Developer Reference

Contents

mkl_?diagemv

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

Syntax

void
mkl_sdiagemv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
float
*val
,
const
MKL_INT
*lval
,
const
MKL_INT
*idiag
,
const
MKL_INT
*ndiag
,
const
float
*x
,
float
*y
);
void
mkl_ddiagemv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
double
*val
,
const
MKL_INT
*lval
,
const
MKL_INT
*idiag
,
const
MKL_INT
*ndiag
,
const
double
*x
,
double
*y
);
void
mkl_cdiagemv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
MKL_Complex8
*val
,
const
MKL_INT
*lval
,
const
MKL_INT
*idiag
,
const
MKL_INT
*ndiag
,
const
MKL_Complex8
*x
,
MKL_Complex8
*y
);
void
mkl_zdiagemv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
MKL_Complex16
*val
,
const
MKL_INT
*lval
,
const
MKL_INT
*idiag
,
const
MKL_INT
*ndiag
,
const
MKL_Complex16
*x
,
MKL_Complex16
*y
);
Include Files
  • mkl.h
Description
This routine is deprecated. Use mkl_sparse_?_mv from the
Intel® MKL
Inspector-executor Sparse BLAS interface instead.
The
mkl_?diagemv
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 diagonal storage format,
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
y
:=
A
*
x
If
transa
=
'T'
or
't'
or
'C'
or
'c'
, then
y
:=
A
T
*
x
,
m
Number of rows of the matrix
A
.
val
Two-dimensional array of size
lval
*
ndiag
, contains non-zero diagonals of the matrix
A
. Refer to
values
array description in Diagonal Storage Scheme for more details.
lval
Leading dimension of
val
lval
m
. Refer to
lval
description in Diagonal Storage Scheme for more details.
idiag
Array of length
ndiag
, contains the distances between main diagonal and each non-zero diagonals in the matrix
A
.
Refer to
distance
array description in Diagonal Storage Scheme for more details.
ndiag
Specifies the number of non-zero diagonals of the matrix
A
.
x
Array, size is
m
.
On 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

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