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213 lines
6.9 KiB
C++
213 lines
6.9 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/lattice/Lattice_peekpoke.h
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Copyright (C) 2015
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Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
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Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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Author: Peter Boyle <peterboyle@Peters-MacBook-Pro-2.local>
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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_PEEK_H
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#define GRID_LATTICE_PEEK_H
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///////////////////////////////////////////////
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// Peeking and poking around
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///////////////////////////////////////////////
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namespace Grid {
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Peek internal indices of a Lattice object
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<int Index,class vobj>
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auto PeekIndex(const Lattice<vobj> &lhs,int i) -> Lattice<decltype(peekIndex<Index>(lhs._odata[0],i))>
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{
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Lattice<decltype(peekIndex<Index>(lhs._odata[0],i))> ret(lhs._grid);
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ret.checkerboard=lhs.checkerboard;
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PARALLEL_FOR_LOOP
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for(int ss=0;ss<lhs._grid->oSites();ss++){
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ret._odata[ss] = peekIndex<Index>(lhs._odata[ss],i);
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}
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return ret;
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};
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template<int Index,class vobj>
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auto PeekIndex(const Lattice<vobj> &lhs,int i,int j) -> Lattice<decltype(peekIndex<Index>(lhs._odata[0],i,j))>
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{
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Lattice<decltype(peekIndex<Index>(lhs._odata[0],i,j))> ret(lhs._grid);
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ret.checkerboard=lhs.checkerboard;
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PARALLEL_FOR_LOOP
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for(int ss=0;ss<lhs._grid->oSites();ss++){
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ret._odata[ss] = peekIndex<Index>(lhs._odata[ss],i,j);
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}
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return ret;
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Poke internal indices of a Lattice object
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////////////////////////////////////////////////////////////////////////////////////////////////////
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template<int Index,class vobj>
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void PokeIndex(Lattice<vobj> &lhs,const Lattice<decltype(peekIndex<Index>(lhs._odata[0],0))> & rhs,int i)
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{
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PARALLEL_FOR_LOOP
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for(int ss=0;ss<lhs._grid->oSites();ss++){
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pokeIndex<Index>(lhs._odata[ss],rhs._odata[ss],i);
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}
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}
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template<int Index,class vobj>
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void PokeIndex(Lattice<vobj> &lhs,const Lattice<decltype(peekIndex<Index>(lhs._odata[0],0,0))> & rhs,int i,int j)
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{
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PARALLEL_FOR_LOOP
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for(int ss=0;ss<lhs._grid->oSites();ss++){
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pokeIndex<Index>(lhs._odata[ss],rhs._odata[ss],i,j);
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}
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}
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//////////////////////////////////////////////////////
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// Poke a scalar object into the SIMD array
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//////////////////////////////////////////////////////
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template<class vobj,class sobj>
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void pokeSite(const sobj &s,Lattice<vobj> &l,const std::vector<int> &site){
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GridBase *grid=l._grid;
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typedef typename vobj::scalar_type scalar_type;
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typedef typename vobj::vector_type vector_type;
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int Nsimd = grid->Nsimd();
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assert( l.checkerboard== l._grid->CheckerBoard(site));
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assert( sizeof(sobj)*Nsimd == sizeof(vobj));
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int rank,odx,idx;
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// Optional to broadcast from node 0.
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grid->GlobalCoorToRankIndex(rank,odx,idx,site);
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grid->Broadcast(grid->BossRank(),s);
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std::vector<sobj> buf(Nsimd);
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// extract-modify-merge cycle is easiest way and this is not perf critical
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if ( rank == grid->ThisRank() ) {
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extract(l._odata[odx],buf);
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buf[idx] = s;
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merge(l._odata[odx],buf);
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}
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return;
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};
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//////////////////////////////////////////////////////////
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// Peek a scalar object from the SIMD array
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//////////////////////////////////////////////////////////
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template<class vobj,class sobj>
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void peekSite(sobj &s,const Lattice<vobj> &l,const std::vector<int> &site){
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GridBase *grid=l._grid;
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typedef typename vobj::scalar_type scalar_type;
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typedef typename vobj::vector_type vector_type;
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int Nsimd = grid->Nsimd();
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assert( l.checkerboard == l._grid->CheckerBoard(site));
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// FIXME
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// assert( sizeof(sobj)*Nsimd == sizeof(vobj));
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int rank,odx,idx;
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grid->GlobalCoorToRankIndex(rank,odx,idx,site);
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std::vector<sobj> buf(Nsimd);
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extract(l._odata[odx],buf);
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s = buf[idx];
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grid->Broadcast(rank,s);
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return;
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};
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//////////////////////////////////////////////////////////
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// Peek a scalar object from the SIMD array
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//////////////////////////////////////////////////////////
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template<class vobj,class sobj>
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void peekLocalSite(sobj &s,const Lattice<vobj> &l,std::vector<int> &site){
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GridBase *grid = l._grid;
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typedef typename vobj::scalar_type scalar_type;
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typedef typename vobj::vector_type vector_type;
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int Nsimd = grid->Nsimd();
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assert( l.checkerboard== l._grid->CheckerBoard(site));
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assert( sizeof(sobj)*Nsimd == sizeof(vobj));
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static const int words=sizeof(vobj)/sizeof(vector_type);
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int odx,idx;
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idx= grid->iIndex(site);
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odx= grid->oIndex(site);
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scalar_type * vp = (scalar_type *)&l._odata[odx];
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scalar_type * pt = (scalar_type *)&s;
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for(int w=0;w<words;w++){
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pt[w] = vp[idx+w*Nsimd];
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}
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return;
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};
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template<class vobj,class sobj>
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void pokeLocalSite(const sobj &s,Lattice<vobj> &l,std::vector<int> &site){
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GridBase *grid=l._grid;
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typedef typename vobj::scalar_type scalar_type;
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typedef typename vobj::vector_type vector_type;
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int Nsimd = grid->Nsimd();
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assert( l.checkerboard== l._grid->CheckerBoard(site));
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assert( sizeof(sobj)*Nsimd == sizeof(vobj));
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static const int words=sizeof(vobj)/sizeof(vector_type);
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int odx,idx;
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idx= grid->iIndex(site);
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odx= grid->oIndex(site);
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scalar_type * vp = (scalar_type *)&l._odata[odx];
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scalar_type * pt = (scalar_type *)&s;
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for(int w=0;w<words;w++){
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vp[idx+w*Nsimd] = pt[w];
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}
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return;
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};
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}
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#endif
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