/* This file is part of the program psim. Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au> This program 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 of the License, or (at your option) any later version. This program 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 this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* branch macro's: The macro's below implement the semantics of the PowerPC jump instructions. */ /* If so required, update the Link Register with the next sequential instruction address */ #define UPDATE_LK \ do { \ if (update_LK) { \ ppc_ia target = cia + 4; \ ppc_spr new_address = (ppc_spr)IEA_MASKED(ppc_is_64bit(processor), \ target); \ LR = new_address; \ } \ ITRACE(trace_branch, \ ("UPDATE_LK - update_LK=%d lr=0x%x cia=0x%x\n", \ update_LK, LR, cia); \ } while (0) /* take the branch - absolute or relative - possibly updating the link register */ #define BRANCH(ADDRESS) \ do { \ UPDATE_LK; \ if (update_AA) { \ ppc_ia target = (ppc_ia)(ADDRESS); \ nia = (ppc_ia)IEA_MASKED(ppc_is_64bit(processor), target); \ } \ else { \ ppc_ia target = cia + ADDRESS; \ nia = (ppc_ia)IEA_MASKED(ppc_is_64bit(processor), target); \ } \ PTRACE(trace_branch, \ ("BRANCH - update_AA=%d update_LK=%d nia=0x%x cia=0x%x\n", \ update_AA, update_LK, nia, cia); \ } while (0)