多周期处理器为单发射、五级流水线结构。实现的指令包括 add、addi、sub、and、or、xor、blt、bge、beq、jal、sll、srl、lw、sw。
处理器分为五部分(五级),在每两级之间都有时序电路 Flip-Flop 用来实现流水线,大致结构如下图所示。流水线处理器在单周期处理器的基础上对模块之间的分割更为严格,每一个信号都要穿过指定数量 Flip-Flop 来保证指令执行不会出错,而且流水线可能产生数据冲突和控制冲突,这都是需要解决的问题。
更详细的结构如下所示:
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