Landing: 07e78425476e
Project / Subsystem
gcc / avr
Date
2026-07-25
Author
Georg-Johann Lay
Commit
07e78425476eb1054d7e0973d6ef39ba73b62821
Source
github
Perf win
Yes
Breaking
No
All attributes
- project
- gcc
- subsystem
- avr
- patch_id
- —
- commit_hash
- 07e78425476eb1054d7e0973d6ef39ba73b62821
- source_type
- github
- headline
- AVR: Add __negdi2_r10 to libgcc.
- tldr
- AVR target gets a new libgcc function for 64-bit negation to simplify existing operations.
- author
- Georg-Johann Lay
- outcome
- committed
- performance_win
- true
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • avr
- • libgcc
- • 64-bit arithmetic
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-07-25T00:00:00.000Z
This patch adds the __negdi2_r10 function to libgcc for the AVR target. It also tidies up some 64-bit negation operations, using the new function where applicable in __divdi3_moddi3 and __mulQ64_work. This improves the handling of 64-bit arithmetic on AVR.