Developer Reference

  • 098
  • 03/30/2020
  • Public Content
Contents

mkl_?csrmv

Computes matrix - vector product of a sparse matrix stored in the CSR format (deprecated).

Syntax

call mkl_scsrmv
(
transa
,
m
,
k
,
alpha
,
matdescra
,
val
,
indx
,
pntrb
,
pntre
,
x
,
beta
,
y
)
call mkl_dcsrmv
(
transa
,
m
,
k
,
alpha
,
matdescra
,
val
,
indx
,
pntrb
,
pntre
,
x
,
beta
,
y
)
call mkl_ccsrmv
(
transa
,
m
,
k
,
alpha
,
matdescra
,
val
,
indx
,
pntrb
,
pntre
,
x
,
beta
,
y
)
call mkl_zcsrmv
(
transa
,
m
,
k
,
alpha
,
matdescra
,
val
,
indx
,
pntrb
,
pntre
,
x
,
beta
,
y
)
Include Files
  • mkl.fi
Description
This routine is deprecated. Use mkl_sparse_?_mvfrom the
Intel® MKL
Inspector-executor Sparse BLAS interface instead.
The
mkl_?csrmv
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 in the CSR format,
A
T
is the transpose of
A
.
This routine supports a CSR 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 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_scsrmv
.
DOUBLE PRECISION
for
mkl_dcsrmv
.
COMPLEX
for
mkl_ccsrmv
.
DOUBLE COMPLEX
for
mkl_zcsrmv
.
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
(