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pair_gpu_nbor_kernel.cu
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Sun, Jun 30, 06:16

pair_gpu_nbor_kernel.cu

/* ----------------------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
Copyright (2003) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the GNU General Public License.
See the README file in the top-level LAMMPS directory.
------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------
Contributing authors: Mike Brown (ORNL), brownw@ornl.gov
------------------------------------------------------------------------- */
#ifdef NV_KERNEL
#include "geryon/ucl_nv_kernel.h"
#else
#define GLOBAL_ID_X get_global_id(0)
#endif
__kernel void kernel_unpack(__global int *dev_nbor, __global int *dev_ij,
const int inum) {
// ii indexes the two interacting particles in gi
int ii=GLOBAL_ID_X;
if (ii<inum) {
__global int *nbor=dev_nbor+ii+inum;
int numj=*nbor;
nbor+=inum;
__global int *list=dev_ij+*nbor;
__global int *list_end=list+numj;
for ( ; list<list_end; list++) {
*nbor=*list;
nbor+=inum;
}
} // if ii
}

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