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.
psblas3/base/comm/internals/psi_eovrl_upd_a.f90

175 lines
5.5 KiB
Fortran

!
! Parallel Sparse BLAS version 3.5
! (C) Copyright 2006-2018
! Salvatore Filippone
! Alfredo Buttari
!
! 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 PSBLAS 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 PSBLAS 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: psi_eovrl_update
! These subroutines update the overlap region of a vector; they are used
! for the transpose matrix-vector product when there is a nonempty overlap,
! or for the application of Additive Schwarz preconditioners.
!
!
subroutine psi_eovrl_updr1(x,desc_a,update,info)
use psi_mod, psi_protect_name => psi_eovrl_updr1
implicit none
integer(psb_epk_), intent(inout), target :: x(:)
type(psb_desc_type), intent(in) :: desc_a
integer(psb_ipk_), intent(in) :: update
integer(psb_ipk_), intent(out) :: info
! locals
type(psb_ctxt_type) :: ctxt
integer(psb_ipk_) :: np, me, err_act, i, idx, ndm
integer(psb_ipk_) :: ierr(5)
character(len=20) :: name, ch_err
name='psi_eovrl_updr1'
info = psb_success_
call psb_erractionsave(err_act)
if (psb_errstatus_fatal()) then
info = psb_err_internal_error_ ; goto 9999
end if
ctxt = desc_a%get_context()
call psb_info(ctxt, me, np)
if (np == -1) then
info = psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
! switch on update type
select case (update)
case(psb_square_root_)
do i=1,size(desc_a%ovrlap_elem,1)
idx = desc_a%ovrlap_elem(i,1)
ndm = desc_a%ovrlap_elem(i,2)
x(idx) = x(idx)/sqrt(real(ndm))
end do
case(psb_avg_)
do i=1,size(desc_a%ovrlap_elem,1)
idx = desc_a%ovrlap_elem(i,1)
ndm = desc_a%ovrlap_elem(i,2)
x(idx) = x(idx)/real(ndm)
end do
case(psb_setzero_)
do i=1,size(desc_a%ovrlap_elem,1)
idx = desc_a%ovrlap_elem(i,1)
if (me /= desc_a%ovrlap_elem(i,3))&
& x(idx) = ezero
end do
case(psb_sum_)
! do nothing
case default
! wrong value for choice argument
info = psb_err_iarg_invalid_value_
ierr(1) = 3; ierr(2)=update;
call psb_errpush(info,name,i_err=ierr)
goto 9999
end select
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ctxt,err_act)
return
end subroutine psi_eovrl_updr1
subroutine psi_eovrl_updr2(x,desc_a,update,info)
use psi_mod, psi_protect_name => psi_eovrl_updr2
implicit none
integer(psb_epk_), intent(inout), target :: x(:,:)
type(psb_desc_type), intent(in) :: desc_a
integer(psb_ipk_), intent(in) :: update
integer(psb_ipk_), intent(out) :: info
! locals
type(psb_ctxt_type) :: ctxt
integer(psb_ipk_) :: np, me, err_act, i, idx, ndm
integer(psb_ipk_) :: ierr(5)
character(len=20) :: name, ch_err
name='psi_eovrl_updr2'
info = psb_success_
call psb_erractionsave(err_act)
if (psb_errstatus_fatal()) then
info = psb_err_internal_error_ ; goto 9999
end if
ctxt = desc_a%get_context()
call psb_info(ctxt, me, np)
if (np == -1) then
info = psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
! switch on update type
select case (update)
case(psb_square_root_)
do i=1,size(desc_a%ovrlap_elem,1)
idx = desc_a%ovrlap_elem(i,1)
ndm = desc_a%ovrlap_elem(i,2)
x(idx,:) = x(idx,:)/sqrt(real(ndm))
end do
case(psb_avg_)
do i=1,size(desc_a%ovrlap_elem,1)
idx = desc_a%ovrlap_elem(i,1)
ndm = desc_a%ovrlap_elem(i,2)
x(idx,:) = x(idx,:)/real(ndm)
end do
case(psb_setzero_)
do i=1,size(desc_a%ovrlap_elem,1)
idx = desc_a%ovrlap_elem(i,1)
if (me /= desc_a%ovrlap_elem(i,3))&
& x(idx,:) = ezero
end do
case(psb_sum_)
! do nothing
case default
! wrong value for choice argument
info = psb_err_iarg_invalid_value_
ierr(1) = 3; ierr(2)=update;
call psb_errpush(info,name,i_err=ierr)
goto 9999
end select
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ctxt,err_act)
return
end subroutine psi_eovrl_updr2