1 files changed, 106 insertions, 0 deletions
diff --git a/ext/dsent/model/electrical/RippleAdder.cc b/ext/dsent/model/electrical/RippleAdder.cc
new file mode 100644
index 000000000..779cd4798
--- /dev/null
+++ b/ext/dsent/model/electrical/RippleAdder.cc
@@ -0,0 +1,106 @@
+#include "model/electrical/RippleAdder.h"
+
+#include <cmath>
+
+#include "model/PortInfo.h"
+#include "model/TransitionInfo.h"
+#include "model/EventInfo.h"
+#include "model/std_cells/StdCell.h"
+#include "model/std_cells/StdCellLib.h"
+
+namespace DSENT
+{
+    RippleAdder::RippleAdder(const String& instance_name_, const TechModel* tech_model_)
+        : ElectricalModel(instance_name_, tech_model_)
+    {
+        initParameters();
+        initProperties();
+    }
+
+    RippleAdder::~RippleAdder()
+    {}
+
+    void RippleAdder::initParameters()
+    {
+        addParameterName("NumberBits");
+        return;
+    }
+
+    void RippleAdder::initProperties()
+    {
+        return;
+    }
+
+    void RippleAdder::constructModel()
+    {
+        // Get properties
+        unsigned int number_bits = (unsigned int) getParameter("NumberBits");
+
+        //Construct electrical ports and nets
+        createInputPort("CI");
+        createOutputPort("CO");
+        for(unsigned int i = 0; i < number_bits; ++i)
+        {
+            createInputPort("A" + String(i));
+            createInputPort("B" + String(i));
+            createOutputPort("S" + String(i));
+            createNet("C" + String(i));
+        }
+        createNet("C" + String(number_bits));
+
+        //Create energy, power, and area results
+        createElectricalResults();
+        getEventInfo("Idle")->setStaticTransitionInfos();
+        createElectricalEventResult("Add");
+        Result* add_event = getEventResult("Add");
+
+        // Connect all nets 
+        assign("C0", "CI");
+        assign("CO", "C" + String(number_bits));
+        for (unsigned int i = 0; i < number_bits; ++i)
+        {
+            String n = (String) i;            
+            StdCell* adder = getTechModel()->getStdCellLib()->createStdCell("ADDF", "ADDF_" + n);
+            adder->construct();
+
+            //Build electrical connectivity
+            portConnect(adder, "A", "A" + String(i));
+            portConnect(adder, "B", "B" + String(i));
+            portConnect(adder, "CI", "C" + String(i));
+            portConnect(adder, "S", "S" + String(i));
+            portConnect(adder, "CO", "C" + String(i + 1));
+
+            //Add ADDF instance, leakage power, energy, and add event results
+            addSubInstances(adder, 1.0);                        
+            addElectricalSubResults(adder, 1.0);
+            add_event->addSubResult(adder->getEventResult("ADDF"), "ADDF_" + n, 1.0);
+        }
+
+        return;
+    }
+
+    void RippleAdder::propagateTransitionInfo()
+    {
+        unsigned int number_bits = getParameter("NumberBits").toUInt();
+
+        TransitionInfo current_trans_CI = getInputPort("CI")->getTransitionInfo();
+        for(unsigned int i = 0; i < number_bits; ++i)
+        {
+            ElectricalModel* adder = (ElectricalModel*)getSubInstance("ADDF_" + String(i));
+
+            // Propagate input transition info
+            propagatePortTransitionInfo(adder, "A", "A" + String(i));
+            propagatePortTransitionInfo(adder, "B", "B" + String(i));
+            assignPortTransitionInfo(adder, "CI", current_trans_CI);
+            adder->use();
+
+            // Assign output transition info
+            propagatePortTransitionInfo("S" + String(i), adder, "S");
+            current_trans_CI = adder->getOutputPort("CO")->getTransitionInfo();
+        }
+        getOutputPort("CO")->setTransitionInfo(current_trans_CI);
+        return;
+    }
+
+} // namespace DSENT
+