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重构：两级译码 #11

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eastonman opened this issue Jun 25, 2022 · 1 comment

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refactor

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eastonman commented Jun 25, 2022

使用alusel和aluop对不同类型的指令做两级译码

eastonman added the refactor label

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eastonman commented Jun 29, 2022

现在在后端使用aluop临时判断的，可以提前到ID得到的信息：

单发射指令
原子发射指令，llsc等
影响取指通路，需要冲刷并重新取指的
是否是访存指令，st/ld

两级aluop的指令分组：

算术指令，一周期完成
算术指令，多周期
无条件跳转
条件跳转
访存指令
特权指令

有部分重合的可以考虑缩减

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