ext/dsent/model/timing_graph/ElectricalDriver.cc

   1 /* Copyright (c) 2012 Massachusetts Institute of Technology
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining a copy
   4  * of this software and associated documentation files (the "Software"), to deal
   5  * in the Software without restriction, including without limitation the rights
   6  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   7  * copies of the Software, and to permit persons to whom the Software is
   8  * furnished to do so, subject to the following conditions:
   9  *
  10  * The above copyright notice and this permission notice shall be included in
  11  * all copies or substantial portions of the Software.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  17  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  18  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  19  * THE SOFTWARE.
  20  */
  21
  22
  23 #include "model/timing_graph/ElectricalDriver.h"
  24 #include "model/timing_graph/ElectricalNet.h"
  25 #include "model/ElectricalModel.h"
  26
  27 namespace DSENT
  28 {
  29     ElectricalDriver::ElectricalDriver(const String& instance_name_, ElectricalModel* model_, bool sizable_)
  30         : ElectricalTimingNode(instance_name_, model_), m_output_res_(0.0), m_sizable_(sizable_)
  31     {
  32
  33     }
  34
  35     ElectricalDriver::~ElectricalDriver()
  36     {
  37
  38     }
  39
  40     void ElectricalDriver::setOutputRes(double output_res_)
  41     {
  42         m_output_res_ = output_res_;
  43         return;
  44     }
  45
  46     double ElectricalDriver::getOutputRes() const
  47     {
  48         return m_output_res_;
  49     }
  50
  51     double ElectricalDriver::calculateDelay() const
  52     {
  53         return 0.693 * m_output_res_ * getTotalDownstreamCap();
  54     }
  55
  56     double ElectricalDriver::calculateTransition() const
  57     {
  58         return 1.386 * getMaxUpstreamRes() * getTotalDownstreamCap();
  59     }
  60
  61     double ElectricalDriver::getMaxUpstreamRes() const
  62     {
  63         return m_output_res_;
  64     }
  65
  66     bool ElectricalDriver::isSizable() const
  67     {
  68         return m_sizable_;
  69     }
  70
  71     bool ElectricalDriver::hasMaxDrivingStrength() const
  72     {
  73         if (!isSizable())
  74         {
  75             return true;
  76         }
  77         return (getModel() == NULL) || (getModel()->hasMaxDrivingStrength());
  78     }
  79
  80     bool ElectricalDriver::hasMinDrivingStrength() const
  81     {
  82         if (!isSizable())
  83         {
  84             return true;
  85         }
  86         return (getModel() == NULL) || (getModel()->hasMinDrivingStrength());
  87     }
  88
  89     void ElectricalDriver::increaseDrivingStrength()
  90     {
  91         ASSERT(isSizable(), "[Error] " + getInstanceName() +
  92             " -> Attempted to size up unsizable driver!");
  93         if(!hasMaxDrivingStrength())
  94         {
  95             getModel()->increaseDrivingStrength();
  96         }
  97         return;
  98     }
  99
 100     void ElectricalDriver::decreaseDrivingStrength()
 101     {
 102         ASSERT(isSizable(), "[Error] " + getInstanceName() +
 103             " -> Attempted to size down unsizable driver!");
 104         if(!hasMinDrivingStrength())
 105         {
 106             getModel()->decreaseDrivingStrength();
 107         }
 108         return;
 109     }
 110
 111     bool ElectricalDriver::isDriver() const
 112     {
 113         return true;
 114     }
 115 } // namespace DSENT
 116