Developer Reference

  • 2021.1
  • 12/04/2020
  • Public Content
Contents

mkl_cspblas_?csrgemv

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

Syntax

void
mkl_cspblas_scsrgemv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
float
*a
,
const
MKL_INT
*ia
,
const
MKL_INT
*ja
,
const
float
*x
,
float
*y
);
void
mkl_cspblas_dcsrgemv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
double
*a
,
const
MKL_INT
*ia
,
const
MKL_INT
*ja
,
const
double
*x
,
double
*y
);
void
mkl_cspblas_ccsrgemv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
MKL_Complex8
*a
,
const
MKL_INT
*ia
,
const
MKL_INT
*ja
,
const
MKL_Complex8
*x
,
MKL_Complex8
*y
);
void
mkl_cspblas_zcsrgemv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
MKL_Complex16
*a
,
const
MKL_INT
*ia
,
const
MKL_INT
*ja
,
const
MKL_Complex16
*x
,
MKL_Complex16
*y
);
Include Files
  • mkl.h
Description
This routine is deprecated. Use mkl_sparse_?_mvfrom the
Intel® oneAPI Math Kernel Library
Inspector-executor Sparse BLAS interface instead.
The
mkl_cspblas_?csrgemv
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 CSR format (3-array variation) with zero-based indexing,
A
T
is the transpose of
A
.
This routine supports only zero-based indexing of the input arrays.
Input Parameters
transa
Specifies the operation.
If
transa
=
'N'
or
'n'
, then the matrix-vector product is computed as
y
:=
A
*
x
If
transa
=
'T'
or
't'
or
'C'
or
'c'
, then the matrix-vector product is computed as
y
:=
A
T
*
x
,
m
Number of rows of the matrix
A
.
a
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
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
]
is equal to the number of non-zeros. Refer to
rowIndex
array description in Sparse Matrix Storage Formats for more details.
ja
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 for more details.
x
Array, size is
m
.
One entry, the array
x
must contain the vector
x
.
Output Parameters
y
Array, size at least
m
.
On exit, the array
y
must contain the vector
y
.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.