Landing: aacccc01d2bb
Project / Subsystem
gcc / fortran
Date
2026-05-24
Author
Jerry DeLisle
Commit
aacccc01d2bb3dd76ee37281b9f2f04aa9c13f5c
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- fortran
- patch_id
- —
- commit_hash
- aacccc01d2bb3dd76ee37281b9f2f04aa9c13f5c
- source_type
- github
- headline
- Fortran: Add EX Format Rounding for Truncated Hex Mantissa
- tldr
- Implements proper rounding of the hex mantissa in Fortran's EX format, supporting all rounding modes and normalization.
- author
- Jerry DeLisle
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • fortran
- • rounding
- • io
- • formatting
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-05-24T00:00:00.000Z
This commit enhances Fortran’s EX format to correctly round the hexadecimal mantissa when the user specifies a precision smaller than the full precision. It implements all Fortran rounding modes, including ties-to-even, ties away from zero, round up, round down, and round to zero. The implementation also handles carry propagation and normalizes the output by adjusting the exponent when incrementing a mantissa causes it to overflow.