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106 lines
4.3 KiB
Fortran
106 lines
4.3 KiB
Fortran
!
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!
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! MLD2P4 version 2.2
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! MultiLevel Domain Decomposition Parallel Preconditioners Package
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! based on PSBLAS (Parallel Sparse BLAS version 3.5)
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!
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! (C) Copyright 2008-2018
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!
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! Salvatore Filippone
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! Pasqua D'Ambra
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! Daniela di Serafino
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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 MLD2P4 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 MLD2P4 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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!
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!
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! Locally symmetrized (decoupled) aggregation algorithm.
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! This version differs from the basic decoupled aggregation algorithm
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! only because it works on (the pattern of) A+A^T instead of A.
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!
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!
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module mld_c_symdec_aggregator_mod
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use mld_c_dec_aggregator_mod
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!> \namespace mld_c_symdec_aggregator_mod \class mld_c_symdec_aggregator_type
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!! \extends mld_c_dec_aggregator_mod::mld_c_dec_aggregator_type
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!!
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!! This version differs from the basic decoupled aggregation algorithm
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!! only because it works on (the pattern of) A+A^T instead of A.
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!!
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!
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type, extends(mld_c_dec_aggregator_type) :: mld_c_symdec_aggregator_type
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contains
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procedure, pass(ag) :: bld_tprol => mld_c_symdec_aggregator_build_tprol
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procedure, pass(ag) :: descr => mld_c_symdec_aggregator_descr
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procedure, nopass :: fmt => mld_c_symdec_aggregator_fmt
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end type mld_c_symdec_aggregator_type
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interface
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subroutine mld_c_symdec_aggregator_build_tprol(ag,parms,ag_data,&
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& a,desc_a,ilaggr,nlaggr,op_prol,info)
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import :: mld_c_symdec_aggregator_type, psb_desc_type, psb_cspmat_type, psb_spk_, &
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& psb_ipk_, psb_lpk_, psb_lcspmat_type, mld_sml_parms, mld_saggr_data
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implicit none
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class(mld_c_symdec_aggregator_type), target, intent(inout) :: ag
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type(mld_sml_parms), intent(inout) :: parms
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type(mld_saggr_data), intent(in) :: ag_data
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type(psb_cspmat_type), intent(in) :: a
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type(psb_desc_type), intent(in) :: desc_a
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integer(psb_lpk_), allocatable, intent(out) :: ilaggr(:),nlaggr(:)
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type(psb_lcspmat_type), intent(out) :: op_prol
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integer(psb_ipk_), intent(out) :: info
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end subroutine mld_c_symdec_aggregator_build_tprol
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end interface
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contains
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function mld_c_symdec_aggregator_fmt() result(val)
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implicit none
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character(len=32) :: val
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val = "Symmetric Decoupled aggregation"
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end function mld_c_symdec_aggregator_fmt
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subroutine mld_c_symdec_aggregator_descr(ag,parms,iout,info)
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implicit none
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class(mld_c_symdec_aggregator_type), intent(in) :: ag
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type(mld_sml_parms), intent(in) :: parms
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integer(psb_ipk_), intent(in) :: iout
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integer(psb_ipk_), intent(out) :: info
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write(iout,*) 'Decoupled Aggregator locally-symmetrized'
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write(iout,*) 'Aggregator object type: ',ag%fmt()
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call parms%mldescr(iout,info)
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return
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end subroutine mld_c_symdec_aggregator_descr
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end module mld_c_symdec_aggregator_mod
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