https://github.com/losfair/violet

Superscalar RISC-V processor written in Clash.
https://github.com/losfair/violet

clash cpu hardware haskell risc-v

Last synced: 4 months ago
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Superscalar RISC-V processor written in Clash.

• Host: GitHub
• URL: https://github.com/losfair/violet
• Owner: losfair
• License: lgpl-3.0
• Created: 2020-09-06T00:19:21.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2022-08-23T17:36:44.000Z (over 2 years ago)
• Last Synced: 2023-08-07T22:41:07.860Z (over 1 year ago)
• Topics: clash, cpu, hardware, haskell, risc-v
• Language: Haskell
• Homepage:
• Size: 171 KB
• Stars: 34
• Watchers: 3
• Forks: 1
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Violet

Violet is a dual-issue superscalar RISC-V processor for educational purpose, written in [Clash](https://github.com/clash-lang/clash-compiler).

![Build status](https://github.com/losfair/Violet/actions/workflows/main.yaml/badge.svg)

## Features

- RV32IM

- 7-stage superscalar pipeline with in-order issue and "almost-in-order" commit

- BTB and GShare branch predictor

- Runs at 70-110 MHz on Artix-7 depending on configuration

- [3.76 CoreMark/MHz](https://github.com/losfair/Violet/runs/2093355709)

- Configurable

## Architecture

![Architecture](res/Violet.svg)

## Not yet implemented

- Interrupts

- RISC-V Privileded Architecture

- ISA Extensions other than M

- Instruction and data caches

## Verification

Violet is verified using cosimulation with [a software model](https://github.com/losfair/violet-cosim) written in Rust. Verification isn't extensive though - currently

only a small set of programs are tested. Don't tape out Violet yet :)