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Andrew Lenharth

PROFILE

Andrew Lenharth

Andrew contributed to OpenXiangShan/circt and riscv/sail-riscv, focusing on build system modernization, documentation, and simulator accuracy. He enhanced documentation in OpenXiangShan/circt to clarify clock gating recognition for RTL power estimation, providing practical workarounds and improving onboarding for power analysis workflows using Markdown. In the same repository, Andrew centralized RTG attribute definitions and refactored CMake build scripts to follow MLIR-style conventions, streamlining configuration management and future development. For riscv/sail-riscv, he implemented configurable mtval handling in the simulator, updating Sail and configuration logic to align with the RISC-V Privileged Spec, thereby improving simulation fidelity and exception handling accuracy.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

4Total
Bugs
0
Commits
4
Features
3
Lines of code
217
Activity Months3

Work History

September 2025

1 Commits • 1 Features

Sep 1, 2025

Month: 2025-09 — riscv/sail-riscv: Feature-focused month delivering configurable mtval handling for RISC-V exceptions to improve simulator accuracy and conformance with the RISC-V Privileged Spec. The change enables per-exception mtval behavior (zero or retain bits) and updates to configuration and core exception handling logic to support this. This work lays groundwork for broader testing across exception scenarios and improves debugging fidelity in simulation.

February 2025

2 Commits • 1 Features

Feb 1, 2025

February 2025 monthly summary for OpenXiangShan/circt. Key features delivered include centralizing RTG attribute definitions and modernizing the build configuration. No major bugs fixed this month. Overall impact: improved RTG accessibility and maintainability, streamlined build system with MLIR-style CMake conventions, and consolidated project settings, enabling easier future attribute expansions and cross-repo collaboration. Technologies/skills demonstrated: CMake/MLIR-style builds, code refactoring, attribute consolidation, and cross-repo coordination between RTG and RTGTest.

December 2024

1 Commits • 1 Features

Dec 1, 2024

December 2024 monthly summary for OpenXiangShan/circt. Delivered documentation enhancement addressing clock gating recognition gaps in RTL-based power estimation tools. Added a dedicated documentation section explaining the issue and a practical workaround, including an example to generate if statements in always blocks to model clock gate behavior. The update is non-functional (NFC) and improves power-estimation accuracy and onboarding for RTL power analysis workflows. Commit tracked: 1edb784b04541f882a38669199d68783888c6d78.

Activity

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Quality Metrics

Correctness92.6%
Maintainability90.0%
Architecture92.6%
Performance85.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

C++CMakeMarkdownSailTableGen

Technical Skills

Build System ConfigurationCMakeCode RefactoringConfiguration ManagementDialect DevelopmentDocumentationEmbedded SystemsLLVM InfrastructureRISC-V ArchitectureSimulator Development

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

OpenXiangShan/circt

Dec 2024 Feb 2025
2 Months active

Languages Used

MarkdownC++CMakeTableGen

Technical Skills

DocumentationBuild System ConfigurationCMakeCode RefactoringDialect DevelopmentLLVM Infrastructure

riscv/sail-riscv

Sep 2025 Sep 2025
1 Month active

Languages Used

Sail

Technical Skills

Configuration ManagementEmbedded SystemsRISC-V ArchitectureSimulator Development

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