Landing: f16af255e66e
Project / Subsystem
binutils / binutils/gas
Date
2026-06-08
Author
Sivan Shani <sivan.shani@arm.com>
Commit
f16af255e66e91ff38cef38e2c49b6092cbeebd6
Source
public_inbox
Perf win
Yes
Breaking
No
All attributes
- project
- binutils
- subsystem
- binutils/gas
- patch_id
- —
- commit_hash
- f16af255e66e91ff38cef38e2c49b6092cbeebd6
- source_type
- public_inbox
- headline
- GAS ARM supports CPU features with -mcpu
- tldr
- GAS for ARM now supports enabling and disabling CPU-specific architectural extensions using `+ext` and `+noext` modifiers with the `-mcpu` flag.
- author
- Sivan Shani <sivan.shani@arm.com>
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • arm
- • assembler
- • toolchain
- • extension
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-06-08T00:00:00.000Z
The GNU Assembler (GAS) for ARM architecture now allows developers to specify CPU-specific extensions using the -mcpu command-line option. Similar to how -march handles architecture features, this change introduces extension tables for -mcpu, enabling fine-grained control over features with +ext and +noext modifiers. This enhancement updates ARM CPU feature definitions to align with GCC CPU baselines and includes new tests for validating CPU extension modifiers and feature availability.