pulp-platform/spatz
Feb 2025 – Mar 2025
2 Months active
Languages Used
SystemVerilogCCMake
Technical Skills
Hardware DesignVerilog/SystemVerilogAssembly LanguageBuild SystemsEmbedded SystemsRISC-V
Max Wipfli
PROFILE
Max Wipfli
During two months contributing to the pulp-platform/spatz repository, Michael Wipfli expanded vector processing capabilities and improved hardware reliability. He implemented vector widening arithmetic instructions, such as vwadd and vwsub, supporting both vector-vector and vector-scalar forms, and updated instruction decoding to integrate these features. Using SystemVerilog and C, he enhanced test coverage and diagnostics, particularly within the riscvTests framework. Michael also addressed a VL length computation bug, ensuring correct vector length calculation and removing brittle edge-case handling. His work demonstrated depth in hardware design, RISC-V vector extensions, and embedded systems, resulting in more robust and maintainable hardware-software integration.
Overall Statistics
Feature vs Bugs
25%Features
Repository Contributions
7Total
Bugs
3
Commits
7
Features
1
Lines of code
186
Activity Months2
Your Network
40 people
Work History
March 2025
6 Commits • 1 Features
Mar 1, 2025March 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.
6 Commits • 1 Features
Mar 1, 2025March 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.
March 2025
February 2025
1 Commits
Feb 1, 2025February 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.
February 2025
1 Commits
Feb 1, 2025February 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
Correctness91.4%
Maintainability88.6%
Architecture82.8%
Performance88.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
CCMakeSystemVerilog
Technical Skills
Assembly LanguageBuild SystemsEmbedded SystemsHardware DesignRISC-VTestingVerilog/SystemVerilog
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