| /* 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 3 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, see <http://www.gnu.org/licenses/>. |
| |
| */ |
| |
| |
| /* 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) |
