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

Copyright (C) 2002 Luca Saiu

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 s_ret instruction */

/* The value to be returned is already in the top register. We just need
   to update undertop_stack_pointer, frame_pointer, environment and
   instruction_pointer */

/* Take saved status from the stack: */
integer_t saved_frame_pointer = (integer_t)(stack[frame_pointer]);
word_t* saved_environment = (word_t*)(stack[frame_pointer + 1]);
void* saved_instruction_pointer = (void*)(stack[frame_pointer + 2]);

/* Update status: */
environment = saved_environment;
undertop_stack_pointer = frame_pointer - 1;
frame_pointer = saved_frame_pointer;

GOTO_GENERIC(saved_instruction_pointer);
