Landing: 263ce2e907f7

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Project / Subsystem

gcc / aarch64

Date

2026-08-02

Author

Kyrylo Tkachov

Commit

263ce2e907f72273abf246e923d7530894f25281

Source

github

Perf win

No

Breaking

No

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All attributes

project: gcc
subsystem: aarch64
patch_id: —
commit_hash: 263ce2e907f72273abf246e923d7530894f25281
source_type: github
headline: Support FCCMP and FCCMPE for _Float16
tldr: GCC now supports half-precision floating-point conditional comparisons on AArch64.
author: Kyrylo Tkachov
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • aarch64
• floating-point
• arm
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/263ce2e907f72273abf246e923d7530894f25281
date: 2026-08-02T00:00:00.000Z

This commit adds support for half-precision floating-point conditional compare instructions (FCCMP and FCCMPE) on the AArch64 architecture when the FEAT_FP16 extension is available. Previously, these instructions only supported single-precision and double-precision types. The change updates the conditional-compare patterns and expansion hooks to correctly handle HFmode (_Float16) and improves code generation for comparisons involving half-precision floats. New test cases verify the functionality.