Visible to Intel only — GUID: GUID-AB4F572A-6B78-420E-AB66-ACE0C5BB3654
Visible to Intel only — GUID: GUID-AB4F572A-6B78-420E-AB66-ACE0C5BB3654
mkl_?coosv
Solves a system of linear equations for a sparse matrix in the coordinate format (deprecated).
Syntax
call mkl_scoosv(transa, m, alpha, matdescra, val, rowind, colind, nnz, x, y)
call mkl_dcoosv(transa, m, alpha, matdescra, val, rowind, colind, nnz, x, y)
call mkl_ccoosv(transa, m, alpha, matdescra, val, rowind, colind, nnz, x, y)
call mkl_zcoosv(transa, m, alpha, matdescra, val, rowind, colind, nnz, x, y)
Include Files
- mkl.fi
Description
This routine is deprecated. Use mkl_sparse_?_trsvfrom the Intel® oneAPI Math Kernel Library (oneMKL) Inspector-executor Sparse BLAS interface instead.
The mkl_?coosv routine solves a system of linear equations with matrix-vector operations for a sparse matrix in the coordinate format:
y := alpha*inv(A)*x
or
y := alpha*inv(AT)*x,
where:
alpha is scalar, x and y are vectors, A is a sparse upper or lower triangular matrix with unit or non-unit main diagonal, 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 system of linear equations.
If transa = 'N' or 'n', then y := alpha*inv(A)*x
If transa = 'T' or 't' or 'C' or 'c', then y := alpha*inv(AT)* x,
- m
-
INTEGER. Number of rows of the matrix A.
- alpha
-
REAL for mkl_scoosv.
DOUBLE PRECISION for mkl_dcoosv.
COMPLEX for mkl_ccoosv.
DOUBLE COMPLEX for mkl_zcoosv.
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_scoosv.
DOUBLE PRECISION for mkl_dcoosv.
COMPLEX for mkl_ccoosv.
DOUBLE COMPLEX for mkl_zcoosv.
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_scoosv.
DOUBLE PRECISION for mkl_dcoosv.
COMPLEX for mkl_ccoosv.
DOUBLE COMPLEX for mkl_zcoosv.
Array, size at least m.
On entry, the array x must contain the vector x. The elements are accessed with unit increment.
- y
-
REAL for mkl_scoosv.
DOUBLE PRECISION for mkl_dcoosv.
COMPLEX for mkl_ccoosv.
DOUBLE COMPLEX for mkl_zcoosv.
Array, size at least m.
On entry, the array y must contain the vector y. The elements are accessed with unit increment.
Output Parameters
- y
-
Contains solution vector x.
Interfaces
FORTRAN 77:
SUBROUTINE mkl_scoosv(transa, m, alpha, matdescra, val, rowind, colind, nnz, x, y)
CHARACTER*1 transa
CHARACTER matdescra(*)
INTEGER m, nnz
INTEGER rowind(*), colind(*)
REAL alpha
REAL val(*)
REAL x(*), y(*)
SUBROUTINE mkl_dcoosv(transa, m, alpha, matdescra, val, rowind, colind, nnz, x, y)
CHARACTER*1 transa
CHARACTER matdescra(*)
INTEGER m, nnz
INTEGER rowind(*), colind(*)
DOUBLE PRECISION alpha
DOUBLE PRECISION val(*)
DOUBLE PRECISION x(*), y(*)
SUBROUTINE mkl_ccoosv(transa, m, alpha, matdescra, val, rowind, colind, nnz, x, y)
CHARACTER*1 transa
CHARACTER matdescra(*)
INTEGER m, nnz
INTEGER rowind(*), colind(*)
COMPLEX alpha
COMPLEX val(*)
COMPLEX x(*), y(*)
SUBROUTINE mkl_zcoosv(transa, m, alpha, matdescra, val, rowind, colind, nnz, x, y)
CHARACTER*1 transa
CHARACTER matdescra(*)
INTEGER m, nnz
INTEGER rowind(*), colind(*)
DOUBLE COMPLEX alpha
DOUBLE COMPLEX val(*)
DOUBLE COMPLEX x(*), y(*)