Landing: 4790838765e8

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Project / Subsystem

gcc / rs6000

Date

2026-07-07

Author

Kishan Parmar

Commit

4790838765e8a4b0580b11ba0d8c6671d7c3fc95

Source

github

Perf win

Yes

Breaking

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All attributes

project: gcc
subsystem: rs6000
patch_id: —
commit_hash: 4790838765e8a4b0580b11ba0d8c6671d7c3fc95
source_type: github
headline: rs6000 adds vector uncompress/unpack builtins for -mcpu=future
tldr: New vector uncompress and unpack intrinsics for rs6000 with -mcpu=future, supporting proposed Power processor instructions.
author: Kishan Parmar
outcome: committed
performance_win: true
breaking_change: false
series_id: —
series_parts: []
tags: • rs6000
• powerpc
• simd
• builtins
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/4790838765e8a4b0580b11ba0d8c6671d7c3fc95
date: 2026-07-07T00:00:00.000Z

The rs6000 backend now supports proposed vector uncompress and unpack instructions for future Power processors, enabled by the -mcpu=future flag. This includes new RTL patterns, builtin function definitions, and overloaded interfaces for operations like vec_uncompresshn and vec_unpack_hsn_to_byte. These additions provide access to new SIMD capabilities, though the builtin names may change in the future.