Talk:Decimal128 floating-point format
From Wikipedia, the free encyclopedia
 | This article is rated C-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||
| |||||||||||||||||
G Combination field for BID vs DPD
The G combination field encodes exponent + hi 4 bits of significand + special values. The article currently describes one encoding/layout for the G combination field at the beginning of the article and seems to imply that this bit layout applies to both BID and DPD significand format.
In fact IEEE 754-2008/2019 specifies two different bit layouts for the G combination field for BID vs DPD formats. The G combination field is described again under the "significand field" descriptions, but those sections are really describing more than just the significand field.
The existing table showing G combination field is a good presentation and makes it understandable, but it only applies to the BID format.
I'm not an experienced wikipedia editor, so looking for guidance/assistance/encouragement.
Proposed fix:
- Move the current G combination field layout table under BID, incorporating existing G combination field description under BID
- Add a parallel layout table under DPD encoding
Sources:
- IEEE Std 754-2019, section [3.5.2] Encodings, pages 20-21
- IEEE Std 754-2008, section [3.5.2] Encodings, pages 10-11
MiguelDecimal128 (talk) 11:18, 1 September 2025 (UTC)