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468 lines
13 KiB
Fortran
468 lines
13 KiB
Fortran
!!$
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!!$
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!!$ MLD2P4 version 2.0
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!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
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!!$ based on PSBLAS (Parallel Sparse BLAS version 3.0)
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!!$
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!!$ (C) Copyright 2008,2009,2010, 2010
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!!$
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!!$ Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari CNRS-IRIT, Toulouse
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!!$ Pasqua D'Ambra ICAR-CNR, Naples
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!!$ Daniela di Serafino Second University of Naples
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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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!
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!
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!
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!
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module mld_s_diag_solver
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use mld_s_prec_type
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type, extends(mld_s_base_solver_type) :: mld_s_diag_solver_type
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real(psb_spk_), allocatable :: d(:)
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contains
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procedure, pass(sv) :: build => s_diag_solver_bld
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procedure, pass(sv) :: apply => s_diag_solver_apply
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procedure, pass(sv) :: free => s_diag_solver_free
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procedure, pass(sv) :: seti => s_diag_solver_seti
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procedure, pass(sv) :: setc => s_diag_solver_setc
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procedure, pass(sv) :: setr => s_diag_solver_setr
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procedure, pass(sv) :: descr => s_diag_solver_descr
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procedure, pass(sv) :: sizeof => s_diag_solver_sizeof
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end type mld_s_diag_solver_type
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private :: s_diag_solver_bld, s_diag_solver_apply, &
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& s_diag_solver_free, s_diag_solver_seti, &
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& s_diag_solver_setc, s_diag_solver_setr,&
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& s_diag_solver_descr, s_diag_solver_sizeof
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contains
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subroutine s_diag_solver_apply(alpha,sv,x,beta,y,desc_data,trans,work,info)
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use psb_base_mod
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type(psb_desc_type), intent(in) :: desc_data
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class(mld_s_diag_solver_type), intent(in) :: sv
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real(psb_spk_),intent(inout) :: x(:)
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real(psb_spk_),intent(inout) :: y(:)
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real(psb_spk_),intent(in) :: alpha,beta
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character(len=1),intent(in) :: trans
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real(psb_spk_),target, intent(inout) :: work(:)
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integer, intent(out) :: info
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integer :: n_row,n_col
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real(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
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integer :: ictxt,np,me,i, err_act
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character :: trans_
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character(len=20) :: name='s_diag_solver_apply'
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call psb_erractionsave(err_act)
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info = psb_success_
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trans_ = psb_toupper(trans)
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select case(trans_)
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case('N')
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case('T','C')
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case default
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call psb_errpush(psb_err_iarg_invalid_i_,name)
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goto 9999
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end select
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n_row = desc_data%get_local_rows()
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n_col = desc_data%get_local_cols()
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if (beta == szero) then
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if (alpha == szero) then
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y(1:n_row) = szero
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else if (alpha == sone) then
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do i=1, n_row
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y(i) = sv%d(i) * x(i)
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end do
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else if (alpha == -sone) then
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do i=1, n_row
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y(i) = -sv%d(i) * x(i)
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end do
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else
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do i=1, n_row
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y(i) = alpha * sv%d(i) * x(i)
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end do
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end if
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else if (beta == sone) then
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if (alpha == szero) then
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!y(1:n_row) = szero
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else if (alpha == sone) then
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do i=1, n_row
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y(i) = sv%d(i) * x(i) + y(i)
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end do
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else if (alpha == -sone) then
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do i=1, n_row
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y(i) = -sv%d(i) * x(i) + y(i)
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end do
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else
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do i=1, n_row
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y(i) = alpha * sv%d(i) * x(i) + y(i)
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end do
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end if
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else if (beta == -sone) then
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if (alpha == szero) then
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y(1:n_row) = -y(1:n_row)
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else if (alpha == sone) then
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do i=1, n_row
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y(i) = sv%d(i) * x(i) - y(i)
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end do
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else if (alpha == -sone) then
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do i=1, n_row
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y(i) = -sv%d(i) * x(i) - y(i)
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end do
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else
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do i=1, n_row
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y(i) = alpha * sv%d(i) * x(i) - y(i)
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end do
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end if
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else
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if (alpha == szero) then
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y(1:n_row) = beta *y(1:n_row)
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else if (alpha == sone) then
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do i=1, n_row
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y(i) = sv%d(i) * x(i) + beta*y(i)
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end do
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else if (alpha == -sone) then
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do i=1, n_row
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y(i) = -sv%d(i) * x(i) + beta*y(i)
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end do
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else
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do i=1, n_row
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y(i) = alpha * sv%d(i) * x(i) + beta*y(i)
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end do
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end if
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end if
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_diag_solver_apply
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subroutine s_diag_solver_bld(a,desc_a,sv,upd,info,b)
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use psb_base_mod
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Implicit None
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! Arguments
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type(psb_sspmat_type), intent(in), target :: a
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Type(psb_desc_type), Intent(in) :: desc_a
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class(mld_s_diag_solver_type), intent(inout) :: sv
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character, intent(in) :: upd
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integer, intent(out) :: info
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type(psb_sspmat_type), intent(in), target, optional :: b
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! Local variables
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integer :: n_row,n_col, nrow_a, nztota
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real(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
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integer :: ictxt,np,me,i, err_act, debug_unit, debug_level
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character(len=20) :: name='s_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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if (allocated(sv%d)) then
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if (size(sv%d) < n_row) then
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deallocate(sv%d)
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endif
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endif
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if (.not.allocated(sv%d)) then
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allocate(sv%d(n_row),stat=info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='Allocate')
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goto 9999
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end if
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endif
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call a%get_diag(sv%d,info)
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if (present(b)) then
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if (info == psb_success_) call b%get_diag(sv%d(nrow_a+1:), info)
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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) == szero) then
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sv%d(i) = sone
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else
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sv%d(i) = sone/sv%d(i)
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end if
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end do
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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 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_diag_solver_bld
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subroutine s_diag_solver_seti(sv,what,val,info)
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use psb_base_mod
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Implicit None
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! Arguments
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class(mld_s_diag_solver_type), intent(inout) :: sv
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integer, intent(in) :: what
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integer, intent(in) :: val
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integer, intent(out) :: info
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Integer :: err_act
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character(len=20) :: name='s_diag_solver_seti'
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info = psb_success_
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!!$ call psb_erractionsave(err_act)
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!!$
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!!$ select case(what)
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!!$ case(mld_sub_solve_)
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!!$ sv%fact_type = val
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!!$ case(mld_sub_fillin_)
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!!$ sv%fill_in = val
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!!$ case default
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!!$ write(0,*) name,': Error: invalid WHAT'
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!!$ info = -2
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!!$ end select
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!!$
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!!$ call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_diag_solver_seti
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subroutine s_diag_solver_setc(sv,what,val,info)
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use psb_base_mod
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Implicit None
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! Arguments
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class(mld_s_diag_solver_type), intent(inout) :: sv
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integer, intent(in) :: what
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character(len=*), intent(in) :: val
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integer, intent(out) :: info
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Integer :: err_act, ival
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character(len=20) :: name='s_diag_solver_setc'
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info = psb_success_
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!!$ call psb_erractionsave(err_act)
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!!$
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!!$
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!!$ call mld_stringval(val,ival,info)
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!!$ if (info == psb_success_) call sv%set(what,ival,info)
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!!$ if (info /= psb_success_) then
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!!$ info = psb_err_from_subroutine_
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!!$ call psb_errpush(info, name)
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!!$ goto 9999
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!!$ end if
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!!$
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!!$ call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_diag_solver_setc
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subroutine s_diag_solver_setr(sv,what,val,info)
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use psb_base_mod
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Implicit None
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! Arguments
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class(mld_s_diag_solver_type), intent(inout) :: sv
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integer, intent(in) :: what
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real(psb_spk_), intent(in) :: val
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integer, intent(out) :: info
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Integer :: err_act
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character(len=20) :: name='s_diag_solver_setr'
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info = psb_success_
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!!$ call psb_erractionsave(err_act)
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!!$
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!!$ select case(what)
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!!$ case(mld_sub_iluthrs_)
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!!$ sv%thresh = val
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!!$ case default
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!!$ write(0,*) name,': Error: invalid WHAT'
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!!$ info = -2
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!!$ goto 9999
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!!$ end select
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!!$
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!!$ call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_diag_solver_setr
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subroutine s_diag_solver_free(sv,info)
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use psb_base_mod
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Implicit None
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! Arguments
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class(mld_s_diag_solver_type), intent(inout) :: sv
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integer, intent(out) :: info
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Integer :: err_act
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character(len=20) :: name='s_diag_solver_free'
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call psb_erractionsave(err_act)
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info = psb_success_
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if (allocated(sv%d)) then
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deallocate(sv%d,stat=info)
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if (info /= psb_success_) then
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info = psb_err_alloc_dealloc_
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call psb_errpush(info,name)
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goto 9999
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end if
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end if
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine s_diag_solver_free
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subroutine s_diag_solver_descr(sv,info,iout,coarse)
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use psb_base_mod
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Implicit None
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! Arguments
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class(mld_s_diag_solver_type), intent(in) :: sv
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integer, intent(out) :: info
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integer, intent(in), optional :: iout
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logical, intent(in), optional :: coarse
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! Local variables
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integer :: err_act
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integer :: ictxt, me, np
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character(len=20), parameter :: name='mld_s_diag_solver_descr'
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integer :: iout_
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info = psb_success_
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if (present(iout)) then
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iout_ = iout
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else
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iout_ = 6
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endif
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write(iout_,*) ' Diagonal local solver '
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return
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end subroutine s_diag_solver_descr
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function s_diag_solver_sizeof(sv) result(val)
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use psb_base_mod
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implicit none
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! Arguments
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class(mld_s_diag_solver_type), intent(in) :: sv
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integer(psb_long_int_k_) :: val
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integer :: i
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val = 0
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if (allocated(sv%d)) val = val + psb_sizeof_sp * size(sv%d)
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return
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end function s_diag_solver_sizeof
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end module mld_s_diag_solver
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