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/impl/solver/mld_z_diag_solver_bld.f90

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