Computes matrix - vector product of a sparse general matrix stored in the diagonal format with one-based indexing (deprecated).

Syntax

void mkl_sdiagemv (const char *transa , const MKL_INT *m , const float *val , const MKL_INT *lval , const MKL_INT *idiag , const MKL_INT *ndiag , const float *x , float *y );

void mkl_ddiagemv (const char *transa , const MKL_INT *m , const double *val , const MKL_INT *lval , const MKL_INT *idiag , const MKL_INT *ndiag , const double *x , double *y );

void mkl_cdiagemv (const char *transa , const MKL_INT *m , const MKL_Complex8 *val , const MKL_INT *lval , const MKL_INT *idiag , const MKL_INT *ndiag , const MKL_Complex8 *x , MKL_Complex8 *y );

void mkl_zdiagemv (const char *transa , const MKL_INT *m , const MKL_Complex16 *val , const MKL_INT *lval , const MKL_INT *idiag , const MKL_INT *ndiag , const MKL_Complex16 *x , MKL_Complex16 *y );

Include Files

  • mkl.h

Description

This routine is deprecated. Use mkl_sparse_?_mv from the Intel MKL Inspector-executor Sparse BLAS interface instead.

The mkl_?diagemv routine performs a matrix-vector operation defined as

y := A*x

or

y := AT*x,

where:

x and y are vectors,

A is an m-by-m sparse square matrix in the diagonal storage format, AT is the transpose of A.

Note

This routine supports only one-based indexing of the input arrays.

Input Parameters

transa

Specifies the operation.

If transa = 'N' or 'n', then y := A*x

If transa = 'T' or 't' or 'C' or 'c', then y := AT*x,

m

Number of rows of the matrix A.

val

Two-dimensional array of size lval*ndiag, contains non-zero diagonals of the matrix A. Refer to values array description in Diagonal Storage Scheme for more details.

lval

Leading dimension of vallvalm. Refer to lval description in Diagonal Storage Scheme for more details.

idiag

Array of length ndiag, contains the distances between main diagonal and each non-zero diagonals in the matrix A.

Refer to distance array description in Diagonal Storage Scheme for more details.

ndiag

Specifies the number of non-zero diagonals of the matrix A.

x

Array, size is m.

On entry, the array x must contain the vector x.

Output Parameters

y

Array, size at least m.

On exit, the array y must contain the vector y.

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