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diff --git a/ext/mcpat/cacti/subarray.h b/ext/mcpat/cacti/subarray.h
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+/*****************************************************************************
+ *                                McPAT/CACTI
+ *                      SOFTWARE LICENSE AGREEMENT
+ *            Copyright 2012 Hewlett-Packard Development Company, L.P.
+ *                          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 __SUBARRAY_H__
+#define __SUBARRAY_H__
+
+#include "area.h"
+#include "component.h"
+#include "parameter.h"
+
+using namespace std;
+
+
+class Subarray : public Component
+{
+  public:
+    Subarray(const DynamicParameter & dp, bool is_fa_);
+    ~Subarray();
+
+    const DynamicParameter & dp;
+    double  get_total_cell_area();
+    unsigned int num_rows;
+    unsigned int num_cols;
+    int32_t num_cols_fa_cam;
+    int32_t num_cols_fa_ram;
+    Area    cell, cam_cell;
+
+    bool    is_fa;
+    double  C_wl, C_wl_cam, C_wl_ram;
+    double  R_wl, R_wl_cam, R_wl_ram;
+    double  C_bl, C_bl_cam;
+  private:
+
+    void compute_C();  // compute bitline and wordline capacitance
+};
+
+
+
+#endif
+