is something different.