Landing: da222271bcd2

← All landings

Project / Subsystem

gcc / or1k

Date

2026-06-04

Author

Stafford Horne

Commit

da222271bcd25927f1641dd6970b4736a42cba43

Source

github

Perf win

Breaking

View on GitHub →

All attributes

project: gcc
subsystem: or1k
patch_id: —
commit_hash: da222271bcd25927f1641dd6970b4736a42cba43
source_type: github
headline: OpenRISC fixes 64-bit shift operations in GCC
tldr: GCC for OpenRISC now correctly handles 64-bit shift operations by defining `SHIFT_COUNT_TRUNCATED` and correcting shift amount predicates.
author: Stafford Horne
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • or1k
• bugfix
• code_generation
• bit_manipulation
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/da222271bcd25927f1641dd6970b4736a42cba43
date: 2026-06-04T00:00:00.000Z

This commit resolves long-standing issues with 64-bit shift operations on the OpenRISC architecture within GCC. The fix involves defining SHIFT_COUNT_TRUNCATED to signal that shift amounts are limited to the low 5 bits, as expected by the hardware. Additionally, the predicate for 32-bit shift immediate operands was corrected from six to five bits, ensuring proper code generation for all shift instructions.