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94 lines
2.6 KiB
Fortran
94 lines
2.6 KiB
Fortran
12 years ago
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subroutine mld_d_diag_solver_bld(a,desc_a,sv,upd,info,b,amold,vmold)
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use psb_base_mod
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use mld_d_diag_solver, mld_protect_name => mld_d_diag_solver_bld
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Implicit None
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! Arguments
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type(psb_dspmat_type), intent(in), target :: a
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Type(psb_desc_type), Intent(in) :: desc_a
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class(mld_d_diag_solver_type), intent(inout) :: sv
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character, intent(in) :: upd
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integer, intent(out) :: info
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type(psb_dspmat_type), intent(in), target, optional :: b
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class(psb_d_base_sparse_mat), intent(in), optional :: amold
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class(psb_d_base_vect_type), intent(in), optional :: vmold
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! Local variables
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integer :: n_row,n_col, nrow_a, nztota
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real(psb_dpk_), pointer :: ww(:), aux(:), tx(:),ty(:)
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integer :: ictxt,np,me,i, err_act, debug_unit, debug_level
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character(len=20) :: name='d_diag_solver_bld', ch_err
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info=psb_success_
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call psb_erractionsave(err_act)
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debug_unit = psb_get_debug_unit()
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debug_level = psb_get_debug_level()
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ictxt = desc_a%get_context()
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call psb_info(ictxt, me, np)
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),' start'
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n_row = desc_a%get_local_rows()
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nrow_a = a%get_nrows()
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if (allocated(sv%d)) then
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if (size(sv%d) < n_row) then
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deallocate(sv%d)
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endif
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endif
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if (.not.allocated(sv%d)) then
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allocate(sv%d(n_row),stat=info)
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='Allocate')
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goto 9999
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end if
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endif
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call a%get_diag(sv%d,info)
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if (present(b)) then
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if (info == psb_success_) call b%get_diag(sv%d(nrow_a+1:), info)
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end if
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if (info /= psb_success_) then
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call psb_errpush(psb_err_from_subroutine_,name,a_err='get_diag')
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goto 9999
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end if
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do i=1,n_row
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if (sv%d(i) == dzero) then
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sv%d(i) = done
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else
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sv%d(i) = done/sv%d(i)
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end if
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end do
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allocate(sv%dv,stat=info)
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if (info == psb_success_) then
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if (present(vmold)) then
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allocate(sv%dv%v,mold=vmold,stat=info)
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else
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allocate(psb_d_base_vect_type :: sv%dv%v,stat=info)
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end if
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end if
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if (info == psb_success_) then
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call sv%dv%bld(sv%d)
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else
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call psb_errpush(psb_err_from_subroutine_,name,a_err='Allocate sv%dv')
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goto 9999
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end if
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if (debug_level >= psb_debug_outer_) &
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& write(debug_unit,*) me,' ',trim(name),' end'
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine mld_d_diag_solver_bld
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