33 lines
614 B
C++
33 lines
614 B
C++
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// This file is part of the mcl project.
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// Copyright (c) 2022 merryhime
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// SPDX-License-Identifier: MIT
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// Reference: http://jonkagstrom.com/bit-mixer-construction/
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#pragma once
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#include <functional>
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#include "mcl/bit/rotate.hpp"
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#include "mcl/stdint.hpp"
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namespace mcl::hash {
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constexpr size_t xmrx(size_t x)
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{
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x ^= x >> 32;
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x *= 0xff51afd7ed558ccd;
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x ^= bit::rotate_right(x, 47) ^ bit::rotate_right(x, 23);
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return x;
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}
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template<typename T>
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struct avalanche_xmrx {
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size_t operator()(const T& value)
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{
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return xmrx(std::hash<T>{}(value));
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}
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};
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} // namespace mcl::hash
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