! ! ! 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