# rainbow

**Repository Path**: yecr/rainbow

## Basic Information

- **Project Name**: rainbow
- **Description**: 【知易行难】从零开始写一个RISC-V超标量处理器
- **Primary Language**: Scala
- **License**: MulanPSL-2.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 15
- **Forks**: 2
- **Created**: 2022-10-16
- **Last Updated**: 2025-12-16

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

#### 编译得到emu文件

```sh
make verilog
```
即可在build中得到名为SimTop.v的仿真顶层。

```sh
make emu
```
即可在build中得到名为emu的可执行文件。

```sh
./build/emu -h
```
可查看这个可执行文件的各种参数说明。



#### 加载镜像文件进行测试

emu可以通过-i参数加载镜像文件，bin目录下存放一部分测试文件，包括cpu-test、riscv-test等，还有一个开源操作系统rt-thread，以riscv-test中的addi测试为例：
```sh
./build/emu -i ./bin/non-output/riscv-tests/addi-riscv-tests.bin
```

参考输出如下：
```sh
Emu compiled at Feb  7 2023, 19:43:00
key num:0
share memory id:7
The image is ./bin/non-output/riscv-tests/addi-riscv-tests.bin
Using simulated 256MB RAM
--diff is not given, try to use $(NEMU_HOME)/build/riscv64-nemu-interpreter-so by default
Using /home/yecr/rainbow/NEMU/build/riscv64-nemu-interpreter-so for difftest
The first instruction of core 0 has commited. Difftest enabled. 
Core 0: HIT GOOD TRAP at pc = 0x800002c8
total guest instructions = 208
instrCnt = 208, cycleCnt = 213, IPC = 0.976526
Seed=0 Guest cycle spent: 215 (this will be different from cycleCnt if emu loads a snapshot)
Host time spent: 0ms
```