ValueInt class needs something like $signed method in SV

[Amirk97]

So im using the value stored in an ValueInt object in python and the stored binary value which works correctly with dut interface always gets misinterpreted in Python world because python infers the given numbers as unsigend. I think having a $signed helper method in ValueInt class can be helpful to prevent such problems. I have currently implemented a $signed function in this way:

def signed(numb, width):
if (numb >> (width-1)):
return(-((2 ** width) - numb))
else:
return numb

[mballance]

Useful idea, @Amirk97 . I'm wondering whether it would make sense to have this be a way to construct a ValueInt. For example:

dut_val = <path>
vsc_val = vsc.ValueInt.from_bits(dut_val, width=32, signed=True)

Thoughts?

[mballance]

Have a look at the linked PR.

[Amirk97]

Well the proposed solution is definitely a solution, I think as a simple solution this would be ok but maybe a better solution would be to use the internal value that already is in ValueInt, instead of giving it as an argument to the function, or even if somehow we could put the information from signs and widths from when we construct the valueInt variable into the ValueInt class then its interface and usage would be much simpler. So an interface like this would be enough

python_val = ValueInt.py_val()
or at least it would be something like this:
python_val = ValueInt.py_val(width, sign)
because ValueInt class already has the binary value inside of it.

[Amirk97]

Sorry, I accidentally closed this!