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From "Martin Sebor (JIRA)" <j...@apache.org>
Subject [jira] Updated: (STDCXX-819) [MSVC] numeric_limits::quiet_NaN() and signaling_NaN() bits differ from native STL
Date Thu, 29 May 2008 21:23:46 GMT

     [ https://issues.apache.org/jira/browse/STDCXX-819?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Martin Sebor updated STDCXX-819:
--------------------------------

         Fix Version/s:     (was: 4.3)
                        4.2.2
    Remaining Estimate: 4h
     Original Estimate: 4h

Rescheduled for 4.2.2.

> [MSVC] numeric_limits::quiet_NaN() and signaling_NaN() bits differ from native STL
> ----------------------------------------------------------------------------------
>
>                 Key: STDCXX-819
>                 URL: https://issues.apache.org/jira/browse/STDCXX-819
>             Project: C++ Standard Library
>          Issue Type: Bug
>          Components: 18. Language Support
>    Affects Versions: 4.1.2, 4.1.3, 4.1.4, 4.2.0
>         Environment: MSVC and ICC/Windows
>            Reporter: Farid Zaripov
>            Assignee: Martin Sebor
>            Priority: Minor
>             Fix For: 4.2.2
>
>   Original Estimate: 4h
>  Remaining Estimate: 4h
>
> The binary representation of NAN's in stdcxx:
> {noformat}
> #define _RWSTD_FLT_QNAN_BITS  { 0, 0, '\xc0', '\xff' }
> #define _RWSTD_FLT_SNAN_BITS  { '\x1', 0, '\x80', '\x7f' }
> #define _RWSTD_DBL_QNAN_BITS  { 0, 0, 0, 0, 0, 0, '\xf8', '\xff' }
> #define _RWSTD_DBL_SNAN_BITS  { '\x1', 0, 0, 0, 0, 0, '\xf0', '\x7f' }
> #define _RWSTD_LDBL_QNAN_BITS  { 0, 0, 0, 0, 0, 0, '\xf8', '\xff' }
> #define _RWSTD_LDBL_SNAN_BITS  { '\x1', 0, 0, 0, 0, 0, '\xf0', '\x7f' }
> {noformat}
> The binary representation of the same things in MSVC STL:
> {noformat}
> #define _RWSTD_FLT_QNAN_BITS  { 0, 0, '\xc0', '\x7f' }
> #define _RWSTD_FLT_SNAN_BITS  { '\x1', 0, '\xc0', '\x7f' }
> #define _RWSTD_DBL_QNAN_BITS  { 0, 0, 0, 0, 0, 0, '\xf8', '\x7f' }
> #define _RWSTD_DBL_SNAN_BITS  { '\x1', 0, 0, 0, 0, 0, '\xf8', '\x7f' }
> #define _RWSTD_LDBL_QNAN_BITS  { 0, 0, 0, 0, 0, 0, '\xf8', '\x7f' }
> #define _RWSTD_LDBL_SNAN_BITS  { '\x1', 0, 0, 0, 0, 0, '\xf8', '\x7f' }
> {noformat}

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