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368 lines
10 KiB
C++
368 lines
10 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/lattice/Lattice_transfer.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_LATTICE_TRANSFER_H
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#define GRID_LATTICE_TRANSFER_H
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namespace Grid {
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inline void subdivides(GridBase *coarse,GridBase *fine)
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{
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assert(coarse->_ndimension == fine->_ndimension);
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int _ndimension = coarse->_ndimension;
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// local and global volumes subdivide cleanly after SIMDization
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for(int d=0;d<_ndimension;d++){
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assert(coarse->_processors[d] == fine->_processors[d]);
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assert(coarse->_simd_layout[d] == fine->_simd_layout[d]);
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assert((fine->_rdimensions[d] / coarse->_rdimensions[d])* coarse->_rdimensions[d]==fine->_rdimensions[d]);
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}
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}
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////////////////////////////////////////////////////////////////////////////////////////////
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// remove and insert a half checkerboard
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////////////////////////////////////////////////////////////////////////////////////////////
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template<class vobj> inline void pickCheckerboard(int cb,Lattice<vobj> &half,const Lattice<vobj> &full){
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half.checkerboard = cb;
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int ssh=0;
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//PARALLEL_FOR_LOOP
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for(int ss=0;ss<full._grid->oSites();ss++){
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std::vector<int> coor;
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int cbos;
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full._grid->oCoorFromOindex(coor,ss);
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cbos=half._grid->CheckerBoard(coor);
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if (cbos==cb) {
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half._odata[ssh] = full._odata[ss];
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ssh++;
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}
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}
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}
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template<class vobj> inline void setCheckerboard(Lattice<vobj> &full,const Lattice<vobj> &half){
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int cb = half.checkerboard;
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int ssh=0;
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//PARALLEL_FOR_LOOP
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for(int ss=0;ss<full._grid->oSites();ss++){
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std::vector<int> coor;
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int cbos;
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full._grid->oCoorFromOindex(coor,ss);
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cbos=half._grid->CheckerBoard(coor);
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if (cbos==cb) {
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full._odata[ss]=half._odata[ssh];
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ssh++;
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}
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}
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}
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template<class vobj,class CComplex,int nbasis>
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inline void blockProject(Lattice<iVector<CComplex,nbasis > > &coarseData,
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const Lattice<vobj> &fineData,
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const std::vector<Lattice<vobj> > &Basis)
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{
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GridBase * fine = fineData._grid;
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GridBase * coarse= coarseData._grid;
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int _ndimension = coarse->_ndimension;
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// checks
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assert( nbasis == Basis.size() );
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subdivides(coarse,fine);
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for(int i=0;i<nbasis;i++){
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conformable(Basis[i],fineData);
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}
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std::vector<int> block_r (_ndimension);
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for(int d=0 ; d<_ndimension;d++){
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block_r[d] = fine->_rdimensions[d] / coarse->_rdimensions[d];
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assert(block_r[d]*coarse->_rdimensions[d] == fine->_rdimensions[d]);
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}
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coarseData=zero;
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// Loop with a cache friendly loop ordering
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for(int sf=0;sf<fine->oSites();sf++){
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int sc;
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std::vector<int> coor_c(_ndimension);
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std::vector<int> coor_f(_ndimension);
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Lexicographic::CoorFromIndex(coor_f,sf,fine->_rdimensions);
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for(int d=0;d<_ndimension;d++) coor_c[d]=coor_f[d]/block_r[d];
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Lexicographic::IndexFromCoor(coor_c,sc,coarse->_rdimensions);
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for(int i=0;i<nbasis;i++) {
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coarseData._odata[sc](i)=coarseData._odata[sc](i)
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+ innerProduct(Basis[i]._odata[sf],fineData._odata[sf]);
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}
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}
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return;
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}
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template<class vobj,class CComplex>
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inline void blockZAXPY(Lattice<vobj> &fineZ,
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const Lattice<CComplex> &coarseA,
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const Lattice<vobj> &fineX,
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const Lattice<vobj> &fineY)
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{
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GridBase * fine = fineZ._grid;
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GridBase * coarse= coarseA._grid;
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fineZ.checkerboard=fineX.checkerboard;
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subdivides(coarse,fine); // require they map
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conformable(fineX,fineY);
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conformable(fineX,fineZ);
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int _ndimension = coarse->_ndimension;
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std::vector<int> block_r (_ndimension);
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// FIXME merge with subdivide checking routine as this is redundant
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for(int d=0 ; d<_ndimension;d++){
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block_r[d] = fine->_rdimensions[d] / coarse->_rdimensions[d];
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assert(block_r[d]*coarse->_rdimensions[d]==fine->_rdimensions[d]);
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}
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PARALLEL_FOR_LOOP
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for(int sf=0;sf<fine->oSites();sf++){
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int sc;
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std::vector<int> coor_c(_ndimension);
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std::vector<int> coor_f(_ndimension);
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Lexicographic::CoorFromIndex(coor_f,sf,fine->_rdimensions);
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for(int d=0;d<_ndimension;d++) coor_c[d]=coor_f[d]/block_r[d];
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Lexicographic::IndexFromCoor(coor_c,sc,coarse->_rdimensions);
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// z = A x + y
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fineZ._odata[sf]=coarseA._odata[sc]*fineX._odata[sf]+fineY._odata[sf];
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}
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return;
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}
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template<class vobj,class CComplex>
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inline void blockInnerProduct(Lattice<CComplex> &CoarseInner,
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const Lattice<vobj> &fineX,
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const Lattice<vobj> &fineY)
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{
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typedef decltype(innerProduct(fineX._odata[0],fineY._odata[0])) dotp;
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GridBase *coarse(CoarseInner._grid);
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GridBase *fine (fineX._grid);
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Lattice<dotp> fine_inner(fine);
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Lattice<dotp> coarse_inner(coarse);
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fine_inner = localInnerProduct(fineX,fineY);
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blockSum(coarse_inner,fine_inner);
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PARALLEL_FOR_LOOP
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for(int ss=0;ss<coarse->oSites();ss++){
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CoarseInner._odata[ss] = coarse_inner._odata[ss];
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}
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}
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template<class vobj,class CComplex>
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inline void blockNormalise(Lattice<CComplex> &ip,Lattice<vobj> &fineX)
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{
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GridBase *coarse = ip._grid;
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Lattice<vobj> zz(fineX._grid); zz=zero;
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blockInnerProduct(ip,fineX,fineX);
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ip = pow(ip,-0.5);
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blockZAXPY(fineX,ip,fineX,zz);
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}
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// useful in multigrid project;
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// Generic name : Coarsen?
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template<class vobj>
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inline void blockSum(Lattice<vobj> &coarseData,const Lattice<vobj> &fineData)
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{
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GridBase * fine = fineData._grid;
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GridBase * coarse= coarseData._grid;
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subdivides(coarse,fine); // require they map
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int _ndimension = coarse->_ndimension;
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std::vector<int> block_r (_ndimension);
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for(int d=0 ; d<_ndimension;d++){
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block_r[d] = fine->_rdimensions[d] / coarse->_rdimensions[d];
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}
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coarseData=zero;
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for(int sf=0;sf<fine->oSites();sf++){
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int sc;
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std::vector<int> coor_c(_ndimension);
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std::vector<int> coor_f(_ndimension);
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Lexicographic::CoorFromIndex(coor_f,sf,fine->_rdimensions);
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for(int d=0;d<_ndimension;d++) coor_c[d]=coor_f[d]/block_r[d];
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Lexicographic::IndexFromCoor(coor_c,sc,coarse->_rdimensions);
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coarseData._odata[sc]=coarseData._odata[sc]+fineData._odata[sf];
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}
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return;
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}
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template<class vobj>
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inline void blockPick(GridBase *coarse,const Lattice<vobj> &unpicked,Lattice<vobj> &picked,std::vector<int> coor)
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{
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GridBase * fine = unpicked._grid;
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Lattice<vobj> zz(fine);
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Lattice<iScalar<vInteger> > fcoor(fine);
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zz = zero;
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picked = unpicked;
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for(int d=0;d<fine->_ndimension;d++){
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LatticeCoordinate(fcoor,d);
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int block= fine->_rdimensions[d] / coarse->_rdimensions[d];
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int lo = (coor[d])*block;
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int hi = (coor[d]+1)*block;
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picked = where( (fcoor<hi) , picked, zz);
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picked = where( (fcoor>=lo), picked, zz);
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}
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}
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template<class vobj,class CComplex>
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inline void blockOrthogonalise(Lattice<CComplex> &ip,std::vector<Lattice<vobj> > &Basis)
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{
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GridBase *coarse = ip._grid;
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GridBase *fine = Basis[0]._grid;
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int nbasis = Basis.size() ;
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int _ndimension = coarse->_ndimension;
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// checks
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subdivides(coarse,fine);
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for(int i=0;i<nbasis;i++){
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conformable(Basis[i]._grid,fine);
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}
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for(int v=0;v<nbasis;v++) {
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for(int u=0;u<v;u++) {
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//Inner product & remove component
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blockInnerProduct(ip,Basis[u],Basis[v]);
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ip = -ip;
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blockZAXPY<vobj,CComplex> (Basis[v],ip,Basis[u],Basis[v]);
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}
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blockNormalise(ip,Basis[v]);
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}
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}
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template<class vobj,class CComplex,int nbasis>
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inline void blockPromote(const Lattice<iVector<CComplex,nbasis > > &coarseData,
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Lattice<vobj> &fineData,
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const std::vector<Lattice<vobj> > &Basis)
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{
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GridBase * fine = fineData._grid;
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GridBase * coarse= coarseData._grid;
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int _ndimension = coarse->_ndimension;
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// checks
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assert( nbasis == Basis.size() );
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subdivides(coarse,fine);
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for(int i=0;i<nbasis;i++){
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conformable(Basis[i]._grid,fine);
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}
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std::vector<int> block_r (_ndimension);
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for(int d=0 ; d<_ndimension;d++){
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block_r[d] = fine->_rdimensions[d] / coarse->_rdimensions[d];
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}
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// Loop with a cache friendly loop ordering
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for(int sf=0;sf<fine->oSites();sf++){
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int sc;
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std::vector<int> coor_c(_ndimension);
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std::vector<int> coor_f(_ndimension);
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Lexicographic::CoorFromIndex(coor_f,sf,fine->_rdimensions);
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for(int d=0;d<_ndimension;d++) coor_c[d]=coor_f[d]/block_r[d];
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Lexicographic::IndexFromCoor(coor_c,sc,coarse->_rdimensions);
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for(int i=0;i<nbasis;i++) {
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if(i==0) fineData._odata[sf]=coarseData._odata[sc](i) * Basis[i]._odata[sf];
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else fineData._odata[sf]=fineData._odata[sf]+coarseData._odata[sc](i)*Basis[i]._odata[sf];
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}
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}
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return;
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}
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template<class vobj>
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void Replicate(Lattice<vobj> &coarse,Lattice<vobj> & fine)
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{
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typedef typename vobj::scalar_object sobj;
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GridBase *cg = coarse._grid;
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GridBase *fg = fine._grid;
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int nd = cg->_ndimension;
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subdivides(cg,fg);
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assert(cg->_ndimension==fg->_ndimension);
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std::vector<int> ratio(cg->_ndimension);
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for(int d=0;d<cg->_ndimension;d++){
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ratio[d] = fg->_fdimensions[d]/cg->_fdimensions[d];
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}
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std::vector<int> fcoor(nd);
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std::vector<int> ccoor(nd);
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for(int g=0;g<fg->gSites();g++){
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fg->GlobalIndexToGlobalCoor(g,fcoor);
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for(int d=0;d<nd;d++){
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ccoor[d] = fcoor[d]%cg->_gdimensions[d];
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}
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sobj tmp;
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peekSite(tmp,coarse,ccoor);
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pokeSite(tmp,fine,fcoor);
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}
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}
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}
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#endif
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