Visible to Intel only — GUID: GUID-D2F09759-2F8D-4758-8A69-01B1730DA85D
Visible to Intel only — GUID: GUID-D2F09759-2F8D-4758-8A69-01B1730DA85D
mkl_?diagemv
Computes matrix - vector product of a sparse general matrix stored in the diagonal format with one-based indexing (deprecated).
Syntax
call mkl_sdiagemv(transa, m, val, lval, idiag, ndiag, x, y)
call mkl_ddiagemv(transa, m, val, lval, idiag, ndiag, x, y)
call mkl_cdiagemv(transa, m, val, lval, idiag, ndiag, x, y)
call mkl_zdiagemv(transa, m, val, lval, idiag, ndiag, x, y)
Include Files
- mkl.fi
Description
This routine is deprecated, but no replacement is available yet in the Inspector-Executor Sparse BLAS API interfaces. You can continue using this routine until a replacement is provided and this can be fully removed.
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.
This routine supports only one-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 y := A*x
If transa = 'T' or 't' or 'C' or 'c', then y := AT*x,
- m
-
INTEGER. Number of rows of the matrix A.
- val
-
REAL for mkl_sdiagemv.
DOUBLE PRECISION for mkl_ddiagemv.
COMPLEX for mkl_ccsrgemv.
DOUBLE COMPLEX for mkl_zdiagemv.
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
-
INTEGER. Leading dimension of vallval≥m. Refer to lval description in Diagonal Storage Scheme for more details.
- idiag
-
INTEGER. 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
-
INTEGER. Specifies the number of non-zero diagonals of the matrix A.
- x
-
REAL for mkl_sdiagemv.
DOUBLE PRECISION for mkl_ddiagemv.
COMPLEX for mkl_ccsrgemv.
DOUBLE COMPLEX for mkl_zdiagemv.
Array, size is m.
On entry, the array x must contain the vector x.
Output Parameters
- y
-
REAL for mkl_sdiagemv.
DOUBLE PRECISION for mkl_ddiagemv.
COMPLEX for mkl_ccsrgemv.
DOUBLE COMPLEX for mkl_zdiagemv.
Array, size at least m.
On exit, the array y must contain the vector y.
Interfaces
FORTRAN 77:
SUBROUTINE mkl_sdiagemv(transa, m, val, lval, idiag, ndiag, x, y)
CHARACTER*1 transa
INTEGER m, lval, ndiag
INTEGER idiag(*)
REAL val(lval,*), x(*), y(*)
SUBROUTINE mkl_ddiagemv(transa, m, val, lval, idiag, ndiag, x, y)
CHARACTER*1 transa
INTEGER m, lval, ndiag
INTEGER idiag(*)
DOUBLE PRECISION val(lval,*), x(*), y(*)
SUBROUTINE mkl_cdiagemv(transa, m, val, lval, idiag, ndiag, x, y)
CHARACTER*1 transa
INTEGER m, lval, ndiag
INTEGER idiag(*)
COMPLEX val(lval,*), x(*), y(*)
SUBROUTINE mkl_zdiagemv(transa, m, val, lval, idiag, ndiag, x, y)
CHARACTER*1 transa
INTEGER m, lval, ndiag
INTEGER idiag(*)
DOUBLE COMPLEX val(lval,*), x(*), y(*)