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, 33 insertions, 0 deletions

diff --git a/ext/dsent/model/std_cells/NAND2.h b/ext/dsent/model/std_cells/NAND2.h
new file mode 100644
index 000000000..75a6436ce
--- /dev/null
+++ b/ext/dsent/model/std_cells/NAND2.h
@@ -0,0 +1,33 @@
+#ifndef __DSENT_MODEL_STD_CELLS_NAND2_H__
+#define __DSENT_MODEL_STD_CELLS_NAND2_H__
+
+#include "util/CommonType.h"
+#include "model/std_cells/StdCell.h"
+
+namespace DSENT
+{
+    class NAND2 : public StdCell
+    {
+        public:
+            NAND2(const String& instance_name_, const TechModel* tech_model_);
+            virtual ~NAND2();
+
+        public:
+            // Set a list of properties' name needed to construct model
+            void initProperties();
+
+            // Cache the standard cell
+            void cacheStdCell(StdCellLib* cell_lib_, double drive_strength_);
+            
+        protected:
+            // Build the model
+            virtual void constructModel();
+            virtual void updateModel();
+            virtual void useModel();
+            virtual void propagateTransitionInfo();
+            
+    }; // class NAND2
+} // namespace DSENT
+
+#endif // __DSENT_MODEL_STD_CELLS_NAND2_H__
+