You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
amg4psblas/mlprec/mld_c_symdec_aggregator_mod...

104 lines
4.2 KiB
Fortran

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