Landing: a2fadd5c2c5c

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Project / Subsystem

gcc / aarch64

Date

2025-11-04

Author

Alfie Richards

Commit

a2fadd5c2c5c030c493dfccf3b3cf38e7e46144b

Source

github

Perf win

No

Breaking

No

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All attributes

project: gcc
subsystem: aarch64
patch_id: —
commit_hash: a2fadd5c2c5c030c493dfccf3b3cf38e7e46144b
source_type: github
headline: AArch64 streaming SVE exponential instruction gating receives an update.
tldr: GCC's AArch64 support for the streaming SVE FEXPA intrinsic now correctly gates its availability based on hardware support.
author: Alfie Richards
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • aarch64
• sve
• intrinsics
• compiler-features
• streaming-mode
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/a2fadd5c2c5c030c493dfccf3b3cf38e7e46144b
date: 2025-11-04T00:00:00.000Z

This update refines the availability gating of the svexpa intrinsic for AArch64 streaming SVE, ensuring it is enabled only when the ssve-fexpa feature is supported. This change aligns the compiler’s behavior with the underlying hardware capabilities, preventing incorrect code generation or feature exposure when ssve-fexpa is not present. Additionally, the __ARM_FEATURE_SSVE_FEXPA macro is now implemented, allowing developers to conditionally compile code based on this specific architecture feature.