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Mini RISC-V CPU

License: MIT License

Verilog 99.77% Coq 0.23%

risc-v microarchitecture cpu

tiny-riscv-cpu's Introduction

Tiny RISC-V CPU

Introduction

This repository contains RTL of a simple CPU architecture that implements our miniaturized version of the RISC-V Instruction Set. This project was designed and written as a result of a lab assignment during the computer architecture course at KAIST.

Our implementation includes a few variants:

Single-cycle CPU
Multi-cycle CPU
Pipelined CPU
Multi-cycle CPU with direct-mapped cache

Diagram

Supported RISC-V Instructions

Instruction	Type	Semantics
`JAL`
`JALR`
`BEQ`
`BNE`
`BLT`
`BGE`
`BLTU`
`BGEU`
`LW`
`SW`
`ADDI`
`SLTI`
`SLTIU`
`XORI`
`ORI`
`ANDI`
`SLLI`
`SRLI`
`SRAI`
`ADD`
`SUB`
`SLL`
`SLT`
`SLTU`
`XOR`
`SRL`
`SRA`
`OR`
`AND`

Reference

Andrew Waterman, Krste Asanović, SiFive Inc., 2017, The RISC-V Instruction Set Manual (Version 2.2)

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tiny-riscv-cpu's Issues

MultiCycleCPU controller control signal unstable 문제

controller 세번째 회로는 combinational 하기때문에 state가 바뀌면 이전 state의 control signal 값이 stable하지 않을 수 있다는 문제가 있음.

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