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/*
* Copyright 2008-2021 NVIDIA Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <thrust/detail/config.h>
#include <thrust/random/xor_combine_engine.h>
#include <thrust/random/detail/random_core_access.h>
THRUST_NAMESPACE_BEGIN
namespace random
{
template<typename Engine1, size_t s1,
typename Engine2, size_t s2>
__host__ __device__
xor_combine_engine<Engine1,s1,Engine2,s2>
::xor_combine_engine(void)
:m_b1(),m_b2()
{
} // end xor_combine_engine::xor_combine_engine()
template<typename Engine1, size_t s1,
typename Engine2, size_t s2>
__host__ __device__
xor_combine_engine<Engine1,s1,Engine2,s2>
::xor_combine_engine(const base1_type &urng1, const base2_type &urng2)
:m_b1(urng1),m_b2(urng2)
{
} // end xor_combine_engine::xor_combine_engine()
template<typename Engine1, size_t s1,
typename Engine2, size_t s2>
__host__ __device__
xor_combine_engine<Engine1,s1,Engine2,s2>
::xor_combine_engine(result_type s)
:m_b1(s),m_b2(s)
{
} // end xor_combine_engine::xor_combine_engine()
template<typename Engine1, size_t s1,
typename Engine2, size_t s2>
__host__ __device__
void xor_combine_engine<Engine1,s1,Engine2,s2>
::seed(void)
{
m_b1.seed();
m_b2.seed();
} // end xor_combine_engine::seed()
template<typename Engine1, size_t s1,
typename Engine2, size_t s2>
__host__ __device__
void xor_combine_engine<Engine1,s1,Engine2,s2>
::seed(result_type s)
{
m_b1.seed(s);
m_b2.seed(s);
} // end xor_combine_engine::seed()
template<typename Engine1, size_t s1,
typename Engine2, size_t s2>
__host__ __device__
const typename xor_combine_engine<Engine1,s1,Engine2,s2>::base1_type &
xor_combine_engine<Engine1,s1,Engine2,s2>
::base1(void) const
{
return m_b1;
} // end xor_combine_engine::base1()
template<typename Engine1, size_t s1,
typename Engine2, size_t s2>
__host__ __device__
const typename xor_combine_engine<Engine1,s1,Engine2,s2>::base2_type &
xor_combine_engine<Engine1,s1,Engine2,s2>
::base2(void) const
{
return m_b2;
} // end xor_combine_engine::base2()
template<typename Engine1, size_t s1,
typename Engine2, size_t s2>
__host__ __device__
typename xor_combine_engine<Engine1,s1,Engine2,s2>::result_type
xor_combine_engine<Engine1,s1,Engine2,s2>
::operator()(void)
{
return (result_type(m_b1() - base1_type::min) << shift1) ^
(result_type(m_b2() - base2_type::min) << shift2);
} // end xor_combine_engine::operator()()
template<typename Engine1, size_t s1,
typename Engine2, size_t s2>
__host__ __device__
void xor_combine_engine<Engine1, s1, Engine2, s2>
::discard(unsigned long long z)
{
for(; z > 0; --z)
{
this->operator()();
} // end for
} // end xor_combine_engine::discard()
template<typename Engine1, size_t s1, typename Engine2, size_t s2>
template<typename CharT, typename Traits>
std::basic_ostream<CharT,Traits>& xor_combine_engine<Engine1,s1,Engine2,s2>
::stream_out(std::basic_ostream<CharT,Traits> &os) const
{
typedef std::basic_ostream<CharT,Traits> ostream_type;
typedef typename ostream_type::ios_base ios_base;
// save old flags and fill character
const typename ios_base::fmtflags flags = os.flags();
const CharT fill = os.fill();
const CharT space = os.widen(' ');
os.flags(ios_base::dec | ios_base::fixed | ios_base::left);
os.fill(space);
// output each base engine in turn
os << base1() << space << base2();
// restore old flags and fill character
os.flags(flags);
os.fill(fill);
return os;
}
template<typename Engine1, size_t s1, typename Engine2, size_t s2>
template<typename CharT, typename Traits>
std::basic_istream<CharT,Traits>& xor_combine_engine<Engine1,s1,Engine2,s2>
::stream_in(std::basic_istream<CharT,Traits> &is)
{
typedef std::basic_istream<CharT,Traits> istream_type;
typedef typename istream_type::ios_base ios_base;
// save old flags
const typename ios_base::fmtflags flags = is.flags();
is.flags(ios_base::skipws);
// input each base engine in turn
is >> m_b1 >> m_b2;
// restore old flags
is.flags(flags);
return is;
}
template<typename Engine1, size_t s1, typename Engine2, size_t s2>
__host__ __device__
bool xor_combine_engine<Engine1,s1,Engine2,s2>
::equal(const xor_combine_engine<Engine1,s1,Engine2,s2> &rhs) const
{
return (m_b1 == rhs.m_b1) && (m_b2 == rhs.m_b2);
}
template<typename Engine1, size_t s1, typename Engine2, size_t s2,
typename CharT, typename Traits>
std::basic_ostream<CharT,Traits>&
operator<<(std::basic_ostream<CharT,Traits> &os,
const xor_combine_engine<Engine1,s1,Engine2,s2> &e)
{
return thrust::random::detail::random_core_access::stream_out(os,e);
}
template<typename Engine1, size_t s1, typename Engine2, size_t s2,
typename CharT, typename Traits>
std::basic_istream<CharT,Traits>&
operator>>(std::basic_istream<CharT,Traits> &is,
xor_combine_engine<Engine1,s1,Engine2,s2> &e)
{
return thrust::random::detail::random_core_access::stream_in(is,e);
}
template<typename Engine1, size_t s1, typename Engine2, size_t s2>
__host__ __device__
bool operator==(const xor_combine_engine<Engine1,s1,Engine2,s2> &lhs,
const xor_combine_engine<Engine1,s1,Engine2,s2> &rhs)
{
return thrust::random::detail::random_core_access::equal(lhs,rhs);
}
template<typename Engine1, size_t s1, typename Engine2, size_t s2>
__host__ __device__
bool operator!=(const xor_combine_engine<Engine1,s1,Engine2,s2> &lhs,
const xor_combine_engine<Engine1,s1,Engine2,s2> &rhs)
{
return !(lhs == rhs);
}
} // end random
THRUST_NAMESPACE_END
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