JDK-7074799 : 4.2: Adopt IEEE 754-2019 terminology in JLS
- Type: Enhancement
- Component: specification
- Sub-Component: language
- Affected Version: 14
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- Submitted: 2011-08-04
- Updated: 2021-09-03
- Resolved: 2020-05-01
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| JDK 15 |
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15Fixed  |
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Description
The venerable IEEE 754 floating-point standard from 1985 was retired and replaced with a revised standard from 2008 and a further revision in 2019. The Java Language Specification rules of floating-point should be reviewed to account for updates in the standard for terminology, etc.
The terminology changes include between IEEE 754 1985 and 2019 include:
* IEEE 754 Standard for Binary Floating-Point Arithmetic -> IEEE 754 Standard for Floating-Point Arithmetic
* single -> binary32 ("single" in the context of IEEE 754-1985 single format specifically)
* double -> binary64 ("double" in the context of IEEE 754-1985 double format specifically)
* denormalized -> subnormal
* round to nearest mode -> roundTiesToEven mode
* round towards zero mode -> roundTowardZero mode
The terms "binary32" and "binary64" are not typographically distinguished in any way in the IEEE 754-2019 specification.
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