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114 lines
4.2 KiB
Fortran
114 lines
4.2 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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subroutine mld_z_diag_solver_bld(a,desc_a,sv,info,b,amold,vmold,imold)
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use psb_base_mod
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use mld_z_diag_solver, mld_protect_name => mld_z_diag_solver_bld
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Implicit None
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! Arguments
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type(psb_zspmat_type), intent(in), target :: a
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Type(psb_desc_type), Intent(in) :: desc_a
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class(mld_z_diag_solver_type), intent(inout) :: sv
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integer(psb_ipk_), intent(out) :: info
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type(psb_zspmat_type), intent(in), target, optional :: b
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class(psb_z_base_sparse_mat), intent(in), optional :: amold
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class(psb_z_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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integer(psb_ipk_) :: n_row,n_col, nrow_a, nztota
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complex(psb_dpk_), pointer :: ww(:), aux(:), tx(:),ty(:)
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complex(psb_dpk_), allocatable :: tdb(:)
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integer(psb_ipk_) :: ictxt,np,me,i, err_act, debug_unit, debug_level
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character(len=20) :: name='z_diag_solver_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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ictxt = desc_a%get_context()
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call psb_info(ictxt, 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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n_row = desc_a%get_local_rows()
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nrow_a = a%get_nrows()
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sv%d = a%get_diag(info)
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if (info == psb_success_) call psb_realloc(n_row,sv%d,info)
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if (present(b)) then
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tdb=b%get_diag(info)
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if (size(tdb)+nrow_a > n_row) call psb_realloc(nrow_a+size(tdb),sv%d,info)
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if (info == psb_success_) sv%d(nrow_a+1:nrow_a+size(tdb)) = tdb(:)
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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='get_diag')
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goto 9999
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end if
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do i=1,n_row
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if (sv%d(i) == zzero) then
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sv%d(i) = zone
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else
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sv%d(i) = zone/sv%d(i)
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end if
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end do
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allocate(sv%dv,stat=info)
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if (info == psb_success_) then
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call sv%dv%bld(sv%d)
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if (present(vmold)) call sv%dv%cnv(vmold)
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call sv%dv%sync()
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else
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call psb_errpush(psb_err_from_subroutine_,name,&
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& a_err='Allocate sv%dv')
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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),' 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 mld_z_diag_solver_bld
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