/*
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[auto_generated]
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boost/numeric/odeint/external/compute/compute_operations.hpp
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[begin_description]
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Operations of Boost.Compute zipped iterators. Is the counterpart of the compute_algebra.
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[end_description]
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Copyright 2009-2011 Karsten Ahnert
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Copyright 2009-2011 Mario Mulansky
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or
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copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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#ifndef BOOST_NUMERIC_ODEINT_EXTERNAL_COMPUTE_COMPUTE_OPERATIONS_HPP_DEFINED
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#define BOOST_NUMERIC_ODEINT_EXTERNAL_COMPUTE_COMPUTE_OPERATIONS_HPP_DEFINED
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#include <boost/preprocessor/repetition.hpp>
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#include <boost/compute.hpp>
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namespace boost {
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namespace numeric {
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namespace odeint {
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struct compute_operations {
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#define BOOST_ODEINT_COMPUTE_TEMPL_FAC(z, n, unused) \
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, class Fac ## n = BOOST_PP_CAT(Fac, BOOST_PP_DEC(n))
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#define BOOST_ODEINT_COMPUTE_MEMB_FAC(z, n, unused) \
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const Fac ## n m_alpha ## n;
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#define BOOST_ODEINT_COMPUTE_PRM_FAC(z, n, unused) \
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BOOST_PP_COMMA_IF(n) const Fac ## n alpha ## n
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#define BOOST_ODEINT_COMPUTE_INIT_FAC(z, n, unused) \
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BOOST_PP_COMMA_IF(n) m_alpha ## n (alpha ## n)
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#define BOOST_ODEINT_COMPUTE_PRM_STATE(z, n, unused) \
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BOOST_PP_COMMA_IF(n) StateType ## n &s ## n
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#define BOOST_ODEINT_COMPUTE_BEGIN_STATE(z, n, unused) \
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BOOST_PP_COMMA_IF( BOOST_PP_DEC(n) ) s ## n.begin()
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#define BOOST_ODEINT_COMPUTE_END_STATE(z, n, unused) \
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BOOST_PP_COMMA_IF( BOOST_PP_DEC(n) ) s ## n.end()
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#define BOOST_ODEINT_COMPUTE_LAMBDA(z, n, unused) \
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BOOST_PP_EXPR_IF(n, +) m_alpha ## n * bc::lambda::get< n >(bc::_1)
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#define BOOST_ODEINT_COMPUTE_OPERATIONS(z, n, unused) \
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template< \
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class Fac0 = double \
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BOOST_PP_REPEAT_FROM_TO(1, n, BOOST_ODEINT_COMPUTE_TEMPL_FAC, ~) \
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> \
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struct scale_sum ## n { \
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BOOST_PP_REPEAT(n, BOOST_ODEINT_COMPUTE_MEMB_FAC, ~) \
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scale_sum ## n( \
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BOOST_PP_REPEAT(n, BOOST_ODEINT_COMPUTE_PRM_FAC, ~) \
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) \
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: BOOST_PP_REPEAT(n, BOOST_ODEINT_COMPUTE_INIT_FAC, ~) \
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{ } \
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template< BOOST_PP_ENUM_PARAMS(BOOST_PP_INC(n), class StateType) > \
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void operator()( \
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BOOST_PP_REPEAT( \
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BOOST_PP_INC(n), \
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BOOST_ODEINT_COMPUTE_PRM_STATE, ~) \
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) const \
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{ \
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namespace bc = boost::compute; \
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bc::transform( \
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bc::make_zip_iterator( \
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boost::make_tuple( \
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BOOST_PP_REPEAT_FROM_TO( \
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1, BOOST_PP_INC(n), \
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BOOST_ODEINT_COMPUTE_BEGIN_STATE, ~) \
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) \
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), \
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bc::make_zip_iterator( \
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boost::make_tuple( \
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BOOST_PP_REPEAT_FROM_TO( \
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1, BOOST_PP_INC(n), \
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BOOST_ODEINT_COMPUTE_END_STATE, ~) \
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) \
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), \
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s0.begin(), \
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BOOST_PP_REPEAT(n, BOOST_ODEINT_COMPUTE_LAMBDA, ~) \
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); \
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} \
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};
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BOOST_PP_REPEAT_FROM_TO(2, 8, BOOST_ODEINT_COMPUTE_OPERATIONS, ~)
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#undef BOOST_ODEINT_COMPUTE_TEMPL_FAC
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#undef BOOST_ODEINT_COMPUTE_MEMB_FAC
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#undef BOOST_ODEINT_COMPUTE_PRM_FAC
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#undef BOOST_ODEINT_COMPUTE_INIT_FAC
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#undef BOOST_ODEINT_COMPUTE_PRM_STATE
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#undef BOOST_ODEINT_COMPUTE_BEGIN_STATE
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#undef BOOST_ODEINT_COMPUTE_END_STATE
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#undef BOOST_ODEINT_COMPUTE_LAMBDA
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#undef BOOST_ODEINT_COMPUTE_OPERATIONS
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template<class Fac1 = double, class Fac2 = Fac1>
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struct scale_sum_swap2 {
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const Fac1 m_alpha1;
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const Fac2 m_alpha2;
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scale_sum_swap2(const Fac1 alpha1, const Fac2 alpha2)
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: m_alpha1(alpha1), m_alpha2(alpha2) { }
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template<class State0, class State1, class State2>
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void operator()(State0 &s0, State1 &s1, State2 &s2) const {
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namespace bc = boost::compute;
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bc::command_queue &queue = bc::system::default_queue();
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const bc::context &context = queue.get_context();
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const char source[] = BOOST_COMPUTE_STRINGIZE_SOURCE(
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kernel void scale_sum_swap2(
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F1 a1, F2 a2,
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global T0 *x0, global T1 *x1, global T2 *x2,
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)
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{
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uint i = get_global_id(0);
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T0 tmp = x0[i];
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x0[i] = a1 * x1[i] + a2 * x2[i];
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x1[i] = tmp;
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}
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);
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std::stringstream options;
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options
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<< " -DT0=" << bc::type_name<typename State0::value_type>()
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<< " -DT1=" << bc::type_name<typename State1::value_type>()
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<< " -DT2=" << bc::type_name<typename State2::value_type>()
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<< " -DF1=" << bc::type_name<Fac1>()
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<< " -DF2=" << bc::type_name<Fac2>();
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bc::program program =
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bc::program::build_with_source(source, context, options.str());
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bc::kernel kernel(program, "scale_sum_swap2");
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kernel.set_arg(0, m_alpha1);
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kernel.set_arg(1, m_alpha2);
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kernel.set_arg(2, s0.get_buffer());
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kernel.set_arg(3, s1.get_buffer());
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kernel.set_arg(4, s2.get_buffer());
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queue.enqueue_1d_range_kernel(kernel, 0, s0.size());
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}
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};
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template<class Fac1 = double>
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struct rel_error {
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const Fac1 m_eps_abs, m_eps_rel, m_a_x, m_a_dxdt;
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rel_error(const Fac1 eps_abs, const Fac1 eps_rel, const Fac1 a_x, const Fac1 a_dxdt)
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: m_eps_abs(eps_abs), m_eps_rel(eps_rel), m_a_x(a_x), m_a_dxdt(a_dxdt) { }
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template <class State0, class State1, class State2>
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void operator()(State0 &s0, State1 &s1, State2 &s2) const {
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namespace bc = boost::compute;
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using bc::_1;
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using bc::lambda::get;
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bc::for_each(
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bc::make_zip_iterator(
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boost::make_tuple(
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s0.begin(),
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s1.begin(),
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s2.begin()
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)
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),
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bc::make_zip_iterator(
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boost::make_tuple(
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s0.end(),
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s1.end(),
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s2.end()
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)
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),
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get<0>(_1) = abs( get<0>(_1) ) /
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(m_eps_abs + m_eps_rel * (m_a_x * abs(get<1>(_1) + m_a_dxdt * abs(get<2>(_1)))))
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);
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}
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};
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};
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} // odeint
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} // numeric
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} // boost
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#endif // BOOST_NUMERIC_ODEINT_EXTERNAL_COMPUTE_COMPUTE_OPERATIONS_HPP_DEFINED
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