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.
85 lines
3.1 KiB
Fortran
85 lines
3.1 KiB
Fortran
!
|
|
!
|
|
! AMG4PSBLAS version 1.0
|
|
! Algebraic Multigrid Package
|
|
! based on PSBLAS (Parallel Sparse BLAS version 3.7)
|
|
!
|
|
! (C) Copyright 2021
|
|
!
|
|
! Salvatore Filippone
|
|
! Pasqua D'Ambra
|
|
! Fabio Durastante
|
|
!
|
|
! 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 AMG4PSBLAS 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 AMG4PSBLAS 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 amg_c_base_ainv_update_a(sv,x,desc_data,info)
|
|
use amg_c_base_ainv_mod, amg_protect_name => amg_c_base_ainv_update_a
|
|
use psb_base_mod
|
|
|
|
implicit none
|
|
|
|
type(psb_desc_type), intent(in) :: desc_data
|
|
class(amg_c_base_ainv_solver_type), intent(inout) :: sv
|
|
complex(psb_spk_),intent(in) :: x(:)
|
|
integer(psb_ipk_), intent(out) :: info
|
|
|
|
! Local variables
|
|
complex(psb_spk_), allocatable :: dd(:), ee(:)
|
|
integer(psb_ipk_) :: nrows, ncols, i, j, k, nzr, nzc, ir, ic
|
|
|
|
type(psb_c_csc_sparse_mat) :: ac
|
|
type(psb_c_csr_sparse_mat) :: ar
|
|
|
|
dd = sv%dv%get_vect()
|
|
if (size(x)<size(dd)) then
|
|
write(0,*) 'Wrong size in update',size(x),size(dd)
|
|
info = -1
|
|
return
|
|
end if
|
|
|
|
ee = x(1:size(dd))
|
|
call sv%z%cp_to(ac)
|
|
call sv%w%cp_to(ar)
|
|
! Compute diag(W ee Z)
|
|
! First ee Z
|
|
call ac%scal(ee,info,side='L')
|
|
! Then diag(W (ee Z))
|
|
do i=1,ar%get_nrows()
|
|
ir = ar%irp(i); nzr = ar%irp(i+1)-ar%irp(i)
|
|
ic = ac%icp(i); nzc = ac%icp(i+1)-ac%icp(i)
|
|
ee(i) = psb_spdot_srtd(&
|
|
& nzr,ar%ja(ir:ir+nzr-1),ar%val(ir:ir+nzr-1),&
|
|
& nzc,ac%ia(ic:ic+nzc-1),ac%val(ic:ic+nzc-1))
|
|
end do
|
|
! Now invert diagonal
|
|
dd = done/dd
|
|
dd = dd + ee
|
|
dd = done/dd
|
|
sv%d = dd
|
|
call sv%dv%bld(dd,mold=sv%dv%v)
|
|
|
|
end subroutine amg_c_base_ainv_update_a
|