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135 lines
3.9 KiB
C++
135 lines
3.9 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: Hadrons/Modules/MScalarSUN/Utils.hpp
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Copyright (C) 2015-2018
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Author: Antonin Portelli <antonin.portelli@me.com>
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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 Hadrons_MScalarSUN_Utils_hpp_
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#define Hadrons_MScalarSUN_Utils_hpp_
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#include <Hadrons/Global.hpp>
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#include <Hadrons/Module.hpp>
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BEGIN_HADRONS_NAMESPACE
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BEGIN_MODULE_NAMESPACE(MScalarSUN)
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GRID_SERIALIZABLE_ENUM(DiffType, undef, forward, 1, backward, 2, central, 3);
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template <typename Field>
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inline void dmu(Field &out, const Field &in, const unsigned int mu, const DiffType type)
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{
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auto & env = Environment::getInstance();
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if (mu >= env.getNd())
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{
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HADRONS_ERROR(Range, "Derivative direction out of range");
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}
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switch(type)
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{
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case DiffType::backward:
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out = in - Cshift(in, mu, -1);
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break;
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case DiffType::forward:
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out = Cshift(in, mu, 1) - in;
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break;
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case DiffType::central:
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out = 0.5*(Cshift(in, mu, 1) - Cshift(in, mu, -1));
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break;
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default:
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HADRONS_ERROR(Argument, "Derivative type invalid");
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break;
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}
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}
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template <typename Field>
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inline void dmuAcc(Field &out, const Field &in, const unsigned int mu, const DiffType type)
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{
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auto & env = Environment::getInstance();
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if (mu >= env.getNd())
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{
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HADRONS_ERROR(Range, "Derivative direction out of range");
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}
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switch(type)
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{
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case DiffType::backward:
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out += in - Cshift(in, mu, -1);
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break;
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case DiffType::forward:
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out += Cshift(in, mu, 1) - in;
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break;
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case DiffType::central:
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out += 0.5*(Cshift(in, mu, 1) - Cshift(in, mu, -1));
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break;
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default:
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HADRONS_ERROR(Argument, "Derivative type invalid");
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break;
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}
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}
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template <class SinkSite, class SourceSite>
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std::vector<Complex> makeTwoPoint(const std::vector<SinkSite> &sink,
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const std::vector<SourceSite> &source,
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const double factor = 1.)
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{
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assert(sink.size() == source.size());
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unsigned int nt = sink.size();
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std::vector<Complex> res(nt, 0.);
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for (unsigned int dt = 0; dt < nt; ++dt)
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{
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for (unsigned int t = 0; t < nt; ++t)
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{
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res[dt] += trace(sink[(t+dt)%nt]*source[t]);
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}
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res[dt] *= factor/static_cast<double>(nt);
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}
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return res;
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}
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inline std::string varName(const std::string name, const std::string suf)
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{
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return name + "_" + suf;
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}
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inline std::string varName(const std::string name, const unsigned int mu)
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{
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return varName(name, std::to_string(mu));
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}
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inline std::string varName(const std::string name, const unsigned int mu,
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const unsigned int nu)
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{
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return varName(name, std::to_string(mu) + "_" + std::to_string(nu));
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}
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END_MODULE_NAMESPACE
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END_HADRONS_NAMESPACE
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#endif // Hadrons_MScalarSUN_Utils_hpp_
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