基础流水线
模块实现
本实验需要实现一个五阶段流水线 CPU，流水线的五个阶段分别是：取指（IF）、译码（ID）、执行（EX）、访存（MEM）、写回（WB），不需要处理冲突。（假设本实验的仿真和验收代码均不存在数据冲突和控制冲突的情况）
- 你需要基于 Lab4-3 的代码进行修改。
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和 Lab4-3 类似地，验收时，你需要提供自己绘制的 CPU datapath 图。（笔者建议在开始本次实验之前就开始绘制，以便更好地理解流水线 CPU 的数据流）你可以参考理论课 PPT 的 datapath 或者其他人的图，但每个人的实现不尽相同，请务必动手绘制属于自己的 datapath。这里以理论课 PPT 的 datapath 为例：
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流水线的验证较为繁琐，良好的仿真测试可以事半功倍。请做好仿真验证，让仿真代码尽量覆盖所有情况。
Tip
- 你可能需要改变某些指令的数值，这些指令与 PC 值有关（如
AUIPC和JALR等）。 - 流水线寄存器是本次实验的一大重点，在进行实验之前，思考并梳理有哪些值是需要传到下一个阶段的。流水线寄存器部分代码较多，且大部分均为类似代码。为了书写方便，减少出错，笔者建议统一模块、寄存器、变量的命名方式，同时可以利用文本批量替换、Copilot 等工具来加速编写。
仿真验证
请使用类似 Lab4 中的 testbench，自行编写仿真代码进行仿真测试。
下板验证
验收代码
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memory_initialization_radix=16;
memory_initialization_vector=
00000097,00000013,00000013,00000013,0380006F,00000013,00000013,00000013,00000013,00000013,00000013,00000013,00000013,00000013,FE9FF06F,00000013,00000013,00000013,FC009CE3,00000013,00000013,00000013,04000063,00000013,00000013,00000013,00000F93,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,F99FF06F,00000013,00000013,00000013,00100F93,00000013,00000013,00000013,F6001CE3,00000013,00000013,00000013,F60064E3,00000013,00000013,00000013,FFF00093,00000013,00000013,00000013,0010C193,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003181B3,00000013,00000013,00000013,003182B3,00000013,00000013,00000013,005281B3,00000013,00000013,00000013,00318233,00000013,00000013,00000013,00420333,00000013,00000013,00000013,006303B3,00000013,00000013,00000013,00106413,00000013,00000013,00000013,01F06E13,00000013,00000013,00000013,01C3DEB3,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,D1D41CE3,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,CE744CE3,00000013,00000013,00000013,41C3DEB3,00000013,00000013,00000013,003EFEB3,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,CBD19CE3,00000013,00000013,00000013,00040E93,00000013,00000013,00000013,027EE863,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,C79FF06F,00000013,00000013,00000013,00200F93,00000013,00000013,00000013,407301B3,00000013,00000013,00000013,40338233,00000013,00000013,00000013,00102493,00000013,00000013,00000013,0041A533,00000013,00000013,00000013,00322533,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,BEA48CE3,00000013,00000013,00000013,01E1DE93,00000013,00000013,00000013,029E8863,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,BB9FF06F,00000013,00000013,00000013,00300F93,00000013,00000013,00000013,0030A513,00000013,00000013,00000013,0012A5B3,00000013,00000013,00000013,0030A633,00000013,00000013,00000013,0FF57513,00000013,00000013,00000013,00B57533,00000013,00000013,00000013,00C57533,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,B20504E3,00000013,00000013,00000013,0080B533,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,AE051CE3,00000013,00000013,00000013,00343533,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,AC0504E3,00000013,00000013,00000013,0030B513,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,A8051CE3,00000013,00000013,00000013,00100593,00000013,00000013,00000013,02B51863,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,A59FF06F,00000013,00000013,00000013,00400F93,00000013,00000013,00000013,0033E5B3,00000013,00000013,00000013,02658863,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,A09FF06F,00000013,00000013,00000013,00500F93,00000013,00000013,00000013,02000913,00000013,00000013,00000013,00592023,00000013,00000013,00000013,00492223,00000013,00000013,00000013,00092D83,00000013,00000013,00000013,005DCDB3,00000013,00000013,00000013,00692023,00000013,00000013,00000013,00092E03,00000013,00000013,00000013,01C34DB3,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,940D9CE3,00000013,00000013,00000013,A0000A37,00000013,00000013,00000013,01492423,00000013,00000013,00000013,FEDCBDB7,00000013,00000013,00000013,40CDDD93,00000013,00000013,00000013,00800E13,00000013,00000013,00000013,01CD9DB3,00000013,00000013,00000013,0FFDED93,00000013,00000013,00000013,00B90E83,00000013,00000013,00000013,01DDFDB3,00000013,00000013,00000013,01B92423,00000013,00000013,00000013,00895D83,00000013,00000013,00000013,FFFF0A37,00000013,00000013,00000013,01BA7A33,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,860A14E3,00000013,00000013,00000013,00600F93,00000013,00000013,00000013,00A94E03,00000013,00000013,00000013,00B94E83,00000013,00000013,00000013,008E9E93,00000013,00000013,00000013,01CEEEB3,00000013,00000013,00000013,010E9E93,00000013,00000013,00000013,01DDEEB3,00000013,00000013,00000013,00892E03,00000013,00000013,00000013,00000F17,00000013,00000013,00000013,FDDE1463,00000013,00000013,00000013,00092023,00000013,00000013,00000013,01B91023,00000013,00000013,00000013,0D000E13,00000013,00000013,00000013,01C90123,00000013,00000013,00000013,00092E03,00000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实验现象与 Lab4 相同。
实验要求
本次实验你需要完成的内容有：
- 绘制自己的 CPU datapath 图。
- 根据自己的 datapath 完成不处理冲突的五阶段流水线 CPU。
- 对实现的 CPU 进行仿真验证、下板验证、验收。
- 实验报告里需要包含的内容：
- datapath 图。
- 流水线 CPU 代码并简要分析（重点部分结合 datapath 和 Verilog 代码解释）。
- 仿真代码与波形截图（注意缩放比例、数制选择合适），并分析仿真波形。
- 下板图片与现象描述。