amg4psblas/psb_dslu_bld.f90

!!$ 
!!$ 
!!$                    MD2P4
!!$    Multilevel Domain Decomposition Parallel Preconditioner Package for PSBLAS
!!$                      for 
!!$              Parallel Sparse BLAS  v2.0
!!$    (C) Copyright 2006 Salvatore Filippone    University of Rome Tor Vergata
!!$                       Alfredo Buttari        University of Rome Tor Vergata
!!$                       Daniela di Serafino    Second University of Naples
!!$                       Pasqua D'Ambra         ICAR-CNR                      
!!$ 
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!!$    3. The name of the MD2P4 group or the names of its contributors may
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!!$  
subroutine psb_dslu_bld(a,desc_a,p,info)
  use psb_base_mod
  use psb_prec_mod, mld_protect_name => psb_dslu_bld

  implicit none 

  type(psb_dspmat_type), intent(in)      :: a
  type(psb_desc_type), intent(in)        :: desc_a
  type(psb_dbaseprc_type), intent(inout) :: p
  integer, intent(out)                   :: info

  integer                  :: i,j,nza,nzb,nzt,ictxt,me,np,err_act
  logical, parameter :: debug=.false.
  character(len=20)   :: name, ch_err

  if(psb_get_errstatus().ne.0) return 
  info=0
  name='psb_dslu_bld'
  call psb_erractionsave(err_act)

  ictxt = psb_cd_get_context(desc_a)

  call psb_info(ictxt, me, np)

  if (toupper(a%fida) /= 'CSR') then 
    write(0,*) 'Unimplemented input to SLU_BLD'
    goto 9999
  endif


  nzt = psb_sp_get_nnzeros(a)

  if (Debug) then 
    write(0,*) me,'Calling psb_slu_factor ',nzt,a%m,&
         & a%k,p%desc_data%matrix_data(psb_n_row_)
    call psb_barrier(ictxt)
  endif

  call psb_dslu_factor(a%m,nzt,&
       & a%aspk,a%ia2,a%ia1,p%iprcparm(slu_ptr_),info)

  if (info /= 0) then
    ch_err='psb_slu_fact'
    call psb_errpush(4110,name,a_err=ch_err,i_err=(/info,0,0,0,0/))
    goto 9999
  end if

  if (Debug) then 
    write(0,*) me, 'SPLUBLD: Done slu_Factor',info,p%iprcparm(slu_ptr_)
    call psb_barrier(ictxt)
  endif

  call psb_erractionrestore(err_act)
  return

9999 continue
  call psb_erractionrestore(err_act)
  if (err_act.eq.psb_act_abort_) then
    call psb_error()
    return
  end if
  return

end subroutine psb_dslu_bld