Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

  • 0.10
  • 10/21/2020
  • Public Content
Contents

mkl_?bsrgemv

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

Syntax

void
mkl_sbsrgemv
(
const
char
*transa
,
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_dbsrgemv
(
const
char
*transa
,
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_cbsrgemv
(
const
char
*transa
,
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_zbsrgemv
(
const
char
*transa
,
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_?bsrgemv
 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
 block sparse square matrix in the BSR format (3-array variation),
A
T
 is the transpose of
A
.
This routine supports only one-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 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
] -
ia
[0]
 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
] -
ia
[0]
 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
plus one
 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

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804