psblas3/base/comm/internals/psi_zovrl_restr_a.f90

!   
!                Parallel Sparse BLAS  version 3.5
!      (C) Copyright 2006-2018
!        Salvatore Filippone    
!        Alfredo Buttari      
!   
!    Redistribution and use in source and binary forms, with or without
!    modification, are permitted provided that the following conditions
!    are met:
!      1. Redistributions of source code must retain the above copyright
!         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
!         not be used to endorse or promote products derived from this
!         software without specific written permission.
!   
!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
!    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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!   
!
! Subroutine: psi_zovrl_restr
!   These subroutines restore the overlap region of a vector; they are  used
!   for the transpose  matrix-vector product when there is a nonempty overlap.
!                                              
!    
subroutine  psi_zovrl_restrr1(x,xs,desc_a,info)
  use psi_mod, psi_protect_name =>   psi_zovrl_restrr1

  implicit none

  complex(psb_dpk_), intent(inout)  :: x(:)
  complex(psb_dpk_)                 :: xs(:)
  type(psb_desc_type), intent(in)  :: desc_a
  integer(psb_ipk_), intent(out)             :: info

  ! locals
  type(psb_ctxt_type) :: ctxt
  integer(psb_ipk_) :: np, me, err_act, i, idx, isz
  character(len=20) :: name, ch_err

  name='psi_zovrl_restrr1'
  info = psb_success_
  call psb_erractionsave(err_act)
  if  (psb_errstatus_fatal()) then
    info = psb_err_internal_error_ ;    goto 9999
  end if
  ctxt = desc_a%get_context()
  call psb_info(ctxt, me, np)
  if (np == -1) then
    info = psb_err_context_error_
    call psb_errpush(info,name)
    goto 9999
  endif

  isz = size(desc_a%ovrlap_elem,1)

  do i=1, isz
    idx    = desc_a%ovrlap_elem(i,1)
    x(idx) = xs(i) 
  end do

  call psb_erractionrestore(err_act)
  return  

9999 call psb_error_handler(ctxt,err_act)

  return
end subroutine psi_zovrl_restrr1

subroutine  psi_zovrl_restrr2(x,xs,desc_a,info)
  use psi_mod, psi_protect_name =>   psi_zovrl_restrr2

  implicit none

  complex(psb_dpk_), intent(inout)  :: x(:,:)
  complex(psb_dpk_)                 :: xs(:,:)
  type(psb_desc_type), intent(in)  :: desc_a
  integer(psb_ipk_), intent(out)             :: info

  ! locals
  type(psb_ctxt_type) :: ctxt
  integer(psb_ipk_) :: np, me, err_act, i, idx, isz
  character(len=20) :: name, ch_err

  name='psi_zovrl_restrr2'
  info = psb_success_
  call psb_erractionsave(err_act)
  if  (psb_errstatus_fatal()) then
    info = psb_err_internal_error_ ;    goto 9999
  end if
  ctxt = desc_a%get_context()
  call psb_info(ctxt, me, np)
  if (np == -1) then
    info = psb_err_context_error_
    call psb_errpush(info,name)
    goto 9999
  endif

  if (size(x,2) /= size(xs,2)) then 
    info = psb_err_internal_error_
    call psb_errpush(info,name, a_err='Mismacth columns X vs XS')
    goto 9999
  endif


  isz = size(desc_a%ovrlap_elem,1)

  do i=1, isz
    idx      = desc_a%ovrlap_elem(i,1)
    x(idx,:) = xs(i,:) 
  end do

  call psb_erractionrestore(err_act)
  return  

9999 call psb_error_handler(ctxt,err_act)

  return
end subroutine psi_zovrl_restrr2