Developer Reference

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

mkl_?csrsymv

Computes matrix - vector product of a sparse symmetrical matrix stored in the CSR format (3-array variation) with one-based indexing (deprecated).

Syntax

call mkl_scsrsymv
(
uplo
,
m
,
a
,
ia
,
ja
,
x
,
y
)
call mkl_dcsrsymv
(
uplo
,
m
,
a
,
ia
,
ja
,
x
,
y
)
call mkl_ccsrsymv
(
uplo
,
m
,
a
,
ia
,
ja
,
x
,
y
)
call mkl_zcsrsymv
(
uplo
,
m
,
a
,
ia
,
ja
,
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_?csrsymv
routine performs a matrix-vector operation defined as
y
:=
A
*
x
where:
x
and
y
are vectors,
A
is an upper or lower triangle of the symmetrical sparse matrix in the CSR format (3-array variation).
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.
 
uplo
CHARACTER*1
.
Specifies whether the upper or low triangle of the matrix
A
is used.
If
uplo
=
'U'
or
'u'
, then the upper triangle of the matrix
A
is used.
If
uplo
=
'L'
or
'l'
, then the low triangle of the matrix
A
is used.
m
INTEGER
.
Number of rows of the matrix
A
.
a
REAL
for
mkl_scsrsymv
.
DOUBLE PRECISION
for
mkl_dcsrsymv
.
COMPLEX
for
mkl_ccsrsymv
.
DOUBLE COMPLEX
for
mkl_zcsrsymv
.
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
+ 1)
is equal to the number of non-zeros
plus one
. 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