ext: add the source code for DSENT

This patch adds a tool called DSENT to the ext/ directory.  DSENT
is a tool that models power and area for on-chip networks.  The next
patch adds a script for using the tool.

1 files changed, 63 insertions, 0 deletions

diff --git a/ext/dsent/model/std_cells/StdCellLib.h b/ext/dsent/model/std_cells/StdCellLib.h
new file mode 100644
index 000000000..74c09149e
--- /dev/null
+++ b/ext/dsent/model/std_cells/StdCellLib.h
@@ -0,0 +1,63 @@
+#ifndef __DSENT_MODEL_STD_CELLS_STDCELLLIBS_H__
+#define __DSENT_MODEL_STD_CELLS_STDCELLLIBS_H__
+
+#include "util/CommonType.h"
+
+namespace DSENT
+{
+    class TechModel;
+    class StdCell;
+    class LibertyFile;
+
+    class StdCellLib
+    {
+        public:
+            StdCellLib(TechModel* tech_model_);
+            ~StdCellLib();
+
+        public:
+            // Get the technology model pointer
+            const TechModel* getTechModel() const;
+            // Create a standard cell by name and instance name
+            StdCell* createStdCell(const String& std_cell_name_, const String& instance_name_) const;
+
+            // Get PMOS to NMOS ratio
+            double getPToNRatio() const;
+            void setPToNRatio(double p_to_n_ratio_);
+            // Get height of the standard cell taken by active transistors
+            double getActiveHeight() const;
+            void setActiveHeight(double active_height_);
+            // Get total height of the standard cell including overheads
+            double getTotalHeight() const;
+            void setTotalHeight(double total_height_);
+            // Get the standard cell library cache of values
+            Map<double>* getStdCellCache() const;
+            // Create a list of standard cells
+            void createLib();
+
+            // Return a copy of this instance
+            StdCellLib* clone() const;            
+            
+        private:
+            // Disabled copy constructor. Use clone to perform copy operation
+            StdCellLib(const StdCellLib& std_cell_lib_);
+            // Generate driving strength string
+            const String genDrivingStrengthString(const vector<double>& driving_strength_) const;
+
+        private:
+            // Technology model pointer
+            TechModel* m_tech_model_;
+            // The PMOS to NMOS ratio
+            double m_p_to_n_ratio_;
+            // The height of the standard cell taken by active transitors
+            double m_active_height_;
+            // The total height of the standard cell including overheads
+            double m_total_height_;
+            // Std cell values cache
+            Map<double>* m_std_cell_cache_;
+            
+    }; // class StdCellLib
+} // namespace DSENT
+
+#endif // __DSENT_MODEL_STD_CELLS_STDCELLLIBS_H__
+