funct7 rs2 rs1 funct3 rd opcode R-type 多周期控制信号 immediate[11:0] rs1 funct3 rd opcode I-type immed(11:5] rs2 rs1 funct3 immed[4:0] opcode S-type immed12,10:5] rs2 rs1 funct3 immed[4:1,11] opcode B-type lorD MemRead MemWrite IRWrite RegWrite ALUSrcA PC 0 0 M Instruction Read Address [19-15] register 1 M X Read A Instruction Memory Read data 1 [24-20] Zero register 2 MemData Instruction Registers ALU ALU ALUOut [11-7刀 Write Read result Write register data 2 B M data Instruction u register o Write data Instruction M [31-0] 1 Memory Imm data Gen ALU register control Instruction [6-0] FIGURE e4.5.3 MemtoReg ALUSrcB ALUOp llxx@ustc.edu.cn 10llxx@ustc.edu.cn 10 多周期控制信号 FIGURE e4.5.3