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Is the sum signed in LPM_MULT megafunction?

Altera_Forum
Honored Contributor II
‎05-05-2009 06:41 PM
1,105 Views

This is a pretty straightforward question - I did not find the answer in the docs: 

 

- Is the sum input vector of an LPM_MULT megafunction signed? Is it only signed if the multiplication is signed? 

 

Thanks.
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Altera_Forum
Honored Contributor II
‎05-05-2009 08:40 PM
387 Views

To my opinion, it makes no difference, if you understand the sum input as signed or unsigned. Generally there's no difference between signed and unsigned add, unless saturation or carry is involved. 

 

Apparently, the sum option has been removed starting with the V8 MegaWizard.
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