Retiming inside LPM_DIV

[Altera_Forum]

Hello all, 

 From my test Quartus can't move registers inside math of LPM_DIVIDE inferred automatically. There is a way to do it?  Thank you

[Altera_Forum]

The LPM_DIVIDE IP does cater for pipelining. However, how you infer that I don't know. I suspect you'll have to use the MegaWizard. 

 You won't be able to insert registers 'part way' through the calculation unless you infer two LPM_DIVIDE blocks to perform the calculation required and I doubt that'll gain you anything.  Cheers, Alex

[Altera_Forum]

Nope - you have to instantiate a MW core rather than inference. 

This issue has been around a long time - I raised an enhancement request for this about 6 years ago. Still waiting...

[Altera_Forum]

Using synthetizers like synplify retiming works. 

it seem a limitation of quartus that can't do retiming inside IP block.

[Altera_Forum]

--- Quote Start ---  Using synthetizers like synplify retiming works. it seem a limitation of quartus that can't do retiming inside IP block.  --- Quote End ---    Please raise an enhancement request with altera.