Quartus II 12.1 (64-bit). FIFO IP can only set the memory block type to Auto or M9K. When we choose Auto, it will still use M9K. How to constrain Cyclone 4 FIFO to use MLAB only? Thanks!
If the IP does not allow you to select MLAB, which means the IP does not support it. It might be due to
1) performance issue using the fifo on Mlab.
2) the device itself does not have Mlab.
However, check on the latest version of Quartus to see if they are any changes.