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185 lines
6.6 KiB
Fortran
185 lines
6.6 KiB
Fortran
!
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!
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! AMG4PSBLAS version 1.0
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! Algebraic Multigrid Package
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! based on PSBLAS (Parallel Sparse BLAS version 3.7)
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!
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! (C) Copyright 2021
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!
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! Salvatore Filippone
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! Pasqua D'Ambra
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! Fabio Durastante
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions
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! are met:
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! 1. Redistributions of source code must retain the above copyright
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! notice, this list of conditions and the following disclaimer.
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! 2. Redistributions in binary form must reproduce the above copyright
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! notice, this list of conditions, and the following disclaimer in the
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! documentation and/or other materials provided with the distribution.
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! 3. The name of the AMG4PSBLAS group or the names of its contributors may
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! not be used to endorse or promote products derived from this
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! software without specific written permission.
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!
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! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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! ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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! TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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! PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AMG4PSBLAS GROUP OR ITS CONTRIBUTORS
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! BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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! CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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! SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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! CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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! ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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! POSSIBILITY OF SUCH DAMAGE.
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!
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!
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subroutine amg_c_as_smoother_bld(a,desc_a,sm,info,amold,vmold,imold)
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use psb_base_mod
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use amg_c_as_smoother, amg_protect_nam => amg_c_as_smoother_bld
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Implicit None
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! Arguments
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type(psb_cspmat_type), intent(in), target :: a
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Type(psb_desc_type), Intent(inout) :: desc_a
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class(amg_c_as_smoother_type), intent(inout) :: sm
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integer(psb_ipk_), intent(out) :: info
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class(psb_c_base_sparse_mat), intent(in), optional :: amold
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class(psb_c_base_vect_type), intent(in), optional :: vmold
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class(psb_i_base_vect_type), intent(in), optional :: imold
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! Local variables
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type(psb_cspmat_type) :: blck, atmp
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integer(psb_ipk_) :: n_row,n_col, nrow_a, nhalo, novr, data_
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complex(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
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type(psb_ctxt_type) :: ctxt
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integer(psb_ipk_) :: np, me,i, err_act, debug_unit, debug_level
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character(len=20) :: name='c_as_smoother_bld', ch_err
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info=psb_success_
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call psb_erractionsave(err_act)
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debug_unit = psb_get_debug_unit()
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debug_level = psb_get_debug_level()
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ctxt = desc_a%get_context()
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call psb_info(ctxt, me, np)
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),' start'
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novr = sm%novr
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if (novr < 0) then
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info=psb_err_invalid_ovr_num_
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call psb_errpush(info,name,&
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& i_err=(/novr,izero,izero,izero,izero,izero/))
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goto 9999
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endif
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if ((novr == 0).or.(np == 1)) then
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call psb_cdcpy(desc_a,sm%desc_data,info)
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If(debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& ' done cdcpy'
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if(info /= psb_success_) then
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info=psb_err_from_subroutine_
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ch_err='psb_cdcpy'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& 'Early return: P>=3 N_OVR=0'
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call blck%csall(izero,izero,info,ione)
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else
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!
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! Build the auxiliary descriptor desc_p%matrix_data(psb_n_row_).
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! This is done by psb_cdbldext (interface to psb_cdovr), which is
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! independent of CSR, and has been placed in the tools directory
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! of PSBLAS, instead of the mlprec directory of AMG4PSBLAS, because it
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! might be used independently of the AS preconditioner, to build
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! a descriptor for an extended stencil in a PDE solver.
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!
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call psb_cdbldext(a,desc_a,novr,sm%desc_data,info,extype=psb_ovt_asov_)
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if(debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& ' From cdbldext _:',sm%desc_data%get_local_rows(),&
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& sm%desc_data%get_local_cols()
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if (info /= psb_success_) then
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info=psb_err_from_subroutine_
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ch_err='psb_cdbldext'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& 'Before sphalo '
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!
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! Retrieve the remote sparse matrix rows required for the AS extended
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! matrix
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data_ = psb_comm_ext_
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Call psb_sphalo(a,sm%desc_data,blck,info,data=data_,rowscale=.true.)
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if (info /= psb_success_) then
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info=psb_err_from_subroutine_
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ch_err='psb_sphalo'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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if (debug_level >=psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),&
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& 'After psb_sphalo ',&
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& blck%get_nrows(), blck%get_nzeros()
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End if
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if (info == psb_success_) &
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& call sm%sv%build(a,sm%desc_data,info,&
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& blck,amold=amold,vmold=vmold)
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nrow_a = a%get_nrows()
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n_row = sm%desc_data%get_local_rows()
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n_col = sm%desc_data%get_local_cols()
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if (info == psb_success_) call a%csclip(sm%nd,info,&
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& jmin=nrow_a+1,rscale=.false.,cscale=.false.)
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if (info == psb_success_) call blck%csclip(atmp,info,&
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& jmin=nrow_a+1,rscale=.false.,cscale=.false.)
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if (info == psb_success_) call psb_rwextd(n_row,sm%nd,info,b=atmp)
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if (info == psb_success_) then
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if (present(amold)) then
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call sm%nd%cscnv(info,&
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& mold=amold,dupl=psb_dupl_add_)
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else
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call sm%nd%cscnv(info,&
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& type='csr',dupl=psb_dupl_add_)
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end if
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end if
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if (info == psb_success_) then
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if (present(imold)) then
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call sm%desc_data%cnv(imold)
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end if
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end if
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='clip & psb_spcnv csr 4')
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goto 9999
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end if
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sm%nd_nnz_tot = sm%nd%get_nzeros()
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call psb_sum(ctxt,sm%nd_nnz_tot)
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),' end'
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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end subroutine amg_c_as_smoother_bld
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