cub_interp.hpp

Go to the documentation of this file.

#ifndef CUB_INTERP_HPP
#define CUB_INTERP_HPP
#include "space_settings.hpp"
#include "my_mirror_view.hpp"
 
// An array of this struct contains the background magnetic field used for interpolation. Size 4 since it is 3rd-order spline
struct OneDCoeff {
    double coeff[4];
};
 
template<class Device>
class CubInterp {
    // This line enables private access between the host and device implementations of this class
    // i.e. Makes the copy from host to device more straightforward
    template<class Device2> friend class CubInterp;
 
    // Variables needed in the interp
    int ncoeff;    
    double max_x;  
    double min_x;  
    double dx_inv; 
 
    Kokkos::View<OneDCoeff*,Kokkos::LayoutRight,Device> acoef; 
 
    public:
 
    // Constructor from x and y
    CubInterp(const View<double*, HostType>& x, const View<double*, HostType>& y);
 
    // Create a mirror with a different device type
    template<class Device2>
    inline CubInterp<Device2> mirror() const{
        CubInterp<Device2> m;
        m.max_x = max_x;
        m.min_x = min_x;
        m.dx_inv = dx_inv;
        m.ncoeff = ncoeff;
        m.acoef = my_mirror_view(acoef, Device2());
        mirror_copy(m.acoef, acoef);
 
        return m;
    }
 
    // Default constructor
    CubInterp(){}
 
    KOKKOS_INLINE_FUNCTION double value(double x) const;
    KOKKOS_INLINE_FUNCTION double derivative(double x) const;
};
 
#include "cub_interp.tpp"
 
#endif