ext/dsent/model/std_cells/MUX2.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 #include "model/std_cells/MUX2.h"
  23
  24 #include <cmath>
  25
  26 #include "model/PortInfo.h"
  27 #include "model/TransitionInfo.h"
  28 #include "model/EventInfo.h"
  29 #include "model/std_cells/StdCellLib.h"
  30 #include "model/std_cells/CellMacros.h"
  31 #include "model/timing_graph/ElectricalNet.h"
  32 #include "model/timing_graph/ElectricalDriver.h"
  33 #include "model/timing_graph/ElectricalLoad.h"
  34 #include "model/timing_graph/ElectricalDelay.h"
  35
  36 namespace DSENT
  37 {
  38     using std::ceil;
  39     using std::max;
  40
  41     MUX2::MUX2(const String& instance_name_, const TechModel* tech_model_)
  42         : StdCell(instance_name_, tech_model_)
  43     {
  44         initProperties();
  45     }
  46
  47     MUX2::~MUX2()
  48     {}
  49
  50     void MUX2::initProperties()
  51     {
  52         return;
  53     }
  54
  55     void MUX2::constructModel()
  56     {
  57         // All constructModel should do is create Area/NDDPower/Energy Results as
  58         // well as instantiate any sub-instances using only the hard parameters
  59
  60         createInputPort("A");
  61         createInputPort("B");
  62         createInputPort("S0");
  63         createOutputPort("Y");
  64
  65         createLoad("A_Cap");
  66         createLoad("B_Cap");
  67         createLoad("S0_Cap");
  68         createDelay("A_to_Y_delay");
  69         createDelay("B_to_Y_delay");
  70         createDelay("S0_to_Y_delay");
  71         createDriver("Y_Ron", true);
  72
  73         ElectricalLoad* a_cap = getLoad("A_Cap");
  74         ElectricalLoad* b_cap = getLoad("B_Cap");
  75         ElectricalLoad* s0_cap = getLoad("S0_Cap");
  76         ElectricalDelay* a_to_y_delay = getDelay("A_to_Y_delay");
  77         ElectricalDelay* b_to_y_delay = getDelay("B_to_Y_delay");
  78         ElectricalDelay* s0_to_y_delay = getDelay("S0_to_Y_delay");
  79         ElectricalDriver* y_ron = getDriver("Y_Ron");
  80
  81         getNet("A")->addDownstreamNode(a_cap);
  82         getNet("B")->addDownstreamNode(b_cap);
  83         getNet("S0")->addDownstreamNode(s0_cap);
  84         a_cap->addDownstreamNode(a_to_y_delay);
  85         b_cap->addDownstreamNode(b_to_y_delay);
  86         s0_cap->addDownstreamNode(s0_to_y_delay);
  87         a_to_y_delay->addDownstreamNode(y_ron);
  88         b_to_y_delay->addDownstreamNode(y_ron);
  89         s0_to_y_delay->addDownstreamNode(y_ron);
  90         y_ron->addDownstreamNode(getNet("Y"));
  91
  92         // Create Area result
  93         createElectricalAtomicResults();
  94         getEventInfo("Idle")->setStaticTransitionInfos();
  95         // Create MUX2 Event Energy Result
  96         createElectricalEventAtomicResult("MUX2");
  97
  98
  99         return;
 100     }
 101
 102     void MUX2::updateModel()
 103     {
 104         // Get parameters
 105         double drive_strength = getDrivingStrength();
 106         Map<double>* cache = getTechModel()->getStdCellLib()->getStdCellCache();
 107
 108         // Standard cell cache string
 109         String cell_name = "MUX2_X" + (String) drive_strength;
 110
 111         // Get timing parameters
 112         getLoad("A_Cap")->setLoadCap(cache->get(cell_name + "->Cap->A"));
 113         getLoad("B_Cap")->setLoadCap(cache->get(cell_name + "->Cap->B"));
 114         getLoad("S0_Cap")->setLoadCap(cache->get(cell_name + "->Cap->S0"));
 115
 116         getDelay("A_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->A_to_Y"));
 117         getDelay("B_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->B_to_Y"));
 118         getDelay("S0_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->S0_to_Y"));
 119
 120         getDriver("Y_Ron")->setOutputRes(cache->get(cell_name + "->DriveRes->Y"));
 121
 122         // Set the cell area
 123         getAreaResult("Active")->setValue(cache->get(cell_name + "->ActiveArea"));
 124         getAreaResult("Metal1Wire")->setValue(cache->get(cell_name + "->ActiveArea"));
 125
 126         return;
 127     }
 128
 129     void MUX2::evaluateModel()
 130     {
 131         return;
 132     }
 133
 134     void MUX2::useModel()
 135     {
 136         // Get parameters
 137         double drive_strength = getDrivingStrength();
 138         Map<double>* cache = getTechModel()->getStdCellLib()->getStdCellCache();
 139
 140         // Standard cell cache string
 141         String cell_name = "MUX2_X" + (String) drive_strength;
 142
 143         // Propagate the transition and get the 0->1 transition count
 144         propagateTransitionInfo();
 145         double P_A = getInputPort("A")->getTransitionInfo().getProbability1();
 146         double P_B = getInputPort("B")->getTransitionInfo().getProbability1();
 147         double P_S0 = getInputPort("S0")->getTransitionInfo().getProbability1();
 148         double S0_num_trans_01 = getInputPort("S0")->getTransitionInfo().getNumberTransitions01();
 149         double Y_num_trans_01 = getOutputPort("Y")->getTransitionInfo().getNumberTransitions01();
 150
 151         // Calculate leakage
 152         double leakage = 0;
 153         leakage += cache->get(cell_name + "->Leakage->!A!B!S0") * (1 - P_A) * (1 - P_B) * (1 - P_S0);
 154         leakage += cache->get(cell_name + "->Leakage->!A!BS0") * (1 - P_A) * (1 - P_B) * P_S0;
 155         leakage += cache->get(cell_name + "->Leakage->!AB!S0") * (1 - P_A) * P_B * (1 - P_S0);
 156         leakage += cache->get(cell_name + "->Leakage->!ABS0") * (1 - P_A) * P_B * P_S0;
 157         leakage += cache->get(cell_name + "->Leakage->A!B!S0") * P_A * (1 - P_B) * (1 - P_S0);
 158         leakage += cache->get(cell_name + "->Leakage->A!BS0") * P_A * (1 - P_B) * P_S0;
 159         leakage += cache->get(cell_name + "->Leakage->AB!S0") * P_A * P_B * (1 - P_S0);
 160         leakage += cache->get(cell_name + "->Leakage->ABS0") * P_A * P_B * P_S0;
 161         getNddPowerResult("Leakage")->setValue(leakage);
 162
 163         // Get VDD
 164         double vdd = getTechModel()->get("Vdd");
 165
 166         // Get capacitances
 167         double s0_b_cap = cache->get(cell_name + "->Cap->S0_b");
 168         double y_bar_cap = cache->get(cell_name + "->Cap->Y_b");
 169         double y_cap = cache->get(cell_name + "->Cap->Y");
 170         double y_load_cap = getNet("Y")->getTotalDownstreamCap();
 171         // Create mux2 event energy
 172         double mux2_event_energy = 0.0;
 173         mux2_event_energy += (s0_b_cap) * S0_num_trans_01;
 174         mux2_event_energy += (y_bar_cap + y_cap + y_load_cap) * Y_num_trans_01;
 175         mux2_event_energy *= vdd * vdd;
 176         getEventResult("MUX2")->setValue(mux2_event_energy);
 177
 178         return;
 179     }
 180
 181     void MUX2::propagateTransitionInfo()
 182     {
 183         // Get input signal transition info
 184         const TransitionInfo& trans_A = getInputPort("A")->getTransitionInfo();
 185         const TransitionInfo& trans_B = getInputPort("B")->getTransitionInfo();
 186         const TransitionInfo& trans_S0 = getInputPort("S0")->getTransitionInfo();
 187
 188         // Scale all transition information to the highest freq multiplier
 189         double max_freq_mult = max(max(trans_A.getFrequencyMultiplier(), trans_B.getFrequencyMultiplier()), trans_S0.getFrequencyMultiplier());
 190         const TransitionInfo& scaled_trans_A = trans_A.scaleFrequencyMultiplier(max_freq_mult);
 191         const TransitionInfo& scaled_trans_B = trans_B.scaleFrequencyMultiplier(max_freq_mult);
 192         const TransitionInfo& scaled_trans_S0 = trans_S0.scaleFrequencyMultiplier(max_freq_mult);
 193
 194         // Compute the probability of each transition on a given cycle
 195         double A_prob_00 = scaled_trans_A.getNumberTransitions00() / max_freq_mult;
 196         double A_prob_01 = scaled_trans_A.getNumberTransitions01() / max_freq_mult;
 197         double A_prob_10 = A_prob_01;
 198         double A_prob_11 = scaled_trans_A.getNumberTransitions11() / max_freq_mult;
 199         double B_prob_00 = scaled_trans_B.getNumberTransitions00() / max_freq_mult;
 200         double B_prob_01 = scaled_trans_B.getNumberTransitions01() / max_freq_mult;
 201         double B_prob_10 = B_prob_01;
 202         double B_prob_11 = scaled_trans_B.getNumberTransitions11() / max_freq_mult;
 203         double S0_prob_00 = scaled_trans_S0.getNumberTransitions00() / max_freq_mult;
 204         double S0_prob_01 = scaled_trans_S0.getNumberTransitions01() / max_freq_mult;
 205         double S0_prob_10 = S0_prob_01;
 206         double S0_prob_11 = scaled_trans_S0.getNumberTransitions11() / max_freq_mult;
 207
 208         // Compute output probabilities
 209         double Y_prob_00 = S0_prob_00 * A_prob_00 +
 210                             S0_prob_01 * (A_prob_00 + A_prob_01) * (B_prob_00 + B_prob_10) +
 211                             S0_prob_10 * (A_prob_00 + A_prob_10) * (B_prob_00 + B_prob_01) +
 212                             S0_prob_11 * B_prob_00;
 213         double Y_prob_01 = S0_prob_00 * A_prob_01 +
 214                             S0_prob_01 * (A_prob_00 + A_prob_01) * (B_prob_01 + B_prob_11) +
 215                             S0_prob_10 * (A_prob_01 + A_prob_11) * (B_prob_00 + B_prob_01) +
 216                             S0_prob_11 * B_prob_01;
 217         double Y_prob_11 = S0_prob_00 * A_prob_11 +
 218                             S0_prob_01 * (A_prob_10 + A_prob_11) * (B_prob_01 + B_prob_11) +
 219                             S0_prob_10 * (A_prob_01 + A_prob_11) * (B_prob_10 + B_prob_11) +
 220                             S0_prob_11 * B_prob_11;
 221
 222         // Check that probabilities add up to 1.0 with some finite tolerance
 223         ASSERT(LibUtil::Math::isEqual((Y_prob_00 + Y_prob_01 + Y_prob_01 + Y_prob_11), 1.0),
 224             "[Error] " + getInstanceName() +  "Output transition probabilities must add up to 1 (" +
 225             (String) Y_prob_00 + ", " + (String) Y_prob_01 + ", " + (String) Y_prob_11 + ")!");
 226
 227         // Turn probability of transitions per cycle into number of transitions per time unit
 228         TransitionInfo trans_Y(Y_prob_00 * max_freq_mult, Y_prob_01 * max_freq_mult, Y_prob_11 * max_freq_mult);
 229         getOutputPort("Y")->setTransitionInfo(trans_Y);
 230
 231         return;
 232     }
 233
 234     // Creates the standard cell, characterizes and abstracts away the details
 235     void MUX2::cacheStdCell(StdCellLib* cell_lib_, double drive_strength_)
 236     {
 237         // Get parameters
 238         double gate_pitch = cell_lib_->getTechModel()->get("Gate->PitchContacted");
 239         Map<double>* cache = cell_lib_->getStdCellCache();
 240
 241         // Standard cell cache string
 242         String cell_name = "MUX2_X" + (String) drive_strength_;
 243
 244         Log::printLine("=== " + cell_name + " ===");
 245
 246         // Now actually build the full standard cell model
 247         createInputPort("A");
 248         createInputPort("B");
 249         createInputPort("S0");
 250         createOutputPort("Y");
 251
 252         createNet("S0_b");
 253         createNet("Y_b");
 254
 255         // Adds macros
 256         CellMacros::addInverter(this, "INV1", false, true, "S0", "S0_b");
 257         CellMacros::addInverter(this, "INV2", false, true, "Y_b", "Y");
 258         CellMacros::addTristate(this, "INVZ1", true, true, true, true, "A", "S0_b", "S0", "Y_b");
 259         CellMacros::addTristate(this, "INVZ2", true, true, true, true, "B", "S0", "S0_b", "Y_b");
 260
 261         // I have no idea how to size each of the parts haha
 262         CellMacros::updateInverter(this, "INV1", drive_strength_ * 0.250);
 263         CellMacros::updateInverter(this, "INV2", drive_strength_ * 1.000);
 264         CellMacros::updateTristate(this, "INVZ1", drive_strength_ * 0.500);
 265         CellMacros::updateTristate(this, "INVZ2", drive_strength_ * 0.500);
 266
 267         // Cache area result
 268         double area = 0.0;
 269         area += gate_pitch * getTotalHeight() * 1;
 270         area += gate_pitch * getTotalHeight() * getGenProperties()->get("INV1_GatePitches").toDouble();
 271         area += gate_pitch * getTotalHeight() * getGenProperties()->get("INV2_GatePitches").toDouble();
 272         area += gate_pitch * getTotalHeight() * getGenProperties()->get("INVZ1_GatePitches").toDouble();
 273         area += gate_pitch * getTotalHeight() * getGenProperties()->get("INVZ2_GatePitches").toDouble();
 274         cache->set(cell_name + "->ActiveArea", area);
 275         Log::printLine(cell_name + "->ActiveArea=" + (String) area);
 276
 277         // --------------------------------------------------------------------
 278         // Cache Leakage Power (for every single signal combination)
 279         // --------------------------------------------------------------------
 280         double leakage_000 = 0;          //!A, !B, !S0
 281         double leakage_001 = 0;          //!A, !B, S0
 282         double leakage_010 = 0;          //!A, B, !S0
 283         double leakage_011 = 0;          //!A, B, S0
 284         double leakage_100 = 0;          //A, !B, !S0
 285         double leakage_101 = 0;          //A, !B, S0
 286         double leakage_110 = 0;          //A, B, !S0
 287         double leakage_111 = 0;          //A, B, S0
 288
 289         //This is so painful...
 290         leakage_000 += getGenProperties()->get("INV1_LeakagePower_0").toDouble();
 291         leakage_000 += getGenProperties()->get("INV2_LeakagePower_1").toDouble();
 292         leakage_000 += getGenProperties()->get("INVZ1_LeakagePower_100_1").toDouble();
 293         leakage_000 += getGenProperties()->get("INVZ2_LeakagePower_010_1").toDouble();
 294
 295         leakage_001 += getGenProperties()->get("INV1_LeakagePower_1").toDouble();
 296         leakage_001 += getGenProperties()->get("INV2_LeakagePower_1").toDouble();
 297         leakage_001 += getGenProperties()->get("INVZ1_LeakagePower_010_1").toDouble();
 298         leakage_001 += getGenProperties()->get("INVZ2_LeakagePower_100_1").toDouble();
 299
 300         leakage_010 += getGenProperties()->get("INV1_LeakagePower_0").toDouble();
 301         leakage_010 += getGenProperties()->get("INV2_LeakagePower_1").toDouble();
 302         leakage_010 += getGenProperties()->get("INVZ1_LeakagePower_100_1").toDouble();
 303         leakage_010 += getGenProperties()->get("INVZ2_LeakagePower_011_1").toDouble();
 304
 305         leakage_011 += getGenProperties()->get("INV1_LeakagePower_1").toDouble();
 306         leakage_011 += getGenProperties()->get("INV2_LeakagePower_0").toDouble();
 307         leakage_011 += getGenProperties()->get("INVZ1_LeakagePower_010_0").toDouble();
 308         leakage_011 += getGenProperties()->get("INVZ2_LeakagePower_101_0").toDouble();
 309
 310         leakage_100 += getGenProperties()->get("INV1_LeakagePower_0").toDouble();
 311         leakage_100 += getGenProperties()->get("INV2_LeakagePower_0").toDouble();
 312         leakage_100 += getGenProperties()->get("INVZ1_LeakagePower_101_0").toDouble();
 313         leakage_100 += getGenProperties()->get("INVZ2_LeakagePower_010_0").toDouble();
 314
 315         leakage_101 += getGenProperties()->get("INV1_LeakagePower_1").toDouble();
 316         leakage_101 += getGenProperties()->get("INV2_LeakagePower_0").toDouble();
 317         leakage_101 += getGenProperties()->get("INVZ1_LeakagePower_011_1").toDouble();
 318         leakage_101 += getGenProperties()->get("INVZ2_LeakagePower_100_1").toDouble();
 319
 320         leakage_110 += getGenProperties()->get("INV1_LeakagePower_1").toDouble();
 321         leakage_110 += getGenProperties()->get("INV2_LeakagePower_1").toDouble();
 322         leakage_110 += getGenProperties()->get("INVZ1_LeakagePower_101_0").toDouble();
 323         leakage_110 += getGenProperties()->get("INVZ2_LeakagePower_011_0").toDouble();
 324
 325         leakage_111 += getGenProperties()->get("INV1_LeakagePower_1").toDouble();
 326         leakage_111 += getGenProperties()->get("INV2_LeakagePower_1").toDouble();
 327         leakage_111 += getGenProperties()->get("INVZ1_LeakagePower_011_0").toDouble();
 328         leakage_111 += getGenProperties()->get("INVZ2_LeakagePower_101_0").toDouble();
 329
 330         cache->set(cell_name + "->Leakage->!A!B!S0", leakage_000);
 331         cache->set(cell_name + "->Leakage->!A!BS0", leakage_001);
 332         cache->set(cell_name + "->Leakage->!AB!S0", leakage_010);
 333         cache->set(cell_name + "->Leakage->!ABS0", leakage_011);
 334         cache->set(cell_name + "->Leakage->A!B!S0", leakage_100);
 335         cache->set(cell_name + "->Leakage->A!BS0", leakage_101);
 336         cache->set(cell_name + "->Leakage->AB!S0", leakage_110);
 337         cache->set(cell_name + "->Leakage->ABS0", leakage_111);
 338         Log::printLine(cell_name + "->Leakage->!A!B!S0=" + (String) leakage_000);
 339         Log::printLine(cell_name + "->Leakage->!A!BS0=" + (String) leakage_001);
 340         Log::printLine(cell_name + "->Leakage->!AB!S0=" + (String) leakage_010);
 341         Log::printLine(cell_name + "->Leakage->!ABS0=" + (String) leakage_011);
 342         Log::printLine(cell_name + "->Leakage->A!B!S0=" + (String) leakage_100);
 343         Log::printLine(cell_name + "->Leakage->A!BS0=" + (String) leakage_101);
 344         Log::printLine(cell_name + "->Leakage->AB!S0=" + (String) leakage_110);
 345         Log::printLine(cell_name + "->Leakage->ABS0=" + (String) leakage_111);
 346
 347         // Cache event energy results
 348         /*
 349         double event_a_flip = 0.0;
 350         event_a_flip += getGenProperties()->get("INVZ1_A_Flip").toDouble();
 351         cache->set(cell_name + "->Event_A_Flip", event_a_flip);
 352         Log::printLine(cell_name + "->Event_A_Flip=" + (String) event_a_flip);
 353
 354         double event_b_flip = 0.0;
 355         event_b_flip += getGenProperties()->get("INVZ1_A_Flip").toDouble();
 356         cache->set(cell_name + "->Event_B_Flip", event_b_flip);
 357         Log::printLine(cell_name + "->Event_B_Flip=" + (String) event_b_flip);
 358
 359         double event_s0_flip = 0.0;
 360         event_s0_flip += getGenProperties()->get("INV1_A_Flip").toDouble();
 361         event_s0_flip += getGenProperties()->get("INV1_ZN_Flip").toDouble();
 362         event_s0_flip += getGenProperties()->get("INVZ1_OE_Flip").toDouble() + getGenProperties()->get("INVZ1_OEN_Flip").toDouble();
 363         event_s0_flip += getGenProperties()->get("INVZ2_OE_Flip").toDouble() + getGenProperties()->get("INVZ2_OEN_Flip").toDouble();
 364         cache->set(cell_name + "->Event_S0_Flip", event_s0_flip);
 365         Log::printLine(cell_name + "->Event_S0_Flip=" + (String) event_s0_flip);
 366
 367         double event_y_flip = 0.0;
 368         event_y_flip += getGenProperties()->get("INVZ1_ZN_Flip").toDouble();
 369         event_y_flip += getGenProperties()->get("INVZ2_ZN_Flip").toDouble();
 370         event_y_flip += getGenProperties()->get("INV2_A_Flip").toDouble();
 371         event_y_flip += getGenProperties()->get("INV2_ZN_Flip").toDouble();
 372         cache->set(cell_name + "->Event_Y_Flip", event_y_flip);
 373         Log::printLine(cell_name + "->Event_Y_Flip=" + (String) event_y_flip);
 374
 375         double a_cap = getLoad("INVZ1_CgA")->getLoadCap();
 376         double b_cap = getLoad("INVZ2_CgA")->getLoadCap();
 377         double s0_cap = getLoad("INV1_CgA")->getLoadCap() + getLoad("INVZ1_CgOEN")->getLoadCap() + getLoad("INVZ2_CgOE")->getLoadCap();
 378         double y_ron = getDriver("INV2_RonZN")->getOutputRes();
 379         */
 380         // --------------------------------------------------------------------
 381
 382         // --------------------------------------------------------------------
 383         // Get Node capacitances
 384         // --------------------------------------------------------------------
 385         double a_cap = getNet("A")->getTotalDownstreamCap();
 386         double b_cap = getNet("B")->getTotalDownstreamCap();
 387         double s0_cap = getNet("S0")->getTotalDownstreamCap();
 388         double s0_b_cap = getNet("S0_b")->getTotalDownstreamCap();
 389         double y_b_cap = getNet("Y_b")->getTotalDownstreamCap();
 390         double y_cap = getNet("Y")->getTotalDownstreamCap();
 391
 392         cache->set(cell_name + "->Cap->A", a_cap);
 393         cache->set(cell_name + "->Cap->B", b_cap);
 394         cache->set(cell_name + "->Cap->S0", s0_cap);
 395         cache->set(cell_name + "->Cap->S0_b", s0_b_cap);
 396         cache->set(cell_name + "->Cap->Y_b", y_b_cap);
 397         cache->set(cell_name + "->Cap->Y", y_cap);
 398
 399         Log::printLine(cell_name + "->Cap->A=" + (String) a_cap);
 400         Log::printLine(cell_name + "->Cap->B=" + (String) b_cap);
 401         Log::printLine(cell_name + "->Cap->S0=" + (String) s0_cap);
 402         Log::printLine(cell_name + "->Cap->S0_b=" + (String) s0_b_cap);
 403         Log::printLine(cell_name + "->Cap->Y_b=" + (String) y_b_cap);
 404         Log::printLine(cell_name + "->Cap->Y=" + (String) y_cap);
 405         // --------------------------------------------------------------------
 406
 407         // --------------------------------------------------------------------
 408         // Build Internal Delay Model
 409         // --------------------------------------------------------------------
 410         // Build abstracted timing model
 411         double y_ron = getDriver("INV2_RonZN")->getOutputRes();
 412
 413         double a_to_y_delay = 0.0;
 414         a_to_y_delay += getDriver("INVZ1_RonZN")->calculateDelay();
 415         a_to_y_delay += getDriver("INV2_RonZN")->calculateDelay();
 416
 417         double b_to_y_delay = 0.0;
 418         b_to_y_delay += getDriver("INVZ1_RonZN")->calculateDelay();
 419         b_to_y_delay += getDriver("INV2_RonZN")->calculateDelay();
 420
 421         double s0_to_y_delay = 0.0;
 422         s0_to_y_delay += getDriver("INV1_RonZN")->calculateDelay();
 423         s0_to_y_delay += max(getDriver("INVZ1_RonZN")->calculateDelay(), getDriver("INVZ1_RonZN")->calculateDelay());
 424         s0_to_y_delay += getDriver("INV2_RonZN")->calculateDelay();
 425
 426         cache->set(cell_name + "->DriveRes->Y", y_ron);
 427         cache->set(cell_name + "->Delay->A_to_Y", a_to_y_delay);
 428         cache->set(cell_name + "->Delay->B_to_Y", b_to_y_delay);
 429         cache->set(cell_name + "->Delay->S0_to_Y", s0_to_y_delay);
 430
 431         Log::printLine(cell_name + "->DriveRes->Y=" + (String) y_ron);
 432         Log::printLine(cell_name + "->Delay->A_to_Y=" + (String) a_to_y_delay);
 433         Log::printLine(cell_name + "->Delay->B_to_Y=" + (String) b_to_y_delay);
 434         Log::printLine(cell_name + "->Delay->S0_to_Y=" + (String) s0_to_y_delay);
 435         // --------------------------------------------------------------------
 436
 437         return;
 438     }
 439
 440 } // namespace DSENT
 441