Landing: ed04be2c33fa
Project / Subsystem
gcc / i386
Date
2026-07-28
Author
Haochen Jiang
Commit
ed04be2c33faaf19d14521f8e6959b12a812701a
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- i386
- patch_id
- —
- commit_hash
- ed04be2c33faaf19d14521f8e6959b12a812701a
- source_type
- github
- headline
- i386: Correct vdpbf16ps mask usage
- tldr
- Fixes incorrect mask usage for 512-bit vdpbf16ps instructions on i386.
- author
- Haochen Jiang
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • i386
- • avx512
- • optimization
- • instruction-selection
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-07-28T00:00:00.000Z
This commit corrects an issue with the 512-bit vdpbf16ps instruction on i386 architectures where it was incorrectly using a 16-bit mask, considering only the lower 8 bits due to avx512fhalfmaskmode. The fix changes the pattern to use avx512fmaskmode and removes unused iterators and patterns. 256-bit and 128-bit variants were unaffected as they correctly use 8-bit masks.