Landing: ea0f94f1737e

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Project / Subsystem

gcc / aarch64

Date

2026-09-05

Author

Artemiy Volkov

Commit

ea0f94f1737e44f58a30ddedb3a76bca4d30ce2c

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: aarch64
patch_id: —
commit_hash: ea0f94f1737e44f58a30ddedb3a76bca4d30ce2c
source_type: github
headline: Fix FP16 combine patterns for aarch64, preventing assembly failures.
tldr: Corrects aarch64 assembly generation for FP16 types, avoiding failures when the fp16 extension is not enabled.
author: Artemiy Volkov
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • aarch64
• compiler
• assembly
• fp16
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/ea0f94f1737e44f58a30ddedb3a76bca4d30ce2c
date: 2026-09-05T00:00:00.000Z

This commit addresses an issue on aarch64 where the combinez patterns for scalar and partial vector FP16 types incorrectly used the FMOV instruction even when the fp16 extension was not available. This led to assembly failures. The fix specializes these patterns for HF and BF modes and uses the INS instruction as a fallback, resolving the bug reported in PR126983.