/* File:      ptoc_tag_xsb_i.h
** Author(s): Xu, Warren, Sagonas, Swift
** Contact:   xsb-contact@cs.sunysb.edu
** 
** Copyright (C) The Research Foundation of SUNY, 1986, 1993-1999
** Copyright (C) ECRC, Germany, 1990
** 
** XSB is free software; you can redistribute it and/or modify it under the
** terms of the GNU Library General Public License as published by the Free
** Software Foundation; either version 2 of the License, or (at your option)
** any later version.
** 
** XSB is distributed in the hope that it will be useful, but WITHOUT ANY
** WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
** FOR A PARTICULAR PURPOSE.  See the GNU Library General Public License for
** more details.
** 
** You should have received a copy of the GNU Library General Public License
** along with XSB; if not, write to the Free Software Foundation,
** Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
**
** $Id: ptoc_tag_xsb_i.h,v 1.2 2000/04/29 21:53:57 kifer Exp $
** 
*/



/*
 *  Returns the still-tagged value (a Cell) at the end of the deref chain
 *  leading from `regnum'.
 */
static inline Cell ptoc_tag(int regnum)
{
  /* reg is global array in register.h */
  register Cell addr = cell(reg+regnum);

  XSB_Deref(addr);
  return addr;
}
