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- /* 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)
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