dirac_wilson.cpp

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#include <dirac_quda.h>
#include <blas_quda.h>
#include <iostream>
#include <multigrid.h>
 
namespace quda {
 
  DiracWilson::DiracWilson(const DiracParam &param) : Dirac(param) { }
 
  DiracWilson::DiracWilson(const DiracWilson &dirac) : Dirac(dirac) { }
 
  // hack (for DW and TM operators)
  DiracWilson::DiracWilson(const DiracParam &param, const int nDims) : Dirac(param) { } 
 
  DiracWilson::~DiracWilson() { }
 
  DiracWilson& DiracWilson::operator=(const DiracWilson &dirac)
  {
    if (&dirac != this) {
      Dirac::operator=(dirac);
    }
    return *this;
  }
 
  void DiracWilson::Dslash(ColorSpinorField &out, const ColorSpinorField &in, 
                           const QudaParity parity) const
  {
    checkParitySpinor(in, out);
    checkSpinorAlias(in, out);
 
    ApplyWilson(out, in, *gauge, 0.0, in, parity, dagger, commDim, profile);
    flops += 1320ll*in.Volume();
  }
 
  void DiracWilson::DslashXpay(ColorSpinorField &out, const ColorSpinorField &in, 
                               const QudaParity parity, const ColorSpinorField &x,
                               const double &k) const
  {
    checkParitySpinor(in, out);
    checkSpinorAlias(in, out);
 
    ApplyWilson(out, in, *gauge, k, x, parity, dagger, commDim, profile);
    flops += 1368ll*in.Volume();
  }
 
  void DiracWilson::M(ColorSpinorField &out, const ColorSpinorField &in) const
  {
    checkFullSpinor(out, in);
 
    ApplyWilson(out, in, *gauge, -kappa, in, QUDA_INVALID_PARITY, dagger, commDim, profile);
    flops += 1368ll * in.Volume();
  }
 
  void DiracWilson::MdagM(ColorSpinorField &out, const ColorSpinorField &in) const
  {
    checkFullSpinor(out, in);
 
    bool reset = newTmp(&tmp1, in);
    checkFullSpinor(*tmp1, in);
 
    M(*tmp1, in);
    Mdag(out, *tmp1);
 
    deleteTmp(&tmp1, reset);
  }
 
  void DiracWilson::prepare(ColorSpinorField* &src, ColorSpinorField* &sol,
                            ColorSpinorField &x, ColorSpinorField &b, 
                            const QudaSolutionType solType) const
  {
    if (solType == QUDA_MATPC_SOLUTION || solType == QUDA_MATPCDAG_MATPC_SOLUTION) {
      errorQuda("Preconditioned solution requires a preconditioned solve_type");
    }
 
    src = &b;
    sol = &x;
  }
 
  void DiracWilson::reconstruct(ColorSpinorField &x, const ColorSpinorField &b,
                                const QudaSolutionType solType) const
  {
    // do nothing
  }
 
  void DiracWilson::createCoarseOp(GaugeField &Y, GaugeField &X, const Transfer &T,
                                   double kappa, double mass, double mu, double mu_factor) const {
    if (T.getTransferType() != QUDA_TRANSFER_AGGREGATE)
      errorQuda("Wilson-type operators only support aggregation coarsening");
 
    double a = 2.0 * kappa * mu * T.Vectors().TwistFlavor();
    cudaCloverField *c = NULL;
    CoarseOp(Y, X, T, *gauge, c, kappa, mass, a, mu_factor, QUDA_WILSON_DIRAC, QUDA_MATPC_INVALID);
  }
 
  DiracWilsonPC::DiracWilsonPC(const DiracParam &param)
    : DiracWilson(param)
  {
 
  }
 
  DiracWilsonPC::DiracWilsonPC(const DiracWilsonPC &dirac) 
    : DiracWilson(dirac)
  {
 
  }
 
  DiracWilsonPC::~DiracWilsonPC()
  {
 
  }
 
  DiracWilsonPC& DiracWilsonPC::operator=(const DiracWilsonPC &dirac)
  {
    if (&dirac != this) {
      DiracWilson::operator=(dirac);
    }
    return *this;
  }
 
  void DiracWilsonPC::M(ColorSpinorField &out, const ColorSpinorField &in) const
  {
    double kappa2 = -kappa*kappa;
 
    bool reset = newTmp(&tmp1, in);
 
    if (matpcType == QUDA_MATPC_EVEN_EVEN) {
      Dslash(*tmp1, in, QUDA_ODD_PARITY);
      DslashXpay(out, *tmp1, QUDA_EVEN_PARITY, in, kappa2); 
    } else if (matpcType == QUDA_MATPC_ODD_ODD) {
      Dslash(*tmp1, in, QUDA_EVEN_PARITY);
      DslashXpay(out, *tmp1, QUDA_ODD_PARITY, in, kappa2); 
    } else {
      errorQuda("MatPCType %d not valid for DiracWilsonPC", matpcType);
    }
 
    deleteTmp(&tmp1, reset);
  }
 
  void DiracWilsonPC::MdagM(ColorSpinorField &out, const ColorSpinorField &in) const
  {
    bool reset = newTmp(&tmp2, in);
    M(*tmp2, in);
    Mdag(out, *tmp2);
    deleteTmp(&tmp2, reset);
  }
 
  void DiracWilsonPC::prepare(ColorSpinorField* &src, ColorSpinorField* &sol,
                              ColorSpinorField &x, ColorSpinorField &b, 
                              const QudaSolutionType solType) const
  {
    // we desire solution to preconditioned system
    if (solType == QUDA_MATPC_SOLUTION || solType == QUDA_MATPCDAG_MATPC_SOLUTION) {
      src = &b;
      sol = &x;
    } else {
      // we desire solution to full system
      if (matpcType == QUDA_MATPC_EVEN_EVEN) {
        // src = b_e + k D_eo b_o
        DslashXpay(x.Odd(), b.Odd(), QUDA_EVEN_PARITY, b.Even(), kappa);
        src = &(x.Odd());
        sol = &(x.Even());
      } else if (matpcType == QUDA_MATPC_ODD_ODD) {
        // src = b_o + k D_oe b_e
        DslashXpay(x.Even(), b.Even(), QUDA_ODD_PARITY, b.Odd(), kappa);
        src = &(x.Even());
        sol = &(x.Odd());
      } else {
        errorQuda("MatPCType %d not valid for DiracWilsonPC", matpcType);
      }
      // here we use final solution to store parity solution and parity source
      // b is now up for grabs if we want
    }
 
  }
 
  void DiracWilsonPC::reconstruct(ColorSpinorField &x, const ColorSpinorField &b,
                                  const QudaSolutionType solType) const
  {
    if (solType == QUDA_MATPC_SOLUTION || solType == QUDA_MATPCDAG_MATPC_SOLUTION) {
      return;
    }                           
 
    // create full solution
 
    checkFullSpinor(x, b);
    if (matpcType == QUDA_MATPC_EVEN_EVEN) {
      // x_o = b_o + k D_oe x_e
      DslashXpay(x.Odd(), x.Even(), QUDA_ODD_PARITY, b.Odd(), kappa);
    } else if (matpcType == QUDA_MATPC_ODD_ODD) {
      // x_e = b_e + k D_eo x_o
      DslashXpay(x.Even(), x.Odd(), QUDA_EVEN_PARITY, b.Even(), kappa);
    } else {
      errorQuda("MatPCType %d not valid for DiracWilsonPC", matpcType);
    }
  }
 
} // namespace quda