antmicro/verilator
Feb 2026 – Jun 2026
4 Months active
Languages Used
C++SystemVerilogPythonVerilog
Technical Skills
C++ developmentSystemVerilogtestingPython scriptingTesting and validationVerilog simulation
Kamil Danecki
PROFILE
Kamil Danecki
Contributed to the antmicro/verilator repository by delivering targeted improvements in simulation correctness, parameter handling, and standards compliance. Focused on C++ and SystemVerilog, the work included strengthening randomized parameter validation, enhancing array indexing and assignment semantics, and fixing conformance issues related to IEEE 1800-2023. Implemented robust test-driven development practices, introducing regression tests to prevent future issues and improve maintainability. Addressed core stability by resolving invalid array access in type handling and expanding test coverage for parameter processing. The technical approach emphasized AST manipulation, compiler design, and Python scripting, resulting in more reliable simulation models and reduced risk for downstream users.
Overall Statistics
Feature vs Bugs
20%Features
Repository Contributions
5Total
Bugs
4
Commits
5
Features
1
Lines of code
797
Activity Months4
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107 peopleSame Organization
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Work History
June 2026
1 Commits
Jun 1, 2026June 2026: Focused on stabilizing Verilator core in antmicro/verilator with a critical bug fix and regression coverage. Delivered a fix for invalid array access in t_class_param type handling and added a regression test for default parameters to prevent regressions.
1 Commits
Jun 1, 2026June 2026: Focused on stabilizing Verilator core in antmicro/verilator with a critical bug fix and regression coverage. Delivered a fix for invalid array access in t_class_param type handling and added a regression test for default parameters to prevent regressions.
June 2026
May 2026
2 Commits • 1 Features
May 1, 2026May 2026 monthly summary for antmicro/verilator: Delivered substantive improvements with a focus on correctness, stability, and test coverage. Key features delivered: Enhanced array indexing and assignment with pre/post increment/decrement and compound assignments, implemented via new classes to manage these operations, reducing side effects and improving reliability of array handling across the codebase (commit 659274e45dbdf5b1b44d967568e78b55dad83b9e). Major bug fix: ParamProcessor: corrected type parameter ordering and added regression tests to validate proper processing and prevent regressions (commit b06ea01afb4d5b9819c822e74348fa1f3697b561). Overall impact: improved correctness and stability of array operations and parameter processing, with increased test coverage and maintainability. Technologies/skills demonstrated: C++ class design for operator semantics, AST/Param processing, regression testing, and robust code-quality practices. Business value: reduces risk for downstream users by ensuring reliable array semantics and parameter handling in generated models, improving maintainability and confidence in Verilator across parameterized constructs.
May 2026
2 Commits • 1 Features
May 1, 2026May 2026 monthly summary for antmicro/verilator: Delivered substantive improvements with a focus on correctness, stability, and test coverage. Key features delivered: Enhanced array indexing and assignment with pre/post increment/decrement and compound assignments, implemented via new classes to manage these operations, reducing side effects and improving reliability of array handling across the codebase (commit 659274e45dbdf5b1b44d967568e78b55dad83b9e). Major bug fix: ParamProcessor: corrected type parameter ordering and added regression tests to validate proper processing and prevent regressions (commit b06ea01afb4d5b9819c822e74348fa1f3697b561). Overall impact: improved correctness and stability of array operations and parameter processing, with increased test coverage and maintainability. Technologies/skills demonstrated: C++ class design for operator semantics, AST/Param processing, regression testing, and robust code-quality practices. Business value: reduces risk for downstream users by ensuring reliable array semantics and parameter handling in generated models, improving maintainability and confidence in Verilator across parameterized constructs.
April 2026
1 Commits
Apr 1, 2026In April 2026, the Verilator integration (antmicro/verilator) delivered a high-value bug fix to improve IEEE 1800-2023 conformance. Implemented and validated handling for modifications to members of objects defined with const handles, ensuring such modifications are properly flagged and managed according to the standard. The change reduces risk of non-conformance in simulation models and strengthens compatibility with user flows requiring strict IEEE 1800-2023 compliance. Commit 3587ac48a416fa9150b27efd1836521e3d99c0ee (Fix modification of members of object with const handle (#7433)) was reviewed and landed with sign-off by Kamil Danecki.
1 Commits
Apr 1, 2026In April 2026, the Verilator integration (antmicro/verilator) delivered a high-value bug fix to improve IEEE 1800-2023 conformance. Implemented and validated handling for modifications to members of objects defined with const handles, ensuring such modifications are properly flagged and managed according to the standard. The change reduces risk of non-conformance in simulation models and strengthens compatibility with user flows requiring strict IEEE 1800-2023 compliance. Commit 3587ac48a416fa9150b27efd1836521e3d99c0ee (Fix modification of members of object with const handle (#7433)) was reviewed and landed with sign-off by Kamil Danecki.
April 2026
February 2026
1 Commits
Feb 1, 2026February 2026 — Verilator (antmicro/verilator): Strengthened randomized parameter handling to improve reliability of testbenches and overall simulation correctness. Implemented robust parameter validation in std::randomize with clause, added checks for constant values, and introduced targeted tests to validate the changes. This fixes instability and edge-case usage (issue #7140) and is backed by the commit df6b808c496affa7db3fda746078c8a8257bdc23.Impact: more deterministic randomized inputs, reduced CI flakiness, and safer configuration of simulation scenarios. Demonstrated skills in C++, test-driven development, and Git-based collaboration.
February 2026
1 Commits
Feb 1, 2026February 2026 — Verilator (antmicro/verilator): Strengthened randomized parameter handling to improve reliability of testbenches and overall simulation correctness. Implemented robust parameter validation in std::randomize with clause, added checks for constant values, and introduced targeted tests to validate the changes. This fixes instability and edge-case usage (issue #7140) and is backed by the commit df6b808c496affa7db3fda746078c8a8257bdc23.Impact: more deterministic randomized inputs, reduced CI flakiness, and safer configuration of simulation scenarios. Demonstrated skills in C++, test-driven development, and Git-based collaboration.
Activity
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Quality Metrics
Correctness92.0%
Maintainability80.0%
Architecture80.0%
Performance80.0%
AI Usage24.0%
Skills & Technologies
Programming Languages
C++PythonSystemVerilogVerilog
Technical Skills
AST ManipulationC++C++ developmentCompiler DesignPython scriptingSoftware testingSystemVerilogTesting and debuggingTesting and validationVerilog designVerilog simulationtesting
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