Visible to Intel only — GUID: GUID-A04BCE4E-D0E3-4C42-9745-0E4C8CC45A2E
Visible to Intel only — GUID: GUID-A04BCE4E-D0E3-4C42-9745-0E4C8CC45A2E
mkl_cspblas_?csrgemv
Computes matrix - vector product of a sparse general matrix stored in the CSR format (3-array variation) with zero-based indexing (deprecated).
Syntax
call mkl_cspblas_scsrgemv(transa, m, a, ia, ja, x, y)
call mkl_cspblas_dcsrgemv(transa, m, a, ia, ja, x, y)
call mkl_cspblas_ccsrgemv(transa, m, a, ia, ja, x, y)
call mkl_cspblas_zcsrgemv(transa, m, a, ia, ja, x, 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_cspblas_?csrgemv 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 CSR format (3-array variation) with zero-based indexing, AT is the transpose of A.
This routine supports only zero-based indexing of the input arrays.
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 the matrix-vector product is computed as y := A*x
If transa = 'T' or 't' or 'C' or 'c', then the matrix-vector product is computed as y := AT*x,
- m
-
INTEGER. Number of rows of the matrix A.
- a
-
REAL for mkl_cspblas_scsrgemv.
DOUBLE PRECISION for mkl_cspblas_dcsrgemv.
COMPLEX for mkl_cspblas_ccsrgemv.
DOUBLE COMPLEX for mkl_cspblas_zcsrgemv.
Array containing non-zero elements of the matrix A. Its length is equal to the number of non-zero elements in the matrix A. Refer to values array description in Sparse Matrix Storage Formats for more details.
- ia
-
INTEGER. Array of length m + 1, containing indices of elements in the array a, such that ia(I) is the index in the array a of the first non-zero element from the row I. The value of the last element ia(m) is equal to the number of non-zeros. Refer to rowIndex array description in Sparse Matrix Storage Formats for more details.
- ja
-
INTEGER. Array containing the column indices for each non-zero element of the matrix A.
Its length is equal to the length of the array a. Refer to columns array description in Sparse Matrix Storage Formats for more details.
- x
-
REAL for mkl_cspblas_scsrgemv.
DOUBLE PRECISION for mkl_cspblas_dcsrgemv.
COMPLEX for mkl_cspblas_ccsrgemv.
DOUBLE COMPLEX for mkl_cspblas_zcsrgemv.
Array, size is m.
One entry, the array x must contain the vector x.
Output Parameters
- y
-
REAL for mkl_cspblas_scsrgemv.
DOUBLE PRECISION for mkl_cspblas_dcsrgemv.
COMPLEX for mkl_cspblas_ccsrgemv.
DOUBLE COMPLEX for mkl_cspblas_zcsrgemv.
Array, size at least m.
On exit, the array y must contain the vector y.
Interfaces
FORTRAN 77:
SUBROUTINE mkl_cspblas_scsrgemv(transa, m, a, ia, ja, x, y)
CHARACTER*1 transa
INTEGER m
INTEGER ia(*), ja(*)
REAL a(*), x(*), y(*)
SUBROUTINE mkl_cspblas_dcsrgemv(transa, m, a, ia, ja, x, y)
CHARACTER*1 transa
INTEGER m
INTEGER ia(*), ja(*)
DOUBLE PRECISION a(*), x(*), y(*)
SUBROUTINE mkl_cspblas_ccsrgemv(transa, m, a, ia, ja, x, y)
CHARACTER*1 transa
INTEGER m
INTEGER ia(*), ja(*)
COMPLEX a(*), x(*), y(*)
SUBROUTINE mkl_cspblas_zcsrgemv(transa, m, a, ia, ja, x, y)
CHARACTER*1 transa
INTEGER m
INTEGER ia(*), ja(*)
DOUBLE COMPLEX a(*), x(*), y(*)