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lammps/lib/gpu/lal_lj_cubic.h
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lal_lj_cubic.h
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/***************************************************************************
lj_cubic.h
-------------------
Trung Dac Nguyen
Class for acceleration of the lj/cubic pair style.
__________________________________________________________________________
This file is part of the LAMMPS Accelerator Library (LAMMPS_AL)
__________________________________________________________________________
begin :
email : ndactrung@gmail.com
***************************************************************************/
#ifndef LAL_LJ_H
#define LAL_LJ_H
#include "lal_base_atomic.h"
namespace LAMMPS_AL {
template <class numtyp, class acctyp>
class LJCubic : public BaseAtomic<numtyp, acctyp> {
public:
LJCubic();
~LJCubic();
/// Clear any previous data and set up for a new LAMMPS run
/** \param max_nbors initial number of rows in the neighbor matrix
* \param cell_size cutoff + skin
* \param gpu_split fraction of particles handled by device
*
* Returns:
* - 0 if successfull
* - -1 if fix gpu not found
* - -3 if there is an out of memory error
* - -4 if the GPU library was not compiled for GPU
* - -5 Double precision is not supported on card **/
int init(const int ntypes, double **host_cutsq, double **host_cut_inner_sq,
double **host_cut_inner, double **host_sigma, double **host_epsilon,
double **host_lj1, double **host_lj2, double **host_lj3,
double **host_lj4, double *host_special_lj, const int nlocal,
const int nall, const int max_nbors, const int maxspecial,
const double cell_size, const double gpu_split, FILE *screen);
/// Clear all host and device data
/** \note This is called at the beginning of the init() routine **/
void clear();
/// Returns memory usage on device per atom
int bytes_per_atom(const int max_nbors) const;
/// Total host memory used by library for pair style
double host_memory_usage() const;
// --------------------------- TYPE DATA --------------------------
/// lj1.x = lj1, lj1.y = lj2, lj1.z = cutsq
UCL_D_Vec<numtyp4> lj1;
/// lj2.x = cut_inner_sq, lj2.y = cut_inner, lj2.z = sigma, lj2.w = epsilon
UCL_D_Vec<numtyp4> lj2;
/// lj3.x = lj3, lj3.y = lj4
UCL_D_Vec<numtyp2> lj3;
/// Special LJ values
UCL_D_Vec<numtyp> sp_lj;
/// If atom type constants fit in shared memory, use fast kernels
bool shared_types;
/// Number of atom types
int _lj_types;
private:
bool _allocated;
void loop(const bool _eflag, const bool _vflag);
};
}
#endif
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