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88 lines
3.3 KiB
Fortran
88 lines
3.3 KiB
Fortran
!
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!
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! AMG4PSBLAS version 1.0
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! Algebraic Multigrid Package
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! based on PSBLAS (Parallel Sparse BLAS version 3.7)
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!
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! (C) Copyright 2021
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!
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! Salvatore Filippone
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! Pasqua D'Ambra
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! Fabio Durastante
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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 AMG4PSBLAS 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 AMG4PSBLAS 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 amg_s_base_smoother_apply(alpha,sm,x,beta,y,desc_data,&
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& trans,sweeps,work,info,init,initu)
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use psb_base_mod
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use amg_s_base_smoother_mod, amg_protect_name => amg_s_base_smoother_apply
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implicit none
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type(psb_desc_type), intent(in) :: desc_data
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class(amg_s_base_smoother_type), intent(inout) :: sm
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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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integer(psb_ipk_), intent(in) :: sweeps
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real(psb_spk_),target, intent(inout) :: work(:)
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integer(psb_ipk_), intent(out) :: info
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character, intent(in), optional :: init
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real(psb_spk_),intent(inout), optional :: initu(:)
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integer(psb_ipk_) :: err_act
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character(len=20) :: name='s_base_smoother_apply'
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call psb_erractionsave(err_act)
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info = psb_success_
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if (sweeps == 0) then
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!
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! K^0 = I
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! zero sweeps of any smoother is just the identity.
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!
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call psb_geaxpby(alpha,x,beta,y,desc_data,info)
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else
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if (allocated(sm%sv)) then
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call sm%sv%apply(alpha,x,beta,y,desc_data,trans,work,info,init=init, initu=initu)
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else
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info = 1121
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endif
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end if
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if (info /= psb_success_) then
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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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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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end subroutine amg_s_base_smoother_apply
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