dslash_wilson_clover_preconditioned.cu

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#include <gauge_field.h>
#include <color_spinor_field.h>
#include <clover_field.h>
#include <dslash.h>
#include <worker.h>
 
#include <dslash_policy.cuh>
#include <kernels/dslash_wilson_clover_preconditioned.cuh>
 
/**
   This is the Wilson-clover preconditioned linear operator
*/
 
namespace quda
{
 
  template <typename Arg> class WilsonCloverPreconditioned : public Dslash<wilsonCloverPreconditioned, Arg>
  {
    using Dslash = Dslash<wilsonCloverPreconditioned, Arg>;
    using Dslash::arg;
    using Dslash::in;
 
  public:
    WilsonCloverPreconditioned(Arg &arg, const ColorSpinorField &out, const ColorSpinorField &in) : Dslash(arg, out, in)
    {
    }
 
    void apply(const qudaStream_t &stream)
    {
      TuneParam tp = tuneLaunch(*this, getTuning(), getVerbosity());
      Dslash::setParam(tp);
      // specialize here to constrain the template instantiation
      if (arg.nParity == 1) {
        if (arg.xpay) {
          if (arg.dagger) errorQuda("xpay operator only defined for not dagger");
          Dslash::template instantiate<packShmem, 1, false, true>(tp, stream);
        } else {
          if (arg.dagger)
            Dslash::template instantiate<packShmem, 1, true, false>(tp, stream);
          else
            Dslash::template instantiate<packShmem, 1, false, false>(tp, stream);
        }
      } else {
        errorQuda("Preconditioned Wilson-clover operator not defined nParity=%d", arg.nParity);
      }
    }
 
    long long flops() const
    {
      int clover_flops = 504;
      long long flops = Dslash::flops();
      switch (arg.kernel_type) {
      case EXTERIOR_KERNEL_X:
      case EXTERIOR_KERNEL_Y:
      case EXTERIOR_KERNEL_Z:
      case EXTERIOR_KERNEL_T: flops += clover_flops * 2 * in.GhostFace()[arg.kernel_type]; break;
      case EXTERIOR_KERNEL_ALL:
        flops += clover_flops * 2 * (in.GhostFace()[0] + in.GhostFace()[1] + in.GhostFace()[2] + in.GhostFace()[3]);
        break;
      case INTERIOR_KERNEL:
      case UBER_KERNEL:
      case KERNEL_POLICY:
        flops += clover_flops * in.Volume();
 
        if (arg.kernel_type == KERNEL_POLICY) break;
        // now correct for flops done by exterior kernel
        long long ghost_sites = 0;
        for (int d = 0; d < 4; d++)
          if (arg.commDim[d]) ghost_sites += 2 * in.GhostFace()[d];
        flops -= clover_flops * ghost_sites;
 
        break;
      }
      return flops;
    }
 
    long long bytes() const
    {
      int clover_bytes = 72 * in.Precision() + (isFixed<typename Arg::Float>::value ? 2 * sizeof(float) : 0);
 
      long long bytes = Dslash::bytes();
      switch (arg.kernel_type) {
      case EXTERIOR_KERNEL_X:
      case EXTERIOR_KERNEL_Y:
      case EXTERIOR_KERNEL_Z:
      case EXTERIOR_KERNEL_T: bytes += clover_bytes * 2 * in.GhostFace()[arg.kernel_type]; break;
      case EXTERIOR_KERNEL_ALL:
        bytes += clover_bytes * 2 * (in.GhostFace()[0] + in.GhostFace()[1] + in.GhostFace()[2] + in.GhostFace()[3]);
        break;
      case INTERIOR_KERNEL:
      case UBER_KERNEL:
      case KERNEL_POLICY:
        bytes += clover_bytes * in.Volume();
 
        if (arg.kernel_type == KERNEL_POLICY) break;
        // now correct for bytes done by exterior kernel
        long long ghost_sites = 0;
        for (int d = 0; d < 4; d++)
          if (arg.commDim[d]) ghost_sites += 2 * in.GhostFace()[d];
        bytes -= clover_bytes * ghost_sites;
 
        break;
      }
 
      return bytes;
    }
 
  };
 
  template <typename Float, int nColor, QudaReconstructType recon> struct WilsonCloverPreconditionedApply {
 
    inline WilsonCloverPreconditionedApply(ColorSpinorField &out, const ColorSpinorField &in, const GaugeField &U,
        const CloverField &A, double a, const ColorSpinorField &x, int parity, bool dagger, const int *comm_override,
        TimeProfile &profile)
    {
      constexpr int nDim = 4;
      WilsonCloverArg<Float, nColor, nDim, recon> arg(out, in, U, A, a, x, parity, dagger, comm_override);
      WilsonCloverPreconditioned<decltype(arg)> wilson(arg, out, in);
 
      dslash::DslashPolicyTune<decltype(wilson)> policy(wilson,
          const_cast<cudaColorSpinorField *>(static_cast<const cudaColorSpinorField *>(&in)), in.VolumeCB(),
          in.GhostFaceCB(), profile);
      policy.apply(0);
    }
  };
 
  // Apply the preconditioned Wilson-clover operator
  // out(x) = M*in = a * A(x)^{-1} (\sum_mu U_{-\mu}(x)in(x+mu) + U^\dagger_mu(x-mu)in(x-mu))
  // Uses the kappa normalization for the Wilson operator.
  void ApplyWilsonCloverPreconditioned(ColorSpinorField &out, const ColorSpinorField &in, const GaugeField &U,
      const CloverField &A, double a, const ColorSpinorField &x, int parity, bool dagger, const int *comm_override,
      TimeProfile &profile)
  {
#ifdef GPU_CLOVER_DIRAC
    instantiate<WilsonCloverPreconditionedApply>(out, in, U, A, a, x, parity, dagger, comm_override, profile);
#else
    errorQuda("Clover dslash has not been built");
#endif
  }
 
} // namespace quda