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+/*
+ * Copyright (c) 2004-2005 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.
+ */
+
+#ifndef __CPU_O3_CPU_2BIT_LOCAL_PRED_HH__
+#define __CPU_O3_CPU_2BIT_LOCAL_PRED_HH__
+
+// For Addr type.
+#include "arch/isa_traits.hh"
+#include "cpu/o3/sat_counter.hh"
+
+class DefaultBP
+{
+  public:
+    /**
+     * Default branch predictor constructor.
+     */
+    DefaultBP(unsigned localPredictorSize, unsigned localCtrBits,
+              unsigned instShiftAmt);
+
+    /**
+     * Looks up the given address in the branch predictor and returns
+     * a true/false value as to whether it is taken.
+     * @param branch_addr The address of the branch to look up.
+     * @return Whether or not the branch is taken.
+     */
+    bool lookup(Addr &branch_addr);
+
+    /**
+     * Updates the branch predictor with the actual result of a branch.
+     * @param branch_addr The address of the branch to update.
+     * @param taken Whether or not the branch was taken.
+     */
+    void update(Addr &branch_addr, bool taken);
+
+  private:
+
+    /** Returns the taken/not taken prediction given the value of the
+     *  counter.
+     */
+    inline bool getPrediction(uint8_t &count);
+
+    /** Calculates the local index based on the PC. */
+    inline unsigned getLocalIndex(Addr &PC);
+
+    /** Array of counters that make up the local predictor. */
+    SatCounter *localCtrs;
+
+    /** Size of the local predictor. */
+    unsigned localPredictorSize;
+
+    /** Number of bits of the local predictor's counters. */
+    unsigned localCtrBits;
+
+    /** Number of bits to shift the PC when calculating index. */
+    unsigned instShiftAmt;
+
+    /** Mask to get index bits. */
+    unsigned indexMask;
+};
+
+#endif // __CPU_O3_CPU_2BIT_LOCAL_PRED_HH__