Add Add ALU result 4 Shift left 2 RegDst Branch emRead Instruction [31-26] MemtoRe emWrite RegWrite Control ALUSrc Instruction [25-2 Read Read register 1 Read Instruction [20-16 Read data 1 Read M Write data2 PCaddress Zero ALU ALU ? Address data-M Instruction register 2 0 InstructionInstruction [15-11] regis LI memory data Registers Write Data data memo 16 Sign- extend Instruction [15-0] 32 ALU control Instruction [5-0] Figure 1. The basic implementation of the MIPS subset, including the necessary multiplexers and control line:s Add Add ALU result 4 Shift left 2 RegDst Branch emRead Instruction [31-26] MemtoRe emWrite RegWrite Control ALUSrc Instruction [25-2 Read Read register 1 Read Instruction [20-16 Read data 1 Read M Write data2 PCaddress Zero ALU ALU ? Address data-M Instruction register 2 0 InstructionInstruction [15-11] regis LI memory data Registers Write Data data memo 16 Sign- extend Instruction [15-0] 32 ALU control Instruction [5-0] Figure 1. The basic implementation of the MIPS subset, including the necessary multiplexers and control line:s