! ! ! AMG4PSBLAS version 1.0 ! Algebraic Multigrid Package ! based on PSBLAS (Parallel Sparse BLAS version 3.7) ! ! (C) Copyright 2021 ! ! Salvatore Filippone ! Pasqua D'Ambra ! Fabio Durastante ! ! 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 AMG4PSBLAS 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 AMG4PSBLAS 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 amg_d_ilu_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold) use psb_base_mod use amg_d_ilu_solver, amg_protect_name => amg_d_ilu_solver_bld Implicit None ! Arguments type(psb_dspmat_type), intent(inout), target :: a Type(psb_desc_type), Intent(inout) :: desc_a class(amg_d_ilu_solver_type), intent(inout) :: sv integer(psb_ipk_), intent(out) :: info type(psb_dspmat_type), intent(in), target, optional :: b class(psb_d_base_sparse_mat), intent(in), optional :: amold class(psb_d_base_vect_type), intent(in), optional :: vmold class(psb_i_base_vect_type), intent(in), optional :: imold ! Local variables integer(psb_ipk_) :: n_row,n_col, nrow_a, nztota, psb_fctype !!$ real(psb_dpk_), pointer :: ww(:), aux(:), tx(:),ty(:) type(psb_ctxt_type) :: ctxt integer(psb_ipk_) :: np, me, i, err_act, debug_unit, debug_level character(len=20) :: name='d_ilu_solver_bld', ch_err info=psb_success_ call psb_erractionsave(err_act) debug_unit = psb_get_debug_unit() debug_level = psb_get_debug_level() ctxt = desc_a%get_context() call psb_info(ctxt, me, np) if (debug_level >= psb_debug_outer_) & & write(debug_unit,*) me,' ',trim(name),' start' n_row = desc_a%get_local_rows() nrow_a = a%get_nrows() nztota = a%get_nzeros() if (present(b)) then nztota = nztota + b%get_nzeros() end if call sv%l%csall(n_row,n_row,info,nztota) if (info == psb_success_) call sv%u%csall(n_row,n_row,info,nztota) if(info /= psb_success_) then info=psb_err_from_subroutine_ ch_err='psb_sp_all' call psb_errpush(info,name,a_err=ch_err) goto 9999 end if if (allocated(sv%d)) then if (size(sv%d) < n_row) then deallocate(sv%d) endif endif if (.not.allocated(sv%d)) allocate(sv%d(n_row),stat=info) if (info /= psb_success_) then call psb_errpush(psb_err_from_subroutine_,name,a_err='Allocate') goto 9999 endif select case(sv%fact_type) case (amg_ilu_n_) psb_fctype = psb_ilu_n_ case (amg_milu_n_) psb_fctype = psb_milu_n_ case (amg_ilu_t_) psb_fctype = psb_ilu_t_ case default ! If we end up here, something was wrong up in the call chain. info = psb_err_input_value_invalid_i_ call psb_errpush(psb_err_input_value_invalid_i_,name,& & i_err=(/ithree,sv%fact_type,izero,izero,izero/)) goto 9999 end select select case(sv%fact_type) case (amg_ilu_t_) ! ! ILU(k,t) ! select case(sv%fill_in) case(:-1) ! Error: fill-in <= -1 call psb_errpush(psb_err_input_value_invalid_i_,& & name,i_err=(/ithree,sv%fill_in,izero,izero,izero/)) goto 9999 case(0:) ! Fill-in >= 0 call psb_ilut_fact(sv%fill_in,sv%thresh,& & a, sv%l,sv%u,sv%d,info,blck=b) end select if(info /= psb_success_) then info=psb_err_from_subroutine_ ch_err='psb_ilut_fact' call psb_errpush(info,name,a_err=ch_err) goto 9999 end if case(amg_ilu_n_,amg_milu_n_) ! ! ILU(k) and MILU(k) ! select case(sv%fill_in) case(:-1) ! Error: fill-in <= -1 call psb_errpush(psb_err_input_value_invalid_i_,& & name,i_err=(/ithree,sv%fill_in,izero,izero,izero/)) goto 9999 case(0) ! Fill-in 0 ! Separate implementation of ILU(0) for better performance. ! There seems to be a problem with the separate implementation of MILU(0), ! contained into psb_ilu0_fact. This must be investigated. For the time being, ! resort to the implementation of MILU(k) with k=0. if (sv%fact_type == amg_ilu_n_) then call psb_ilu0_fact(psb_fctype,a,sv%l,sv%u,& & sv%d,info,blck=b) else call psb_iluk_fact(sv%fill_in,psb_fctype,& & a,sv%l,sv%u,sv%d,info,blck=b) endif case(1:) ! Fill-in >= 1 ! The same routine implements both ILU(k) and MILU(k) call psb_iluk_fact(sv%fill_in,psb_fctype,& & a,sv%l,sv%u,sv%d,info,blck=b) end select if (info /= psb_success_) then info=psb_err_from_subroutine_ ch_err='psb_iluk_fact' call psb_errpush(info,name,a_err=ch_err) goto 9999 end if case default ! If we end up here, something was wrong up in the call chain. info = psb_err_input_value_invalid_i_ call psb_errpush(psb_err_input_value_invalid_i_,name,& & i_err=(/ithree,sv%fact_type,izero,izero,izero/)) goto 9999 end select call sv%l%set_asb() call sv%l%trim() call sv%u%set_asb() call sv%u%trim() call sv%dv%bld(sv%d,mold=vmold) if (present(amold)) then call sv%l%cscnv(info,mold=amold) call sv%u%cscnv(info,mold=amold) end if if (debug_level >= psb_debug_outer_) & & write(debug_unit,*) me,' ',trim(name),' end' call psb_erractionrestore(err_act) return 9999 call psb_error_handler(err_act) return end subroutine amg_d_ilu_solver_bld