This simple datapath is of a single-cycle nature.
ADDI Instruction

The ADDI instruction performs an addition on both the source register's contents and the immediate data,
and stores the result in the destination register.

It's syntax is:
ADDI $destination register's address, $source register's address, immediate data.

The sample ADDI instruction demonstrated in the datapath above is ADDI $24, $27, .

The instruction's equivalent in binary is:

Information on the content of the registers used:
Register's Address Register's Address (Binary) Register's Value Register's Value (Binary)
$27 11011
$24 11000 To be updated To be updated