ext/dsent/model/timing_graph/ElectricalNet.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/ElectricalNet.h"
  24 #include "model/timing_graph/ElectricalLoad.h"
  25
  26 namespace DSENT
  27 {
  28     //-------------------------------------------------------------------------
  29     // Electrical Net
  30     //-------------------------------------------------------------------------
  31
  32     ElectricalNet::ElectricalNet(const String& instance_name_, ElectricalModel* model_)
  33         : ElectricalTimingNode(instance_name_, model_), m_distributed_res_(0), m_distributed_cap_(0)
  34     {
  35
  36     }
  37
  38     ElectricalNet::~ElectricalNet()
  39     {
  40
  41     }
  42
  43     double ElectricalNet::calculateDelay() const
  44     {
  45         // Remember that this is a pi model, delay is distributed cap * distributed_res / 2 +
  46         // distributed res * (other downstream caps)
  47         return 0.693 * (getTotalDownstreamCap() - m_distributed_cap_ / 2) * m_distributed_res_;
  48     }
  49
  50     double ElectricalNet::calculateTransition() const
  51     {
  52         return 1.386 * getMaxUpstreamRes() * (m_distributed_cap_ * 0.2 + ElectricalTimingNode::getTotalDownstreamCap());
  53     }
  54
  55     double ElectricalNet::getMaxUpstreamRes() const
  56     {
  57         return m_distributed_res_ + ElectricalTimingNode::getMaxUpstreamRes();
  58     }
  59
  60     double ElectricalNet::getTotalDownstreamCap() const
  61     {
  62         return m_distributed_cap_ + ElectricalTimingNode::getTotalDownstreamCap();
  63     }
  64
  65     void ElectricalNet::setDistributedCap(double distributed_cap_)
  66     {
  67         m_distributed_cap_ = distributed_cap_;
  68         return;
  69     }
  70
  71     void ElectricalNet::setDistributedRes(double distributed_res_)
  72     {
  73         m_distributed_res_ = distributed_res_;
  74         return;
  75     }
  76
  77     double ElectricalNet::getDistributedCap() const
  78     {
  79         return m_distributed_cap_;
  80     }
  81
  82     double ElectricalNet::getDistributedRes() const
  83     {
  84         return m_distributed_res_;
  85     }
  86
  87     bool ElectricalNet::isNet() const
  88     {
  89         return true;
  90     }
  91
  92 } // namespace DSENT
  93
  94