Re: [myhdl-list] intbv improvement?

[Jan D. <ja...@ja...>]

Neal Becker wrote:
> I would find this addition to the intbv constructor helpful:
> 
> class intbv(object):
>     __slots__ = ('_val', '_min', '_max', '_nrbits')
>     
>     def __init__(self, val=None, min=None, max=None, _nrbits=0, 
> is_signed=False):
>         if _nrbits:
>             if (is_signed):
>                self._min = -1 << (_nrbits-1)
>                self._max = ~(-1 << (_nrbits-1))
>             else:
>               self._min = 0
>               self._max = 2**_nrbits

I infer that you want to use _nrbits as an end user also?
This is not how the type is set up. _nrbits is intended
to be a private parameter of the constructor for internal
use.

One of the goals of intbv is to get rid of unsigned/signed
thinking as much as possible, and push the use of fine-grained
range control as high-level alternative.
(I'm actually writing a paper about this, almost finished.)

Jan

-- 
Jan Decaluwe - Resources bvba - http://www.jandecaluwe.com
    Python as a hardware description language:
    http://www.myhdl.org