Landing: 8d287bd70446

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Project / Subsystem

gcc / libstdc++

Date

2026-05-05

Author

Jonathan Wakely

Commit

8d287bd70446e5ec3b0eb909d32d03dd65c67bae

Source

github

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Breaking

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All attributes

project: gcc
subsystem: libstdc++
patch_id: —
commit_hash: 8d287bd70446e5ec3b0eb909d32d03dd65c67bae
source_type: github
headline: Fixes experimental::__is_x86_pd() in libstdc++.
tldr: Corrects macro names and refactors experimental x86 SIMD detection in libstdc++.
author: Jonathan Wakely
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • libstdc++
• simd
• x86
• bugfix
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/8d287bd70446e5ec3b0eb909d32d03dd65c67bae
date: 2026-05-05T00:00:00.000Z

This commit fixes macro names and refactors the __is_x86_pd() macro in the experimental SIMD (Single Instruction, Multiple Data) support of the C++ standard library (libstdc++). The changes aim to reduce instantiations and improve the reliability of x86 platform detection for SIMD operations. This ensures that the library correctly identifies and utilizes the appropriate SIMD instructions on x86 processors.