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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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