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diff --git a/src/gpu-compute/misc.hh b/src/gpu-compute/misc.hh
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+/*
+ * Copyright (c) 2011-2015 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: Steve Reinhardt
+ */
+
+#ifndef __MISC_HH__
+#define __MISC_HH__
+
+#include <bitset>
+#include <memory>
+
+#include "base/misc.hh"
+
+class GPUDynInst;
+
+// wavefront size of the machine
+static const int VSZ = 64;
+
+/*
+ This check is necessary because std::bitset only provides conversion to
+ unsigned long or unsigned long long via to_ulong() or to_ullong(). there are
+ a few places in the code where to_ullong() is used, however if VSZ is larger
+ than a value the host can support then bitset will throw a runtime exception.
+
+ we should remove all use of to_long() or to_ullong() so we can have VSZ
+ greater than 64b, however until that is done this assert is required.
+ */
+static_assert(VSZ <= sizeof(unsigned long long) * 8,
+              "VSZ is larger than the host can support");
+
+typedef std::bitset<VSZ> VectorMask;
+typedef std::shared_ptr<GPUDynInst> GPUDynInstPtr;
+
+class WaitClass
+{
+  public:
+    WaitClass() : nxtAvail(0), lookAheadAvail(0), tcnt(0) { }
+    void init(uint64_t *_tcnt, uint32_t _numStages=0)
+    {
+        tcnt = _tcnt;
+        numStages = _numStages;
+    }
+
+    void set(uint32_t i)
+    {
+        fatal_if(nxtAvail > *tcnt,
+                 "Can't allocate resource because it is busy!!!");
+        nxtAvail = *tcnt + i;
+    }
+    void preset(uint32_t delay)
+    {
+        lookAheadAvail = std::max(lookAheadAvail, delay + (*tcnt) - numStages);
+    }
+    bool rdy() const { return *tcnt >= nxtAvail; }
+    bool prerdy() const { return *tcnt >= lookAheadAvail; }
+
+  private:
+    // timestamp indicating when resource will be available
+    uint64_t nxtAvail;
+    // timestamp indicating when resource will be available including
+    // pending uses of the resource (when there is a cycle gap between
+    // rdy() and set()
+    uint64_t lookAheadAvail;
+    // current timestamp
+    uint64_t *tcnt;
+    // number of stages between checking if a resource is ready and
+    // setting the resource's utilization
+    uint32_t numStages;
+};
+
+class Float16
+{
+  public:
+    uint16_t val;
+
+    Float16() { val = 0; }
+
+    Float16(const Float16 &x) : val(x.val) { }
+
+    Float16(float x)
+    {
+        uint32_t ai = *(uint32_t *)&x;
+
+        uint32_t s = (ai >> 31) & 0x1;
+        uint32_t exp = (ai >> 23) & 0xff;
+        uint32_t mant = (ai >> 0) & 0x7fffff;
+
+        if (exp == 0 || exp <= 0x70) {
+            exp = 0;
+            mant = 0;
+        } else if (exp == 0xff) {
+            exp = 0x1f;
+        } else if (exp >= 0x8f) {
+            exp = 0x1f;
+            mant = 0;
+        } else {
+            exp = exp - 0x7f + 0x0f;
+        }
+
+        mant = mant >> 13;
+
+        val = 0;
+        val |= (s << 15);
+        val |= (exp << 10);
+        val |= (mant << 0);
+    }
+
+    operator float() const
+    {
+        uint32_t s = (val >> 15) & 0x1;
+        uint32_t exp = (val >> 10) & 0x1f;
+        uint32_t mant = (val >> 0) & 0x3ff;
+
+        if (!exp) {
+            exp = 0;
+            mant = 0;
+        } else if (exp == 0x1f) {
+            exp = 0xff;
+        } else {
+            exp = exp - 0x0f + 0x7f;
+        }
+
+        uint32_t val1 = 0;
+        val1 |= (s << 31);
+        val1 |= (exp << 23);
+        val1 |= (mant << 13);
+
+        return *(float*)&val1;
+    }
+};
+
+#endif // __MISC_HH__