psblas3/base/modules/psb_s_linmap_mod.f90

!!$ 
!!$              Parallel Sparse BLAS  version 3.0
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!!$                       Salvatore Filippone    University of Rome Tor Vergata
!!$                       Alfredo Buttari        CNRS-IRIT, Toulouse
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!
!
! package: psb_linmap_mod
!    Defines facilities for mapping between vectors belonging
!    to different spaces.
!
module psb_s_linmap_mod

  use psb_const_mod
  use psb_linmap_type_mod


  interface psb_map_X2Y
    subroutine psb_s_map_X2Y(alpha,x,beta,y,map,info,work)
      use psb_linmap_type_mod
      implicit none 
      type(psb_slinmap_type), intent(in) :: map
      real(psb_spk_), intent(in)     :: alpha,beta
      real(psb_spk_), intent(inout)  :: x(:)
      real(psb_spk_), intent(out)    :: y(:)
      integer, intent(out)           :: info 
      real(psb_spk_), optional       :: work(:)
    end subroutine psb_s_map_X2Y
  end interface

  interface psb_map_Y2X
    subroutine psb_s_map_Y2X(alpha,x,beta,y,map,info,work)
      use psb_linmap_type_mod
      implicit none 
      type(psb_slinmap_type), intent(in) :: map
      real(psb_spk_), intent(in)     :: alpha,beta
      real(psb_spk_), intent(inout)  :: x(:)
      real(psb_spk_), intent(out)    :: y(:)
      integer, intent(out)           :: info 
      real(psb_spk_), optional       :: work(:)
    end subroutine psb_s_map_Y2X
  end interface


  interface psb_is_ok_map
    module procedure psb_is_ok_slinmap
  end interface

  interface psb_get_map_kind
    module procedure psb_get_smap_kind
  end interface

  interface psb_set_map_kind
    module procedure psb_set_smap_kind
  end interface

  interface psb_is_asb_map
    module procedure psb_is_asb_slinmap
  end interface

  interface psb_linmap_sub
    module procedure psb_s_linmap_sub
  end interface

  interface psb_move_alloc
    module procedure psb_slinmap_transfer
  end interface

  interface psb_linmap
    function psb_s_linmap(map_kind,desc_X, desc_Y, map_X2Y, map_Y2X,iaggr,naggr)
      use psb_linmap_type_mod
      implicit none 
      type(psb_slinmap_type)         :: psb_s_linmap    
      type(psb_desc_type), target       :: desc_X, desc_Y
      type(psb_sspmat_type), intent(in) :: map_X2Y, map_Y2X
      integer, intent(in)               :: map_kind
      integer, intent(in), optional     :: iaggr(:), naggr(:)
    end function psb_s_linmap
  end interface

  interface psb_sizeof
    module procedure psb_slinmap_sizeof
  end interface

contains

  function psb_get_smap_kind(map)    
    implicit none
    type(psb_slinmap_type), intent(in) :: map
    Integer                      :: psb_get_smap_kind
    if (allocated(map%itd_data)) then
      psb_get_smap_kind = map%itd_data(psb_map_kind_) 
    else    
      psb_get_smap_kind = -1
    end if
  end function psb_get_smap_kind


  subroutine psb_set_smap_kind(map_kind,map)    
    implicit none
    integer, intent(in)          :: map_kind
    type(psb_slinmap_type), intent(inout) :: map

    map%itd_data(psb_map_kind_) = map_kind

  end subroutine psb_set_smap_kind


  function psb_is_asb_slinmap(map) result(this)
    use psb_descriptor_type
    implicit none 
    type(psb_slinmap_type), intent(in) :: map
    logical :: this

    this = .false.
    if (.not.allocated(map%itd_data)) return
    select case(psb_get_map_kind(map))
    case (psb_map_aggr_)
      if (.not.associated(map%p_desc_X)) return
      if (.not.associated(map%p_desc_Y)) return
      this  = &
           & psb_is_asb_desc(map%p_desc_X).and.psb_is_asb_desc(map%p_desc_Y)    

    case(psb_map_gen_linear_)    

      this = &
           & psb_is_asb_desc(map%desc_X).and.psb_is_asb_desc(map%desc_Y)    

    end select

  end function psb_is_asb_slinmap

  function psb_is_ok_slinmap(map) result(this)
    use psb_descriptor_type
    implicit none 
    type(psb_slinmap_type), intent(in) :: map
    logical  :: this
    this = .false.
    if (.not.allocated(map%itd_data)) return
    select case(psb_get_map_kind(map))
    case (psb_map_aggr_)
      if (.not.associated(map%p_desc_X)) return
      if (.not.associated(map%p_desc_Y)) return
      this = &
           & psb_is_ok_desc(map%p_desc_X).and.psb_is_ok_desc(map%p_desc_Y)    
    case(psb_map_gen_linear_)    
      this = &
           & psb_is_ok_desc(map%desc_X).and.psb_is_ok_desc(map%desc_Y)    
    end select

  end function psb_is_ok_slinmap

  function psb_slinmap_sizeof(map) result(val)
    use psb_descriptor_type
    use psb_mat_mod, only : psb_sizeof
    implicit none 
    type(psb_slinmap_type), intent(in) :: map
    integer(psb_long_int_k_) :: val

    val = 0
    if (allocated(map%itd_data))   &
         & val = val + psb_sizeof_int*size(map%itd_data)
    if (allocated(map%iaggr))   &
         & val = val + psb_sizeof_int*size(map%iaggr)
    if (allocated(map%naggr))   &
         & val = val + psb_sizeof_int*size(map%naggr)
    val = val + psb_sizeof(map%desc_X)
    val = val + psb_sizeof(map%desc_Y)
    val = val + psb_sizeof(map%map_X2Y)
    val = val + psb_sizeof(map%map_Y2X)

  end function psb_slinmap_sizeof


  subroutine psb_s_linmap_sub(out_map,map_kind,desc_X, desc_Y,&
       & map_X2Y, map_Y2X,iaggr,naggr)
    use psb_linmap_type_mod
    implicit none 
    type(psb_slinmap_type), intent(out) :: out_map    
    type(psb_desc_type), target       :: desc_X, desc_Y
    type(psb_sspmat_type), intent(in) :: map_X2Y, map_Y2X
    integer, intent(in)               :: map_kind
    integer, intent(in), optional     :: iaggr(:), naggr(:)
    out_map = psb_linmap(map_kind,desc_X,desc_Y,map_X2Y,map_Y2X,iaggr,naggr)
  end subroutine psb_s_linmap_sub

  
  subroutine  psb_slinmap_transfer(mapin,mapout,info)
    use psb_realloc_mod
    use psb_descriptor_type
    use psb_mat_mod, only : psb_move_alloc
    implicit none 
    type(psb_slinmap_type) :: mapin,mapout
    integer, intent(out)      :: info 
    
    call psb_move_alloc(mapin%itd_data,mapout%itd_data,info)
    call psb_move_alloc(mapin%iaggr,mapout%iaggr,info)
    call psb_move_alloc(mapin%naggr,mapout%naggr,info)
    mapout%p_desc_X => mapin%p_desc_X 
    mapin%p_desc_X  => null()
    mapout%p_desc_Y => mapin%p_desc_Y
    mapin%p_desc_Y  => null()
    call psb_move_alloc(mapin%desc_X,mapout%desc_X,info)
    call psb_move_alloc(mapin%desc_Y,mapout%desc_Y,info)
    call psb_move_alloc(mapin%map_X2Y,mapout%map_X2Y,info)
    call psb_move_alloc(mapin%map_Y2X,mapout%map_Y2X,info)

  end subroutine psb_slinmap_transfer
  

end module psb_s_linmap_mod