Category: DSP
Tools: Quartus® Prime
Device: Arria® 10


Normally, Quartus® Prime automatically packs at compile time when you run out of DSP blocks.
If you do it intentionally, by specifying that the 2 multiplier is assigned to 1DSP Block with the Logic Lock function, you have succeeded in fitting an independent 2 multiplier of 18x19 bits with 1DSP Block.
(Therefore, it is necessary to manage the placement of each block, so please be careful when using it.)
Please note that "multiply-sum and multiplication (18x19)" or "multiplication (27x27) and multiplication (18x19)" will not fit in one DSP.

See below for how to use the Logic Lock feature.

How to specify the placement of subordinate entities in a design (Logic Lock)