[_MSC_VER] Binary representation of the numeric_limits<>::quiet_NaN() and
numeric_limits<>::signaling_NaN() is different from binary representation in
native STL
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Key: STDCXX-819
URL: https://issues.apache.org/jira/browse/STDCXX-819
Project: C++ Standard Library
Issue Type: Bug
Components: 26. Numerics
Affects Versions: 4.2.0, 4.1.4, 4.1.3, 4.1.2
Environment: MSVC and ICC/Windows
Reporter: Farid Zaripov
Fix For: 4.2.1
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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