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  1. JDK
  2. JDK-7074799

4.2: Adopt IEEE 754-2019 terminology in JLS

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    • Enhancement
    • Resolution: Fixed
    • P4
    • 15
    • 14
    • specification

    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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          relates to

          Bug - A problem which impairs or prevents the functions of the product. JDK-8240465 3.10.2: Improve information about min/max FP literals

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Enhancement - null JDK-8240624 Note mapping of RoundingMode constants to equivalent IEEE 754-2019 policy

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Enhancement - null JDK-8261366 Add discussion of IEEE 754 to BigDecimal

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Enhancement - null JDK-8240327 2.8: Adopt IEEE 754-2019 terminology in JVMS

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Enhancement - null JDK-8273346 Expand library mappings to IEEE 754 operations

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          CSR - null JDK-8261116 Note differences between IEEE 754-2019 math lib special cases and java.lang.Math

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed

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              darcy Joe Darcy
              darcy Joe Darcy
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