mkl_?cscsv
mkl_?cscsv
Solves a system of linear equations for a sparse matrix in the CSC format (deprecated).
Syntax
void
mkl_scscsv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
float
*alpha
,
const
char
*matdescra
,
const
float
*val
,
const
MKL_INT
*indx
,
const
MKL_INT
*pntrb
,
const
MKL_INT
*pntre
,
const
float
*x
,
float
*y
);
void
mkl_dcscsv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
double
*alpha
,
const
char
*matdescra
,
const
double
*val
,
const
MKL_INT
*indx
,
const
MKL_INT
*pntrb
,
const
MKL_INT
*pntre
,
const
double
*x
,
double
*y
);
void
mkl_ccscsv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
MKL_Complex8
*alpha
,
const
char
*matdescra
,
const
MKL_Complex8
*val
,
const
MKL_INT
*indx
,
const
MKL_INT
*pntrb
,
const
MKL_INT
*pntre
,
const
MKL_Complex8
*x
,
MKL_Complex8
*y
);
void
mkl_zcscsv
(
const
char
*transa
,
const
MKL_INT
*m
,
const
MKL_Complex16
*alpha
,
const
char
*matdescra
,
const
MKL_Complex16
*val
,
const
MKL_INT
*indx
,
const
MKL_INT
*pntrb
,
const
MKL_INT
*pntre
,
const
MKL_Complex16
*x
,
MKL_Complex16
*y
);
Include Files
- mkl.h
Description
This routine is deprecated. Use mkl_sparse_?_trsvfrom the Inspector-executor Sparse BLAS interface instead.
Intel® oneAPI Math Kernel Library
The
mkl_?cscsv
routine solves a system of linear equations with matrix-vector operations for a sparse matrix in the CSC format: y := alpha*inv(A)*x
or
y := alpha*inv(AT)* 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 CSC format both with one-based indexing and zero-based indexing.
Input Parameters
- transa
- Specifies the operation.Ifortransa='N''n', theny:=alpha*inv(A)*xIfortransa='T''t'or'C'or'c', then,y:=alpha*inv(AT)*x
- m
- Number of columns of the matrixA.
- alpha
- Specifies the scalaralpha.
- 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 inTable “Possible Values of the Parameter. Possible combinations of element values of this parameter are given inmatdescra(descra)”Table “Possible Combinations of Element Values of the Parameter.matdescra”
- val
- Array containing non-zero elements of the matrixA.Its length is.-pntre[m-1]pntrb[0]Refer tovaluesarray description in CSC Format for more details.The non-zero elements of the given row of the matrix must be stored in the same order as they appear in the row (from left to right).No diagonal element can be omitted from a sparse storage if the solver is called with the non-unit indicator.
- indx
- For one-based indexing, array containing the row indices plus one for each non-zero element of the matrixA.For zero-based indexing, array containing the row indices for each non-zero element of the matrixA.Its length is equal to length of thevalarray.Refer tocolumnsarray description in CSC Format for more details.Row indices must be sorted in increasing order for each column.
- pntrb
- Array of lengthm.This array contains column indices, such thatis the first index of columnpntrb[i] -pntrb[0]iin the arraysvalandindx.Refer topointerbarray description in CSC Format for more details.
- pntre
- Array of lengthm.This array contains column indices, such thatis the last index of columnpntre[i] -pntrb[0] - 1iin the arraysvalandindx.Refer topointerEarray description in CSC Format for more details.
- x
- Array, size at leastm.On entry, the arrayxmust contain the vectorx. The elements are accessed with unit increment.
- y
- Array, size at leastm.On entry, the arrayymust contain the vectory. The elements are accessed with unit increment.
Output Parameters
- y
- Contains the solution vectorx.