c1aecc05e6
This patch extensively modifies DSENT so that it can be accessed using Python. To access the Python interface, DSENT needs to compiled as a shared library. For this purpose a CMakeLists.txt file has been added. Some of the code that is not required is being removed.
293 lines
13 KiB
C++
293 lines
13 KiB
C++
/* Copyright (c) 2012 Massachusetts Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "model/std_cells/AND2.h"
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#include <cmath>
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#include "model/PortInfo.h"
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#include "model/TransitionInfo.h"
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#include "model/EventInfo.h"
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#include "model/std_cells/StdCellLib.h"
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#include "model/std_cells/CellMacros.h"
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#include "model/timing_graph/ElectricalNet.h"
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#include "model/timing_graph/ElectricalDriver.h"
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#include "model/timing_graph/ElectricalLoad.h"
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#include "model/timing_graph/ElectricalDelay.h"
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namespace DSENT
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{
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using std::max;
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AND2::AND2(const String& instance_name_, const TechModel* tech_model_)
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: StdCell(instance_name_, tech_model_)
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{
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initProperties();
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}
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AND2::~AND2()
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{}
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void AND2::initProperties()
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{
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return;
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}
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void AND2::constructModel()
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{
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// All constructModel should do is create Area/NDDPower/Energy Results as
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// well as instantiate any sub-instances using only the hard parameters
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createInputPort("A");
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createInputPort("B");
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createOutputPort("Y");
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createLoad("A_Cap");
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createLoad("B_Cap");
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createDelay("A_to_Y_delay");
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createDelay("B_to_Y_delay");
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createDriver("Y_Ron", true);
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ElectricalLoad* a_cap = getLoad("A_Cap");
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ElectricalLoad* b_cap = getLoad("B_Cap");
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ElectricalDelay* a_to_y_delay = getDelay("A_to_Y_delay");
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ElectricalDelay* b_to_y_delay = getDelay("B_to_Y_delay");
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ElectricalDriver* y_ron = getDriver("Y_Ron");
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getNet("A")->addDownstreamNode(a_cap);
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getNet("B")->addDownstreamNode(b_cap);
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a_cap->addDownstreamNode(a_to_y_delay);
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b_cap->addDownstreamNode(b_to_y_delay);
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a_to_y_delay->addDownstreamNode(y_ron);
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b_to_y_delay->addDownstreamNode(y_ron);
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y_ron->addDownstreamNode(getNet("Y"));
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// Create Area result
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// Create NDD Power result
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createElectricalAtomicResults();
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getEventInfo("Idle")->setStaticTransitionInfos();
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// Create AND Event Energy Result
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createElectricalEventAtomicResult("AND2");
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return;
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}
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void AND2::updateModel()
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{
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// All updateModel should do is calculate numbers for the Area/NDDPower/Energy
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// Results as anything else that needs to be done using either soft or hard parameters
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// Get parameters
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double drive_strength = getDrivingStrength();
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Map<double>* cache = getTechModel()->getStdCellLib()->getStdCellCache();
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// Standard cell cache string
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String cell_name = "AND2_X" + (String) drive_strength;
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// Get timing parameters
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getLoad("A_Cap")->setLoadCap(cache->get(cell_name + "->Cap->A"));
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getLoad("B_Cap")->setLoadCap(cache->get(cell_name + "->Cap->B"));
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getDelay("A_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->A_to_Y"));
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getDelay("B_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->B_to_Y"));
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getDriver("Y_Ron")->setOutputRes(cache->get(cell_name + "->DriveRes->Y"));
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// Set the cell area
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getAreaResult("Active")->setValue(cache->get(cell_name + "->ActiveArea"));
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getAreaResult("Metal1Wire")->setValue(cache->get(cell_name + "->ActiveArea"));
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return;
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}
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void AND2::evaluateModel()
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{
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return;
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}
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void AND2::useModel()
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{
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// Get parameters
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double drive_strength = getDrivingStrength();
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Map<double>* cache = getTechModel()->getStdCellLib()->getStdCellCache();
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// Standard cell cache string
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String cell_name = "AND2_X" + (String) drive_strength;
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// Propagate the transition info and get the 0->1 transtion count
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propagateTransitionInfo();
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double P_A = getInputPort("A")->getTransitionInfo().getProbability1();
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double P_B = getInputPort("B")->getTransitionInfo().getProbability1();
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double Y_num_trans_01 = getOutputPort("Y")->getTransitionInfo().getNumberTransitions01();
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// Calculate leakage
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double leakage = 0;
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leakage += cache->get(cell_name + "->Leakage->!A!B") * (1 - P_A) * (1 - P_B);
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leakage += cache->get(cell_name + "->Leakage->!AB") * (1 - P_A) * P_B;
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leakage += cache->get(cell_name + "->Leakage->A!B") * P_A * (1 - P_B);
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leakage += cache->get(cell_name + "->Leakage->AB") * P_A * P_B;
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getNddPowerResult("Leakage")->setValue(leakage);
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// Get VDD
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double vdd = getTechModel()->get("Vdd");
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// Get capacitances
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double y_b_cap = cache->get(cell_name + "->Cap->Y_b");
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double y_cap = cache->get(cell_name + "->Cap->Y");
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double y_load_cap = getNet("Y")->getTotalDownstreamCap();
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// Calculate AND2Event energy
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double energy_per_trans_01 = (y_b_cap + y_cap + y_load_cap) * vdd * vdd;
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getEventResult("AND2")->setValue(energy_per_trans_01 * Y_num_trans_01);
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return;
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}
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void AND2::propagateTransitionInfo()
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{
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// Get input signal transition info
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const TransitionInfo& trans_A = getInputPort("A")->getTransitionInfo();
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const TransitionInfo& trans_B = getInputPort("B")->getTransitionInfo();
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double max_freq_mult = max(trans_A.getFrequencyMultiplier(), trans_B.getFrequencyMultiplier());
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const TransitionInfo& scaled_trans_A = trans_A.scaleFrequencyMultiplier(max_freq_mult);
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const TransitionInfo& scaled_trans_B = trans_B.scaleFrequencyMultiplier(max_freq_mult);
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double A_prob_00 = scaled_trans_A.getNumberTransitions00() / max_freq_mult;
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double A_prob_01 = scaled_trans_A.getNumberTransitions01() / max_freq_mult;
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double A_prob_10 = A_prob_01;
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double A_prob_11 = scaled_trans_A.getNumberTransitions11() / max_freq_mult;
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double B_prob_00 = scaled_trans_B.getNumberTransitions00() / max_freq_mult;
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double B_prob_01 = scaled_trans_B.getNumberTransitions01() / max_freq_mult;
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double B_prob_10 = B_prob_01;
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double B_prob_11 = scaled_trans_B.getNumberTransitions11() / max_freq_mult;
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// Set output transition info
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double Y_prob_00 = A_prob_00 +
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A_prob_01 * (B_prob_00 + B_prob_10) +
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A_prob_10 * (B_prob_00 + B_prob_01) +
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A_prob_11 * B_prob_00;
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double Y_prob_01 = A_prob_01 * (B_prob_01 + B_prob_11) +
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A_prob_11 * B_prob_01;
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double Y_prob_11 = A_prob_11 * B_prob_11;
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// Check that probabilities add up to 1.0 with some finite tolerance
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ASSERT(LibUtil::Math::isEqual(Y_prob_00 + Y_prob_01 + Y_prob_01 + Y_prob_11, 1.0), "[Error] " + getInstanceName() +
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"Output transition probabilities must add up to 1 (" + (String) Y_prob_00 + ", " +
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(String) Y_prob_01 + ", " + (String) Y_prob_11 + ")!");
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// Turn probability of transitions per cycle into number of transitions per time unit
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TransitionInfo trans_Y(Y_prob_00 * max_freq_mult, Y_prob_01 * max_freq_mult, Y_prob_11 * max_freq_mult);
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getOutputPort("Y")->setTransitionInfo(trans_Y);
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return;
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}
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void AND2::cacheStdCell(StdCellLib* cell_lib_, double drive_strength_)
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{
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// Standard cell cache string
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String cell_name = "AND2_X" + (String) drive_strength_;
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Log::printLine("=== " + cell_name + " ===");
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// Get parameters
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double gate_pitch = cell_lib_->getTechModel()->get("Gate->PitchContacted");
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Map<double>* cache = cell_lib_->getStdCellCache();
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// Now actually build the full standard cell model
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// Create the two input ports
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createInputPort("A");
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createInputPort("B");
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createOutputPort("Y");
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createNet("Y_b");
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// Adds macros
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CellMacros::addNand2(this, "NAND2", false, true, true, "A", "B", "Y_b");
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CellMacros::addInverter(this, "INV", false, true, "Y_b", "Y");
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CellMacros::updateNand2(this, "NAND2", drive_strength_ * 0.5);
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CellMacros::updateInverter(this, "INV", drive_strength_ * 1.0);
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// Cache area result
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double area = 0.0;
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area += gate_pitch * getTotalHeight() * 1;
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area += gate_pitch * getTotalHeight() * getGenProperties()->get("NAND2_GatePitches").toDouble();
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area += gate_pitch * getTotalHeight() * getGenProperties()->get("INV_GatePitches").toDouble();
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cache->set(cell_name + "->ActiveArea", area);
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Log::printLine(cell_name + "->ActiveArea=" + (String) area);
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// --------------------------------------------------------------------
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// Leakage Model Calculation
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// --------------------------------------------------------------------
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double leakage_00 = getGenProperties()->get("NAND2_LeakagePower_00").toDouble() +
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getGenProperties()->get("INV_LeakagePower_0").toDouble();
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double leakage_01 = getGenProperties()->get("NAND2_LeakagePower_01").toDouble() +
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getGenProperties()->get("INV_LeakagePower_0").toDouble();
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double leakage_10 = getGenProperties()->get("NAND2_LeakagePower_10").toDouble() +
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getGenProperties()->get("INV_LeakagePower_0").toDouble();
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double leakage_11 = getGenProperties()->get("NAND2_LeakagePower_11").toDouble() +
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getGenProperties()->get("INV_LeakagePower_1").toDouble();
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cache->set(cell_name + "->Leakage->!A!B", leakage_00);
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cache->set(cell_name + "->Leakage->!AB", leakage_01);
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cache->set(cell_name + "->Leakage->A!B", leakage_10);
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cache->set(cell_name + "->Leakage->AB", leakage_11);
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Log::printLine(cell_name + "->Leakage->!A!B=" + (String) leakage_00);
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Log::printLine(cell_name + "->Leakage->!AB=" + (String) leakage_01);
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Log::printLine(cell_name + "->Leakage->A!B=" + (String) leakage_10);
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Log::printLine(cell_name + "->Leakage->AB=" + (String) leakage_11);
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// --------------------------------------------------------------------
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// --------------------------------------------------------------------
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// Get Node Capacitances
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// --------------------------------------------------------------------
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double a_cap = getNet("A")->getTotalDownstreamCap();
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double b_cap = getNet("B")->getTotalDownstreamCap();
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double y_b_cap = getNet("Y_b")->getTotalDownstreamCap();
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double y_cap = getNet("Y")->getTotalDownstreamCap();
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cache->set(cell_name + "->Cap->A", a_cap);
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cache->set(cell_name + "->Cap->B", b_cap);
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cache->set(cell_name + "->Cap->Y_b", y_b_cap);
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cache->set(cell_name + "->Cap->Y", y_cap);
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Log::printLine(cell_name + "->Cap->A=" + (String) a_cap);
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Log::printLine(cell_name + "->Cap->B=" + (String) b_cap);
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Log::printLine(cell_name + "->Cap->Y=" + (String) y_b_cap);
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Log::printLine(cell_name + "->Cap->Y=" + (String) y_cap);
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// --------------------------------------------------------------------
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// --------------------------------------------------------------------
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// Build Internal Delay Model
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// --------------------------------------------------------------------
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double y_ron = getDriver("INV_RonZN")->getOutputRes();
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double a_to_y_delay = getDriver("NAND2_RonZN")->calculateDelay() +
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getDriver("INV_RonZN")->calculateDelay();
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double b_to_y_delay = getDriver("NAND2_RonZN")->calculateDelay() +
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getDriver("INV_RonZN")->calculateDelay();
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cache->set(cell_name + "->DriveRes->Y", y_ron);
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cache->set(cell_name + "->Delay->A_to_Y", a_to_y_delay);
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cache->set(cell_name + "->Delay->B_to_Y", b_to_y_delay);
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Log::printLine(cell_name + "->DriveRes->Y=" + (String) y_ron);
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Log::printLine(cell_name + "->Delay->A_to_Y=" + (String) a_to_y_delay);
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Log::printLine(cell_name + "->Delay->B_to_Y=" + (String) b_to_y_delay);
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// --------------------------------------------------------------------
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return;
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}
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} // namespace DSENT
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