Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

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

mkl_?diasymv

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

Syntax

void
mkl_sdiasymv
(
const
char
*uplo
,
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_ddiasymv
(
const
char
*uplo
,
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_cdiasymv
(
const
char
*uplo
,
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_zdiasymv
(
const
char
*uplo
,
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_?_mvfrom the
Intel® oneAPI Math Kernel Library
 Inspector-executor Sparse BLAS interface instead.
The
mkl_?diasymv
 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.
This routine supports only one-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 rows of the matrix
A
.
val
Two-dimensional array of size
lval
 by
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

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