--- Quote Start ---
So your method involves sign extending both 9 bit inputs to 18 bit? This means, you need four multiplier blocks instead of one, not a useful suggestion, to my opinion. I would rather use signed/unsigned inputs with altmult_add, as previously said.
--- Quote End ---
This discussion has been more about theory than practicalilty. In practice, if you need to use all the bits of the multiplier input, then you have to use the signa/b inputs on the megafunction.
But, if you have spare bits on the input, you can simply sign extend and not need any more multipliers, and avoid using the wizard.
Honored Contributor
