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The OSVVM Utility Library

The OSVVM utility library offers the same capabilities as those provided by other verification languages (such as SystemVerilog and UVM):

  • Transaction-Level Modeling and verification components
  • Constrained Random test generation
  • Functional Coverage with hooks for UCIS coverage database integration
  • Intelligent Coverage Random test generation
  • Utilities for testbench process synchronization generation
  • Utilities for clock and reset generation
  • Transcript files
  • Error logging and reporting - Alerts and Affirmations
  • Message filtering - Logs
  • Scoreboards and FIFOs (data structures for verification)
  • Memory models

Documentation for the Utility library can be found here

Release History

For current release information see

Downloading the libraries

The library OSVVM-Libraries contains all of the OSVVM libraries as submodules. Download the entire OSVVM model library using git clone with the "--recursive" flag:
$ git clone --recursive

Alternately just the OSVVM library can be downloaded using:
$ git clone

Participating and Project Organization

The OSVVM project welcomes your participation with either issue reports or pull requests. For details on how to participate see

You can find the project Authors here and Contributors here.

The OSVVM Family of libraries

The OSVVM family of libraries includes the Utility library (this one) as well as verification components and scripting. These are all kept as submodules of OSVVM-Libraries.

More Information on OSVVM

OSVVM Forums and Blog:
SynthWorks OSVVM Blog:
Documentation: Documentation for the OSVVM libraries can be found here

Copyright and License

Copyright (C) 2006-2020 by SynthWorks Design Inc.
Copyright (C) 2020 by OSVVM contributors

This file is part of OSVVM.

Licensed under Apache License, Version 2.0 (the "License")
You may not use this file except in compliance with the License.
You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
See the License for the specific language governing permissions and
limitations under the License.
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