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SystemC Class Library

About SystemC

SystemC addresses the need for a system design and verification language that spans hardware and software. It is a language built as an ANSI C++ class library created for design and verification. Users worldwide are applying SystemC to system-level modeling, abstract analog/mixed-signal modeling, architectural exploration, performance modeling, software development, functional verification, and high-level synthesis. The SystemC API and its semantics are developed by the Accellera Systems Initiative and formally standardized and governed by the IEEE in the IEEE Std. 1666-2023 standard.

This version of SystemC is the reference implementation provided by the Accellera Systems Initiative and is mainly developed by the following Accellera Working Groups

In the event of discrepancies between the behavior of this implementation and statements made in the IEEE Std. 1666-2023 standard, the IEEE standard shall be taken to be definitive.

If you would like to contribute to this repository, please check the file.

Licensing and Copyright

See the separate LICENSE and NOTICE files to determine your rights and responsiblities for using SystemC.

User Documentation

The main documentation of SystemC is the IEEE Std. 1666-2023 Standard SystemC Language Reference Manual. You can find additional documentation for this release in the docs directory, some of which refers to older versions.


See the separate file that provides system information and installation instructions.

Release Notes

See the separate file that provides up-to-date information about this release of SystemC.

SystemC Community

About Accellera SystemC Working Groups

Accellera's SystemC Language Working Group (SystemC LWG) is one of the Accellera Working Groups that produce effective and efficient Electronic Design Automation (EDA) and Intellectual Property (IP) standards for today's advanced IC designs and embedded systems. The SystemC LWG is responsible for the definition and development of the SystemC and TLM core languages, the foundation on which all other SystemC libraries and functionality are built. Participants of both working groups include member companies and industry contributors. Technical contributors typically have many years of practical experience with IC and system design as well as developing and using EDA tools.

About Accellera Systems Initiative

Accellera Systems Initiative is an independent, not-for profit organization dedicated to create, support, promote and advance system-level design, modeling and verification standards for use by the worldwide electronics industry. The organization accelerates standards development and, as part of its ongoing partnership with the IEEE, its standards are contributed to the IEEE Standards Association for formal standardization and ongoing change control. For more information, please visit Find out more about membership. Follow @accellera on Twitter or to comment, please use #accellera.

Accellera, Accellera Systems Initiative and SystemC are trademarks of Accellera Systems Initiative Inc. All other trademarks and trade names are the property of their respective owners.