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Jordan Carlin

PROFILE

Jordan Carlin

Jordan McCarlin engineered core RISC-V architecture features and infrastructure across the riscv/sail-riscv repository, focusing on extensible ISA modeling, build system reliability, and CI/CD automation. He refactored extension configuration logic, modularized Sail files, and improved runtime configurability, enabling safer experimentation and faster iteration. Using C++, Sail, and YAML, Jordan enhanced code quality through rigorous code review, documentation updates, and dead code elimination, while also expanding hardware support and containerization options. His work addressed encoding correctness, streamlined onboarding, and improved cross-platform builds, resulting in a maintainable, auditable codebase that accelerates feature delivery and strengthens downstream tooling compatibility for RISC-V development.

Overall Statistics

Feature vs Bugs

66%Features

Repository Contributions

116Total
Bugs
25
Commits
116
Features
49
Lines of code
416,679
Activity Months13

Work History

October 2025

16 Commits • 5 Features

Oct 1, 2025

October 2025 monthly summary: Delivered substantial feature work and resilience improvements across RISCV tooling and ecosystem. Core hardware-extension support, ISA enhancements, and container-runtime parity were shipped, supported by a strengthened CI/CD foundation and updated Sail tooling. These efforts enhance security and compatibility, improve performance potential through better hints and prefetch handling, and accelerate deployment with Podman support. Strong business value comes from expanded hardware support, faster feedback loops, and more flexible deployment options for developers and operators.

September 2025

15 Commits • 6 Features

Sep 1, 2025

September 2025 monthly summary: Delivered cross-repo CI stability and performance improvements, restructured project layout for module clarity, cleaned handwritten support declarations, standardized licensing metadata, and extended automation in tooling and docs. Achieved reliable theorem prover builds, faster macOS pipelines through caching, and scripting-friendly outputs for udb tooling across the RISCV projects.

August 2025

7 Commits • 2 Features

Aug 1, 2025

In August 2025, delivered quality and reliability improvements across three RISCV projects, focused on code quality, configuration accuracy, and container runtime support. Key outcomes include enhanced CI/testing workflows, accurate CSR and configuration handling, and Podman/SELinux compatibility, enabling more reliable releases and smoother development workflows.

July 2025

4 Commits • 2 Features

Jul 1, 2025

July 2025 month-in-review for RISCV software engineering: delivered codebase clarity improvements, correctness fixes, and release automation across two repositories (riscv/sail-riscv and riscv-software-src/riscv-unified-db). The work enhances runtime reliability, accelerates upcoming releases, and strengthens downstream tooling compatibility.

June 2025

9 Commits • 2 Features

Jun 1, 2025

June 2025 monthly summary for riscv/sail-riscv: Delivered essential RISC-V model and CI improvements, fixed critical encoding/ISA issues, and expanded extension support. These efforts enhanced spec fidelity, improved validation velocity, and strengthened emulator reliability, translating to faster iteration cycles and higher confidence in releases.

May 2025

14 Commits • 5 Features

May 1, 2025

May 2025 performance highlights: Delivered meaningful business value through CI/build reliability, runtime configurability, and a modular extension architecture across riscv/sail-riscv and riscv-software-src/riscv-unified-db. The month focused on stable, auditable builds, clearer tracing/debugging, and safer extension composition, setting the stage for faster feature delivery and easier maintenance.

April 2025

22 Commits • 10 Features

Apr 1, 2025

April 2025 monthly summary for riscv/sail-riscv and riscv-software-src/riscv-unified-db. The focus was on delivering consistent extension configuration, enabling safer experimentation, expanding hardware capability exposure, and improving CI/QA feedback. These changes reduce configuration errors, speed up debugging, and improve overall code quality, supporting faster delivery of reliable features to users and customers. Overall impact: more deterministic builds, safer feature experimentation, broader extension support, faster issue resolution, and a cleaner, more maintainable codebase.

March 2025

7 Commits • 5 Features

Mar 1, 2025

Month 2025-03 focused on documenting, cleaning, and hardening Sail-RISC-V while expanding its RISC-V model fidelity. The work improves onboarding, reduces maintenance burden, and strengthens the reliability and correctness of simulations and builds. Key outcomes include clearer documentation for Sail-RISC-V, a leaner codebase, and stricter correctness constraints, alongside expanded ISA modeling for May-Be-Operations and tightened vector semantics.

February 2025

3 Commits • 2 Features

Feb 1, 2025

February 2025: riscv/sail-riscv — focused contributions spanning code quality improvements, CI/tooling enhancements, and a targeted correctness fix that reinforces privilege-mode behavior. The work improved maintainability and pipeline reliability while preserving functional integrity of the RISC-V instruction-set model.

January 2025

10 Commits • 3 Features

Jan 1, 2025

January 2025 monthly summary focusing on delivering business value through key features, major bug fixes, and cross-repo maintenance. Highlights include enabling Zicntr-based observability with gated counters, expanding Privilege architecture compliance via 64-bit medeleg and medelegh, and targeted codebase and documentation improvements to reduce risk and improve long-term maintainability across riscv/sail-riscv and riscv/sdtrigpend.

December 2024

5 Commits • 4 Features

Dec 1, 2024

Month: December 2024 Key features delivered: - Documentation enhancements: Update CODE_STYLE.md to prefer xlen usage over sizeof(xlen); README updated to document Sstc extension in supported features. - Internal refactor: Centralize FLEN definitions in Sail RISC-V model; move D/F extension values to dedicated files riscv_flen_D.sail and riscv_flen_F.sail; reduces redundancy. - Maintenance: Remove unused Sail backend target 'cgen' from Makefile to simplify the build. Major bugs fixed: - No explicit critical bugs fixed this month in the provided scope; efforts focused on refactors and documentation + build simplifications. Overall impact and accomplishments: - Increased maintainability and consistency across the Sail-RISC-V model, reduced duplication, and streamlined the build process, enabling faster onboarding and fewer build-time issues. Improved documentation reduces ambiguity for users and contributors. Technologies/skills demonstrated: - Sail language refactoring, modularization of definitions, build-system cleanup, documentation standards, and changelog traceability with commit references.

November 2024

2 Commits • 1 Features

Nov 1, 2024

Month: 2024-11. Focused delivery in riscv/sail-riscv with two primary changes: (1) RISCV MSTATUS legalization improvements and (2) cleanup for N extension removal. The work emphasizes correctness across configurations, maintainability, and alignment with the deprecation of the N extension.

October 2024

2 Commits • 2 Features

Oct 1, 2024

October 2024 focused on delivering high-impact improvements to riscv/sail-riscv with two key feature initiatives, strengthening developer onboarding, maintainability, and future extensibility. No major bug fixes were required this month; effort concentrated on documentation quality and feature groundwork that enable faster experimentation and iteration.

Activity

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Quality Metrics

Correctness94.4%
Maintainability95.8%
Architecture94.0%
Performance92.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

BashC++CMakeConfigurationCoqISAIsabelle/MLLeanMakefileMarkdown

Technical Skills

ARM ArchitectureAssembly LanguageBackend DevelopmentBit ManipulationBuild AutomationBuild SystemBuild System ConfigurationBuild System ManagementBuild SystemsC++C++ DevelopmentCI/CDCI/CD ConfigurationCLI DevelopmentCMake

Repositories Contributed To

5 repos

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

riscv/sail-riscv

Oct 2024 Oct 2025
13 Months active

Languages Used

MarkdownSailCoqOCamlMakefileSAILTextyaml

Technical Skills

Compiler DevelopmentDocumentationEmbedded SystemsRISC-V ISATechnical WritingCode Refactoring

riscv-software-src/riscv-unified-db

Apr 2025 Oct 2025
6 Months active

Languages Used

YAMLPythonRubyISAShellyaml

Technical Skills

Configuration ManagementDocumentationEmbedded SystemsTechnical WritingBuild SystemsCode Generation

riscv/riscv-isa-manual

Sep 2025 Sep 2025
1 Month active

Languages Used

YAMLadoc

Technical Skills

CI/CDDependabot ConfigurationDocumentationTechnical Writing

riscv/sdtrigpend

Dec 2024 Jan 2025
2 Months active

Languages Used

adoc

Technical Skills

Documentation

riscv/riscv-cheri

Aug 2025 Aug 2025
1 Month active

Languages Used

Makefile

Technical Skills

Build SystemBuild SystemsContainerization

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