2. Design a datapath and a control unit for the following instructions:

add R1, R2, R3 # R1=R2+R3

sub R1, R2, R3 # R1=R2-R3

lw R1, memaddress # R1= Memory(memaddress)

sw R1, memaddress # Memory(memaddress) = R1

bne R1, R2, 7-bit-data # if R1 != R2 then jump to PC+2+(7-bit-data *2)

slt R1, R2, R3 # if R2 < R3 then R1=1 else R1=0

Assume each instruction has 16 bits. Also assume that there are 8 registers, an instruction memory unit with 1K bytes, and a data memory unit with 1K bytes.

a. Define a format for each instruction.

b. Draw a complete datapath (including the details of the Next Address Logic unit) which is able to perform the above operations; be sure to include Register File, ALU, Memory Units, PC, control signals, extra buffers or registers (if needed), number of wires from one component to the other, and any other components that you may need.

c. Design the control unit and draw the minimized logic diagram for it.