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@YosysHQ

Yosys Headquarters

Yosys Open SYnthesis Suite

YosysHQ - Open Source EDA

OSS CAD Suite: the one-stop shop for our tools

If you want to use our EDA tools, the easiest way is to install the binary release OSS CAD suite, which contains all required dependencies and related tools. Find the documentation here. We also have an OSS CAD Suite github action for using the tools in a github CI workflow.

Tabby CAD Suite is a commercial extension of OSS CAD Suite available from YosysHQ GmbH that additionally includes the Verific frontend for industry-grade SystemVerilog and VHDL support, formal verification with SVA, and formal apps.

Our Projects

Front-ends for applications built on top of Yosys:

  • sby: formal property checking
  • mcy: mutation coverage
  • eqy: equivalence checking

Other notable projects:

  • riscv-formal: formally check compliance with the RISC-V specification
  • picorv32: A Size-Optimized RISC-V CPU
  • nerv: A very simple educational RISC-V CPU for demonstrating riscv-formal

Community

Support us

Like what we do? Please consider either buying a license for the Tabby CAD Suite or becoming a sponsor.

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  1. yosys yosys Public

    Yosys Open SYnthesis Suite

    C++ 3.6k 900

  2. nextpnr nextpnr Public

    nextpnr portable FPGA place and route tool

    C++ 1.4k 248

  3. sby sby Public

    SymbiYosys (sby) -- Front-end for Yosys-based formal verification flows

    Python 419 78

  4. oss-cad-suite-build oss-cad-suite-build Public

    Multi-platform nightly builds of open source digital design and verification tools

    Shell 924 85

Repositories

Showing 10 of 40 repositories
  • oss-cad-suite-build Public

    Multi-platform nightly builds of open source digital design and verification tools

    YosysHQ/oss-cad-suite-build’s past year of commit activity
    Shell 924 ISC 85 50 2 Updated Jan 19, 2025
  • apicula Public

    Project Apicula 🐝: bitstream documentation for Gowin FPGAs

    YosysHQ/apicula’s past year of commit activity
    Verilog 521 MIT 71 14 6 Updated Jan 19, 2025
  • prjpeppercorn Public

    Project Peppercorn - GateMate FPGA Bitstream Documentation

    YosysHQ/prjpeppercorn’s past year of commit activity
    C++ 11 ISC 2 0 0 Updated Jan 18, 2025
  • yosys Public

    Yosys Open SYnthesis Suite

    YosysHQ/yosys’s past year of commit activity
    C++ 3,603 ISC 900 466 127 Updated Jan 18, 2025
  • nextpnr Public

    nextpnr portable FPGA place and route tool

    YosysHQ/nextpnr’s past year of commit activity
    C++ 1,357 ISC 248 99 (1 issue needs help) 10 Updated Jan 17, 2025
  • prjpeppercorn-test-cases Public

    Project Peppercorn GateMate Test Cases

    YosysHQ/prjpeppercorn-test-cases’s past year of commit activity
    Verilog 2 ISC 0 0 0 Updated Jan 17, 2025
  • nextpnr-tests Public
    YosysHQ/nextpnr-tests’s past year of commit activity
    Verilog 6 ISC 5 0 2 Updated Jan 16, 2025
  • imctk Public

    Incremental Model Checking Toolkit

    YosysHQ/imctk’s past year of commit activity
    Rust 8 2 14 1 Updated Jan 15, 2025
  • prjtrellis Public

    Documenting the Lattice ECP5 bit-stream format.

    YosysHQ/prjtrellis’s past year of commit activity
    Python 404 88 33 12 Updated Jan 11, 2025
  • icestorm Public

    Project IceStorm - Lattice iCE40 FPGAs Bitstream Documentation (Reverse Engineered)

    YosysHQ/icestorm’s past year of commit activity
    Python 1,018 ISC 224 39 17 Updated Dec 11, 2024