AND2.cc revision 10447 
1#include "model/std_cells/AND2.h"
2
3#include <cmath>
4
5#include "model/PortInfo.h"
6#include "model/TransitionInfo.h"
7#include "model/EventInfo.h"
8#include "model/std_cells/StdCellLib.h"
9#include "model/std_cells/CellMacros.h"
10#include "model/timing_graph/ElectricalNet.h"
11#include "model/timing_graph/ElectricalDriver.h"
12#include "model/timing_graph/ElectricalLoad.h"
13#include "model/timing_graph/ElectricalDelay.h"
14
15namespace DSENT
16{
17    using std::max;
18
19    AND2::AND2(const String& instance_name_, const TechModel* tech_model_)
20        : StdCell(instance_name_, tech_model_)
21    {
22        initProperties();
23    }
24
25    AND2::~AND2()
26    {}
27
28    void AND2::initProperties()
29    {
30        return;
31    }
32
33    void AND2::constructModel()
34    {
35        // All constructModel should do is create Area/NDDPower/Energy Results as
36        // well as instantiate any sub-instances using only the hard parameters
37
38        createInputPort("A");
39        createInputPort("B");
40        createOutputPort("Y");
41
42        createLoad("A_Cap");
43        createLoad("B_Cap");
44        createDelay("A_to_Y_delay");
45        createDelay("B_to_Y_delay");
46        createDriver("Y_Ron", true);
47
48        ElectricalLoad* a_cap = getLoad("A_Cap");
49        ElectricalLoad* b_cap = getLoad("B_Cap");
50        ElectricalDelay* a_to_y_delay = getDelay("A_to_Y_delay");
51        ElectricalDelay* b_to_y_delay = getDelay("B_to_Y_delay");
52        ElectricalDriver* y_ron = getDriver("Y_Ron");
53
54        getNet("A")->addDownstreamNode(a_cap);
55        getNet("B")->addDownstreamNode(b_cap);
56        a_cap->addDownstreamNode(a_to_y_delay);
57        b_cap->addDownstreamNode(b_to_y_delay);
58        a_to_y_delay->addDownstreamNode(y_ron);
59        b_to_y_delay->addDownstreamNode(y_ron);
60        y_ron->addDownstreamNode(getNet("Y"));
61
62        // Create Area result
63        // Create NDD Power result
64        createElectricalAtomicResults();
65        getEventInfo("Idle")->setStaticTransitionInfos();
66        // Create AND Event Energy Result
67        createElectricalEventAtomicResult("AND2");
68
69        return;
70    }
71
72    void AND2::updateModel()
73    {
74        // All updateModel should do is calculate numbers for the Area/NDDPower/Energy
75        // Results as anything else that needs to be done using either soft or hard parameters
76
77        // Get parameters
78        double drive_strength = getDrivingStrength();
79        Map<double>* cache = getTechModel()->getStdCellLib()->getStdCellCache();
80
81        // Standard cell cache string
82        String cell_name = "AND2_X" + (String) drive_strength;
83
84        // Get timing parameters
85        getLoad("A_Cap")->setLoadCap(cache->get(cell_name + "->Cap->A"));
86        getLoad("B_Cap")->setLoadCap(cache->get(cell_name + "->Cap->B"));
87        getDelay("A_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->A_to_Y"));
88        getDelay("B_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->B_to_Y"));
89        getDriver("Y_Ron")->setOutputRes(cache->get(cell_name + "->DriveRes->Y"));
90
91        // Set the cell area
92        getAreaResult("Active")->setValue(cache->get(cell_name + "->ActiveArea"));
93        getAreaResult("Metal1Wire")->setValue(cache->get(cell_name + "->ActiveArea"));
94
95        return;
96    }
97
98    void AND2::evaluateModel()
99    {
100        return;
101    }
102
103    void AND2::useModel()
104    {
105        // Get parameters
106        double drive_strength = getDrivingStrength();
107        Map<double>* cache = getTechModel()->getStdCellLib()->getStdCellCache();
108
109        // Standard cell cache string
110        String cell_name = "AND2_X" + (String) drive_strength;
111
112        // Propagate the transition info and get the 0->1 transtion count
113        propagateTransitionInfo();
114        double P_A = getInputPort("A")->getTransitionInfo().getProbability1();
115        double P_B = getInputPort("B")->getTransitionInfo().getProbability1();
116        double Y_num_trans_01 = getOutputPort("Y")->getTransitionInfo().getNumberTransitions01();
117
118        // Calculate leakage
119        double leakage = 0;
120        leakage += cache->get(cell_name + "->Leakage->!A!B") * (1 - P_A) * (1 - P_B);
121        leakage += cache->get(cell_name + "->Leakage->!AB") * (1 - P_A) * P_B;
122        leakage += cache->get(cell_name + "->Leakage->A!B") * P_A * (1 - P_B);
123        leakage += cache->get(cell_name + "->Leakage->AB") * P_A * P_B;
124        getNddPowerResult("Leakage")->setValue(leakage);
125
126        // Get VDD
127        double vdd = getTechModel()->get("Vdd");
128
129        // Get capacitances
130        double y_b_cap = cache->get(cell_name + "->Cap->Y_b");
131        double y_cap = cache->get(cell_name + "->Cap->Y");
132        double y_load_cap = getNet("Y")->getTotalDownstreamCap();
133
134        // Calculate AND2Event energy
135        double energy_per_trans_01 = (y_b_cap + y_cap + y_load_cap) * vdd * vdd;
136        getEventResult("AND2")->setValue(energy_per_trans_01 * Y_num_trans_01);
137
138        return;
139    }
140
141    void AND2::propagateTransitionInfo()
142    {
143        // Get input signal transition info
144        const TransitionInfo& trans_A = getInputPort("A")->getTransitionInfo();
145        const TransitionInfo& trans_B = getInputPort("B")->getTransitionInfo();
146
147        double max_freq_mult = max(trans_A.getFrequencyMultiplier(), trans_B.getFrequencyMultiplier());
148        const TransitionInfo& scaled_trans_A = trans_A.scaleFrequencyMultiplier(max_freq_mult);
149        const TransitionInfo& scaled_trans_B = trans_B.scaleFrequencyMultiplier(max_freq_mult);
150
151        double A_prob_00 = scaled_trans_A.getNumberTransitions00() / max_freq_mult;
152        double A_prob_01 = scaled_trans_A.getNumberTransitions01() / max_freq_mult;
153        double A_prob_10 = A_prob_01;
154        double A_prob_11 = scaled_trans_A.getNumberTransitions11() / max_freq_mult;
155        double B_prob_00 = scaled_trans_B.getNumberTransitions00() / max_freq_mult;
156        double B_prob_01 = scaled_trans_B.getNumberTransitions01() / max_freq_mult;
157        double B_prob_10 = B_prob_01;
158        double B_prob_11 = scaled_trans_B.getNumberTransitions11() / max_freq_mult;
159
160        // Set output transition info
161        double Y_prob_00 = A_prob_00 +
162                        A_prob_01 * (B_prob_00 + B_prob_10) +
163                        A_prob_10 * (B_prob_00 + B_prob_01) +
164                        A_prob_11 * B_prob_00;
165        double Y_prob_01 = A_prob_01 * (B_prob_01 + B_prob_11) +
166                        A_prob_11 * B_prob_01;
167        double Y_prob_11 = A_prob_11 * B_prob_11;
168
169        // Check that probabilities add up to 1.0 with some finite tolerance
170        ASSERT(LibUtil::Math::isEqual(Y_prob_00 + Y_prob_01 + Y_prob_01 + Y_prob_11, 1.0), "[Error] " + getInstanceName() +
171            "Output transition probabilities must add up to 1 (" + (String) Y_prob_00 + ", " +
172            (String) Y_prob_01 + ", " + (String) Y_prob_11 + ")!");
173
174        // Turn probability of transitions per cycle into number of transitions per time unit
175        TransitionInfo trans_Y(Y_prob_00 * max_freq_mult, Y_prob_01 * max_freq_mult, Y_prob_11 * max_freq_mult);
176        getOutputPort("Y")->setTransitionInfo(trans_Y);
177        return;
178    }
179
180    void AND2::cacheStdCell(StdCellLib* cell_lib_, double drive_strength_)
181    {
182        // Standard cell cache string
183        String cell_name = "AND2_X" + (String) drive_strength_;
184
185        Log::printLine("=== " + cell_name + " ===");
186
187        // Get parameters
188        double gate_pitch = cell_lib_->getTechModel()->get("Gate->PitchContacted");
189        Map<double>* cache = cell_lib_->getStdCellCache();
190
191        // Now actually build the full standard cell model
192        // Create the two input ports
193        createInputPort("A");
194        createInputPort("B");
195        createOutputPort("Y");
196
197        createNet("Y_b");
198
199        // Adds macros
200        CellMacros::addNand2(this, "NAND2", false, true, true, "A", "B", "Y_b");
201        CellMacros::addInverter(this, "INV", false, true, "Y_b", "Y");
202        CellMacros::updateNand2(this, "NAND2", drive_strength_ * 0.5);
203        CellMacros::updateInverter(this, "INV", drive_strength_ * 1.0);
204
205        // Cache area result
206        double area = 0.0;
207        area += gate_pitch * getTotalHeight() * 1;
208        area += gate_pitch * getTotalHeight() * getGenProperties()->get("NAND2_GatePitches").toDouble();
209        area += gate_pitch * getTotalHeight() * getGenProperties()->get("INV_GatePitches").toDouble();
210        cache->set(cell_name + "->ActiveArea", area);
211        Log::printLine(cell_name + "->ActiveArea=" + (String) area);
212
213        // --------------------------------------------------------------------
214        // Leakage Model Calculation
215        // --------------------------------------------------------------------
216        double leakage_00 = getGenProperties()->get("NAND2_LeakagePower_00").toDouble() +
217                            getGenProperties()->get("INV_LeakagePower_0").toDouble();
218        double leakage_01 = getGenProperties()->get("NAND2_LeakagePower_01").toDouble() +
219                            getGenProperties()->get("INV_LeakagePower_0").toDouble();
220        double leakage_10 = getGenProperties()->get("NAND2_LeakagePower_10").toDouble() +
221                            getGenProperties()->get("INV_LeakagePower_0").toDouble();
222        double leakage_11 = getGenProperties()->get("NAND2_LeakagePower_11").toDouble() +
223                            getGenProperties()->get("INV_LeakagePower_1").toDouble();
224        cache->set(cell_name + "->Leakage->!A!B", leakage_00);
225        cache->set(cell_name + "->Leakage->!AB", leakage_01);
226        cache->set(cell_name + "->Leakage->A!B", leakage_10);
227        cache->set(cell_name + "->Leakage->AB", leakage_11);
228        Log::printLine(cell_name + "->Leakage->!A!B=" + (String) leakage_00);
229        Log::printLine(cell_name + "->Leakage->!AB=" + (String) leakage_01);
230        Log::printLine(cell_name + "->Leakage->A!B=" + (String) leakage_10);
231        Log::printLine(cell_name + "->Leakage->AB=" + (String) leakage_11);
232        // --------------------------------------------------------------------
233
234        // --------------------------------------------------------------------
235        // Get Node Capacitances
236        // --------------------------------------------------------------------
237        double a_cap = getNet("A")->getTotalDownstreamCap();
238        double b_cap = getNet("B")->getTotalDownstreamCap();
239        double y_b_cap = getNet("Y_b")->getTotalDownstreamCap();
240        double y_cap = getNet("Y")->getTotalDownstreamCap();
241
242        cache->set(cell_name + "->Cap->A", a_cap);
243        cache->set(cell_name + "->Cap->B", b_cap);
244        cache->set(cell_name + "->Cap->Y_b", y_b_cap);
245        cache->set(cell_name + "->Cap->Y", y_cap);
246        Log::printLine(cell_name + "->Cap->A=" + (String) a_cap);
247        Log::printLine(cell_name + "->Cap->B=" + (String) b_cap);
248        Log::printLine(cell_name + "->Cap->Y=" + (String) y_b_cap);
249        Log::printLine(cell_name + "->Cap->Y=" + (String) y_cap);
250        // --------------------------------------------------------------------
251
252        // --------------------------------------------------------------------
253        // Build Internal Delay Model
254        // --------------------------------------------------------------------
255        double y_ron = getDriver("INV_RonZN")->getOutputRes();
256        double a_to_y_delay = getDriver("NAND2_RonZN")->calculateDelay() +
257                              getDriver("INV_RonZN")->calculateDelay();
258        double b_to_y_delay = getDriver("NAND2_RonZN")->calculateDelay() +
259                              getDriver("INV_RonZN")->calculateDelay();
260
261        cache->set(cell_name + "->DriveRes->Y", y_ron);
262        cache->set(cell_name + "->Delay->A_to_Y", a_to_y_delay);
263        cache->set(cell_name + "->Delay->B_to_Y", b_to_y_delay);
264        Log::printLine(cell_name + "->DriveRes->Y=" + (String) y_ron);
265        Log::printLine(cell_name + "->Delay->A_to_Y=" + (String) a_to_y_delay);
266        Log::printLine(cell_name + "->Delay->B_to_Y=" + (String) b_to_y_delay);
267        // --------------------------------------------------------------------
268
269        return;
270
271    }
272} // namespace DSENT
273