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.
237 lines
9.1 KiB
C++
237 lines
9.1 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/BUF.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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BUF::BUF(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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BUF::~BUF()
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{}
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void BUF::initProperties()
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{
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return;
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}
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void BUF::constructModel()
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{
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createInputPort("A");
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createOutputPort("Y");
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createLoad("A_Cap");
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createDelay("A_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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ElectricalDelay* a_to_y_delay = getDelay("A_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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a_cap->addDownstreamNode(a_to_y_delay);
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a_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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// Create OR Event Energy Result
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createElectricalEventAtomicResult("BUF");
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getEventInfo("Idle")->setStaticTransitionInfos();
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return;
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}
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void BUF::updateModel()
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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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const String& cell_name = "BUF_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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getDelay("A_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->A_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 BUF::evaluateModel()
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{
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return;
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}
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void BUF::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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// Stadard cell cache string
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const String& cell_name = "BUF_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 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") * (1 - P_A);
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leakage += cache->get(cell_name + "->Leakage->A") * P_A;
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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 BUFEvent 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("BUF")->setValue(energy_per_trans_01 * Y_num_trans_01);
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return;
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}
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void BUF::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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getOutputPort("Y")->setTransitionInfo(trans_A);
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return;
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}
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// Creates the standard cell, characterizes and abstracts away the details
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void BUF::cacheStdCell(StdCellLib* cell_lib_, double drive_strength_)
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{
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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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// Stadard cell cache string
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const String& cell_name = "BUF_X" + (String) drive_strength_;
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Log::printLine("=== " + cell_name + " ===");
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// Now actually build the full standard cell model
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createInputPort("A");
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createOutputPort("Y");
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createNet("Y_b");
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// Adds macros
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CellMacros::addInverter(this, "INV0", false, true, "A", "Y_b");
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CellMacros::addInverter(this, "INV1", false, true, "Y_b", "Y");
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// Update macros
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CellMacros::updateInverter(this, "INV0", drive_strength_ * 0.367);
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CellMacros::updateInverter(this, "INV1", 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("INV0_GatePitches").toDouble();
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area += gate_pitch * getTotalHeight() * getGenProperties()->get("INV1_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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// Cache leakage power results (for every single signal combination)
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double leakage_0 = 0.0; // !A
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double leakage_1 = 0.0; // A
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leakage_0 += getGenProperties()->get("INV0_LeakagePower_0").toDouble();
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leakage_0 += getGenProperties()->get("INV1_LeakagePower_1").toDouble();
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leakage_1 += getGenProperties()->get("INV0_LeakagePower_1").toDouble();
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leakage_1 += getGenProperties()->get("INV1_LeakagePower_0").toDouble();
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cache->set(cell_name + "->Leakage->!A", leakage_0);
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cache->set(cell_name + "->Leakage->A", leakage_1);
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Log::printLine(cell_name + "->Leakage->!A=" + (String) leakage_0);
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Log::printLine(cell_name + "->Leakage->A=" + (String) leakage_1);
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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 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->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_Cap=" + (String) a_cap);
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Log::printLine(cell_name + "->Cap->Y_b_Cap=" + (String) y_b_cap);
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Log::printLine(cell_name + "->Cap->Y_Cap=" + (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("INV1_RonZN")->getOutputRes();
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double a_to_y_delay = getDriver("INV0_RonZN")->calculateDelay() +
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getDriver("INV1_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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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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// --------------------------------------------------------------------
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return;
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}
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} // namespace DSENT
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