Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

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

mkl_cspblas_?bsrsymv

Computes matrix-vector product of a sparse symmetrical matrix stored in the BSR format (3-arrays variation) with zero-based indexing (deprecated).

Syntax

void
mkl_cspblas_sbsrsymv
(
const
char
*uplo
,
const
MKL_INT
*m
,
const
MKL_INT
*lb
,
const
float
*a
,
const
MKL_INT
*ia
,
const
MKL_INT
*ja
,
const
float
*x
,
float
*y
);
void
mkl_cspblas_dbsrsymv
(
const
char
*uplo
,
const
MKL_INT
*m
,
const
MKL_INT
*lb
,
const
double
*a
,
const
MKL_INT
*ia
,
const
MKL_INT
*ja
,
const
double
*x
,
double
*y
);
void
mkl_cspblas_cbsrsymv
(
const
char
*uplo
,
const
MKL_INT
*m
,
const
MKL_INT
*lb
,
const
MKL_Complex8
*a
,
const
MKL_INT
*ia
,
const
MKL_INT
*ja
,
const
MKL_Complex8
*x
,
MKL_Complex8
*y
);
void
mkl_cspblas_zbsrsymv
(
const
char
*uplo
,
const
MKL_INT
*m
,
const
MKL_INT
*lb
,
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_?bsrsymv
 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 BSR format (3-array variation) with zero-based indexing.
This routine supports only zero-based indexing of the input arrays.
Input Parameters
 
uplo
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
Number of block rows of the matrix
A
.
lb
Size of the block in the matrix
A
.
a
Array containing elements of non-zero blocks of the matrix
A
. Its length is equal to the number of non-zero blocks in the matrix
A
 multiplied by
lb
*
lb
. Refer to
values
 array description in BSR Format for more details.
ia
Array of length
(
m
 + 1)
, containing indices of block 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-zero blocks. Refer to
rowIndex
 array description in BSR Format for more details.
ja
Array containing the column indices for each non-zero block in the matrix
A
.
Its length is equal to the number of non-zero blocks of the matrix
A
. Refer to
columns
 array description in BSR Format for more details.
x
Array, size
(
m
*
lb
)
.
On entry, the array
x
 must contain the vector
x
.
Output Parameters
y
Array, size at least
(
m
*
lb
)
.
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.