Eigen::internal::tribb_kernel< LhsScalar, RhsScalar, Index, mr, nr, ConjLhs, ConjRhs, UpLo > Struct Template Reference

#include <src/eigen/Eigen/src/Core/products/GeneralMatrixMatrixTriangular.h>

Public Types
enum	{ BlockSize = meta_least_common_multiple<EIGEN_PLAIN_ENUM_MAX(mr,nr),EIGEN_PLAIN_ENUM_MIN(mr,nr)>::ret }
typedef gebp_traits< LhsScalar, RhsScalar, ConjLhs, ConjRhs >	Traits
typedef Traits::ResScalar	ResScalar

Public Member Functions
void	operator() (ResScalar *_res, Index resStride, const LhsScalar *blockA, const RhsScalar *blockB, Index size, Index depth, const ResScalar &alpha)

Detailed Description

template<typename LhsScalar, typename RhsScalar, typename Index, int mr, int nr, bool ConjLhs, bool ConjRhs, int UpLo>
struct Eigen::internal::tribb_kernel< LhsScalar, RhsScalar, Index, mr, nr, ConjLhs, ConjRhs, UpLo >

Member Typedef Documentation

ResScalar

template<typename LhsScalar , typename RhsScalar , typename Index , int mr, int nr, bool ConjLhs, bool ConjRhs, int UpLo>

typedef Traits::ResScalar Eigen::internal::tribb_kernel< LhsScalar, RhsScalar, Index, mr, nr, ConjLhs, ConjRhs, UpLo >::ResScalar

Traits

template<typename LhsScalar , typename RhsScalar , typename Index , int mr, int nr, bool ConjLhs, bool ConjRhs, int UpLo>

typedef gebp_traits<LhsScalar,RhsScalar,ConjLhs,ConjRhs> Eigen::internal::tribb_kernel< LhsScalar, RhsScalar, Index, mr, nr, ConjLhs, ConjRhs, UpLo >::Traits

Member Enumeration Documentation

anonymous enum

template<typename LhsScalar , typename RhsScalar , typename Index , int mr, int nr, bool ConjLhs, bool ConjRhs, int UpLo>

anonymous enum

Enumerator
BlockSize

       {
    BlockSize  = meta_least_common_multiple<EIGEN_PLAIN_ENUM_MAX(mr,nr),EIGEN_PLAIN_ENUM_MIN(mr,nr)>::ret
  };

Member Function Documentation

operator()()

template<typename LhsScalar , typename RhsScalar , typename Index , int mr, int nr, bool ConjLhs, bool ConjRhs, int UpLo>

void Eigen::internal::tribb_kernel< LhsScalar, RhsScalar, Index, mr, nr, ConjLhs, ConjRhs, UpLo >::operator() ( ResScalar *  _res, Index  resStride, const LhsScalar *  blockA, const RhsScalar *  blockB, Index  size, Index  depth, const ResScalar &  alpha  )

inline

  {
    typedef blas_data_mapper<ResScalar, Index, ColMajor> ResMapper;
    ResMapper res(_res, resStride);
    gebp_kernel<LhsScalar, RhsScalar, Index, ResMapper, mr, nr, ConjLhs, ConjRhs> gebp_kernel;
 
    Matrix<ResScalar,BlockSize,BlockSize,ColMajor> buffer((internal::constructor_without_unaligned_array_assert()));
 
    // let's process the block per panel of actual_mc x BlockSize,
    // again, each is split into three parts, etc.
    for (Index j=0; j<size; j+=BlockSize)
    {
      Index actualBlockSize = std::min<Index>(BlockSize,size - j);
      const RhsScalar* actual_b = blockB+j*depth;
 
      if(UpLo==Upper)
        gebp_kernel(res.getSubMapper(0, j), blockA, actual_b, j, depth, actualBlockSize, alpha,
                    -1, -1, 0, 0);
 
      // selfadjoint micro block
      {
        Index i = j;
        buffer.setZero();
        // 1 - apply the kernel on the temporary buffer
        gebp_kernel(ResMapper(buffer.data(), BlockSize), blockA+depth*i, actual_b, actualBlockSize, depth, actualBlockSize, alpha,
                    -1, -1, 0, 0);
        // 2 - triangular accumulation
        for(Index j1=0; j1<actualBlockSize; ++j1)
        {
          ResScalar* r = &res(i, j + j1);
          for(Index i1=UpLo==Lower ? j1 : 0;
              UpLo==Lower ? i1<actualBlockSize : i1<=j1; ++i1)
            r[i1] += buffer(i1,j1);
        }
      }
 
      if(UpLo==Lower)
      {
        Index i = j+actualBlockSize;
        gebp_kernel(res.getSubMapper(i, j), blockA+depth*i, actual_b, size-i, 
                    depth, actualBlockSize, alpha, -1, -1, 0, 0);
      }
    }
  }

References Eigen::internal::tribb_kernel< LhsScalar, RhsScalar, Index, mr, nr, ConjLhs, ConjRhs, UpLo >::BlockSize, Eigen::PlainObjectBase< Derived >::data(), Eigen::Lower, Eigen::PlainObjectBase< Derived >::setZero(), and Eigen::Upper.

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The documentation for this struct was generated from the following file:

• src/eigen/Eigen/src/Core/products/GeneralMatrixMatrixTriangular.h