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grid_amplif_CPU.cpp
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Thu, Dec 5, 04:26

grid_amplif_CPU.cpp
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/**
Lenstool-HPC: HPC based massmodeling software and Lens-map generation
Copyright (C) 2017 Christoph Schaefer, EPFL (christophernstrerne.schaefer@epfl.ch), Gilles Fourestey (gilles.fourestey@epfl.ch)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
@brief: Function for testing amplification computation over a grid on CPU to compare with GPUs
*/
#include "grid_amplif_CPU.hpp"
#include "module_cosmodistances.hpp"
//
#ifdef __WITH_MPI
#include<mpi.h>
#endif
//
//This natrix handles the calling of the amplif functions for the different types without losing time to switch or if condition
//
typedef void (*amplif_func_t)(type_t *ampli, const struct cosmo_param *cosmo, const struct grid_param *frame, const struct Potential_SOA *lens, int Nlens, type_t dx, type_t dy, int nbgridcells_x, int nbgridcells_y,type_t z, int istart, int jstart);
amplif_func_t amplif_func[10] =
{
0, 0, 0, 0, 0,
amplif_5_grid_general_CPU, 0, 0, 0, 0,
};
//
void amplif_grid_CPU(type_t *amplif, const struct cosmo_param *cosmo, const struct grid_param *frame, const struct Potential_SOA *lens, int nhalos, int nbgridcells,int mode_amp,type_t z, int istart, int jstart)
{
type_t dx = (frame->xmax - frame->xmin)/(nbgridcells - 1);
type_t dy = (frame->ymax - frame->ymin)/(nbgridcells - 1);
//
(*amplif_func[mode_amp])(amplif, cosmo, frame, lens, nhalos, dx, dy, nbgridcells, nbgridcells,z, istart, jstart);
}
//
//table for ampli methods
//
void amplif_5_grid_general_CPU(type_t *ampli, const struct cosmo_param *cosmo, const struct grid_param *frame, const struct Potential_SOA *lens, int Nlens, type_t dx, type_t dy, int nbgridcells_x, int nbgridcells_y, type_t z, int istart, int jstart)
{
int bid = 0; // index of the block (and of the set of images)
int tid = 0; // index of the thread within the block
//
type_t /*dx, dy,*/ x_pos, y_pos, kappa; //pixelsize
int grid_dim;
point image_point;
matrix Grad2;
type_t dl0s = module_cosmodistances_objectObject(lens->z[0], z, *cosmo);
//std::cerr << lens->z[0] <<" " << z << " "<< dl0s << std::endl;
//
grid_dim = nbgridcells_x*nbgridcells_y;
//@@printf("-> dx = %f, dy = %f, istart = %d, jstart = %d, nbgridcells_x = %d, nbgridcells_y = %d\n", dx, dy, istart, jstart, nbgridcells_x, nbgridcells_y);
//
#pragma omp parallel
#pragma omp for private(Grad2, image_point, kappa)
for (int jj = 0; jj < nbgridcells_y; ++jj)
for (int ii = 0; ii < nbgridcells_x; ++ii)
{
int index = jj*nbgridcells_x + ii;
image_point.x = frame->xmin + (ii + istart)*dx;
image_point.y = frame->ymin + (jj + jstart)*dy;
//
Grad2 = module_potentialDerivatives_totalGradient2_SOA(&image_point, lens, Nlens);
//
//Grad2.a /= dl0s;
//Grad2.b /= dl0s;
//Grad2.c /= dl0s;
//
kappa = (Grad2.a + Grad2.c) / 2.;
ampli[index] = kappa;
//
}
}

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