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+/*
+ * Copyright (c) 2006 The Regents of The University of Michigan
+ * Copyright (c) 2007-2008 The Florida State University
+ * Copyright (c) 2009 The University of Edinburgh
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ * Stephen Hines
+ * Timothy M. Jones
+ */
+
+#ifndef __ARCH_ARM_PREDECODER_HH__
+#define __ARCH_ARM_PREDECODER_HH__
+
+#include "arch/power/types.hh"
+#include "base/misc.hh"
+#include "base/types.hh"
+
+class ThreadContext;
+
+namespace PowerISA
+{
+
+class Predecoder
+{
+ protected:
+ ThreadContext * tc;
+
+ // The extended machine instruction being generated
+ ExtMachInst emi;
+
+ public:
+ Predecoder(ThreadContext * _tc)
+ : tc(_tc)
+ {
+ }
+
+ ThreadContext *
+ getTC()
+ {
+ return tc;
+ }
+
+ void
+ setTC(ThreadContext * _tc)
+ {
+ tc = _tc;
+ }
+
+ void
+ process()
+ {
+ }
+
+ void
+ reset()
+ {
+ }
+
+ // Use this to give data to the predecoder. This should be used
+ // when there is control flow.
+ void
+ moreBytes(Addr pc, Addr fetchPC, MachInst inst)
+ {
+ emi = inst;
+ }
+
+ // Use this to give data to the predecoder. This should be used
+ // when instructions are executed in order.
+ void
+ moreBytes(MachInst machInst)
+ {
+ moreBytes(0, 0, machInst);
+ }
+
+ bool
+ needMoreBytes()
+ {
+ return true;
+ }
+
+ bool
+ extMachInstReady()
+ {
+ return true;
+ }
+
+ // This returns a constant reference to the ExtMachInst to avoid a copy
+ const ExtMachInst &
+ getExtMachInst()
+ {
+ return emi;
+ }
+};
+
+} // PowerISA namespace
+
+#endif // __ARCH_POWER_PREDECODER_HH__