!!$
!!$
!!$ MLD2P4 version 2.1
!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
!!$ based on PSBLAS (Parallel Sparse BLAS version 3.4)
!!$
!!$ (C) Copyright 2008, 2010, 2012, 2015, 2017
!!$
!!$ Salvatore Filippone Cranfield University
!!$ Ambra Abdullahi Hassan University of Rome Tor Vergata
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
!!$ Pasqua D'Ambra ICAR-CNR, Naples
!!$ Daniela di Serafino Second University of Naples
!!$
!!$ Redistribution and use in source and binary forms, with or without
!!$ modification, are permitted provided that the following conditions
!!$ are met:
!!$ 1. Redistributions of source code must retain the above copyright
!!$ notice, this list of conditions and the following disclaimer.
!!$ 2. Redistributions in binary form must reproduce the above copyright
!!$ notice, this list of conditions, and the following disclaimer in the
!!$ documentation and/or other materials provided with the distribution.
!!$ 3. The name of the MLD2P4 group or the names of its contributors may
!!$ not be used to endorse or promote products derived from this
!!$ software without specific written permission.
!!$
!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE MLD2P4 GROUP OR ITS CONTRIBUTORS
!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
!!$ POSSIBILITY OF SUCH DAMAGE.
!!$
!!$
! File: mld_zprecbld.f90
!
! Subroutine: mld_zprecbld
! Version: complex
! Contains: subroutine init_baseprec_av
!
! This routine builds the preconditioner according to the requirements made by
! the user through the subroutines mld_precinit and mld_precset.
!
!
! Arguments:
! a - type(psb_zspmat_type).
! The sparse matrix structure containing the local part of the
! matrix to be preconditioned.
! desc_a - type(psb_desc_type), input.
! The communication descriptor of a.
! p - type(mld_zprec_type), input/output.
! The preconditioner data structure containing the local part
! of the preconditioner to be built.
! info - integer, output.
! Error code.
!
subroutine mld_zprecbld(a,desc_a,p,info,amold,vmold,imold)
use psb_base_mod
use mld_z_inner_mod
use mld_z_prec_mod, mld_protect_name => mld_zprecbld
Implicit None
! Arguments
type(psb_zspmat_type),intent(in), target :: a
type(psb_desc_type), intent(inout), target :: desc_a
type(mld_zprec_type),intent(inout), target :: p
integer(psb_ipk_), intent(out) :: info
class(psb_z_base_sparse_mat), intent(in), optional :: amold
class(psb_z_base_vect_type), intent(in), optional :: vmold
class(psb_i_base_vect_type), intent(in), optional :: imold
!!$ character, intent(in), optional :: upd
! Local Variables
type(mld_zprec_type) :: t_prec
integer(psb_ipk_) :: ictxt, me,np
integer(psb_ipk_) :: err,i,k,err_act, iszv, newsz
integer(psb_ipk_) :: ipv(mld_ifpsz_), val
integer(psb_ipk_) :: int_err(5)
character :: upd_
type(mld_dml_parms) :: prm
integer(psb_ipk_) :: debug_level, debug_unit
character(len=20) :: name, ch_err
if (psb_get_errstatus().ne.0) return
info=psb_success_
err=0
call psb_erractionsave(err_act)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
name = 'mld_zprecbld'
info = psb_success_
int_err(1) = 0
ictxt = desc_a%get_context()
call psb_info(ictxt, me, np)
p%ictxt = ictxt
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& 'Entering '
!
! For the time being we are commenting out the UPDATE argument
! we plan to resurrect it later.
!!$ if (present(upd)) then
!!$ if (debug_level >= psb_debug_outer_) &
!!$ & write(debug_unit,*) me,' ',trim(name),'UPD ', upd
!!$
!!$ if ((psb_toupper(upd).eq.'F').or.(psb_toupper(upd).eq.'T')) then
!!$ upd_=psb_toupper(upd)
!!$ else
!!$ upd_='F'
!!$ endif
!!$ else
!!$ upd_='F'
!!$ endif
upd_ = 'F'
if (.not.allocated(p%precv)) then
!! Error: should have called mld_zprecinit
info=3111
call psb_errpush(info,name)
goto 9999
end if
!
! Check to ensure all procs have the same
!
newsz = -1
iszv = size(p%precv)
call psb_bcast(ictxt,iszv)
if (iszv /= size(p%precv)) then
info=psb_err_internal_error_
call psb_errpush(info,name,a_err='Inconsistent size of precv')
goto 9999
end if
if (iszv <= 0) then
! Is this really possible? probably not.
info=psb_err_from_subroutine_
ch_err='size bpv'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
!
! Number of levels = 1
!
if (iszv == 1) then
!
! Check on the iprcparm contents: they should be the same
! on all processes.
!
call psb_bcast(ictxt,p%precv(1)%parms)
p%precv(1)%base_a => a
p%precv(1)%base_desc => desc_a
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,a_err='Base level precbuild.')
goto 9999
end if
call p%precv(1)%check(info)
if (info /= psb_success_) then
write(0,*) ' Smoother check error',info
call psb_errpush(psb_err_internal_error_,name,&
& a_err='One level preconditioner check.')
goto 9999
endif
call p%precv(1)%sm%build(a,desc_a,upd_,info,&
& amold=amold,vmold=vmold,imold=imold)
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='One level preconditioner build.')
goto 9999
endif
!
! Number of levels > 1
!
else if (iszv > 1) then
!
! Build the multilevel preconditioner
!
call mld_mlprec_bld(a,desc_a,p,info,&
& amold=amold,vmold=vmold,imold=imold)
if (info /= psb_success_) then
call psb_errpush(psb_err_internal_error_,name,&
& a_err='Multilevel preconditioner build.')
goto 9999
endif
end if
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine mld_zprecbld