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Copy pathMatvecOp.hpp
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99 lines (74 loc) · 2.3 KB
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#ifndef _MatvecOp_hpp_
#define _MatvecOp_hpp_
#ifndef KERNEL_PREFIX
#define KERNEL_PREFIX
#endif
#include <CSRMatrix.hpp>
#include <ELLMatrix.hpp>
#include <ComputeNodeType.hpp>
template<typename MatrixType>
struct MatvecOp {
};
template<>
struct MatvecOp<miniFE::CSRMatrix<MINIFE_SCALAR,MINIFE_LOCAL_ORDINAL,MINIFE_GLOBAL_ORDINAL, ComputeNodeType> > {
MatvecOp(miniFE::CSRMatrix<MINIFE_SCALAR,MINIFE_LOCAL_ORDINAL,MINIFE_GLOBAL_ORDINAL, ComputeNodeType>& A)
: n(A.rows.size()),
Arowoffsets(&A.row_offsets[0]),
Acols(&A.packed_cols[0]),
Acoefs(&A.packed_coefs[0])
{
}
size_t n;
typedef MINIFE_GLOBAL_ORDINAL GlobalOrdinalType;
typedef MINIFE_LOCAL_ORDINAL LocalOrdinalType;
typedef MINIFE_SCALAR ScalarType;
const LocalOrdinalType* Arowoffsets;
const GlobalOrdinalType* Acols;
const ScalarType* Acoefs;
const ScalarType* x;
ScalarType* y;
ScalarType beta;
inline KERNEL_PREFIX void operator()(int row)
{
//we count on the caller (ComputeNode) to pass in 'row'
//in range 0..n-1
ScalarType sum = beta*y[row];
for(LocalOrdinalType i=Arowoffsets[row]; i<Arowoffsets[row+1]; ++i) {
sum += Acoefs[i]*x[Acols[i]];
}
y[row] = sum;
}
};//struct MatvecOp
template<>
struct MatvecOp<miniFE::ELLMatrix<MINIFE_SCALAR,MINIFE_LOCAL_ORDINAL,MINIFE_GLOBAL_ORDINAL, ComputeNodeType> > {
MatvecOp(miniFE::ELLMatrix<MINIFE_SCALAR,MINIFE_LOCAL_ORDINAL,MINIFE_GLOBAL_ORDINAL, ComputeNodeType>& A)
: n(A.rows.size()),
Acols(&A.cols[0]),
Acoefs(&A.coefs[0]),
ncols_per_row(A.num_cols_per_row)
{
}
size_t n;
typedef MINIFE_GLOBAL_ORDINAL GlobalOrdinalType;
typedef MINIFE_LOCAL_ORDINAL LocalOrdinalType;
typedef MINIFE_SCALAR ScalarType;
const GlobalOrdinalType* Acols;
const ScalarType* Acoefs;
int ncols_per_row;
const ScalarType* x;
ScalarType* y;
ScalarType beta;
inline KERNEL_PREFIX void operator()(int row)
{
//we count on the caller (ComputeNode) to pass in 'row'
//in range 0..n-1
ScalarType sum = beta*y[row];
for(LocalOrdinalType i=0; i<ncols_per_row; ++i) {
GlobalOrdinalType col = Acols[row*ncols_per_row + i];
ScalarType coef = Acoefs[row*ncols_per_row + i];
if (coef != 0) sum += coef*x[col];
}
y[row] = sum;
}
};//struct MatvecOp
#endif