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  1. JDK
  2. JDK-4294714

fdlibm uses HI/LO macros which depend on pointer aliasing - portability issue

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Details

    • Bug
    • Resolution: Cannot Reproduce
    • P5
    • tbd
    • 1.3.0
    • core-libs
    • generic
    • generic

    Description

      fdlibm 5.2 uses HI and LO macros which depend on pointer aliasing :-


      #ifdef __LITTLE_ENDIAN
      #define __HI(x) *(1+(int*)&x)
      #define __LO(x) *(int*)&x
      #define __HIp(x) *(1+(int*)x)
      #define __LOp(x) *(int*)x
      #else
      #define __HI(x) *(int*)&x
      #define __LO(x) *(1+(int*)&x)
      #define __HIp(x) *(int*)x
      #define __LOp(x) *(1+(int*)x)
      #endif

      Compilers such as GCC 2.95 are senstive compared to old versions
      of GCC and thus can't handle these macros as intended.

      From a portability perspective it would be good to replace these
      macros in a future Java 2 release.
      ###@###.### 2004-11-11 22:24:08 GMT

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          relates to

          Sub-task - The sub-task of the issue JDK-8303798 REDO - Remove fdlibm C sources

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

          Sub-task - The sub-task of the issue JDK-8302801 Remove fdlibm C sources

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-4141677 The spec for java.lang.Math should not be written in C.

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-4378241 fdlibm.h requires define __LITTLE_ENDIAN instead of _LITTLE_ENDIAN

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-6989117 fdlibm compiler warning messages

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

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              darcy Joe Darcy
              alanb Alan Bateman
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