call p%bld(a,desc_a,info)
This routine builds the one-level preconditioner p according to the requirements
made by the user through the routines init and set
(see Sections 6.4 and 6.5 for multi-level preconditioners).
Arguments
a |
type(psb_xspmat_type), intent(in). |
| The sparse matrix structure containing the local part of the matrix to be preconditioned. Note that x must be chosen according to the real/complex, single/double precision version of MLD2P4 under use. See the PSBLAS User's Guide for details [16]. | |
desc_a |
type(psb_desc_type), intent(in). |
The communication descriptor of a. See the PSBLAS User's Guide for
details [16]. |
|
info |
integer, intent(out). |
| Error code. If no error, 0 is returned. See Section 8 for details. |
For compatibility with the previous versions of MLD2P4, this routine can be also invoked as follows:
call mld_precbld(p,what,val,info)
In this case, the routine can be used to build multi-level preconditioners too.