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diff --git a/src/gpu-compute/vector_register_file.hh b/src/gpu-compute/vector_register_file.hh
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+++ b/src/gpu-compute/vector_register_file.hh
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+/*
+ * Copyright (c) 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: John Kalamatianos
+ */
+
+#ifndef __VECTOR_REGISTER_FILE_HH__
+#define __VECTOR_REGISTER_FILE_HH__
+
+#include <list>
+
+#include "base/statistics.hh"
+#include "base/types.hh"
+#include "gpu-compute/vector_register_state.hh"
+#include "sim/sim_object.hh"
+
+class ComputeUnit;
+class Shader;
+class SimplePoolManager;
+class Wavefront;
+
+struct VectorRegisterFileParams;
+
+enum class VrfAccessType : uint8_t
+{
+    READ = 0x01,
+    WRITE = 0x02,
+    RD_WR = READ | WRITE
+};
+
+// Vector Register File
+class VectorRegisterFile : public SimObject
+{
+  public:
+    VectorRegisterFile(const VectorRegisterFileParams *p);
+
+    void setParent(ComputeUnit *_computeUnit);
+
+    // Read a register
+    template<typename T>
+    T
+    read(int regIdx, int threadId=0)
+    {
+        T p0 = vgprState->read<T>(regIdx, threadId);
+
+        return p0;
+    }
+
+    // Write a register
+    template<typename T>
+    void
+    write(int regIdx, T value, int threadId=0)
+    {
+        vgprState->write<T>(regIdx, value, threadId);
+    }
+
+    uint8_t regBusy(int idx, uint32_t operandSize) const;
+    uint8_t regNxtBusy(int idx, uint32_t operandSize) const;
+
+    int numRegs() const { return numRegsPerSimd; }
+
+    void markReg(int regIdx, uint32_t operandSize, uint8_t value);
+    void preMarkReg(int regIdx, uint32_t operandSize, uint8_t value);
+
+    virtual void exec(GPUDynInstPtr ii, Wavefront *w);
+
+    virtual int exec(uint64_t dynamic_id, Wavefront *w,
+                     std::vector<uint32_t> &regVec, uint32_t operandSize,
+                     uint64_t timestamp);
+
+    bool operandsReady(Wavefront *w, GPUDynInstPtr ii) const;
+    virtual void updateEvents() { }
+    virtual void updateResources(Wavefront *w, GPUDynInstPtr ii);
+
+    virtual bool
+    isReadConflict(int memWfId, int exeWfId) const
+    {
+        return false;
+    }
+
+    virtual bool
+    isWriteConflict(int memWfId, int exeWfId) const
+    {
+        return false;
+    }
+
+    virtual bool vrfOperandAccessReady(uint64_t dynamic_id, Wavefront *w,
+                                       GPUDynInstPtr ii,
+                                       VrfAccessType accessType);
+
+    virtual bool vrfOperandAccessReady(Wavefront *w, GPUDynInstPtr ii,
+                                       VrfAccessType accessType);
+
+    SimplePoolManager *manager;
+
+  protected:
+    ComputeUnit* computeUnit;
+    int simdId;
+
+    // flag indicating if a register is busy
+    std::vector<uint8_t> busy;
+    // flag indicating if a register will be busy (by instructions
+    // in the SIMD pipeline)
+    std::vector<uint8_t> nxtBusy;
+
+    // numer of registers (bank size) per simd unit (bank)
+    int numRegsPerSimd;
+
+    // vector register state
+    VecRegisterState *vgprState;
+};
+
+#endif // __VECTOR_REGISTER_FILE_HH__