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amg4psblas/mlprec/mld_s_id_solver.f90

268 lines
7.8 KiB
Fortran

!!$
!!$
!!$ MLD2P4 version 2.0
!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
!!$ based on PSBLAS (Parallel Sparse BLAS version 3.0)
!!$
!!$ (C) Copyright 2008,2009,2010, 2010
!!$
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
!!$ Pasqua D'Ambra ICAR-CNR, Naples
!!$ Daniela di Serafino Second University of Naples
!!$
!!$ 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.
!!$
!!$
!
!
!
! Identity solver. Reference for nullprec.
!
!
module mld_s_id_solver
use mld_s_prec_type
type, extends(mld_s_base_solver_type) :: mld_s_id_solver_type
contains
procedure, pass(sv) :: build => s_id_solver_bld
procedure, pass(sv) :: apply => s_id_solver_apply
procedure, pass(sv) :: free => s_id_solver_free
procedure, pass(sv) :: seti => s_id_solver_seti
procedure, pass(sv) :: setc => s_id_solver_setc
procedure, pass(sv) :: setr => s_id_solver_setr
procedure, pass(sv) :: descr => s_id_solver_descr
end type mld_s_id_solver_type
private :: s_id_solver_bld, s_id_solver_apply, &
& s_id_solver_free, s_id_solver_seti, &
& s_id_solver_setc, s_id_solver_setr,&
& s_id_solver_descr
contains
subroutine s_id_solver_apply(alpha,sv,x,beta,y,desc_data,trans,work,info)
use psb_base_mod
type(psb_desc_type), intent(in) :: desc_data
class(mld_s_id_solver_type), intent(in) :: sv
real(psb_spk_),intent(inout) :: x(:)
real(psb_spk_),intent(inout) :: y(:)
real(psb_spk_),intent(in) :: alpha,beta
character(len=1),intent(in) :: trans
real(psb_spk_),target, intent(inout) :: work(:)
integer, intent(out) :: info
integer :: n_row,n_col
real(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
integer :: ictxt,np,me,i, err_act
character :: trans_
character(len=20) :: name='s_id_solver_apply'
call psb_erractionsave(err_act)
info = psb_success_
trans_ = psb_toupper(trans)
select case(trans_)
case('N')
case('T','C')
case default
call psb_errpush(psb_err_iarg_invalid_i_,name)
goto 9999
end select
call psb_geaxpby(alpha,x,beta,y,desc_data,info)
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine s_id_solver_apply
subroutine s_id_solver_bld(a,desc_a,sv,upd,info,b)
use psb_base_mod
Implicit None
! Arguments
type(psb_sspmat_type), intent(in), target :: a
Type(psb_desc_type), Intent(in) :: desc_a
class(mld_s_id_solver_type), intent(inout) :: sv
character, intent(in) :: upd
integer, intent(out) :: info
type(psb_sspmat_type), intent(in), target, optional :: b
! Local variables
integer :: n_row,n_col, nrow_a, nztota
real(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
integer :: ictxt,np,me,i, err_act, debug_unit, debug_level
character(len=20) :: name='s_id_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'
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),' end'
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act == psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine s_id_solver_bld
subroutine s_id_solver_seti(sv,what,val,info)
use psb_base_mod
Implicit None
! Arguments
class(mld_s_id_solver_type), intent(inout) :: sv
integer, intent(in) :: what
integer, intent(in) :: val
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='s_id_solver_seti'
info = psb_success_
return
end subroutine s_id_solver_seti
subroutine s_id_solver_setc(sv,what,val,info)
use psb_base_mod
Implicit None
! Arguments
class(mld_s_id_solver_type), intent(inout) :: sv
integer, intent(in) :: what
character(len=*), intent(in) :: val
integer, intent(out) :: info
Integer :: err_act, ival
character(len=20) :: name='s_id_solver_setc'
info = psb_success_
return
end subroutine s_id_solver_setc
subroutine s_id_solver_setr(sv,what,val,info)
use psb_base_mod
Implicit None
! Arguments
class(mld_s_id_solver_type), intent(inout) :: sv
integer, intent(in) :: what
real(psb_spk_), intent(in) :: val
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='s_id_solver_setr'
info = psb_success_
return
end subroutine s_id_solver_setr
subroutine s_id_solver_free(sv,info)
use psb_base_mod
Implicit None
! Arguments
class(mld_s_id_solver_type), intent(inout) :: sv
integer, intent(out) :: info
Integer :: err_act
character(len=20) :: name='s_id_solver_free'
info = psb_success_
return
end subroutine s_id_solver_free
subroutine s_id_solver_descr(sv,info,iout,coarse)
use psb_base_mod
Implicit None
! Arguments
class(mld_s_id_solver_type), intent(in) :: sv
integer, intent(out) :: info
integer, intent(in), optional :: iout
logical, intent(in), optional :: coarse
! Local variables
integer :: err_act
integer :: ictxt, me, np
character(len=20), parameter :: name='mld_s_id_solver_descr'
integer :: iout_
info = psb_success_
if (present(iout)) then
iout_ = iout
else
iout_ = 6
endif
write(iout_,*) ' Identity local solver '
return
end subroutine s_id_solver_descr
end module mld_s_id_solver