/usr/include/trilinos/Kokkos_CrsMatrix_MKL.hpp is in libtrilinos-kokkos-kernels-dev 12.12.1-5.
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// KokkosKernels 0.9: Linear Algebra and Graph Kernels
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#ifndef KOKKOS_CRSMATRIX_MKL_HPP
#define KOKKOS_CRSMATRIX_MKL_HPP
/// \file Kokkos_CrsMatrix_MKL.hpp
/// \brief Intel MKL version of Kokkos' sparse matrix interface
#include <impl/Kokkos_PhysicalLayout.hpp>
namespace Kokkos {
/// \brief Attempt to compute y = s_a * A * x using Intel MKL.
///
/// If the given combination of scalar types is not supported, do
/// nothing and return false; otherwise, compute y = s_a * A * x and
/// return true.
template<typename T, class RangeVector,class CrsMatrix,class DomainVector>
bool
MV_Multiply_DoMKL (typename Kokkos::Impl::enable_if<
! Kokkos::Impl::is_same<T,double>::value &&
! Kokkos::Impl::is_same<T,float>::value,
typename RangeVector::value_type>::type s_b,
const RangeVector& y,
typename DomainVector::value_type s_a,
const CrsMatrix& A,
const DomainVector& x)
{
return false;
}
template<typename T, class RangeVector,class CrsMatrix,class DomainVector>
bool MV_Multiply_DoMKL(typename Kokkos::Impl::enable_if<Kokkos::Impl::is_same<T,double>::value, double >::type s_b
,const RangeVector & y, double s_a,
const CrsMatrix & A , const DomainVector & x) {
char matdescra[6] = "GLNC0";
char transa = 'N';
int m = A.numRows();
int n = x.dimension_1();
int k = A.numCols();
double* x_ptr = (double*)x.ptr_on_device();
double* y_ptr = (double*)y.ptr_on_device();
if(x.dimension_1()>1) {
Impl::PhysicalLayout layout_x(x);
Impl::PhysicalLayout layout_y(y);
if((layout_x.layout_type!=layout_x.Right) || layout_y.layout_type!=layout_y.Right) return false;
int stride_x = layout_x.stride[0];
int stride_y = layout_y.stride[0];
// FIXME (mfh 09 Aug 2013) Doesn't this interface only work with
// row-major multivectors? I recall that only the "Fortran"
// version works with column-major multivectors, and it requires
// that the column indices be one-based.
mkl_dcsrmm(&transa,
&m, &n, &k,
&s_a,
matdescra,
A.values.ptr_on_device(),
A.graph.entries.ptr_on_device(),
(int*) &A.graph.row_map(0),
(int*) &A.graph.row_map(1),
x_ptr,
&stride_x,
&s_b,
y_ptr,
&stride_y);
} else
mkl_dcsrmv(&transa,
&m, &k,
&s_a,
matdescra,
A.values.ptr_on_device(),
A.graph.entries.ptr_on_device(),
(int*) &A.graph.row_map(0),
(int*) &A.graph.row_map(1),
x_ptr,
&s_b,
y_ptr);
return true;
}
template<typename T, class RangeVector,class CrsMatrix,class DomainVector>
bool MV_Multiply_DoMKL(typename Kokkos::Impl::enable_if<Kokkos::Impl::is_same<T,float>::value, float >::type s_b
,const RangeVector & y, float s_a,
const CrsMatrix & A , const DomainVector & x) {
char matdescra[6] = "GLNC0";
int stride_x = layout_x.stride[0];
int stride_y = layout_y.stride[0];
char transa = 'N';
int m = A.numRows();
int n = x.dimension_1();
int k = A.numCols();
float* x_ptr = (float*)x.ptr_on_device();
float* y_ptr = (float*)y.ptr_on_device();
if(x.dimension_1()>1) {
Impl::PhysicalLayout layout_x(x);
Impl::PhysicalLayout layout_y(y);
if((layout_x.layout_type!=layout_x.Right) || layout_y.layout_type!=layout_y.Right) return false;
mkl_scsrmm(&transa,
&m, &n, &k,
&s_a,
matdescra,
A.values.ptr_on_device(),
A.graph.entries.ptr_on_device(),
(int*) &A.graph.row_map(0),
(int*) &A.graph.row_map(1),
x_ptr,
&stride_x,
&s_b,
y_ptr,
&stride_y);
} else
mkl_scsrmv(&transa,
&m, &k,
&s_a,
matdescra,
A.values.ptr_on_device(),
A.graph.entries.ptr_on_device(),
(int*) &A.graph.row_map(0),
(int*) &A.graph.row_map(1),
x_ptr,
&s_b,
y_ptr);
return true;
}
//ToDo: strip compatible type attributes (const, volatile); make type of s_b and s_a independent
template<class RangeVector,class CrsMatrix,class DomainVector>
bool MV_Multiply_Try_MKL( typename RangeVector::value_type s_b,const RangeVector & y, typename DomainVector::value_type s_a,
const CrsMatrix & A , const DomainVector & x)
{
if( ! Kokkos::Impl::is_same<typename RangeVector::execution_space::memory_space,typename Kokkos::HostSpace>::value ) return false;
if(Kokkos::Impl::is_same<typename RangeVector::non_const_value_type,float>::value&&
Kokkos::Impl::is_same<typename DomainVector::non_const_value_type,float>::value&&
Kokkos::Impl::is_same<typename CrsMatrix::values_type::non_const_value_type,float>::value) {
return MV_Multiply_DoMKL<typename RangeVector::value_type,RangeVector,CrsMatrix,DomainVector>(s_b,y,s_a,A,x);
} else
if(Kokkos::Impl::is_same<typename RangeVector::non_const_value_type,double>::value&&
Kokkos::Impl::is_same<typename DomainVector::non_const_value_type,double>::value&&
Kokkos::Impl::is_same<typename CrsMatrix::values_type::non_const_value_type,double>::value) {
return MV_Multiply_DoMKL<typename RangeVector::value_type,RangeVector,CrsMatrix,DomainVector>(s_b,y,s_a,A,x);
} else
return false;
}
}
#endif // KOKKOS_CRSMATRIX_MKL_HPP
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