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lewislzh

PROFILE

Lewislzh

Liu Zehao contributed to the OpenXiangShan ecosystem by developing and refining hardware debugging features, instruction decoding, and system integration across repositories such as XiangShan, NEMU, and ready-to-run. He implemented critical error management traits and enhanced emulator and simulation environments, focusing on RISC-V architecture and low-level programming in C++ and Scala. His work addressed trap handling, floating-point computation accuracy, and submodule alignment, improving debugging reliability and platform consistency. Liu also maintained documentation accuracy in XiangShan-doc, ensuring clear project navigation. His engineering demonstrated depth in system emulation, hardware-software integration, and robust debugging, supporting stable releases and realistic benchmarking.

Overall Statistics

Feature vs Bugs

53%Features

Repository Contributions

26Total
Bugs
9
Commits
26
Features
10
Lines of code
1,095
Activity Months4

Work History

May 2025

1 Commits

May 1, 2025

May 2025: Documentation accuracy improvements for Biweekly-76 in XiangShan-doc; corrected PR link (English/Chinese) to the correct issue, improving navigation and readiness for release.

December 2024

8 Commits • 2 Features

Dec 1, 2024

December 2024 monthly summary focusing on business value and technical delivery across four OpenXiangShan repositories. Major work delivered spans feature integration, bug fixes, and maintenance to improve stability, accuracy, and performance benchmarking. The team aligned upstream dependencies and internal workflows to enable more realistic testing, faster debugging, and higher quality floating-point computations.

November 2024

13 Commits • 4 Features

Nov 1, 2024

November 2024 performance highlights across OpenXiangShan/NEMU, OpenXiangShan/ready-to-run, OpenXiangShan/XiangShan, and OpenXiangShan/riscv-isa-sim. Delivered targeted bug fixes, architectural refactors, and upstream alignment that improve debugging reliability, trap/interrupt correctness, and integration with Spike and ready-to-run. Central achievements include trap state encapsulation, corrected SDT/MDT semantics, and consolidated NEMU readiness updates across repos.

October 2024

4 Commits • 4 Features

Oct 1, 2024

October 2024 (2024-10) focused on delivering high-value features across hardware debugging, runtime readiness, and instruction decoding, with emphasis on stability and preparation for upcoming releases. The work spanned three repositories and emphasized business value: improved debugging capabilities for hardware modules, up-to-date runtime environments with newer NEMU capabilities, and updated simulation tooling to reflect upstream fixes and enhancements.

Activity

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Quality Metrics

Correctness86.0%
Maintainability86.2%
Architecture84.6%
Performance80.8%
AI Usage20.0%

Skills & Technologies

Programming Languages

BinaryCC++GitMarkdownScala

Technical Skills

Build SystemBuild System ManagementBuild SystemsCPU ArchitectureComputer ArchitectureDebuggingDigital LogicDigital Logic DesignDocumentationEmbedded SystemsEmulator DevelopmentEmulator developmentFPGA DevelopmentHardware DesignLow-Level Programming

Repositories Contributed To

7 repos

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

OpenXiangShan/ready-to-run

Oct 2024 Dec 2024
3 Months active

Languages Used

Binary

Technical Skills

Build System ManagementSystem IntegrationBuild SystemBuild SystemsDebuggingEmulator Development

OpenXiangShan/XiangShan

Oct 2024 Dec 2024
3 Months active

Languages Used

GitScala

Technical Skills

Hardware DesignRISC-VSubmodule ManagementVersion ControlLow-level ProgrammingSystem Architecture

OpenXiangShan/NEMU

Nov 2024 Dec 2024
2 Months active

Languages Used

C

Technical Skills

CPU ArchitectureDebuggingEmbedded SystemsLow-Level ProgrammingRISC-V ArchitectureSystem Programming

OpenXiangShan/YunSuan

Dec 2024 Dec 2024
1 Month active

Languages Used

Scala

Technical Skills

Computer ArchitectureDigital LogicDigital Logic DesignFPGA DevelopmentHardware Design

OpenXiangShan/Utility

Oct 2024 Oct 2024
1 Month active

Languages Used

Scala

Technical Skills

Hardware DesignSystem Utilities

OpenXiangShan/riscv-isa-sim

Nov 2024 Nov 2024
1 Month active

Languages Used

C++

Technical Skills

Low-level programmingRISC-V ArchitectureSystem Simulation

OpenXiangShan/XiangShan-doc

May 2025 May 2025
1 Month active

Languages Used

Markdown

Technical Skills

Documentation

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