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Contributing to Verilator

Thanks for using Verilator! We welcome your contributions in whatever form.

This contributing document contains some suggestions that may make contributions flow more efficiently.

Did you find a bug?

  • Please ensure the bug was not already reported by searching Verilator Issues.
  • Please download the latest development GitHub version, build, and see if the issue has been fixed.
  • If you're unable to find an open issue addressing the problem, open a new Verilator issue.
    • Be sure to include a code sample or an executable test case demonstrating the bug and expected behavior that is not occurring.
    • The ideal example works against other simulators, and is in the test_regress/t test format, as described in Verilator Internals Documentation.

Did you write a patch that fixes a bug?

  • Please Open a new Verilator issue if there is not one already describing the bug.
  • Please Open a Verilator pull request.
  • See the coding conventions, and other developer information in docs/internals.rst in the distribution, or as rendered at Verilator Internals Documentation.
  • Verilator uses GitHub Actions to provide continuous integration. You may want to enable Actions on your GitHub branch to ensure your changes keep the tests passing.
  • Your source-code contributions must be certified as open source, under the Developer Certificate of Origin. On your first contribution, you must either:
    • Have your patch include the addition of your name to docs/CONTRIBUTORS (preferred).
    • Email, or post in an issue a statement that you certify your contributions.
    • In any of these cases, your name will be added to docs/CONTRIBUTORS and you are agreeing all future contributions are also certified.
    • We occasionally accept contributions where people do not want their name published. Please email us; you must still privately certify your contribution.
  • Your test contributions are generally considered released into the Creative Commons Public Domain (CC0), unless you request otherwise, or put a GNU/Artistic license on your file.
  • Most important is we get your patch.

Do you have questions?

Code of Conduct

  • Our contributors and participants pledge to make participation in our project and our community a positive experience for everyone. We follow the Contributor Covenant version 1.4.