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Altera_Forum's avatar
Altera_Forum
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11 years ago

Simple Signed Adder is complex to understand

Hi guys, still asking beginner questions, sorry. I have this code and cant figure out what the '0' in ('0' & cin) is doing. This is what I think: Lets say we we need to do add two to negative four...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

that '0' makes the cin signed positive to match its brothers and sisters.

The code is ok and you can alternatively use function resize which will sign extend if applied to signed value as done above manually.

I normally don't need cin as I will add in one go

and happy new year to you and all