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Microoptimization to reduce the number of branches in 128-bit operator==.

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Andrey Semashev
2018-02-10 17:19:03 +03:00
parent 8e7ea418ba
commit 35497819a6
1 changed files with 1 additions and 1 deletions
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include/boost/atomic/detail/storage_type.hpp
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@@ -164,7 +164,7 @@ struct BOOST_ATOMIC_DETAIL_MAY_ALIAS storage128_t
BOOST_FORCEINLINE bool operator== (storage128_t const& left, storage128_t const& right) BOOST_NOEXCEPT
{
return left.data[0] == right.data[0] && left.data[1] == right.data[1];
return ((left.data[0] ^ right.data[0]) | (left.data[1] ^ right.data[1])) == 0u;
}
BOOST_FORCEINLINE bool operator!= (storage128_t const& left, storage128_t const& right) BOOST_NOEXCEPT
{