/* This file is part of GNU epsilon, a functional language implementation

Copyright (C) 2003 Luca Saiu
Copyright (C) 2003 Matteo Golfarini

GNU epsilon is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2, or (at your
option) any later version.

GNU epsilon 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
General Public License for more details.

You should have received a copy of the GNU General Public License
along with epsilon; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */


/* Code for the popfn instruction */

/* Destroy the frame, reducing undertop_stack_pointer: */
undertop_stack_pointer = frame_pointer - 2;

/* top has remained the same, but we want to return *nothing*: */
top = stack[frame_pointer - 1];

/* Revert to the old env and FP: */
environment = stack[frame_pointer];
frame_pointer = (integer_t)(stack[frame_pointer + 1]);
