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amg4psblas/mlprec/impl/smoother/mld_s_as_smoother_restr_v.f90

170 lines
5.1 KiB
Fortran

!!$
!!$
!!$ MLD2P4 version 2.0
!!$ MultiLevel Domain Decomposition Parallel Preconditioners Package
!!$ based on PSBLAS (Parallel Sparse BLAS version 3.3)
!!$
!!$ (C) Copyright 2008, 2010, 2012, 2015
!!$
!!$ 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.
!!$
!!$
subroutine mld_s_as_smoother_restr_v(sm,x,trans,work,info,data)
use psb_base_mod
use mld_s_as_smoother, mld_protect_nam => mld_s_as_smoother_restr_v
implicit none
class(mld_s_as_smoother_type), intent(inout) :: sm
type(psb_s_vect_type),intent(inout) :: x
character(len=1),intent(in) :: trans
real(psb_spk_),target, intent(inout) :: work(:)
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_), optional, intent(in) :: data
!Local
integer(psb_ipk_) :: ictxt,np,me, err_act,isz,int_err(5), data_
character :: trans_
character(len=20) :: name='s_as_smther_restr_v', ch_err
call psb_erractionsave(err_act)
info = psb_success_
ictxt = sm%desc_data%get_context()
call psb_info(ictxt,me,np)
trans_ = psb_toupper(trans)
select case(trans_)
case('N')
case('T')
case('C')
case default
info = psb_err_iarg_invalid_i_
call psb_errpush(info,name)
goto 9999
end select
if (present(data)) then
data_ = data
else
data_ = psb_comm_ext_
end if
if (.not.allocated(sm%sv)) then
info = 1121
call psb_errpush(info,name)
goto 9999
end if
select case(trans_)
case('N')
!
! Get the overlap entries x
!
if (sm%restr == psb_halo_) then
call psb_halo(x,sm%desc_data,info,work=work,data=data_)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='psb_halo'
goto 9999
end if
else if (sm%restr /= psb_none_) then
call psb_errpush(psb_err_internal_error_,name,&
&a_err='Invalid mld_sub_restr_')
goto 9999
end if
case('T','C')
!
! With transpose, we have to do it here
!
select case (sm%prol)
case(psb_none_)
!
! Do nothing
case(psb_sum_)
!
! The transpose of sum is halo
!
call psb_halo(x,sm%desc_data,info,work=work,data=data_)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='psb_halo'
goto 9999
end if
case(psb_avg_)
!
! Tricky one: first we have to scale the overlap entries,
! which we can do by assignind mode=0, i.e. no communication
! (hence only scaling), then we do the halo
!
call psb_ovrl(x,sm%desc_data,info,&
& update=psb_avg_,work=work,mode=izero)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='psb_ovrl'
goto 9999
end if
call psb_halo(x,sm%desc_data,info,work=work,data=data_)
if(info /= psb_success_) then
info=psb_err_from_subroutine_
ch_err='psb_halo'
goto 9999
end if
case default
call psb_errpush(psb_err_internal_error_,name,&
& a_err='Invalid mld_sub_prol_')
goto 9999
end select
case default
info=psb_err_iarg_invalid_i_
int_err(1)=6
ch_err(2:2)=trans
goto 9999
end select
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine mld_s_as_smoother_restr_v