Developer Reference

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

mkl_?skymv

Computes matrix - vector product for a sparse matrix in the skyline storage format with one-based indexing (deprecated).

Syntax

call mkl_sskymv
(
transa
,
m
,
k
,
alpha
,
matdescra
,
val
,
pntr
,
x
,
beta
,
y
)
call mkl_dskymv
(
transa
,
m
,
k
,
alpha
,
matdescra
,
val
,
pntr
,
x
,
beta
,
y
)
call mkl_cskymv
(
transa
,
m
,
k
,
alpha
,
matdescra
,
val
,
pntr
,
x
,
beta
,
y
)
call mkl_zskymv
(
transa
,
m
,
k
,
alpha
,
matdescra
,
val
,
pntr
,
x
,
beta
,
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_?skymv
routine performs a matrix-vector operation defined as
y
:=
alpha
*
A
*
x
+
beta
*
y
or
y
:=
alpha
*
A
T
*
x
+
beta
*
y
,
where:
alpha
and
beta
are scalars,
x
and
y
are vectors,
A
is an
m
-by-
k
sparse matrix stored using the skyline storage scheme,
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
:=
alpha
*
A
*
x
+
beta
*
y
If
transa
=
'T'
or
't'
or
'C'
or
'c'
, then
y
:=
alpha
*
A
T
*
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_sskymv
.