! ! ! AMG4PSBLAS version 1.0 ! Algebraic Multigrid Package ! based on PSBLAS (Parallel Sparse BLAS version 3.5) ! ! (C) Copyright 2020 ! ! 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_apply_vect(alpha,sv,x,beta,y,desc_data,& & trans,work,wv,info,init,initu) use psb_base_mod use amg_d_ilu_solver, amg_protect_name => amg_d_ilu_solver_apply_vect implicit none type(psb_desc_type), intent(in) :: desc_data class(amg_d_ilu_solver_type), intent(inout) :: sv type(psb_d_vect_type),intent(inout) :: x type(psb_d_vect_type),intent(inout) :: y real(psb_dpk_),intent(in) :: alpha,beta character(len=1),intent(in) :: trans real(psb_dpk_),target, intent(inout) :: work(:) type(psb_d_vect_type),intent(inout) :: wv(:) integer(psb_ipk_), intent(out) :: info character, intent(in), optional :: init type(psb_d_vect_type),intent(inout), optional :: initu integer(psb_ipk_) :: n_row,n_col type(psb_d_vect_type) :: tw, tw1 real(psb_dpk_), pointer :: ww(:), aux(:), tx(:),ty(:) integer(psb_ipk_) :: i, err_act character :: trans_ character(len=20) :: name='d_ilu_solver_apply' call psb_erractionsave(err_act) info = psb_success_ trans_ = psb_toupper(trans) select case(trans_) case('N') case('T') case('C') case default call psb_errpush(psb_err_iarg_invalid_i_,name) goto 9999 end select ! ! For non-iterative solvers, init and initu are ignored. ! n_row = desc_data%get_local_rows() n_col = desc_data%get_local_cols() if (x%get_nrows() < n_row) then info = 36 call psb_errpush(info,name,& & i_err=(/itwo,n_row,izero,izero,izero/)) goto 9999 end if if (y%get_nrows() < n_row) then info = 36 call psb_errpush(info,name,& & i_err=(/ithree,n_row,izero,izero,izero/)) goto 9999 end if if (.not.allocated(sv%dv%v)) then info = 1124 call psb_errpush(info,name,a_err="preconditioner: D") goto 9999 end if if (sv%dv%get_nrows() < n_row) then info = 1124 call psb_errpush(info,name,a_err="preconditioner: DV") goto 9999 end if if (n_col <= size(work)) then ww => work(1:n_col) if ((4*n_col+n_col) <= size(work)) then aux => work(n_col+1:) else allocate(aux(4*n_col),stat=info) endif else allocate(ww(n_col),aux(4*n_col),stat=info) endif if (info /= psb_success_) then info=psb_err_alloc_request_ call psb_errpush(info,name,& & i_err=(/5*n_col,izero,izero,izero,izero/),& & a_err='real(psb_dpk_)') goto 9999 end if if (size(wv) < 2) then info = psb_err_internal_error_ call psb_errpush(info,name,& & a_err='invalid wv size') goto 9999 end if associate(tw => wv(1), tw1 => wv(2)) select case(trans_) case('N') call psb_spsm(done,sv%l,x,dzero,tw,desc_data,info,& & trans=trans_,scale='L',diag=sv%dv,choice=psb_none_,work=aux) if (info == psb_success_) call psb_spsm(alpha,sv%u,tw,beta,y,desc_data,info,& & trans=trans_,scale='U',choice=psb_none_, work=aux) case('T') call psb_spsm(done,sv%u,x,dzero,tw,desc_data,info,& & trans=trans_,scale='L',diag=sv%dv,choice=psb_none_,work=aux) if (info == psb_success_) call psb_spsm(alpha,sv%l,tw,beta,y,desc_data,info,& & trans=trans_,scale='U',choice=psb_none_,work=aux) case('C') call psb_spsm(done,sv%u,x,dzero,tw,desc_data,info,& & trans=trans_,scale='U',choice=psb_none_,work=aux) call tw1%mlt(done,sv%dv,tw,dzero,info,conjgx=trans_) if (info == psb_success_) call psb_spsm(alpha,sv%l,tw1,beta,y,desc_data,info,& & trans=trans_,scale='U',choice=psb_none_,work=aux) case default call psb_errpush(psb_err_internal_error_,name,& & a_err='Invalid TRANS in ILU subsolve') goto 9999 end select if (info /= psb_success_) then call psb_errpush(psb_err_internal_error_,name,& & a_err='Error in subsolve') goto 9999 endif end associate if (n_col <= size(work)) then if ((4*n_col+n_col) <= size(work)) then else deallocate(aux) endif else deallocate(ww,aux) endif call psb_erractionrestore(err_act) return 9999 call psb_error_handler(err_act) return end subroutine amg_d_ilu_solver_apply_vect