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Remove the _fpclass code from floating point hash.

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[SVN r42416]
This commit is contained in:
Daniel James
2008-01-02 18:08:43 +00:00
parent 727cacbc17
commit c84ac7de10
1 changed files with 2 additions and 29 deletions
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31
include/boost/functional/detail/hash_float.hpp
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@@ -38,7 +38,7 @@
// STLport
#elif defined(__SGI_STL_PORT) || defined(_STLPORT_VERSION)
// _fpclass and fpclassify aren't good enough on STLport.
// fpclassify aren't good enough on STLport.
// GNU libstdc++ 3
#elif defined(__GLIBCPP__) || defined(__GLIBCXX__)
@@ -50,12 +50,7 @@
// Dinkumware Library, on Visual C++
#elif (defined(_YVALS) && !defined(__IBMCPP__)) || defined(_CPPLIB_VER)
// Not using _fpclass because it causes a warning about a conversion
// from 'long double' to 'double'. Pity.
//
//# if defined(BOOST_MSVC)
//# define BOOST_HASH_USE_FPCLASS
//# endif
// Not using _fpclass because it is only available for double.
#endif
@@ -160,28 +155,6 @@ namespace boost
BOOST_ASSERT(0);
return 0;
}
#elif defined(BOOST_HASH_USE_FPCLASS)
switch(_fpclass(v)) {
case _FPCLASS_NZ:
case _FPCLASS_PZ:
return 0;
case _FPCLASS_PINF:
return (std::size_t)(-1);
case _FPCLASS_NINF:
return (std::size_t)(-2);
case _FPCLASS_SNAN:
case _FPCLASS_QNAN:
return (std::size_t)(-3);
case _FPCLASS_NN:
case _FPCLASS_ND:
return float_hash_impl(v);
case _FPCLASS_PD:
case _FPCLASS_PN:
return float_hash_impl(v);
default:
BOOST_ASSERT(0);
return 0;
}
#else
return v == 0 ? 0 : float_hash_impl(v);
#endif