Visible to Intel only — GUID: GUID-C03DEEF6-BEA5-4F50-9F35-24310D6B6C1B
Visible to Intel only — GUID: GUID-C03DEEF6-BEA5-4F50-9F35-24310D6B6C1B
mkl_?coomv
Computes matrix - vector product for a sparse matrix in the coordinate format (deprecated).
Syntax
call mkl_scoomv(transa, m, k, alpha, matdescra, val, rowind, colind, nnz, x, beta, y)
call mkl_dcoomv(transa, m, k, alpha, matdescra, val, rowind, colind, nnz, x, beta, y)
call mkl_ccoomv(transa, m, k, alpha, matdescra, val, rowind, colind, nnz, x, beta, y)
call mkl_zcoomv(transa, m, k, alpha, matdescra, val, rowind, colind, nnz, x, beta, y)
Include Files
- mkl.fi
Description
This routine is deprecated. Use mkl_sparse_?_mvfrom the Intel® oneAPI Math Kernel Library (oneMKL) Inspector-executor Sparse BLAS interface instead.
The mkl_?coomv routine performs a matrix-vector operation defined as
y := alpha*A*x + beta*y
or
y := alpha*AT*x + beta*y,
where:
alpha and beta are scalars,
x and y are vectors,
A is an m-by-k sparse matrix in compressed coordinate format, AT is the transpose of A.
This routine supports a coordinate format both with one-based indexing and zero-based indexing.
Input Parameters
Parameter descriptions are common for all implemented interfaces with the exception of data types that refer here to the FORTRAN 77 standard types. Data types specific to the different interfaces are described in the section "Interfaces" below.
- transa
-
CHARACTER*1. Specifies the operation.
If transa = 'N' or 'n', then y := alpha*A*x + beta*y
If transa = 'T' or 't' or 'C' or 'c', then y := alpha*AT*x + beta*y,
- m
-
INTEGER. Number of rows of the matrix A.
- k
-
INTEGER. Number of columns of the matrix A.
- alpha
-
REAL for mkl_scoomv.
DOUBLE PRECISION for mkl_dcoomv.
COMPLEX for mkl_ccoomv.
DOUBLE COMPLEX for mkl_zcoomv.
Specifies the scalar alpha.
- matdescra
-
CHARACTER. Array of six elements, specifies properties of the matrix used for operation. Only first four array elements are used, their possible values are given in Table “Possible Values of the Parameter matdescra (descra)”. Possible combinations of element values of this parameter are given in Table “Possible Combinations of Element Values of the Parameter matdescra”.
- val
-
REAL for mkl_scoomv.
DOUBLE PRECISION for mkl_dcoomv.
COMPLEX for mkl_ccoomv.
DOUBLE COMPLEX for mkl_zcoomv.
Array of length nnz, contains non-zero elements of the matrix A in the arbitrary order.
Refer to values array description in Coordinate Format for more details.
- rowind
-
INTEGER. Array of length nnz, contains the row indices for each non-zero element of the matrix A.
Refer to rows array description in Coordinate Format for more details.
- colind
-
INTEGER. Array of length nnz, contains the column indices for each non-zero element of the matrix A.
Refer to columns array description in Coordinate Format for more details.
- nnz
-
INTEGER. Specifies the number of non-zero element of the matrix A.
Refer to nnz description in Coordinate Format for more details.
- x
-
REAL for mkl_scoomv.
DOUBLE PRECISION for mkl_dcoomv.
COMPLEX for mkl_ccoomv.
DOUBLE COMPLEX for mkl_zcoomv.
Array, size at least k if transa = 'N' or 'n' and at least m otherwise. On entry, the array x must contain the vector x.
- beta
-
REAL for mkl_scoomv.
DOUBLE PRECISION for mkl_dcoomv.
COMPLEX for mkl_ccoomv.
DOUBLE COMPLEX for mkl_zcoomv.
Specifies the scalar beta.
- y
-
REAL for mkl_scoomv.
DOUBLE PRECISION for mkl_dcoomv.
COMPLEX for mkl_ccoomv.
DOUBLE COMPLEX for mkl_zcoomv.
Array, size at least m if transa = 'N' or 'n' and at least k otherwise. On entry, the array y must contain the vector y.
Output Parameters
- y
-
Overwritten by the updated vector y.
Interfaces
FORTRAN 77:
SUBROUTINE mkl_scoomv(transa, m, k, alpha, matdescra, val, rowind, colind, nnz, x, beta, y)
CHARACTER*1 transa
CHARACTER matdescra(*)
INTEGER m, k, nnz
INTEGER rowind(*), colind(*)
REAL alpha, beta
REAL val(*), x(*), y(*)
SUBROUTINE mkl_dcoomv(transa, m, k, alpha, matdescra, val, rowind, colind, nnz, x, beta, y)
CHARACTER*1 transa
CHARACTER matdescra(*)
INTEGER m, k, nnz
INTEGER rowind(*), colind(*)
DOUBLE PRECISION alpha, beta
DOUBLE PRECISION val(*), x(*), y(*)
SUBROUTINE mkl_ccoomv(transa, m, k, alpha, matdescra, val, rowind, colind, nnz, x, beta, y)
CHARACTER*1 transa
CHARACTER matdescra(*)
INTEGER m, k, nnz
INTEGER rowind(*), colind(*)
COMPLEX alpha, beta
COMPLEX val(*), x(*), y(*)
SUBROUTINE mkl_zcoomv(transa, m, k, alpha, matdescra, val, rowind, colind, nnz, x, beta, y)
CHARACTER*1 transa
CHARACTER matdescra(*)
INTEGER m, k, nnz
INTEGER rowind(*), colind(*)
DOUBLE COMPLEX alpha, beta
DOUBLE COMPLEX val(*), x(*), y(*)