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amg4psblas/mld_dprecbld.f90

176 lines
5.2 KiB
Fortran

!!$
!!$
!!$ MD2P4
!!$ Multilevel Domain Decomposition Parallel Preconditioner Package for PSBLAS
!!$ for
!!$ Parallel Sparse BLAS v2.0
!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari University of Rome Tor Vergata
!!$ Daniela di Serafino Second University of Naples
!!$ Pasqua D'Ambra ICAR-CNR
!!$
!!$ 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 MD2P4 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 MD2P4 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.
!!$
!!$
subroutine mld_dprecbld(a,desc_a,p,info,upd)
use psb_base_mod
use mld_prec_mod, protect => mld_dprecbld
Implicit None
type(psb_dspmat_type), target :: a
type(psb_desc_type), intent(in), target :: desc_a
type(mld_dprec_type),intent(inout) :: p
integer, intent(out) :: info
character, intent(in), optional :: upd
! Local scalars
Integer :: err,i,j,k,ictxt, me,np,lw, err_act
integer :: int_err(5)
character :: iupd
logical, parameter :: debug=.false., dump_aggr=.false.
integer,parameter :: iroot=0,iout=60,ilout=40
character(len=20) :: name, ch_err
if(psb_get_errstatus().ne.0) return
info=0
err=0
call psb_erractionsave(err_act)
name = 'mld_dprecbld'
if (debug) write(0,*) 'Entering precbld',P%prec,desc_a%matrix_data(:)
info = 0
int_err(1) = 0
ictxt = psb_cd_get_context(desc_a)
if (debug) write(0,*) 'Preconditioner psb_info'
call psb_info(ictxt, me, np)
if (present(upd)) then
if (debug) write(0,*) 'UPD ', upd
if ((upd.eq.'F').or.(upd.eq.'T')) then
iupd=upd
else
iupd='F'
endif
else
iupd='F'
endif
if (.not.allocated(p%baseprecv)) then
!! Error 1: should call precset
info=4010
ch_err='unallocated bpv'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
!
! Should add check to ensure all procs have the same...
!
! ALso should define symbolic names for the preconditioners.
!
if (size(p%baseprecv) >= 1) then
call init_baseprc_av(p%baseprecv(1),info)
if (info /= 0) then
info=4010
ch_err='allocate'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
endif
call mld_baseprc_bld(a,desc_a,p%baseprecv(1),info,iupd)
else
info=4010
ch_err='size bpv'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
endif
if (size(p%baseprecv) > 1) then
do i=2, size(p%baseprecv)
call init_baseprc_av(p%baseprecv(i),info)
if (info /= 0) then
info=4010
ch_err='allocate'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
endif
call mld_mlprec_bld(p%baseprecv(i-1)%base_a,p%baseprecv(i-1)%base_desc,&
& p%baseprecv(i),info)
if (dump_aggr) then
call psb_csprt(90+me,p%baseprecv(i)%base_a,head='% Smoothed aggregate.')
end if
if (info /= 0) then
info=4010
call psb_errpush(info,name)
goto 9999
endif
if (debug) then
write(0,*) 'Return from ',i-1,' call to mlprcbld ',info
endif
end do
endif
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
return
contains
subroutine init_baseprc_av(p,info)
type(mld_dbaseprc_type), intent(inout) :: p
integer :: info
if (allocated(p%av)) then
! Have not decided what to do yet
end if
allocate(p%av(max_avsz),stat=info)
!!$ if (info /= 0) return
do k=1,size(p%av)
call psb_nullify_sp(p%av(k))
end do
end subroutine init_baseprc_av
end subroutine mld_dprecbld