Landing: f5e868161a06

← All landings

Project / Subsystem

gcc / rs6000

Date

2026-06-09

Author

Jeevitha

Commit

f5e868161a067809c80517de5f4e836253bbd1d9

Source

github

Perf win

Breaking

View on GitHub →

All attributes

project: gcc
subsystem: rs6000
patch_id: —
commit_hash: f5e868161a067809c80517de5f4e836253bbd1d9
source_type: github
headline: Rs6000: Add future ISA compare and swap equal AMO operations
tldr: GCC now supports new PowerPC atomic memory operations for compare-and-swap-equal, anticipating future processor features.
author: Jeevitha
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • powerpc
• atomic-operations
• isa
• future-isa
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/f5e868161a067809c80517de5f4e836253bbd1d9
date: 2026-06-09T00:00:00.000Z

This commit introduces support for upcoming PowerPC compare-and-swap-equal atomic memory operations (AMOs). It adds new enumerations and helper functions, guarded by the _ARCH_FUTURE macro, to enable these operations in rs6000 configurations. For targets not designated as _ARCH_FUTURE, diagnostic stubs will provide compile-time errors, ensuring forward compatibility while preventing accidental use on older hardware.