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Revert "Update mulx multipliers"

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This reverts commit 9bc471310e.
This commit is contained in:
Peter Dimov
2023-01-30 10:17:12 +02:00
parent 40d5097d99
commit cafa1f2278
1 changed files with 2 additions and 4 deletions
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6
include/boost/unordered/detail/mulx.hpp
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@ -103,17 +103,15 @@ inline boost::uint32_t mulx32( boost::uint32_t x, boost::uint32_t y )
#endif #endif
#endif #endif
// multipliers from https://arxiv.org/abs/2001.05304
inline std::size_t mulx( std::size_t x ) noexcept inline std::size_t mulx( std::size_t x ) noexcept
{ {
#if defined(BOOST_UNORDERED_64B_ARCHITECTURE) #if defined(BOOST_UNORDERED_64B_ARCHITECTURE)
return (std::size_t)mulx64( (boost::uint64_t)x, 0xDEFBA91144F2B375ull ); return (std::size_t)mulx64( (boost::uint64_t)x, 0x9E3779B97F4A7C15ull );
#else /* 32 bits assumed */ #else /* 32 bits assumed */
return mulx32( x, 0xE817FB2Du ); return mulx32( x, 0x9E3779B9u );
#endif #endif
} }