mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:51:15 +08:00
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
|
/* 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)
|