PC,立即数生成/符号扩展,MUX,3-8译码器 M 32 Imm 64 B PC Gen Select 每个周期结束时写入npc 64 无需写控制信号 M 641 Outo Inputs Outputs Out1 12 11 10 Out7 Out6 Out5 Out4 Out3 Out2 Outo Out2 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 Out3 Decoder 0 1 0 0 0 0 0 0 1 0 0 Out4 0 1 1 0 0 0 0 1 0 0 0 Out5 1 0 0 0 0 0 1 0 0 0 0 Out6 1 0 1 0 0 1 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 Out7 1 1 1 1 0 0 0 0 0 0 0PC,立即数生成/符号扩展,MUX,3-8译码器 每个周期结束时写入npc 无需写控制信号