psblas3/base/modules/psi_mod.f90

!!$ 
!!$              Parallel Sparse BLAS  version 3.0
!!$    (C) Copyright 2006, 2007, 2008, 2009, 2010
!!$                       Salvatore Filippone    University of Rome Tor Vergata
!!$                       Alfredo Buttari        CNRS-IRIT, Toulouse
!!$ 
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!!$  modification, are permitted provided that the following conditions
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!!$       notice, this list of conditions and the following disclaimer.
!!$    2. Redistributions in binary form must reproduce the above copyright
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!!$    3. The name of the PSBLAS group or the names of its contributors may
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!!$  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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!!$  
module psi_mod

  use psi_serial_mod
  use psb_descriptor_type
  use psb_const_mod
  use psb_error_mod
  use psb_penv_mod


  interface
    subroutine psi_compute_size(desc_data,&
         & index_in, dl_lda, info)
      integer  :: info, dl_lda
      integer  :: desc_data(:), index_in(:)
    end subroutine psi_compute_size
  end interface

  interface
    subroutine psi_crea_bnd_elem(bndel,desc_a,info)
      use psb_descriptor_type
      integer, allocatable            :: bndel(:)
      type(psb_desc_type), intent(in) :: desc_a
      integer, intent(out)            :: info
    end subroutine psi_crea_bnd_elem
  end interface

  interface
    subroutine psi_crea_index(desc_a,index_in,index_out,glob_idx,nxch,nsnd,nrcv,info)
      use psb_descriptor_type, only : psb_desc_type
      type(psb_desc_type), intent(in)     :: desc_a
      integer, intent(out)                :: info,nxch,nsnd,nrcv
      integer, intent(in)                 :: index_in(:)
      integer, allocatable, intent(inout) :: index_out(:)
      logical                             :: glob_idx
    end subroutine psi_crea_index
  end interface

  interface
    subroutine psi_crea_ovr_elem(me,desc_overlap,ovr_elem,info)
      integer, intent(in)               :: me, desc_overlap(:)
      integer, allocatable, intent(out) :: ovr_elem(:,:)
      integer, intent(out)              :: info
    end subroutine psi_crea_ovr_elem
  end interface

  interface
    subroutine psi_desc_index(desc,index_in,dep_list,&
         & length_dl,nsnd,nrcv,desc_index,isglob_in,info)
      use psb_descriptor_type, only : psb_desc_type
      type(psb_desc_type) :: desc
      integer         :: index_in(:),dep_list(:)
      integer,allocatable  :: desc_index(:)
      integer         :: length_dl,nsnd,nrcv,info
      logical         :: isglob_in
    end subroutine psi_desc_index
  end interface

  interface
    subroutine psi_dl_check(dep_list,dl_lda,np,length_dl)
      integer  :: np,dl_lda,length_dl(0:np)
      integer  :: dep_list(dl_lda,0:np)
    end subroutine psi_dl_check
  end interface

  interface
    subroutine psi_sort_dl(dep_list,l_dep_list,np,info)
      integer :: np,dep_list(:,:), l_dep_list(:), info
    end subroutine psi_sort_dl
  end interface

  interface psi_swapdata
    subroutine psi_sswapdatam(flag,n,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_spk_
      integer, intent(in)         :: flag, n
      integer, intent(out)        :: info
      real(psb_spk_)              :: y(:,:), beta
      real(psb_spk_),target       :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_sswapdatam
    subroutine psi_sswapdatav(flag,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_spk_
      integer, intent(in)         :: flag
      integer, intent(out)        :: info
      real(psb_spk_)              :: y(:), beta 
      real(psb_spk_),target       :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_sswapdatav
    subroutine psi_sswapidxm(ictxt,icomm,flag,n,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)   :: ictxt,icomm,flag, n
      integer, intent(out)  :: info
      real(psb_spk_)        :: y(:,:), beta
      real(psb_spk_),target :: work(:)
      integer, intent(in)   :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_sswapidxm
    subroutine psi_sswapidxv(ictxt,icomm,flag,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)   :: ictxt,icomm,flag
      integer, intent(out)  :: info
      real(psb_spk_)        :: y(:), beta
      real(psb_spk_),target :: work(:)
      integer, intent(in)   :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_sswapidxv
    subroutine psi_dswapdatam(flag,n,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_dpk_
      integer, intent(in)         :: flag, n
      integer, intent(out)        :: info
      real(psb_dpk_)              :: y(:,:), beta
      real(psb_dpk_),target       :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_dswapdatam
    subroutine psi_dswapdatav(flag,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_dpk_
      integer, intent(in)         :: flag
      integer, intent(out)        :: info
      real(psb_dpk_)              :: y(:), beta 
      real(psb_dpk_),target       :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_dswapdatav
    subroutine psi_dswapidxm(ictxt,icomm,flag,n,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)   :: ictxt,icomm,flag, n
      integer, intent(out)  :: info
      real(psb_dpk_)        :: y(:,:), beta
      real(psb_dpk_),target :: work(:)
      integer, intent(in)   :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_dswapidxm
    subroutine psi_dswapidxv(ictxt,icomm,flag,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)   :: ictxt,icomm,flag
      integer, intent(out)  :: info
      real(psb_dpk_)        :: y(:), beta
      real(psb_dpk_),target :: work(:)
      integer, intent(in)   :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_dswapidxv
    subroutine psi_iswapdatam(flag,n,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(in)         :: flag, n
      integer, intent(out)        :: info
      integer                     :: y(:,:), beta
      integer, target             :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_iswapdatam
    subroutine psi_iswapdatav(flag,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(in)         :: flag
      integer, intent(out)        :: info
      integer                     :: y(:), beta
      integer, target             :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_iswapdatav
    subroutine psi_iswapidxm(ictxt,icomm,flag,n,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)  :: ictxt,icomm,flag, n
      integer, intent(out) :: info
      integer              :: y(:,:), beta
      integer,target       :: work(:)
      integer, intent(in)  :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_iswapidxm
    subroutine psi_iswapidxv(ictxt,icomm,flag,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)  :: ictxt,icomm,flag
      integer, intent(out) :: info
      integer              :: y(:), beta
      integer,target       :: work(:)
      integer, intent(in)  :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_iswapidxv
    subroutine psi_cswapdatam(flag,n,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_spk_
      integer, intent(in)         :: flag, n
      integer, intent(out)        :: info
      complex(psb_spk_)           :: y(:,:), beta
      complex(psb_spk_),target    :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_cswapdatam
    subroutine psi_cswapdatav(flag,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_spk_
      integer, intent(in)         :: flag
      integer, intent(out)        :: info
      complex(psb_spk_)           :: y(:), beta
      complex(psb_spk_),target    :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_cswapdatav
    subroutine psi_cswapidxm(ictxt,icomm,flag,n,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)  :: ictxt,icomm,flag, n
      integer, intent(out) :: info
      complex(psb_spk_)     :: y(:,:), beta
      complex(psb_spk_),target :: work(:)
      integer, intent(in)  :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_cswapidxm
    subroutine psi_cswapidxv(ictxt,icomm,flag,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)      :: ictxt,icomm,flag
      integer, intent(out)     :: info
      complex(psb_spk_)        :: y(:), beta
      complex(psb_spk_),target :: work(:)
      integer, intent(in)      :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_cswapidxv
    subroutine psi_zswapdatam(flag,n,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_dpk_
      integer, intent(in)         :: flag, n
      integer, intent(out)        :: info
      complex(psb_dpk_)           :: y(:,:), beta
      complex(psb_dpk_),target    :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_zswapdatam
    subroutine psi_zswapdatav(flag,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_dpk_
      integer, intent(in)         :: flag
      integer, intent(out)        :: info
      complex(psb_dpk_)           :: y(:), beta
      complex(psb_dpk_),target    :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_zswapdatav
    subroutine psi_zswapidxm(ictxt,icomm,flag,n,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)      :: ictxt,icomm,flag, n
      integer, intent(out)     :: info
      complex(psb_dpk_)        :: y(:,:), beta
      complex(psb_dpk_),target :: work(:)
      integer, intent(in)      :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_zswapidxm
    subroutine psi_zswapidxv(ictxt,icomm,flag,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)      :: ictxt,icomm,flag
      integer, intent(out)     :: info
      complex(psb_dpk_)        :: y(:), beta
      complex(psb_dpk_),target :: work(:)
      integer, intent(in)      :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_zswapidxv
  end interface


  interface psi_swaptran
    subroutine psi_sswaptranm(flag,n,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_spk_
      integer, intent(in)         :: flag, n
      integer, intent(out)        :: info
      real(psb_spk_)              :: y(:,:), beta
      real(psb_spk_),target       :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_sswaptranm
    subroutine psi_sswaptranv(flag,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_spk_
      integer, intent(in)         :: flag
      integer, intent(out)        :: info
      real(psb_spk_)              :: y(:), beta
      real(psb_spk_),target       :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_sswaptranv
    subroutine psi_stranidxm(ictxt,icomm,flag,n,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)   :: ictxt,icomm,flag, n
      integer, intent(out)  :: info
      real(psb_spk_)        :: y(:,:), beta
      real(psb_spk_),target :: work(:)
      integer, intent(in)   :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_stranidxm
    subroutine psi_stranidxv(ictxt,icomm,flag,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)   :: ictxt,icomm,flag
      integer, intent(out)  :: info
      real(psb_spk_)        :: y(:), beta
      real(psb_spk_),target :: work(:)
      integer, intent(in)   :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_stranidxv
    subroutine psi_dswaptranm(flag,n,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_dpk_
      integer, intent(in)         :: flag, n
      integer, intent(out)        :: info
      real(psb_dpk_)              :: y(:,:), beta
      real(psb_dpk_),target       :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_dswaptranm
    subroutine psi_dswaptranv(flag,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_dpk_
      integer, intent(in)         :: flag
      integer, intent(out)        :: info
      real(psb_dpk_)              :: y(:), beta
      real(psb_dpk_),target       :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_dswaptranv
    subroutine psi_dtranidxm(ictxt,icomm,flag,n,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)   :: ictxt,icomm,flag, n
      integer, intent(out)  :: info
      real(psb_dpk_)        :: y(:,:), beta
      real(psb_dpk_),target :: work(:)
      integer, intent(in)   :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_dtranidxm
    subroutine psi_dtranidxv(ictxt,icomm,flag,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)   :: ictxt,icomm,flag
      integer, intent(out)  :: info
      real(psb_dpk_)        :: y(:), beta
      real(psb_dpk_),target :: work(:)
      integer, intent(in)   :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_dtranidxv
    subroutine psi_iswaptranm(flag,n,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(in)         :: flag, n
      integer, intent(out)        :: info
      integer                     :: y(:,:), beta
      integer,target              :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_iswaptranm
    subroutine psi_iswaptranv(flag,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(in)         :: flag
      integer, intent(out)        :: info
      integer                     :: y(:), beta
      integer,target              :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_iswaptranv
    subroutine psi_itranidxm(ictxt,icomm,flag,n,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)  :: ictxt,icomm,flag, n
      integer, intent(out) :: info
      integer              :: y(:,:), beta
      integer, target      :: work(:)
      integer, intent(in)  :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_itranidxm
    subroutine psi_itranidxv(ictxt,icomm,flag,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)  :: ictxt,icomm,flag
      integer, intent(out) :: info
      integer              :: y(:), beta
      integer, target      :: work(:)
      integer, intent(in)  :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_itranidxv
    subroutine psi_cswaptranm(flag,n,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_spk_
      integer, intent(in)         :: flag, n
      integer, intent(out)        :: info
      complex(psb_spk_)           :: y(:,:), beta
      complex(psb_spk_),target    :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_cswaptranm
    subroutine psi_cswaptranv(flag,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_spk_
      integer, intent(in)         :: flag
      integer, intent(out)        :: info
      complex(psb_spk_)           :: y(:), beta
      complex(psb_spk_),target    :: work(:)       
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_cswaptranv
    subroutine psi_ctranidxm(ictxt,icomm,flag,n,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)       :: ictxt,icomm,flag, n
      integer, intent(out)      :: info
      complex(psb_spk_)         :: y(:,:), beta
      complex(psb_spk_), target :: work(:)
      integer, intent(in)       :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_ctranidxm
    subroutine psi_ctranidxv(ictxt,icomm,flag,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)       :: ictxt,icomm,flag
      integer, intent(out)      :: info
      complex(psb_spk_)         :: y(:), beta
      complex(psb_spk_), target :: work(:)
      integer, intent(in)       :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_ctranidxv
    subroutine psi_zswaptranm(flag,n,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_dpk_
      integer, intent(in)         :: flag, n
      integer, intent(out)        :: info
      complex(psb_dpk_)           :: y(:,:), beta
      complex(psb_dpk_),target    :: work(:)
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_zswaptranm
    subroutine psi_zswaptranv(flag,beta,y,desc_a,work,info,data)
      use psb_descriptor_type, only : psb_desc_type, psb_dpk_
      integer, intent(in)         :: flag
      integer, intent(out)        :: info
      complex(psb_dpk_)           :: y(:), beta
      complex(psb_dpk_),target    :: work(:)       
      type(psb_desc_type), target :: desc_a
      integer, optional           :: data
    end subroutine psi_zswaptranv
    subroutine psi_ztranidxm(ictxt,icomm,flag,n,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)       :: ictxt,icomm,flag, n
      integer, intent(out)      :: info
      complex(psb_dpk_)         :: y(:,:), beta
      complex(psb_dpk_), target :: work(:)
      integer, intent(in)       :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_ztranidxm
    subroutine psi_ztranidxv(ictxt,icomm,flag,beta,y,idx,totxch,totsnd,totrcv,work,info)
      use psb_const_mod
      integer, intent(in)       :: ictxt,icomm,flag
      integer, intent(out)      :: info
      complex(psb_dpk_)         :: y(:), beta
      complex(psb_dpk_), target :: work(:)
      integer, intent(in)       :: idx(:),totxch,totsnd,totrcv
    end subroutine psi_ztranidxv
  end interface

  interface
    subroutine psi_extract_dep_list(ictxt,is_bld,is_upd,desc_str,dep_list,&
         & length_dl,np,dl_lda,mode,info)
      logical :: is_bld, is_upd
      integer :: ictxt,np,dl_lda,mode, info
      integer :: desc_str(*),dep_list(dl_lda,0:np),length_dl(0:np)
    end subroutine psi_extract_dep_list
  end interface

  interface psi_fnd_owner
    subroutine psi_fnd_owner(nv,idx,iprc,desc,info)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(in) :: nv
      integer, intent(in) ::  idx(:)
      integer, allocatable, intent(out) ::  iprc(:)
      type(psb_desc_type), intent(in) :: desc
      integer, intent(out) :: info
    end subroutine psi_fnd_owner
  end interface

  interface psi_ldsc_pre_halo
    subroutine psi_ldsc_pre_halo(desc,ext_hv,info)
      use psb_descriptor_type, only : psb_desc_type
      type(psb_desc_type), intent(inout) :: desc
      logical, intent(in)  :: ext_hv
      integer, intent(out) :: info
    end subroutine psi_ldsc_pre_halo
  end interface

  interface psi_bld_tmphalo
    subroutine psi_bld_tmphalo(desc,info)
      use psb_descriptor_type, only : psb_desc_type
      type(psb_desc_type), intent(inout) :: desc
      integer, intent(out) :: info
    end subroutine psi_bld_tmphalo
  end interface


  interface psi_bld_tmpovrl
    subroutine psi_bld_tmpovrl(iv,desc,info)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(in)  :: iv(:)
      type(psb_desc_type), intent(inout) :: desc
      integer, intent(out) :: info
    end subroutine psi_bld_tmpovrl
  end interface


  interface psi_idx_cnv
    subroutine psi_idx_cnv1(nv,idxin,desc,info,mask,owned)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(in)    :: nv
      integer, intent(inout) ::  idxin(:)
      type(psb_desc_type), intent(in) :: desc
      integer, intent(out) :: info
      logical, intent(in), optional :: mask(:)
      logical, intent(in), optional :: owned
    end subroutine psi_idx_cnv1
    subroutine psi_idx_cnv2(nv,idxin,idxout,desc,info,mask,owned)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(in)  :: nv, idxin(:)
      integer, intent(out) :: idxout(:)
      type(psb_desc_type), intent(in) :: desc
      integer, intent(out) :: info
      logical, intent(in), optional :: mask(:)
      logical, intent(in), optional :: owned
    end subroutine psi_idx_cnv2
    subroutine psi_idx_cnvs(idxin,idxout,desc,info,mask,owned)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(in)  :: idxin
      integer, intent(out) :: idxout
      type(psb_desc_type), intent(in) :: desc
      integer, intent(out) :: info
      logical, intent(in), optional :: mask
      logical, intent(in), optional :: owned
    end subroutine psi_idx_cnvs
    subroutine psi_idx_cnvs1(idxin,desc,info,mask,owned)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(inout)  :: idxin
      type(psb_desc_type), intent(in) :: desc
      integer, intent(out) :: info
      logical, intent(in), optional :: mask
      logical, intent(in), optional :: owned
    end subroutine psi_idx_cnvs1
  end interface

  interface psi_idx_ins_cnv
    subroutine psi_idx_ins_cnv1(nv,idxin,desc,info,mask)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(in)    :: nv
      integer, intent(inout) ::  idxin(:)
      type(psb_desc_type), intent(inout) :: desc
      integer, intent(out) :: info
      logical, intent(in), optional :: mask(:)
    end subroutine psi_idx_ins_cnv1
    subroutine psi_idx_ins_cnv2(nv,idxin,idxout,desc,info,mask)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(in)  :: nv, idxin(:)
      integer, intent(out) :: idxout(:)
      type(psb_desc_type), intent(inout) :: desc
      integer, intent(out) :: info
      logical, intent(in), optional :: mask(:)
    end subroutine psi_idx_ins_cnv2
    subroutine psi_idx_ins_cnvs2(idxin,idxout,desc,info,mask)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(in)  :: idxin
      integer, intent(out) :: idxout
      type(psb_desc_type), intent(inout) :: desc
      integer, intent(out) :: info
      logical, intent(in), optional :: mask
    end subroutine psi_idx_ins_cnvs2
    subroutine psi_idx_ins_cnvs1(idxin,desc,info,mask)
      use psb_descriptor_type, only : psb_desc_type
      integer, intent(inout)  :: idxin
      type(psb_desc_type), intent(inout) :: desc
      integer, intent(out) :: info
      logical, intent(in), optional :: mask
    end subroutine psi_idx_ins_cnvs1
  end interface

  interface psi_cnv_dsc
    subroutine psi_cnv_dsc(halo_in,ovrlap_in,ext_in,cdesc, info)
      use psb_descriptor_type, only: psb_desc_type
      integer, intent(in)                :: halo_in(:), ovrlap_in(:),ext_in(:)
      type(psb_desc_type), intent(inout) :: cdesc
      integer, intent(out)               :: info
    end subroutine psi_cnv_dsc
  end interface

  interface psi_renum_index
    subroutine psi_renum_index(iperm,idx,info)
      integer, intent(out)   :: info
      integer, intent(in)    :: iperm(:)
      integer, intent(inout) :: idx(:)
    end subroutine psi_renum_index
  end interface

  interface psi_inner_cnv
    subroutine psi_inner_cnvs(x,hashmask,hashv,glb_lc)
      integer, intent(in)    :: hashmask,hashv(0:),glb_lc(:,:)
      integer, intent(inout) :: x
    end subroutine psi_inner_cnvs
    subroutine psi_inner_cnvs2(x,y,hashmask,hashv,glb_lc)
      integer, intent(in)  :: hashmask,hashv(0:),glb_lc(:,:)
      integer, intent(in)  :: x
      integer, intent(out) :: y
    end subroutine psi_inner_cnvs2
    subroutine psi_inner_cnv1(n,x,hashmask,hashv,glb_lc,mask)
      integer, intent(in)    :: n,hashmask,hashv(0:),glb_lc(:,:)
      logical, intent(in), optional    :: mask(:)
      integer, intent(inout) :: x(:)
    end subroutine psi_inner_cnv1
    subroutine psi_inner_cnv2(n,x,y,hashmask,hashv,glb_lc,mask)
      integer, intent(in)  :: n, hashmask,hashv(0:),glb_lc(:,:)
      logical, intent(in),optional  :: mask(:)
      integer, intent(in)  :: x(:)
      integer, intent(out) :: y(:)
    end subroutine psi_inner_cnv2
  end interface

  interface psi_ovrl_upd
    subroutine  psi_iovrl_updr1(x,desc_a,update,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      integer, intent(inout), target     :: x(:)
      type(psb_desc_type), intent(in)    :: desc_a
      integer, intent(in)                :: update
      integer, intent(out)               :: info
    end subroutine psi_iovrl_updr1
    subroutine  psi_iovrl_updr2(x,desc_a,update,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      integer, intent(inout), target     :: x(:,:)
      type(psb_desc_type), intent(in)    :: desc_a
      integer, intent(in)                :: update
      integer, intent(out)               :: info
    end subroutine psi_iovrl_updr2
    subroutine  psi_sovrl_updr1(x,desc_a,update,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      real(psb_spk_), intent(inout), target :: x(:)
      type(psb_desc_type), intent(in)         :: desc_a
      integer, intent(in)                     :: update
      integer, intent(out)                    :: info
    end subroutine psi_sovrl_updr1
    subroutine  psi_sovrl_updr2(x,desc_a,update,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      real(psb_spk_), intent(inout), target :: x(:,:)
      type(psb_desc_type), intent(in)         :: desc_a
      integer, intent(in)                     :: update
      integer, intent(out)                    :: info
    end subroutine psi_sovrl_updr2
    subroutine  psi_dovrl_updr1(x,desc_a,update,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      real(psb_dpk_), intent(inout), target :: x(:)
      type(psb_desc_type), intent(in)         :: desc_a
      integer, intent(in)                     :: update
      integer, intent(out)                    :: info
    end subroutine psi_dovrl_updr1
    subroutine  psi_dovrl_updr2(x,desc_a,update,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      real(psb_dpk_), intent(inout), target :: x(:,:)
      type(psb_desc_type), intent(in)         :: desc_a
      integer, intent(in)                     :: update
      integer, intent(out)                    :: info
    end subroutine psi_dovrl_updr2
    subroutine  psi_covrl_updr1(x,desc_a,update,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      complex(psb_spk_), intent(inout), target :: x(:)
      type(psb_desc_type), intent(in)         :: desc_a
      integer, intent(in)                     :: update
      integer, intent(out)                    :: info
    end subroutine psi_covrl_updr1
    subroutine  psi_covrl_updr2(x,desc_a,update,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      complex(psb_spk_), intent(inout), target :: x(:,:)
      type(psb_desc_type), intent(in)         :: desc_a
      integer, intent(in)                     :: update
      integer, intent(out)                    :: info
    end subroutine psi_covrl_updr2
    subroutine  psi_zovrl_updr1(x,desc_a,update,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      complex(psb_dpk_), intent(inout), target :: x(:)
      type(psb_desc_type), intent(in)         :: desc_a
      integer, intent(in)                     :: update
      integer, intent(out)                    :: info
    end subroutine psi_zovrl_updr1
    subroutine  psi_zovrl_updr2(x,desc_a,update,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      complex(psb_dpk_), intent(inout), target :: x(:,:)
      type(psb_desc_type), intent(in)         :: desc_a
      integer, intent(in)                     :: update
      integer, intent(out)                    :: info
    end subroutine psi_zovrl_updr2
    
  end interface

  interface psi_ovrl_save
    subroutine  psi_iovrl_saver1(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      integer, intent(inout)  :: x(:)
      integer, allocatable    :: xs(:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_iovrl_saver1
    subroutine  psi_iovrl_saver2(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      integer, intent(inout)  :: x(:,:)
      integer, allocatable    :: xs(:,:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_iovrl_saver2
    subroutine  psi_sovrl_saver1(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      real(psb_spk_), intent(inout)  :: x(:)
      real(psb_spk_), allocatable    :: xs(:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_sovrl_saver1
    subroutine  psi_sovrl_saver2(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      real(psb_spk_), intent(inout)  :: x(:,:)
      real(psb_spk_), allocatable    :: xs(:,:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_sovrl_saver2
    subroutine  psi_dovrl_saver1(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      real(psb_dpk_), intent(inout)  :: x(:)
      real(psb_dpk_), allocatable    :: xs(:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_dovrl_saver1
    subroutine  psi_dovrl_saver2(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      real(psb_dpk_), intent(inout)  :: x(:,:)
      real(psb_dpk_), allocatable    :: xs(:,:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_dovrl_saver2
    subroutine  psi_covrl_saver1(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      complex(psb_spk_), intent(inout)  :: x(:)
      complex(psb_spk_), allocatable    :: xs(:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_covrl_saver1
    subroutine  psi_covrl_saver2(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      complex(psb_spk_), intent(inout)  :: x(:,:)
      complex(psb_spk_), allocatable    :: xs(:,:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_covrl_saver2
    subroutine  psi_zovrl_saver1(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      complex(psb_dpk_), intent(inout)  :: x(:)
      complex(psb_dpk_), allocatable    :: xs(:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_zovrl_saver1
    subroutine  psi_zovrl_saver2(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      complex(psb_dpk_), intent(inout)  :: x(:,:)
      complex(psb_dpk_), allocatable    :: xs(:,:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_zovrl_saver2
  end interface

  interface psi_ovrl_restore
    subroutine  psi_iovrl_restrr1(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      integer, intent(inout)           :: x(:)
      integer                          :: xs(:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_iovrl_restrr1
    subroutine  psi_iovrl_restrr2(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      integer, intent(inout)           :: x(:,:)
      integer                          :: xs(:,:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_iovrl_restrr2
    subroutine  psi_sovrl_restrr1(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      real(psb_spk_), intent(inout)  :: x(:)
      real(psb_spk_)                 :: xs(:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_sovrl_restrr1
    subroutine  psi_sovrl_restrr2(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      real(psb_spk_), intent(inout)  :: x(:,:)
      real(psb_spk_)                 :: xs(:,:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_sovrl_restrr2
    subroutine  psi_dovrl_restrr1(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      real(psb_dpk_), intent(inout)  :: x(:)
      real(psb_dpk_)                 :: xs(:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_dovrl_restrr1
    subroutine  psi_dovrl_restrr2(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      real(psb_dpk_), intent(inout)  :: x(:,:)
      real(psb_dpk_)                 :: xs(:,:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_dovrl_restrr2
    subroutine  psi_covrl_restrr1(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      complex(psb_spk_), intent(inout)  :: x(:)
      complex(psb_spk_)                 :: xs(:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_covrl_restrr1
    subroutine  psi_covrl_restrr2(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      complex(psb_spk_), intent(inout)  :: x(:,:)
      complex(psb_spk_)                 :: xs(:,:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_covrl_restrr2
    subroutine  psi_zovrl_restrr1(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      complex(psb_dpk_), intent(inout)  :: x(:)
      complex(psb_dpk_)                 :: xs(:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_zovrl_restrr1
    subroutine  psi_zovrl_restrr2(x,xs,desc_a,info)
      use psb_const_mod
      use psb_descriptor_type, only: psb_desc_type
      complex(psb_dpk_), intent(inout)  :: x(:,:)
      complex(psb_dpk_)                 :: xs(:,:)
      type(psb_desc_type), intent(in)  :: desc_a
      integer, intent(out)             :: info
    end subroutine psi_zovrl_restrr2
  end interface

  interface 
    subroutine psi_bld_ovr_mst(me,ovrlap_elem,mst_idx,info)
      integer, intent(in)               :: me, ovrlap_elem(:,:)
      integer, allocatable, intent(out) :: mst_idx(:) 
      integer, intent(out)              :: info
    end subroutine psi_bld_ovr_mst
  end interface
  
end module psi_mod