Chris@16: /*
Chris@16:  [auto_generated]
Chris@16:  boost/numeric/odeint/external/thrust/thrust_operations.hpp
Chris@16: 
Chris@16:  [begin_description]
Chris@16:  Operations of thrust zipped iterators. Is the counterpart of the thrust_algebra.
Chris@16:  [end_description]
Chris@16: 
Chris@101:  Copyright 2010-2013 Mario Mulansky
Chris@101:  Copyright 2010-2012 Karsten Ahnert
Chris@16: 
Chris@16:  Distributed under the Boost Software License, Version 1.0.
Chris@16:  (See accompanying file LICENSE_1_0.txt or
Chris@16:  copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  */
Chris@16: 
Chris@16: 
Chris@16: #ifndef BOOST_NUMERIC_ODEINT_EXTERNAL_THRUST_THRUST_OPERATIONS_HPP_INCLUDED
Chris@16: #define BOOST_NUMERIC_ODEINT_EXTERNAL_THRUST_THRUST_OPERATIONS_HPP_INCLUDED
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace numeric {
Chris@16: namespace odeint {
Chris@16: 
Chris@16: #include <thrust/tuple.h>
Chris@16: #include <thrust/iterator/zip_iterator.h>
Chris@16: 
Chris@16: /**ToDo extend to scale_sum13 for rk78 */
Chris@16: 
Chris@16: struct thrust_operations
Chris@16: {
Chris@16:     template< class Fac1 = double , class Fac2 = Fac1 >
Chris@16:     struct scale_sum2
Chris@16:     {
Chris@16:         const Fac1 m_alpha1;
Chris@16:         const Fac2 m_alpha2;
Chris@16: 
Chris@16:         scale_sum2( const Fac1 alpha1 , const Fac2 alpha2 )
Chris@16:         : m_alpha1( alpha1 ) , m_alpha2( alpha2 ) { }
Chris@16: 
Chris@16:         template< class Tuple >
Chris@16:         __host__ __device__
Chris@16:         void operator()( Tuple t ) const
Chris@16:         {
Chris@16:             thrust::get<0>(t) = m_alpha1 * thrust::get<1>(t) + m_alpha2 * thrust::get<2>(t);
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16:     template< class Fac1 = double , class Fac2 = Fac1 >
Chris@16:     struct scale_sum_swap2
Chris@16:     {
Chris@16:         const Fac1 m_alpha1;
Chris@16:         const Fac2 m_alpha2;
Chris@16: 
Chris@16:         scale_sum_swap2( const Fac1 alpha1 , const Fac2 alpha2 )
Chris@16:         : m_alpha1( alpha1 ) , m_alpha2( alpha2 ) { }
Chris@16: 
Chris@16:         template< class Tuple >
Chris@16:         __host__ __device__
Chris@16:         void operator()( Tuple t ) const
Chris@16:         {
Chris@16:             typename thrust::tuple_element<0,Tuple>::type tmp = thrust::get<0>(t);
Chris@16:             thrust::get<0>(t) = m_alpha1 * thrust::get<1>(t) + m_alpha2 * thrust::get<2>(t);
Chris@16:             thrust::get<1>(t) = tmp;
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16:     template< class Fac1 = double , class Fac2 = Fac1 , class Fac3 = Fac2 >
Chris@16:     struct scale_sum3
Chris@16:     {
Chris@16:         const Fac1 m_alpha1;
Chris@16:         const Fac2 m_alpha2;
Chris@16:         const Fac3 m_alpha3;
Chris@16: 
Chris@16:         scale_sum3( const Fac1 alpha1 , const Fac2 alpha2 , const Fac3 alpha3 )
Chris@16:         : m_alpha1( alpha1 ) , m_alpha2( alpha2 ) , m_alpha3( alpha3 ) { }
Chris@16: 
Chris@16:         template< class Tuple >
Chris@16:         __host__ __device__
Chris@16:         void operator()( Tuple t ) const
Chris@16:         {
Chris@16:             thrust::get<0>(t) = m_alpha1 * thrust::get<1>(t) +
Chris@16:                     m_alpha2 * thrust::get<2>(t) +
Chris@16:                     m_alpha3 * thrust::get<3>(t);
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16: 
Chris@16:     template< class Fac1 = double , class Fac2 = Fac1 , class Fac3 = Fac2 , class Fac4 = Fac3 >
Chris@16:     struct scale_sum4
Chris@16:     {
Chris@16:         const Fac1 m_alpha1;
Chris@16:         const Fac2 m_alpha2;
Chris@16:         const Fac3 m_alpha3;
Chris@16:         const Fac4 m_alpha4;
Chris@16: 
Chris@16:         scale_sum4( const Fac1 alpha1 , const Fac2 alpha2 , const Fac3 alpha3 , const Fac4 alpha4 )
Chris@16:         : m_alpha1( alpha1 ) , m_alpha2( alpha2 ) , m_alpha3( alpha3 ) , m_alpha4( alpha4 ){ }
Chris@16: 
Chris@16:         template< class Tuple >
Chris@16:         __host__ __device__
Chris@16:         void operator()( Tuple t ) const
Chris@16:         {
Chris@16:             thrust::get<0>(t) = m_alpha1 * thrust::get<1>(t) +
Chris@16:                     m_alpha2 * thrust::get<2>(t) +
Chris@16:                     m_alpha3 * thrust::get<3>(t) +
Chris@16:                     m_alpha4 * thrust::get<4>(t);
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16: 
Chris@16:     template< class Fac1 = double , class Fac2 = Fac1 , class Fac3 = Fac2 ,
Chris@16:             class Fac4 = Fac3 , class Fac5 = Fac4 >
Chris@16:     struct scale_sum5
Chris@16:     {
Chris@16:         const Fac1 m_alpha1;
Chris@16:         const Fac2 m_alpha2;
Chris@16:         const Fac3 m_alpha3;
Chris@16:         const Fac4 m_alpha4;
Chris@16:         const Fac5 m_alpha5;
Chris@16: 
Chris@16:         scale_sum5( const Fac1 alpha1 , const Fac2 alpha2 , const Fac3 alpha3 ,
Chris@16:                 const Fac4 alpha4 , const Fac5 alpha5 )
Chris@16:         : m_alpha1( alpha1 ) , m_alpha2( alpha2 ) , m_alpha3( alpha3 ) ,
Chris@16:           m_alpha4( alpha4 ) , m_alpha5( alpha5 ) { }
Chris@16: 
Chris@16:         template< class Tuple >
Chris@16:         __host__ __device__
Chris@16:         void operator()( Tuple t ) const
Chris@16:         {
Chris@16:             thrust::get<0>(t) = m_alpha1 * thrust::get<1>(t) +
Chris@16:                     m_alpha2 * thrust::get<2>(t) +
Chris@16:                     m_alpha3 * thrust::get<3>(t) +
Chris@16:                     m_alpha4 * thrust::get<4>(t) +
Chris@16:                     m_alpha5 * thrust::get<5>(t);
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16: 
Chris@16:     template< class Fac1 = double , class Fac2 = Fac1 , class Fac3 = Fac2 ,
Chris@16:             class Fac4 = Fac3 , class Fac5 = Fac4 , class Fac6 = Fac5 >
Chris@16:     struct scale_sum6
Chris@16:     {
Chris@16:         const Fac1 m_alpha1;
Chris@16:         const Fac2 m_alpha2;
Chris@16:         const Fac3 m_alpha3;
Chris@16:         const Fac4 m_alpha4;
Chris@16:         const Fac5 m_alpha5;
Chris@16:         const Fac6 m_alpha6;
Chris@16: 
Chris@16:         scale_sum6( const Fac1 alpha1 , const Fac2 alpha2 , const Fac3 alpha3 ,
Chris@16:                 const Fac4 alpha4 , const Fac5 alpha5 , const Fac6 alpha6 )
Chris@16:         : m_alpha1( alpha1 ) , m_alpha2( alpha2 ) , m_alpha3( alpha3 ) ,
Chris@16:           m_alpha4( alpha4 ) , m_alpha5( alpha5 ) , m_alpha6( alpha6 ) { }
Chris@16: 
Chris@16:         template< class Tuple >
Chris@16:         __host__ __device__
Chris@16:         void operator()( Tuple t ) const
Chris@16:         {
Chris@16:             thrust::get<0>(t) = m_alpha1 * thrust::get<1>(t) +
Chris@16:                     m_alpha2 * thrust::get<2>(t) +
Chris@16:                     m_alpha3 * thrust::get<3>(t) +
Chris@16:                     m_alpha4 * thrust::get<4>(t) +
Chris@16:                     m_alpha5 * thrust::get<5>(t) +
Chris@16:                     m_alpha6 * thrust::get<6>(t);
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16: 
Chris@16:     template< class Fac1 = double , class Fac2 = Fac1 , class Fac3 = Fac2 , class Fac4 = Fac3 ,
Chris@16:             class Fac5 = Fac4 , class Fac6 = Fac5 , class Fac7 = Fac6 >
Chris@16:     struct scale_sum7
Chris@16:     {
Chris@16:         const Fac1 m_alpha1;
Chris@16:         const Fac2 m_alpha2;
Chris@16:         const Fac3 m_alpha3;
Chris@16:         const Fac4 m_alpha4;
Chris@16:         const Fac5 m_alpha5;
Chris@16:         const Fac6 m_alpha6;
Chris@16:         const Fac7 m_alpha7;
Chris@16: 
Chris@16:         scale_sum7( const Fac1 alpha1 , const Fac2 alpha2 , const Fac3 alpha3 ,
Chris@16:                 const Fac4 alpha4 , const Fac5 alpha5 , const Fac6 alpha6 , const Fac7 alpha7 )
Chris@16:         : m_alpha1( alpha1 ) , m_alpha2( alpha2 ) , m_alpha3( alpha3 ) ,
Chris@16:           m_alpha4( alpha4 ) , m_alpha5( alpha5 ) , m_alpha6( alpha6 ) , m_alpha7( alpha7 ) { }
Chris@16: 
Chris@16:         template< class Tuple >
Chris@16:         __host__ __device__
Chris@16:         void operator()( Tuple t ) const
Chris@16:         {
Chris@16:             thrust::get<0>(t) = m_alpha1 * thrust::get<1>(t) +
Chris@16:                     m_alpha2 * thrust::get<2>(t) +
Chris@16:                     m_alpha3 * thrust::get<3>(t) +
Chris@16:                     m_alpha4 * thrust::get<4>(t) +
Chris@16:                     m_alpha5 * thrust::get<5>(t) +
Chris@16:                     m_alpha6 * thrust::get<6>(t) +
Chris@16:                     m_alpha7 * thrust::get<7>(t) ;
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16:     template< class Fac1 = double >
Chris@16:     struct rel_error
Chris@16:     {
Chris@16:         const Fac1 m_eps_abs , m_eps_rel , m_a_x , m_a_dxdt;
Chris@16: 
Chris@16:         rel_error( const Fac1 eps_abs , const Fac1 eps_rel , const Fac1 a_x , const Fac1 a_dxdt )
Chris@16:         : m_eps_abs( eps_abs ) , m_eps_rel( eps_rel ) , m_a_x( a_x ) , m_a_dxdt( a_dxdt ) { }
Chris@16: 
Chris@16: 
Chris@16:         template< class Tuple >
Chris@16:         __host__ __device__
Chris@16:         void operator()( Tuple t ) const
Chris@16:         {
Chris@16:             using std::abs;
Chris@16:             thrust::get< 0 >( t ) = abs( thrust::get< 0 >( t ) ) /
Chris@16:                     ( m_eps_abs + m_eps_rel * ( m_a_x * abs( thrust::get< 1 >( t ) + m_a_dxdt * abs( thrust::get< 2 >( t ) ) ) ) );
Chris@16:         }
Chris@16: 
Chris@16:         typedef void result_type;
Chris@16:     };
Chris@16: 
Chris@16: 
Chris@16: };
Chris@16: 
Chris@16: } // odeint
Chris@16: } // numeric
Chris@16: } // boost
Chris@16: 
Chris@16: 
Chris@16: #endif // BOOST_NUMERIC_ODEINT_EXTERNAL_THRUST_THRUST_OPERATIONS_HPP_INCLUDED