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Revert reversion of 32 bit mulx multiplier

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This commit is contained in:
Peter Dimov
2023-01-30 20:03:01 +02:00
parent cafa1f2278
commit a74962bc3c
1 changed files with 3 additions and 1 deletions
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4
include/boost/unordered/detail/mulx.hpp
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@ -107,11 +107,13 @@ inline std::size_t mulx( std::size_t x ) noexcept
{ {
#if defined(BOOST_UNORDERED_64B_ARCHITECTURE) #if defined(BOOST_UNORDERED_64B_ARCHITECTURE)
// multiplier is phi
return (std::size_t)mulx64( (boost::uint64_t)x, 0x9E3779B97F4A7C15ull ); return (std::size_t)mulx64( (boost::uint64_t)x, 0x9E3779B97F4A7C15ull );
#else /* 32 bits assumed */ #else /* 32 bits assumed */
return mulx32( x, 0x9E3779B9u ); // multiplier from https://arxiv.org/abs/2001.05304
return mulx32( x, 0xE817FB2Du );
#endif #endif
} }