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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.

Pinned Loading

  1. yosys Public

    Yosys Open SYnthesis Suite

    C++ 3.7k 929

  2. nextpnr Public

    nextpnr portable FPGA place and route tool

    C++ 1.4k 252

  3. sby Public

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

    Python 443 80

  4. oss-cad-suite-build Public

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

    Shell 1k 90

Repositories

Showing 10 of 41 repositories
  • oss-cad-suite-build Public

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

    Shell 1,018 ISC 90 54 3 Updated Apr 15, 2025
  • yosys Public

    Yosys Open SYnthesis Suite

    C++ 3,747 ISC 929 477 116 Updated Apr 15, 2025
  • riscv-formal Public

    RISC-V Formal Verification Framework

    Verilog 131 ISC 29 6 5 Updated Apr 15, 2025
  • nextpnr Public

    nextpnr portable FPGA place and route tool

    C++ 1,416 ISC 252 105 (1 issue needs help) 9 Updated Apr 14, 2025
  • rtlil-mlir Public

    Yosys RTLIL dialect for MLIR

    C++ 3 ISC 0 0 0 Updated Apr 14, 2025
  • prjpeppercorn-test-cases Public

    Project Peppercorn GateMate Test Cases

    Verilog 7 ISC 1 0 0 Updated Apr 14, 2025
  • mcy Public

    Mutation Cover with Yosys (MCY)

    C++ 80 ISC 9 2 0 Updated Apr 9, 2025
  • eqy Public

    Equivalence checking with Yosys

    Python 42 7 12 0 Updated Apr 9, 2025
  • sby Public

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

    Python 443 80 38 11 Updated Apr 9, 2025
  • abc Public Forked from berkeley-abc/abc

    ABC: System for Sequential Logic Synthesis and Formal Verification

    C 27 626 0 2 Updated Apr 9, 2025

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