ElectricalDriver.cc revision 10448
110448Snilay@cs.wisc.edu/* Copyright (c) 2012 Massachusetts Institute of Technology
210448Snilay@cs.wisc.edu *
310448Snilay@cs.wisc.edu * Permission is hereby granted, free of charge, to any person obtaining a copy
410448Snilay@cs.wisc.edu * of this software and associated documentation files (the "Software"), to deal
510448Snilay@cs.wisc.edu * in the Software without restriction, including without limitation the rights
610448Snilay@cs.wisc.edu * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
710448Snilay@cs.wisc.edu * copies of the Software, and to permit persons to whom the Software is
810448Snilay@cs.wisc.edu * furnished to do so, subject to the following conditions:
910448Snilay@cs.wisc.edu *
1010448Snilay@cs.wisc.edu * The above copyright notice and this permission notice shall be included in
1110448Snilay@cs.wisc.edu * all copies or substantial portions of the Software.
1210448Snilay@cs.wisc.edu *
1310448Snilay@cs.wisc.edu * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
1410448Snilay@cs.wisc.edu * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
1510448Snilay@cs.wisc.edu * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
1610448Snilay@cs.wisc.edu * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
1710448Snilay@cs.wisc.edu * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
1810448Snilay@cs.wisc.edu * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
1910448Snilay@cs.wisc.edu * THE SOFTWARE.
2010448Snilay@cs.wisc.edu */
2110448Snilay@cs.wisc.edu
2210447Snilay@cs.wisc.edu
2310447Snilay@cs.wisc.edu#include "model/timing_graph/ElectricalDriver.h"
2410447Snilay@cs.wisc.edu#include "model/timing_graph/ElectricalNet.h"
2510447Snilay@cs.wisc.edu#include "model/ElectricalModel.h"
2610447Snilay@cs.wisc.edu
2710447Snilay@cs.wisc.edunamespace DSENT
2810447Snilay@cs.wisc.edu{
2910447Snilay@cs.wisc.edu    ElectricalDriver::ElectricalDriver(const String& instance_name_, ElectricalModel* model_, bool sizable_)
3010447Snilay@cs.wisc.edu        : ElectricalTimingNode(instance_name_, model_), m_output_res_(0.0), m_sizable_(sizable_)
3110447Snilay@cs.wisc.edu    {
3210447Snilay@cs.wisc.edu
3310447Snilay@cs.wisc.edu    }
3410447Snilay@cs.wisc.edu
3510447Snilay@cs.wisc.edu    ElectricalDriver::~ElectricalDriver()
3610447Snilay@cs.wisc.edu    {
3710447Snilay@cs.wisc.edu
3810447Snilay@cs.wisc.edu    }
3910447Snilay@cs.wisc.edu
4010447Snilay@cs.wisc.edu    void ElectricalDriver::setOutputRes(double output_res_)
4110447Snilay@cs.wisc.edu    {
4210447Snilay@cs.wisc.edu        m_output_res_ = output_res_;
4310447Snilay@cs.wisc.edu        return;
4410447Snilay@cs.wisc.edu    }
4510447Snilay@cs.wisc.edu
4610447Snilay@cs.wisc.edu    double ElectricalDriver::getOutputRes() const
4710447Snilay@cs.wisc.edu    {
4810447Snilay@cs.wisc.edu        return m_output_res_;
4910447Snilay@cs.wisc.edu    }
5010447Snilay@cs.wisc.edu
5110447Snilay@cs.wisc.edu    double ElectricalDriver::calculateDelay() const
5210447Snilay@cs.wisc.edu    {
5310447Snilay@cs.wisc.edu        return 0.693 * m_output_res_ * getTotalDownstreamCap();
5410447Snilay@cs.wisc.edu    }
5510447Snilay@cs.wisc.edu
5610447Snilay@cs.wisc.edu    double ElectricalDriver::calculateTransition() const
5710447Snilay@cs.wisc.edu    {
5810447Snilay@cs.wisc.edu        return 1.386 * getMaxUpstreamRes() * getTotalDownstreamCap();
5910447Snilay@cs.wisc.edu    }
6010447Snilay@cs.wisc.edu
6110447Snilay@cs.wisc.edu    double ElectricalDriver::getMaxUpstreamRes() const
6210447Snilay@cs.wisc.edu    {
6310447Snilay@cs.wisc.edu        return m_output_res_;
6410447Snilay@cs.wisc.edu    }
6510447Snilay@cs.wisc.edu
6610447Snilay@cs.wisc.edu    bool ElectricalDriver::isSizable() const
6710447Snilay@cs.wisc.edu    {
6810447Snilay@cs.wisc.edu        return m_sizable_;
6910447Snilay@cs.wisc.edu    }
7010447Snilay@cs.wisc.edu
7110447Snilay@cs.wisc.edu    bool ElectricalDriver::hasMaxDrivingStrength() const
7210447Snilay@cs.wisc.edu    {
7310447Snilay@cs.wisc.edu        if (!isSizable())
7410447Snilay@cs.wisc.edu        {
7510447Snilay@cs.wisc.edu            return true;
7610447Snilay@cs.wisc.edu        }
7710447Snilay@cs.wisc.edu        return (getModel() == NULL) || (getModel()->hasMaxDrivingStrength());
7810447Snilay@cs.wisc.edu    }
7910447Snilay@cs.wisc.edu
8010447Snilay@cs.wisc.edu    bool ElectricalDriver::hasMinDrivingStrength() const
8110447Snilay@cs.wisc.edu    {
8210447Snilay@cs.wisc.edu        if (!isSizable())
8310447Snilay@cs.wisc.edu        {
8410447Snilay@cs.wisc.edu            return true;
8510447Snilay@cs.wisc.edu        }
8610447Snilay@cs.wisc.edu        return (getModel() == NULL) || (getModel()->hasMinDrivingStrength());
8710447Snilay@cs.wisc.edu    }
8810447Snilay@cs.wisc.edu
8910447Snilay@cs.wisc.edu    void ElectricalDriver::increaseDrivingStrength()
9010447Snilay@cs.wisc.edu    {
9110447Snilay@cs.wisc.edu        ASSERT(isSizable(), "[Error] " + getInstanceName() +
9210447Snilay@cs.wisc.edu            " -> Attempted to size up unsizable driver!");
9310447Snilay@cs.wisc.edu        if(!hasMaxDrivingStrength())
9410447Snilay@cs.wisc.edu        {
9510447Snilay@cs.wisc.edu            getModel()->increaseDrivingStrength();
9610447Snilay@cs.wisc.edu        }
9710447Snilay@cs.wisc.edu        return;
9810447Snilay@cs.wisc.edu    }
9910447Snilay@cs.wisc.edu
10010447Snilay@cs.wisc.edu    void ElectricalDriver::decreaseDrivingStrength()
10110447Snilay@cs.wisc.edu    {
10210447Snilay@cs.wisc.edu        ASSERT(isSizable(), "[Error] " + getInstanceName() +
10310447Snilay@cs.wisc.edu            " -> Attempted to size down unsizable driver!");
10410447Snilay@cs.wisc.edu        if(!hasMinDrivingStrength())
10510447Snilay@cs.wisc.edu        {
10610447Snilay@cs.wisc.edu            getModel()->decreaseDrivingStrength();
10710447Snilay@cs.wisc.edu        }
10810447Snilay@cs.wisc.edu        return;
10910447Snilay@cs.wisc.edu    }
11010447Snilay@cs.wisc.edu
11110447Snilay@cs.wisc.edu    bool ElectricalDriver::isDriver() const
11210447Snilay@cs.wisc.edu    {
11310447Snilay@cs.wisc.edu        return true;
11410447Snilay@cs.wisc.edu    }
11510447Snilay@cs.wisc.edu} // namespace DSENT
11610447Snilay@cs.wisc.edu
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