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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

Oppps, thanks kaz. it's late and I'm a bit tired. So actually it is working correctly. So why is the '0' in ('0' & cin) needed for? And can any one give me some explanation on the various adders out there, which one suits the best application and translation efficiency? Thanks. And a Happy New Year too.