March 2026 focused on stabilizing and optimizing s390x support in golang/go, delivering important changes to the Go toolchain that improve performance, reliability, and maintainability for s390x deployments. Work was concentrated on cross-architecture ABI handling and runtime linking, with code changes integrated into the standard Go build and linking processes.

November 2025 monthly summary for golang/go. Focused on enabling end-to-end s390x register-based ABI (regabi) across the Go toolchain, improving cross-component consistency, performance potential, and runtime reflect/race integration. Also fixed a subnormal corner-case in s390x math.Pow to ensure correctness across edge cases.

April 2025 monthly summary focused on the itchyny/go repository. Delivered a targeted compatibility upgrade to broaden s390x support by updating the minimum supported s390x version from z196 to z13, aligning with the latest Go machine level and newer toolchains. This work reduces runtime issues on modern s390x deployments and simplifies adoption for users on updated hardware. Impact: Improved platform coverage for s390x, decreased runtime risk when building and running on newer Go toolchains, and clearer alignment with Go's architectural requirements. Scope: Change restricted to the internal/work path under cmd/go/internal/work; single-commit update with minimal risk and clear, testable outcome.

Month: 2024-11. Focused on stabilizing the golang/arch S390x assembler path and delivering targeted fixes with high business value. No major feature work beyond a critical bug fix, but improved reliability and correctness of the code path used in cross-architecture builds.

2024-10 monthly summary: Delivered S390x disassembler support (Plan 9 syntax) in itchyny/go, enabling the disassembler to interpret and format s390x instructions and enabling cross-architecture tooling for Go developers. This work is backed by commit eb29beb0ad83353097786cda793af8dea0b05b27. No major bugs fixed this month. Overall impact: expands architecture coverage, improves tooling reliability, and accelerates code analysis across platforms. Technologies/skills demonstrated: Go, disassembler development, Plan 9 syntax, cross-architecture support, code instrumentation and maintainability.