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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 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)