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// Copyright 2025 Christian Mazakas.
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/hash2/detail/mul128.hpp>
#include <boost/core/lightweight_test.hpp>
#include <climits>
void test( std::uint64_t x, std::uint64_t y, boost::hash2::detail::uint128 e )
{
auto r = boost::hash2::detail::mul128( x, y );
BOOST_TEST_EQ( r.low, e.low );
BOOST_TEST_EQ( r.high, e.high );
}
int main()
{
test( ULLONG_MAX, ULLONG_MAX, { 0x0000000000000001ull, 0xfffffffffffffffeull } );
test( 0, 0, { 0x0000000000000000ull, 0x0000000000000000ull } );
test( 1, 2, { 0x0000000000000002ull, 0x0000000000000000ull } );
test( 3, ULLONG_MAX, { 0xfffffffffffffffdull, 0x0000000000000002ull });
return boost::report_errors();
}
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