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What are the values of control signals generated by the control module given in the attached picture for the instruction given below: Instruction: Add Rd,Rs,Rt
What are the values of control signals generated by the control module given in the attached picture for the instruction given below:
Instruction: Add Rd,Rs,Rt
Rd, Rs, Rt in the above instruction are registers.
Figure 4.4.5: The simple datapath with the control unit (COD Figure 4.17). The input to the control unit is the 6-bit opcode field from the instruction. The outputs of the control unit consist of three 1-bit signals that are used to control multiplexors (RegDst, ALUSrc, and MemtoReg), three signals for controlling reads and writes in the register file and data memory (RegWrite, MemRead, and MemWrite), a 1-bit signal used in determining whether to possibly branch (Branch), and a 2-bit control signal for the ALU (ALUOp). An AND gate is used to combine the branch control signal and the Zero output from the ALU; the AND gate output controls the selection of the next PC. Notice that PCSrc is now a derived signal, rather than one coming directly from the control unit. Thus, we drop the signal name in subsequent figuresStep by Step Solution
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