Developer Reference

  • 2020.2
  • 07/15/2020
  • Public Content
Contents

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. 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
:=
A
T
*
x
,
where:
x
and
y
are vectors,
A
is an
m
-by-
m
sparse square matrix in the diagonal storage format,
A
T
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
:=
A
T
*
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
val
lval
m
. Refer to
lval
description in Diagonal Storage Scheme for more details.