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Altera_Forum
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17 years ago

signed/unsigned multipliers

I can't seem to find a way to instantiate a multiplier that will dynamically select between signed and unsigned multiplication. This is on a Cyclone II, but applies to other parts as well. Read...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Hi SimKnutt,

We are not talking about conversion from natural binary to 2's (let alone 1's complement which is never used in practice).

It is assumed that we are given ready-made input as either unsigned or signed and we want to pass it through one (unsigned) multiplier. The method

described above does work as far as our limited testing indicates but may clash with compiler bitwidth issues regarding the dedicated multipliers.