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diff --git a/src/arch/x86/isa.hh b/src/arch/x86/isa.hh
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+/*
+ * Copyright (c) 2009 The Regents of The University of Michigan
+ * 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
+ */
+
+#ifndef __ARCH_X86_ISA_HH__
+#define __ARCH_X86_ISA_HH__
+
+#include "arch/x86/miscregs.hh"
+#include "arch/x86/registers.hh"
+#include "base/types.hh"
+
+#include <string>
+#include <iostream>
+
+class Checkpoint;
+class EventManager;
+class ThreadContext;
+
+namespace X86ISA
+{
+    class ISA
+    {
+      protected:
+        MiscReg regVal[NUM_MISCREGS];
+        void updateHandyM5Reg(Efer efer, CR0 cr0,
+                SegAttr csAttr, SegAttr ssAttr, RFLAGS rflags);
+
+      public:
+        void clear();
+
+        ISA()
+        {
+            clear();
+        }
+
+        MiscReg readMiscRegNoEffect(int miscReg);
+        MiscReg readMiscReg(int miscReg, ThreadContext *tc);
+
+        void setMiscRegNoEffect(int miscReg, MiscReg val);
+        void setMiscReg(int miscReg, MiscReg val, ThreadContext *tc);
+
+        int flattenIntIndex(int reg);
+        int flattenFloatIndex(int reg);
+
+        void serialize(EventManager *em, std::ostream &os);
+        void unserialize(EventManager *em, Checkpoint *cp,
+                const std::string &section);
+    };
+}
+
+#endif