! ! Parallel Sparse BLAS version 3.5 ! (C) Copyright 2006-2018 ! Salvatore Filippone ! Alfredo Buttari ! ! 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 PSBLAS 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 PSBLAS 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. ! ! Moved here from AMG-AINV, original copyright below. ! ! ! AMG-AINV: Approximate Inverse plugin for ! AMG4PSBLAS version 1.0 ! ! (C) Copyright 2020 ! ! Salvatore Filippone University of Rome Tor Vergata ! ! 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 psb_z_ainv_bld(a,alg,fillin,thresh,wmat,d,zmat,desc,info,blck,iscale) use psb_base_mod use psb_prec_const_mod use psb_z_biconjg_mod implicit none ! Arguments type(psb_zspmat_type), intent(in), target :: a integer(psb_ipk_), intent(in) :: fillin,alg real(psb_dpk_), intent(in) :: thresh type(psb_zspmat_type), intent(inout) :: wmat, zmat complex(psb_dpk_), allocatable :: d(:) Type(psb_desc_type), Intent(in) :: desc integer(psb_ipk_), intent(out) :: info type(psb_zspmat_type), intent(in), optional :: blck integer(psb_ipk_), intent(in), optional :: iscale ! integer(psb_ipk_) :: i, nztota, err_act, n_row, nrow_a type(psb_z_coo_sparse_mat) :: acoo type(psb_z_csr_sparse_mat) :: acsr type(psb_zspmat_type) :: atmp real(psb_dpk_), allocatable :: arws(:), acls(:) complex(psb_dpk_), allocatable :: pq(:), ad(:) integer(psb_ipk_) :: debug_level, debug_unit integer(psb_ipk_) :: ictxt,np,me integer(psb_ipk_) :: nzrmax, iscale_ real(psb_dpk_) :: sp_thresh complex(psb_dpk_) :: weight character(len=20) :: name, ch_err info = psb_success_ name = 'psb_zainv_bld' call psb_erractionsave(err_act) if (psb_errstatus_fatal()) then info = psb_err_internal_error_; goto 9999 end if debug_unit = psb_get_debug_unit() debug_level = psb_get_debug_level() ictxt = psb_cd_get_context(desc) call psb_info(ictxt, me, np) if (debug_level >= psb_debug_outer_) & & write(debug_unit,*) me,' ',trim(name),' start' iscale_ = psb_ilu_scale_none_ if (present(iscale)) iscale_ = iscale weight = zone ! ! Check the memory available to hold the W and Z factors ! and allocate it if needed ! nrow_a = a%get_nrows() nztota = a%get_nzeros() if (present(blck)) then nztota = nztota + blck%get_nzeros() end if if (debug_level >= psb_debug_outer_) & & write(debug_unit,*) me,' ',trim(name),& & ': out get_nnzeros',nrow_a,nztota,& & a%get_nrows(),a%get_ncols(),a%get_nzeros() n_row = desc%get_local_rows() allocate(pq(n_row),stat=info) if (info /= psb_success_) then call psb_errpush(psb_err_from_subroutine_,name,a_err='Allocate') goto 9999 end if nzrmax = fillin sp_thresh = thresh ! ! Ok, let's start first with Z (i.e. Upper) ! call a%csclip(acoo,info,imax=n_row,jmax=n_row) call acsr%mv_from_coo(acoo,info) select case(iscale_) case(psb_ilu_scale_none_) ! Ok, do nothing. case(psb_ilu_scale_maxval_) weight = acsr%maxval() weight = zone/weight call acsr%scal(weight,info) case(psb_ilu_scale_arcsum_) allocate(arws(n_row),acls(n_row),ad(n_row),stat=info) if (info /= psb_success_) then call psb_errpush(psb_err_from_subroutine_,name,a_err='Allocate') goto 9999 end if call acsr%arwsum(arws) call acsr%aclsum(acls) ad(1:n_row) = sqrt(sqrt(arws(1:n_row)*acls(1:n_row))) ad(1:n_row) = zone/ad(1:n_row) call acsr%scal(ad,info,side='L') call acsr%scal(ad,info,side='R') case default call psb_errpush(psb_err_from_subroutine_,name,a_err='wrong iscale') goto 9999 end select ! ! Here for the actual workhorses. ! Only biconjg is surviving for now.... ! call psb_sparse_biconjg(alg,n_row,acsr,pq,& & zmat,wmat,nzrmax,sp_thresh,info) ! Done. Hopefully.... if (info /= psb_success_) then info = psb_err_internal_error_ call psb_errpush(info,name,a_err='sparse_biconjg') goto 9999 end if call atmp%mv_from(acsr) ! ! Is this right??? ! do i=1, n_row if (abs(pq(i)) < d_epstol) then pq(i) = zone else pq(i) = zone/pq(i) end if end do select case(iscale_) case(psb_ilu_scale_none_) ! Ok, do nothing. case(psb_ilu_scale_maxval_) pq(:) = pq(:)*weight case(psb_ilu_scale_arcsum_) call zmat%scal(ad,info,side='L') call wmat%scal(ad,info,side='R') case default call psb_errpush(psb_err_from_subroutine_,name,a_err='wrong iscale') goto 9999 end select call psb_move_alloc(pq,d,info) 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 psb_z_ainv_bld