Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

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

mkl_?coosv

Solves a system of linear equations for a sparse matrix in the coordinate format (deprecated).

Syntax

void
mkl_scoosv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
float
*alpha
,
const
char
*matdescra
,
const
float
*val
,
const
MKL_INT
*rowind
,
const
MKL_INT
*colind
,
const
MKL_INT
*nnz
,
const
float
*x
,
float
*y
);
void
mkl_dcoosv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
double
*alpha
,
const
char
*matdescra
,
const
double
*val
,
const
MKL_INT
*rowind
,
const
MKL_INT
*colind
,
const
MKL_INT
*nnz
,
const
double
*x
,
double
*y
);
void
mkl_ccoosv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
MKL_Complex8
*alpha
,
const
char
*matdescra
,
const
MKL_Complex8
*val
,
const
MKL_INT
*rowind
,
const
MKL_INT
*colind
,
const
MKL_INT
*nnz
,
const
MKL_Complex8
*x
,
MKL_Complex8
*y
);
void
mkl_zcoosv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
MKL_Complex16
*alpha
,
const
char
*matdescra
,
const
MKL_Complex16
*val
,
const
MKL_INT
*rowind
,
const
MKL_INT
*colind
,
const
MKL_INT
*nnz
,
const
MKL_Complex16
*x
,
MKL_Complex16
*y
);
Include Files
  • mkl.h
Description
This routine is deprecated. Use mkl_sparse_?_trsvfrom the
Intel® oneAPI Math Kernel Library
 Inspector-executor Sparse BLAS interface instead.
The
mkl_?coosv
 routine solves a system of linear equations with matrix-vector operations for a sparse matrix in the coordinate format: 
y := alpha*inv(A)*x
or 
y := alpha*inv(A
T
)*x,
where:
alpha
 is scalar,
x
 and
y
 are vectors,
A
 is a sparse upper or lower triangular matrix with unit or non-unit main diagonal,
A
T
 is the transpose of
A
.
This routine supports a coordinate format both with one-based indexing and zero-based indexing.
Input Parameters
transa
Specifies the system of linear equations.
If
transa
 =
'N'
 or
'n'
, then
y
 :=
alpha
*inv(
A
)*
x
If
transa
 =
'T'
 or
't'
 or
'C'
 or
'c'
, then
y
 :=
alpha
*inv(
A
T
)*
x
,
m
Number of rows of the matrix
A
.
alpha
Specifies the scalar
alpha
.
matdescra
Array of six elements, specifies properties of the matrix used for operation. Only first four array elements are used, their possible values are given in
Table “Possible Values of the Parameter
matdescra
 (
descra
)”
. Possible combinations of element values of this parameter are given in
Table “Possible Combinations of Element Values of the Parameter
matdescra
”
.
val
Array of length
nnz
, contains non-zero elements of the matrix
A
 in the arbitrary order.
Refer to
values
 array description in Coordinate Format for more details.
rowind
Array of length
nnz
.
For one-based indexing, contains the row indices plus one for each non-zero element of the matrix
A
.
For zero-based indexing, contains the row indices for each non-zero element of the matrix
A
.
Refer to
rows
 array description in Coordinate Format for more details.
colind
Array of length
nnz
.
For one-based indexing, contains the column indices plus one for each non-zero element of the matrix
A
.
For zero-based indexing, contains the column indices for each non-zero element of the matrix
A
.
Refer to
columns
 array description in Coordinate Format for more details.
nnz
Specifies the number of non-zero element of the matrix
A
.
Refer to
nnz
 description in Coordinate Format for more details.
x
Array, size at least
m
.
On entry, the array
x
 must contain the vector
x
. The elements are accessed with unit increment.
y
Array, size at least
m
.
On entry, the array
y
 must contain the vector
y
. The elements are accessed with unit increment.
Output Parameters
y
Contains solution vector
x
.

Product and Performance Information

1

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