dcg_init
dcg_init
Initializes the solver.
Syntax
void
dcg_init
(
const
MKL_INT
*n
,
const
double
*x
,
const
double
*b
,
MKL_INT
*RCI_request
,
MKL_INT
*ipar
,
double
*dpar
,
double
*tmp
);
Include Files
- mkl.h
Description
The routine RCI CG routines use the values of all parameters returned by the routine
dcg_init
initializes the solver. After initialization, all subsequent invocations of the Intel® oneAPI Math Kernel Library
dcg_init
. Advanced users can skip this step and set the values in the ipar
and dpar
arrays directly.You can modify the contents of these arrays after they are passed to the solver routine only if you are sure that the values are correct and consistent. You can perform a basic check for correctness and consistency by calling the
dcg_check
routine, but it does not guarantee that the method will work correctly.Input Parameters
- n
- Sets the size of the problem.
- x
- Array of sizen. Contains the initial approximation to the solution vector. Normally it is equal to 0 or tob.
- b
- Array of sizen. Contains the right-hand side vector.
Output Parameters
- RCI_request
- Gives information about the result of the routine.
- ipar
- Array of size128. Refer to the CG Common Parameters.
- dpar
- Array of size128. Refer to the CG Common Parameters.
- tmp
- Array of size(. Refer to the CG Common Parameters.n*4)
Return Values
- RCI_request= 0
- Indicates that the task completed normally.
- RCI_request= -10000
- Indicates failure to complete the task.