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174 lines
5.5 KiB
Fortran
174 lines
5.5 KiB
Fortran
!
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! Parallel Sparse BLAS version 3.5
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! (C) Copyright 2006-2018
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! Salvatore Filippone
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! Alfredo Buttari
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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 PSBLAS 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 PSBLAS 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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! Subroutine: psi_i2ovrl_update
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! These subroutines update the overlap region of a vector; they are used
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! for the transpose matrix-vector product when there is a nonempty overlap,
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! or for the application of Additive Schwarz preconditioners.
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!
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!
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subroutine psi_i2ovrl_updr1(x,desc_a,update,info)
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use psi_mod, psi_protect_name => psi_i2ovrl_updr1
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implicit none
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integer(psb_i2pk_), intent(inout), target :: x(:)
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type(psb_desc_type), intent(in) :: desc_a
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integer(psb_ipk_), intent(in) :: update
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integer(psb_ipk_), intent(out) :: info
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! locals
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integer(psb_ipk_) :: ictxt, np, me, err_act, i, idx, ndm
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integer(psb_ipk_) :: ierr(5)
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character(len=20) :: name, ch_err
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name='psi_i2ovrl_updr1'
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info = psb_success_
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call psb_erractionsave(err_act)
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if (psb_errstatus_fatal()) then
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info = psb_err_internal_error_ ; goto 9999
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end if
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ictxt = desc_a%get_context()
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call psb_info(ictxt, me, np)
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if (np == -1) then
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info = psb_err_context_error_
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call psb_errpush(info,name)
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goto 9999
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endif
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! switch on update type
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select case (update)
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case(psb_square_root_)
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do i=1,size(desc_a%ovrlap_elem,1)
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idx = desc_a%ovrlap_elem(i,1)
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ndm = desc_a%ovrlap_elem(i,2)
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x(idx) = x(idx)/sqrt(real(ndm))
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end do
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case(psb_avg_)
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do i=1,size(desc_a%ovrlap_elem,1)
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idx = desc_a%ovrlap_elem(i,1)
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ndm = desc_a%ovrlap_elem(i,2)
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x(idx) = x(idx)/real(ndm)
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end do
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case(psb_setzero_)
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do i=1,size(desc_a%ovrlap_elem,1)
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idx = desc_a%ovrlap_elem(i,1)
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if (me /= desc_a%ovrlap_elem(i,3))&
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& x(idx) = i2zero
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end do
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case(psb_sum_)
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! do nothing
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case default
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! wrong value for choice argument
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info = psb_err_iarg_invalid_value_
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ierr(1) = 3; ierr(2)=update;
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call psb_errpush(info,name,i_err=ierr)
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goto 9999
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end select
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(ictxt,err_act)
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return
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end subroutine psi_i2ovrl_updr1
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subroutine psi_i2ovrl_updr2(x,desc_a,update,info)
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use psi_mod, psi_protect_name => psi_i2ovrl_updr2
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implicit none
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integer(psb_i2pk_), intent(inout), target :: x(:,:)
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type(psb_desc_type), intent(in) :: desc_a
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integer(psb_ipk_), intent(in) :: update
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integer(psb_ipk_), intent(out) :: info
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! locals
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integer(psb_ipk_) :: ictxt, np, me, err_act, i, idx, ndm
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integer(psb_ipk_) :: ierr(5)
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character(len=20) :: name, ch_err
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name='psi_i2ovrl_updr2'
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info = psb_success_
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call psb_erractionsave(err_act)
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if (psb_errstatus_fatal()) then
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info = psb_err_internal_error_ ; goto 9999
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end if
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ictxt = desc_a%get_context()
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call psb_info(ictxt, me, np)
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if (np == -1) then
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info = psb_err_context_error_
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call psb_errpush(info,name)
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goto 9999
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endif
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! switch on update type
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select case (update)
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case(psb_square_root_)
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do i=1,size(desc_a%ovrlap_elem,1)
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idx = desc_a%ovrlap_elem(i,1)
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ndm = desc_a%ovrlap_elem(i,2)
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x(idx,:) = x(idx,:)/sqrt(real(ndm))
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end do
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case(psb_avg_)
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do i=1,size(desc_a%ovrlap_elem,1)
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idx = desc_a%ovrlap_elem(i,1)
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ndm = desc_a%ovrlap_elem(i,2)
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x(idx,:) = x(idx,:)/real(ndm)
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end do
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case(psb_setzero_)
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do i=1,size(desc_a%ovrlap_elem,1)
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idx = desc_a%ovrlap_elem(i,1)
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if (me /= desc_a%ovrlap_elem(i,3))&
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& x(idx,:) = i2zero
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end do
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case(psb_sum_)
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! do nothing
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case default
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! wrong value for choice argument
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info = psb_err_iarg_invalid_value_
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ierr(1) = 3; ierr(2)=update;
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call psb_errpush(info,name,i_err=ierr)
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goto 9999
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end select
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(ictxt,err_act)
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return
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end subroutine psi_i2ovrl_updr2
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