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diff --git a/HST-S/baselines/gpu/kernel.h b/HST-S/baselines/gpu/kernel.h
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+/*
+ * Copyright (c) 2016 University of Cordoba and University of Illinois
+ * All rights reserved.
+ *
+ * Developed by:    IMPACT Research Group
+ *                  University of Cordoba and University of Illinois
+ *                  http://impact.crhc.illinois.edu/
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * with the Software without restriction, including without limitation the 
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ *      > Redistributions of source code must retain the above copyright notice,
+ *        this list of conditions and the following disclaimers.
+ *      > Redistributions in binary form must reproduce the above copyright
+ *        notice, this list of conditions and the following disclaimers in the
+ *        documentation and/or other materials provided with the distribution.
+ *      > Neither the names of IMPACT Research Group, University of Cordoba, 
+ *        University of Illinois nor the names of its contributors may be used 
+ *        to endorse or promote products derived from this Software without 
+ *        specific prior written permission.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+ * CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH
+ * THE SOFTWARE.
+ *
+ */
+
+#include <cuda_runtime.h>
+#include <atomic>
+#include "support/common.h"
+
+void run_cpu_threads(std::atomic_uint *histo, unsigned int *data, int size, int bins, int num_threads, int chunk, int n_tasks, float alpha
+#ifdef CUDA_8_0
+    , std::atomic_int *wl
+#endif
+    );
+
+cudaError_t call_Histogram_kernel(int blocks, int threads, int size, int bins, int n_tasks, float alpha, 
+    unsigned int *data, unsigned int *histo, int l_mem_size
+#ifdef CUDA_8_0
+    , int* worklist
+#endif
+		);