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marcorig's avatar
marcorig
Icon for New Contributor rankNew Contributor
9 months ago

LPM DIVIDE behaves differently between simulation and implementation

I have implemented a divider in a custom VHDL module in order to replace the instances of the LPM_DIVIDE IPs in my project. I've then checked the functionality of my module against the LPM_DIVIDE and...
Compilation
Platform
Simulation
ShengN_altera's avatar
ShengN_altera
Icon for Super Contributor rankSuper Contributor
9 months ago

Hi,


Yes, when tick Yes the LPM_HINT will use "LPM_REMAINDERPOSITIVE=TRUE" while tick No the LPM_HINT will use "LPM_REMAINDERPOSITIVE=FALSE". If LPM_HINT uses either "LPM_REMAINDERPOSITIVE=TRUE" or "LPM_REMAINDERPOSITIVE=FALSE", the results between simulation and signal tap are same.

If LPM_HINT use "UNUSED", the results between simulation and signal tap are not same. Please don't use "UNUSED" because correct usage are "LPM_REMAINDERPOSITIVE=TRUE" or "LPM_REMAINDERPOSITIVE=FALSE" for LPM_HINT.

So we can conclude the LPM DIVIDE behaves same between simulation and signal tap right? which answer the title of this thread.


So there's another new question regarding functionality right?


Thanks,

Regards,

Sheng