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amg4psblas/mlprec/mld_dmlprec_bld.f90

160 lines
5.6 KiB
Fortran

18 years ago
!!$
!!$
!!$ 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_dmlprec_bld(a,desc_a,p,info)
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use psb_base_mod
use mld_prec_mod, mld_protect_name => mld_dmlprec_bld
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implicit none
type(psb_dspmat_type), intent(in), target :: a
type(psb_desc_type), intent(in), target :: desc_a
type(mld_dbaseprc_type), intent(inout),target :: p
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integer, intent(out) :: info
type(psb_desc_type) :: desc_ac
integer :: i, nrg, nzg, err_act,k
character(len=20) :: name, ch_err
logical, parameter :: debug=.false.
type(psb_dspmat_type) :: ac
integer :: ictxt, np, me
name='psb_dmlprec_bld'
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if (psb_get_errstatus().ne.0) return
info = 0
ictxt = psb_cd_get_context(desc_a)
call psb_info(ictxt,me,np)
call psb_erractionsave(err_act)
call psb_nullify_sp(ac)
if (.not.allocated(p%iprcparm)) then
info = 2222
call psb_errpush(info,name)
goto 9999
endif
call mld_check_def(p%iprcparm(mld_ml_type_),'Multilevel type',&
& mld_mult_ml_,is_legal_ml_type)
call mld_check_def(p%iprcparm(mld_aggr_alg_),'aggregation',&
& mld_dec_aggr_,is_legal_ml_aggr_kind)
call mld_check_def(p%iprcparm(mld_aggr_kind_),'Smoother kind',&
& mld_smooth_prol_,is_legal_ml_smth_kind)
call mld_check_def(p%iprcparm(mld_coarse_mat_),'Coarse matrix',&
& mld_distr_mat_,is_legal_ml_coarse_mat)
call mld_check_def(p%iprcparm(mld_smooth_pos_),'smooth_pos',&
& mld_pre_smooth_,is_legal_ml_smooth_pos)
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!!$ nullify(p%desc_data)
select case(p%iprcparm(mld_sub_solve_))
case(mld_ilu_n_)
call mld_check_def(p%iprcparm(mld_sub_fill_in_),'Level',0,is_legal_ml_lev)
case(mld_ilu_t_)
call mld_check_def(p%dprcparm(mld_fact_thrs_),'Eps',dzero,is_legal_fact_thrs)
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end select
call mld_check_def(p%dprcparm(mld_aggr_damp_),'omega',dzero,is_legal_omega)
call mld_check_def(p%iprcparm(mld_smooth_sweeps_),'Jacobi sweeps',&
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& 1,is_legal_jac_sweeps)
! Currently this is ignored by gen_aggrmap, but it could be
! changed in the future. Need to package nlaggr & mlia in a
! private data structure?
call mld_aggrmap_bld(p%iprcparm(mld_aggr_alg_),a,desc_a,p%nlaggr,p%mlia,info)
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if(info /= 0) then
info=4010
ch_err='psb_gen_aggrmap'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
if (debug) write(0,*) 'Out from genaggrmap',p%nlaggr
call psb_nullify_desc(desc_ac)
call mld_aggrmat_asb(a,desc_a,ac,desc_ac,p,info)
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if(info /= 0) then
info=4010
ch_err='psb_bld_aggrmat'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
if (debug) write(0,*) 'Out from bldaggrmat',desc_ac%matrix_data(:)
call mld_baseprc_bld(ac,desc_ac,p,info)
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if (debug) write(0,*) 'Out from baseprcbld',info
if(info /= 0) then
info=4010
ch_err='mld_baseprc_bld'
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call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
!
! We have used a separate ac because:
! 1. We want to reuse the same routines mld_ilu_bld etc.
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! 2. We do NOT want to pass an argument twice to them
! p%av(mld_ac_) and p, as this would violate the Fortran standard
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! Hence a separate AC and a TRANSFER function at the end.
!
call psb_sp_transfer(ac,p%av(mld_ac_),info)
p%base_a => p%av(mld_ac_)
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call psb_cdtransfer(desc_ac,p%desc_ac,info)
if (info /= 0) then
info=4010
ch_err='psb_cdtransfer'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
p%base_desc => p%desc_ac
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act.eq.psb_act_abort_) then
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call psb_error()
return
end if
Return
end subroutine mld_dmlprec_bld