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Max Wipfli

PROFILE

Max Wipfli

Worked on hardware and software co-design for the pulp-platform/spatz and EPFL-LAP/dynamatic repositories, focusing on RISC-V vector extensions and memory subsystem enhancements. Delivered new vector arithmetic features and improved instruction decoding in Verilog/SystemVerilog, while addressing edge-case bugs to stabilize hardware control paths. In Python and C++, refactored the LSQ generator for maintainability, unified store path logic, and introduced runtime configurability for memory bypass, optimizing conflict detection and reducing stalls. Enhanced test reliability by updating integration tests and improving diagnostics. The work emphasized robust system design, code maintainability, and thorough validation across embedded systems, backend development, and hardware description languages.

Overall Statistics

Feature vs Bugs

63%Features

Repository Contributions

14Total
Bugs
3
Commits
14
Features
5
Lines of code
10,302
Activity Months4

Work History

March 2026

5 Commits • 3 Features

Mar 1, 2026

Concise monthly summary for EPFL-LAP/dynamatic (March 2026): Key features delivered include LSQ bypass configurability, LSQ store path refactor with conflict-optimization across all pipeline configurations, and test stability improvements with Atax integration tests adjusted to integers. Major bugs fixed include memory-ordering conflict checks that now ignore completed ops and cleanup of LSQ ordering/port information generation. Overall impact: increased runtime tunability, reduced stalls due to accurate dependency checks, and improved test reliability, all while maintaining backward compatibility. Technologies demonstrated: memory subsystem design (LSQ), pipeline configuration unification, hazard detection optimization, and test engineering.

February 2026

2 Commits • 1 Features

Feb 1, 2026

February 2026 monthly summary for EPFL-LAP/dynamatic: Delivered stability and maintainability enhancements to the LSQ generator. Refactored to remove code duplication across pipeline configurations and standardized line endings to LF, ensuring consistent behavior and easier future maintenance without altering functionality. Verified through CI/integration tests across all pipeline configurations.

March 2025

6 Commits • 1 Features

Mar 1, 2025

March 2025 highlights: Expanded Spatz vector capabilities with added width-increasing arithmetic and improved instruction decoding, complemented by strengthened testing and reliability across hardware and the riscvTests framework. Key features delivered include vector widening arithmetic support for vwadd, vwaddu, vwsub, vwsubu in both vector-vector (vv) and vector-scalar (vx) forms, along with decoding updates and test enablement. Major bugs fixed include improvements to the vsetvli test in riscvTests (avl = -1 scenario) and macro correctness fixes for XCMP/FCMP, plus enhancements to test harness error reporting. A Spatz VFU scalar masking fix ensures results are masked using the correct instruction metadata, improving data integrity. Overall impact: expanded vector execution pathways, higher validation quality, and reduced risk for vector workloads, enabling more performant kernels and safer rollouts. Technologies/skills demonstrated include RISC-V vector extensions, instruction decoding, hardware-software integration, VFU masking, and riscvTests-based validation.

February 2025

1 Commits

Feb 1, 2025

February 2025: Focused on stabilizing the Spatz hardware control path by addressing a VL length computation bug in the Spatz Controller. The fix prevents VL values from exceeding VLMAX when AVL equals 0xffffffff, eliminating an unnecessary special-case branch and reducing risk of misconfiguration in runtime control. This change improves reliability of the VL setting path, lowers incidence of control-plane errors, and reinforces overall system robustness for the Spatz repository.

Activity

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Quality Metrics

Correctness95.8%
Maintainability88.6%
Architecture85.8%
Performance90.0%
AI Usage22.8%

Skills & Technologies

Programming Languages

CC++CMakePythonSystemVerilog

Technical Skills

Assembly LanguageBuild SystemsC programmingC++ developmentCode RefactoringEmbedded SystemsHardware DesignPythonPython programmingRISC-VSoftware EngineeringSystem DesignTestingVHDLVerilog/SystemVerilog

Repositories Contributed To

2 repos

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

pulp-platform/spatz

Feb 2025 Mar 2025
2 Months active

Languages Used

SystemVerilogCCMake

Technical Skills

Hardware DesignVerilog/SystemVerilogAssembly LanguageBuild SystemsEmbedded SystemsRISC-V

EPFL-LAP/dynamatic

Feb 2026 Mar 2026
2 Months active

Languages Used

PythonCC++

Technical Skills

Code RefactoringPythonSoftware EngineeringSystem DesignVersion ControlC programming