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GCC 32 bit under Windows has an 80 bit long double in 12 bytes, not 16

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This commit is contained in:
Peter Dimov
2021-10-17 16:17:44 +03:00
parent 3487450f62
commit aaa1f441ac
1 changed files with 18 additions and 1 deletions
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19
include/boost/container_hash/hash.hpp
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@@ -150,7 +150,24 @@ namespace boost
} }
}; };
// 80 bit long double // 80 bit long double in 12 bytes
template<class T> struct hash_float_impl<T, 96, 64>
{
static std::size_t fn( T v )
{
boost::uint64_t w[ 2 ] = {};
std::memcpy( &w, &v, 80 / CHAR_BIT );
std::size_t seed = 0;
boost::hash_combine( seed, w[ 0 ] );
boost::hash_combine( seed, w[ 1 ] );
return seed;
}
};
// 80 bit long double in 16 bytes
template<class T> struct hash_float_impl<T, 128, 64> template<class T> struct hash_float_impl<T, 128, 64>
{ {
static std::size_t fn( T v ) static std::size_t fn( T v )