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Hadrons: Scalar SU(N) utility functions

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This commit is contained in:
Antonin Portelli
2018-03-02 17:34:23 +00:00
parent 550142bd6a
commit 614a0e8277
8 changed files with 97 additions and 62 deletions
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80
extras/Hadrons/Modules/MScalarSUN/Utils.hpp Normal file
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#ifndef Hadrons_MScalarSUN_Utils_hpp_
#define Hadrons_MScalarSUN_Utils_hpp_
#include <Grid/Hadrons/Global.hpp>
#include <Grid/Hadrons/Module.hpp>
BEGIN_HADRONS_NAMESPACE
BEGIN_MODULE_NAMESPACE(MScalarSUN)
GRID_SERIALIZABLE_ENUM(DiffType, undef, forward, 1, backward, 2, central, 3);
template <typename Field>
inline void dmu(Field &out, const Field &in, const unsigned int mu, const DiffType type)
{
auto & env = Environment::getInstance();
if (mu >= env.getNd())
{
HADRON_ERROR(Range, "Derivative direction out of range");
}
switch(type)
{
case DiffType::backward:
out = in - Cshift(in, mu, -1);
break;
case DiffType::forward:
out = Cshift(in, mu, 1) - in;
break;
case DiffType::central:
out = 0.5*(Cshift(in, mu, 1) - Cshift(in, mu, -1));
break;
default:
HADRON_ERROR(Argument, "Derivative type invalid");
break;
}
}
template <typename Field>
inline void dmuAcc(Field &out, const Field &in, const unsigned int mu, const DiffType type)
{
auto & env = Environment::getInstance();
if (mu >= env.getNd())
{
HADRON_ERROR(Range, "Derivative direction out of range");
}
switch(type)
{
case DiffType::backward:
out += in - Cshift(in, mu, -1);
break;
case DiffType::forward:
out += Cshift(in, mu, 1) - in;
break;
case DiffType::central:
out += 0.5*(Cshift(in, mu, 1) - Cshift(in, mu, -1));
break;
default:
HADRON_ERROR(Argument, "Derivative type invalid");
break;
}
}
inline std::string varName(const std::string name, const unsigned int mu)
{
return name + "_" + std::to_string(mu);
}
inline std::string varName(const std::string name, const unsigned int mu,
const unsigned int nu)
{
return name + "_" + std::to_string(mu) + "_" + std::to_string(nu);
}
END_MODULE_NAMESPACE
END_HADRONS_NAMESPACE
#endif // Hadrons_MScalarSUN_Utils_hpp_