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git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@6262 f3b2605a-c512-4ea7-a41b-209d697bcdaa

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sjplimp
2011-05-31 21:09:51 +00:00
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lib/cuda/fft3d_cuda.cu Normal file
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/* ----------------------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
Original Version:
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
See the README file in the top-level LAMMPS directory.
-----------------------------------------------------------------------
USER-CUDA Package and associated modifications:
https://sourceforge.net/projects/lammpscuda/
Christian Trott, christian.trott@tu-ilmenau.de
Lars Winterfeld, lars.winterfeld@tu-ilmenau.de
Theoretical Physics II, University of Technology Ilmenau, Germany
See the README file in the USER-CUDA directory.
This software is distributed under the GNU General Public License.
------------------------------------------------------------------------- */
//#define CUDA_PRECISION 1
#include "cuda_precision.h"
#include "cuda_common.h"
struct FFT_DATA{
FFT_FLOAT re;
FFT_FLOAT im;
};
#include "fft3d_cuda_cu.h"
#include "fft3d_cuda_kernel.cu"
#include <stdio.h>
void initfftdata(double* in,FFT_FLOAT* out,int nfast,int nmid,int nslow)
{
dim3 grid;
grid.x=nslow;
grid.y=nmid;
grid.z=1;
dim3 threads;
threads.x=nfast;
threads.y=1;
threads.z=1;
cudaThreadSynchronize();
initfftdata_kernel<<<grid,threads,0>>>(in,out);
cudaThreadSynchronize();
MYDBG(printf("ERROR-CUDA initfftdata_kernel: %s\n",cudaGetErrorString(cudaGetLastError())));
}
void permute(FFT_DATA* in,FFT_DATA* out,int nfast,int nmid,int nslow)
{
dim3 grid;
grid.x=nslow;
grid.y=nmid;
grid.z=1;
dim3 threads;
threads.x=nfast*2;
threads.y=1;
threads.z=1;
permute_kernel<<<grid,threads,0>>>((FFT_FLOAT*)in,(FFT_FLOAT*)out);
cudaThreadSynchronize();
MYDBG(printf("ERROR-CUDA permute_kernel: %s\n",cudaGetErrorString(cudaGetLastError())));
}
void permute_scale(FFT_DATA* in,FFT_DATA* out,int nfast,int nmid,int nslow)
{
dim3 grid;
grid.x=nslow;
grid.y=nmid;
grid.z=1;
dim3 threads;
threads.x=nfast*2;
threads.y=1;
threads.z=1;
permute_kernel<<<grid,threads,0>>>((FFT_FLOAT*)in,(FFT_FLOAT*)out);
cudaThreadSynchronize();
}
void permute_part(FFT_DATA* in,FFT_DATA* out,int nfast,int nmid,int nslow,int ihi,int ilo,int jhi,int jlo,int khi,int klo)
{
dim3 grid;
grid.x=(ihi-ilo+1);
grid.y=(jhi-jlo+1);
grid.z=1;
dim3 threads;
threads.x=(khi-klo+1)*2;
threads.y=1;
threads.z=1;
permute_part_kernel<<<grid,threads,0>>>((FFT_FLOAT*)in,(FFT_FLOAT*)out,nfast,nmid,nslow,ihi,ilo,jhi,jlo,khi,klo);
cudaThreadSynchronize();
}
void FFTsyncthreads()
{
cudaThreadSynchronize();
}