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128 lines
4.0 KiB
C++
128 lines
4.0 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/cartesian/Cartesian_full.h
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Copyright (C) 2015
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Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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#ifndef GRID_CARTESIAN_FULL_H
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#define GRID_CARTESIAN_FULL_H
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namespace Grid{
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/////////////////////////////////////////////////////////////////////////////////////////
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// Grid Support.
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/////////////////////////////////////////////////////////////////////////////////////////
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class GridCartesian: public GridBase {
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public:
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virtual int CheckerBoarded(int dim){
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return 0;
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}
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virtual int CheckerBoard(std::vector<int> site){
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return 0;
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}
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virtual int CheckerBoardDestination(int cb,int shift,int dim){
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return 0;
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}
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virtual int CheckerBoardShiftForCB(int source_cb,int dim,int shift, int ocb){
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return shift;
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}
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virtual int CheckerBoardShift(int source_cb,int dim,int shift, int osite){
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return shift;
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}
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GridCartesian(const std::vector<int> &dimensions,
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const std::vector<int> &simd_layout,
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const std::vector<int> &processor_grid
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) : GridBase(processor_grid)
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{
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///////////////////////
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// Grid information
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///////////////////////
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_ndimension = dimensions.size();
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_fdimensions.resize(_ndimension);
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_gdimensions.resize(_ndimension);
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_ldimensions.resize(_ndimension);
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_rdimensions.resize(_ndimension);
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_simd_layout.resize(_ndimension);
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_ostride.resize(_ndimension);
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_istride.resize(_ndimension);
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_fsites = _gsites = _osites = _isites = 1;
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for(int d=0;d<_ndimension;d++){
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_fdimensions[d] = dimensions[d]; // Global dimensions
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_gdimensions[d] = _fdimensions[d]; // Global dimensions
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_simd_layout[d] = simd_layout[d];
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_fsites = _fsites * _fdimensions[d];
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_gsites = _gsites * _gdimensions[d];
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//FIXME check for exact division
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// Use a reduced simd grid
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_ldimensions[d]= _gdimensions[d]/_processors[d]; //local dimensions
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_rdimensions[d]= _ldimensions[d]/_simd_layout[d]; //overdecomposition
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_osites *= _rdimensions[d];
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_isites *= _simd_layout[d];
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// Addressing support
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if ( d==0 ) {
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_ostride[d] = 1;
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_istride[d] = 1;
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} else {
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_ostride[d] = _ostride[d-1]*_rdimensions[d-1];
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_istride[d] = _istride[d-1]*_simd_layout[d-1];
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}
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}
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///////////////////////
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// subplane information
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///////////////////////
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_slice_block.resize(_ndimension);
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_slice_stride.resize(_ndimension);
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_slice_nblock.resize(_ndimension);
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int block =1;
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int nblock=1;
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for(int d=0;d<_ndimension;d++) nblock*=_rdimensions[d];
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for(int d=0;d<_ndimension;d++){
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nblock/=_rdimensions[d];
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_slice_block[d] =block;
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_slice_stride[d]=_ostride[d]*_rdimensions[d];
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_slice_nblock[d]=nblock;
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block = block*_rdimensions[d];
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}
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};
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};
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}
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#endif
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