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diff --git a/sim/moxie/sim-main.h b/sim/moxie/sim-main.h
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+/* Moxie Simulator definition.
+   Copyright (C) 2009
+   Free Software Foundation, Inc.
+   Contributed by Anthony Green <green@moxielogic.com>
+
+This file is part of GDB, the GNU debugger.
+
+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/>.  */
+
+#ifndef SIM_MAIN_H
+#define SIM_MAIN_H
+
+#define SIM_HAVE_BIENDIAN
+
+#include "sim-basics.h"
+
+typedef address_word sim_cia;
+
+#include "sim-base.h"
+#include "bfd.h"
+
+#define PCIDX 17
+
+struct _sim_cpu {
+
+  /* The following are internal simulator state variables: */
+#define CIA_GET(CPU) ((CPU)->registers[PCIDX] + 0)
+#define CIA_SET(CPU,CIA) ((CPU)->registers[PCIDX] = (CIA))
+
+/* To keep this default simulator simple, and fast, we use a direct
+   vector of registers. The internal simulator engine then uses
+   manifests to access the correct slot. */
+
+  unsigned_word registers[19];
+
+  sim_cpu_base base;
+};
+
+struct sim_state {
+
+  sim_cpu cpu[MAX_NR_PROCESSORS];
+#if (WITH_SMP)
+#define STATE_CPU(sd,n) (&(sd)->cpu[n])
+#else
+#define STATE_CPU(sd,n) (&(sd)->cpu[0])
+#endif
+
+  sim_state_base base;
+};
+
+#endif
+