How to use FFT megacore version 14.0 as IFFT

Hi Guys,

I am trying to simulate the FFT megacore version 14.0 of altera as IFFT. My question is that can i just use FFT core as IFFT by setting the inverse signal to high or i need to divide the output by N as well. I would also like to know that which ports are optional in FFT megacore of altera.

Thank you for support

Haroon