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+/*
+ * Copyright (c) 2014-2015 Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * For use for simulation and test purposes only
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. 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.
+ *
+ * 3. Neither the name of the copyright holder 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 HOLDER 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.
+ *
+ * Author: Brad Beckmann, Sooraj Puthoor
+ */
+
+#ifndef __FETCH_UNIT_HH__
+#define __FETCH_UNIT_HH__
+
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "arch/gpu_decoder.hh"
+#include "base/statistics.hh"
+#include "config/the_gpu_isa.hh"
+#include "gpu-compute/scheduler.hh"
+#include "mem/packet.hh"
+
+class ComputeUnit;
+class Wavefront;
+
+class FetchUnit
+{
+  public:
+    FetchUnit(const ComputeUnitParams* params);
+    ~FetchUnit();
+    void init(ComputeUnit *cu);
+    void exec();
+    void bindWaveList(std::vector<Wavefront*> *list);
+    void initiateFetch(Wavefront *wavefront);
+    void fetch(PacketPtr pkt, Wavefront *wavefront);
+    void processFetchReturn(PacketPtr pkt);
+    static uint32_t globalFetchUnitID;
+
+  private:
+    bool timingSim;
+    ComputeUnit *computeUnit;
+    TheGpuISA::Decoder decoder;
+
+    // Fetch scheduler; Selects one wave from
+    // the fetch queue for instruction fetching.
+    // The selection is made according to
+    // a scheduling policy
+    Scheduler fetchScheduler;
+
+    // Stores the list of waves that are
+    // ready to be fetched this cycle
+    std::vector<Wavefront*> fetchQueue;
+
+    // Stores the fetch status of all waves dispatched to this SIMD.
+    // TRUE implies the wave is ready to fetch and is already
+    // moved to fetchQueue
+    std::vector<std::pair<Wavefront*, bool>> fetchStatusQueue;
+
+    // Pointer to list of waves dispatched on to this SIMD unit
+    std::vector<Wavefront*> *waveList;
+};
+
+#endif // __FETCH_UNIT_HH__