Landing: 13ece0294f16

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Project / Subsystem

gcc / risc-v

Date

2026-05-17

Author

Christoph Müllner

Commit

13ece0294f16019878b9b2207282a3e52476bcbb

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: risc-v
patch_id: —
commit_hash: 13ece0294f16019878b9b2207282a3e52476bcbb
source_type: github
headline: RISC-V: Add C API and hwprobe bit for the zicfiss extension.
tldr: Adds metadata and runtime feature-bit probing for the RISC-V zicfiss extension, aligning with the C API and Linux hwprobe.
author: Christoph Müllner
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • risc-v
• zicfiss
• feature detection
• hwprobe
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/13ece0294f16019878b9b2207282a3e52476bcbb
date: 2026-05-17T00:00:00.000Z

This commit adds metadata and runtime feature-bit probing for the RISC-V zicfiss extension. It incorporates the RISC-V C API feature bit as defined in riscv-c-api-doc PR #187 and maps it to the corresponding Linux hwprobe constant (RISCV_HWPROBE_KEY_IMA_EXT_1). This allows the compiler to detect the zicfiss extension at runtime, improving compatibility and feature detection. The patch does not include new ISA extension support.