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142 lines
3.8 KiB
Fortran
142 lines
3.8 KiB
Fortran
subroutine mld_d_ilu_solver_apply_vect(alpha,sv,x,beta,y,desc_data,trans,work,info)
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use psb_base_mod
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use mld_d_ilu_solver, mld_protect_name => mld_d_ilu_solver_apply_vect
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implicit none
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type(psb_desc_type), intent(in) :: desc_data
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class(mld_d_ilu_solver_type), intent(inout) :: sv
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type(psb_d_vect_type),intent(inout) :: x
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type(psb_d_vect_type),intent(inout) :: y
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real(psb_dpk_),intent(in) :: alpha,beta
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character(len=1),intent(in) :: trans
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real(psb_dpk_),target, intent(inout) :: work(:)
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integer, intent(out) :: info
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integer :: n_row,n_col
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type(psb_d_vect_type) :: wv, wv1
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real(psb_dpk_), pointer :: ww(:), aux(:), tx(:),ty(:)
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integer :: ictxt,np,me,i, err_act
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character :: trans_
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character(len=20) :: name='d_ilu_solver_apply'
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call psb_erractionsave(err_act)
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info = psb_success_
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trans_ = psb_toupper(trans)
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select case(trans_)
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case('N')
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case('T')
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case('C')
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case default
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call psb_errpush(psb_err_iarg_invalid_i_,name)
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goto 9999
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end select
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n_row = desc_data%get_local_rows()
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n_col = desc_data%get_local_cols()
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if (x%get_nrows() < n_row) then
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info = 36
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call psb_errpush(info,name,i_err=(/2,n_row,0,0,0/))
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goto 9999
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end if
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if (y%get_nrows() < n_row) then
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info = 36
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call psb_errpush(info,name,i_err=(/3,n_row,0,0,0/))
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goto 9999
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end if
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if (.not.allocated(sv%dv%v)) then
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info = 1124
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call psb_errpush(info,name,a_err="preconditioner: D")
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goto 9999
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end if
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if (sv%dv%get_nrows() < n_row) then
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info = 1124
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call psb_errpush(info,name,a_err="preconditioner: DV")
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goto 9999
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end if
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if (n_col <= size(work)) then
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ww => work(1:n_col)
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if ((4*n_col+n_col) <= size(work)) then
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aux => work(n_col+1:)
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else
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allocate(aux(4*n_col),stat=info)
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endif
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else
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allocate(ww(n_col),aux(4*n_col),stat=info)
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endif
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if (info /= psb_success_) then
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info=psb_err_alloc_request_
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call psb_errpush(info,name,i_err=(/5*n_col,0,0,0,0/),&
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& a_err='real(psb_dpk_)')
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goto 9999
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end if
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call psb_geasb(wv,desc_data,info,mold=x%v,scratch=.true.)
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call psb_geasb(wv1,desc_data,info,mold=x%v,scratch=.true.)
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select case(trans_)
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case('N')
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call psb_spsm(done,sv%l,x,dzero,wv,desc_data,info,&
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& trans=trans_,scale='L',diag=sv%dv,choice=psb_none_,work=aux)
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if (info == psb_success_) call psb_spsm(alpha,sv%u,wv,beta,y,desc_data,info,&
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& trans=trans_,scale='U',choice=psb_none_, work=aux)
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case('T')
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call psb_spsm(done,sv%u,x,dzero,wv,desc_data,info,&
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& trans=trans_,scale='L',diag=sv%dv,choice=psb_none_,work=aux)
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if (info == psb_success_) call psb_spsm(alpha,sv%l,wv,beta,y,desc_data,info,&
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& trans=trans_,scale='U',choice=psb_none_,work=aux)
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case('C')
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call psb_spsm(done,sv%u,x,dzero,wv,desc_data,info,&
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& trans=trans_,scale='U',choice=psb_none_,work=aux)
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call wv1%mlt(done,sv%dv,wv,dzero,info,conjgx=trans_)
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if (info == psb_success_) call psb_spsm(alpha,sv%l,wv1,beta,y,desc_data,info,&
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& trans=trans_,scale='U',choice=psb_none_,work=aux)
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case default
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call psb_errpush(psb_err_internal_error_,name,a_err='Invalid TRANS in ILU subsolve')
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goto 9999
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end select
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if (info /= psb_success_) then
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call psb_errpush(psb_err_internal_error_,name,a_err='Error in subsolve')
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goto 9999
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endif
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call wv%free(info)
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call wv1%free(info)
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if (n_col <= size(work)) then
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if ((4*n_col+n_col) <= size(work)) then
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else
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deallocate(aux)
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endif
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else
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deallocate(ww,aux)
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endif
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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_ilu_solver_apply_vect
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