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Diffstat (limited to 'ext/dsent/model/std_cells/NAND2.cc')
| -rw-r--r-- | ext/dsent/model/std_cells/NAND2.cc | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/ext/dsent/model/std_cells/NAND2.cc b/ext/dsent/model/std_cells/NAND2.cc new file mode 100644 index 000000000..2599f8527 --- /dev/null +++ b/ext/dsent/model/std_cells/NAND2.cc @@ -0,0 +1,267 @@ +#include "model/std_cells/NAND2.h" + +#include <cmath> + +#include "model/PortInfo.h" +#include "model/TransitionInfo.h" +#include "model/EventInfo.h" +#include "model/std_cells/StdCellLib.h" +#include "model/std_cells/CellMacros.h" +#include "model/timing_graph/ElectricalNet.h" +#include "model/timing_graph/ElectricalDriver.h" +#include "model/timing_graph/ElectricalLoad.h" +#include "model/timing_graph/ElectricalDelay.h" + +namespace DSENT +{ + using std::ceil; + using std::max; + + NAND2::NAND2(const String& instance_name_, const TechModel* tech_model_) + : StdCell(instance_name_, tech_model_) + { + initProperties(); + } + + NAND2::~NAND2() + {} + + void NAND2::initProperties() + { + return; + } + + void NAND2::constructModel() + { + // All constructModel should do is create Area/NDDPower/Energy Results as + // well as instantiate any sub-instances using only the hard parameters + + createInputPort("A"); + createInputPort("B"); + createOutputPort("Y"); + + createLoad("A_Cap"); + createLoad("B_Cap"); + createDelay("A_to_Y_delay"); + createDelay("B_to_Y_delay"); + createDriver("Y_Ron", true); + + ElectricalLoad* a_cap = getLoad("A_Cap"); + ElectricalLoad* b_cap = getLoad("A_Cap"); + ElectricalDelay* a_to_y_delay = getDelay("A_to_Y_delay"); + ElectricalDelay* b_to_y_delay = getDelay("B_to_Y_delay"); + ElectricalDriver* y_ron = getDriver("Y_Ron"); + + getNet("A")->addDownstreamNode(a_cap); + getNet("B")->addDownstreamNode(b_cap); + a_cap->addDownstreamNode(a_to_y_delay); + b_cap->addDownstreamNode(b_to_y_delay); + a_to_y_delay->addDownstreamNode(y_ron); + b_to_y_delay->addDownstreamNode(y_ron); + y_ron->addDownstreamNode(getNet("Y")); + + // Create Area result + // Create NDD Power result + createElectricalAtomicResults(); + // Create NAND Event Energy Result + createElectricalEventAtomicResult("NAND2"); + + getEventInfo("Idle")->setStaticTransitionInfos(); + + return; + } + + void NAND2::updateModel() + { + // All updateModel should do is calculate numbers for the Area/NDDPower/Energy + // Results as anything else that needs to be done using either soft or hard parameters + + // Get parameters + double drive_strength = getDrivingStrength(); + Map<double>* cache = getTechModel()->getStdCellLib()->getStdCellCache(); + + // Standard cell cache string + String cell_name = "NAND2_X" + (String) drive_strength; + + // Get timing parameters + getLoad("A_Cap")->setLoadCap(cache->get(cell_name + "->Cap->A")); + getLoad("B_Cap")->setLoadCap(cache->get(cell_name + "->Cap->B")); + getDelay("A_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->A_to_Y")); + getDelay("B_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->B_to_Y")); + getDriver("Y_Ron")->setOutputRes(cache->get(cell_name + "->DriveRes->Y")); + + // Set the cell area + getAreaResult("Active")->setValue(cache->get(cell_name + "->Area->Active")); + getAreaResult("Metal1Wire")->setValue(cache->get(cell_name + "->Area->Active")); + + return; + } + + void NAND2::useModel() + { + // Get parameters + double drive_strength = getDrivingStrength(); + Map<double>* cache = getTechModel()->getStdCellLib()->getStdCellCache(); + + // Standard cell cache string + String cell_name = "NAND2_X" + (String) drive_strength; + + // Propagate the transition info and get the 0->1 transtion count + propagateTransitionInfo(); + double P_A = getInputPort("A")->getTransitionInfo().getProbability1(); + double P_B = getInputPort("B")->getTransitionInfo().getProbability1(); + double Y_num_trans_01 = getOutputPort("Y")->getTransitionInfo().getNumberTransitions01(); + + // Calculate leakage + double leakage = 0; + leakage += cache->get(cell_name + "->Leakage->!A!B") * (1 - P_A) * (1 - P_B); + leakage += cache->get(cell_name + "->Leakage->!AB") * (1 - P_A) * P_B; + leakage += cache->get(cell_name + "->Leakage->A!B") * P_A * (1 - P_B); + leakage += cache->get(cell_name + "->Leakage->AB") * P_A * P_B; + getNddPowerResult("Leakage")->setValue(leakage); + + // Get capacitances + double y_cap = cache->get(cell_name + "->Cap->Y"); + double y_load_cap = getNet("Y")->getTotalDownstreamCap(); + + // Get VDD + double vdd = getTechModel()->get("Vdd"); + + // Calculate NAND2Event energy + double energy_per_trans_01 = (y_cap + y_load_cap) * vdd * vdd; + getEventResult("NAND2")->setValue(energy_per_trans_01 * Y_num_trans_01); + + return; + } + + void NAND2::propagateTransitionInfo() + { + // Get input signal transition info + const TransitionInfo& trans_A = getInputPort("A")->getTransitionInfo(); + const TransitionInfo& trans_B = getInputPort("B")->getTransitionInfo(); + + double max_freq_mult = max(trans_A.getFrequencyMultiplier(), trans_B.getFrequencyMultiplier()); + const TransitionInfo& scaled_trans_A = trans_A.scaleFrequencyMultiplier(max_freq_mult); + const TransitionInfo& scaled_trans_B = trans_B.scaleFrequencyMultiplier(max_freq_mult); + + double A_prob_00 = scaled_trans_A.getNumberTransitions00() / max_freq_mult; + double A_prob_01 = scaled_trans_A.getNumberTransitions01() / max_freq_mult; + double A_prob_10 = A_prob_01; + double A_prob_11 = scaled_trans_A.getNumberTransitions11() / max_freq_mult; + double B_prob_00 = scaled_trans_B.getNumberTransitions00() / max_freq_mult; + double B_prob_01 = scaled_trans_B.getNumberTransitions01() / max_freq_mult; + double B_prob_10 = B_prob_01; + double B_prob_11 = scaled_trans_B.getNumberTransitions11() / max_freq_mult; + + // Set output transition info + double Y_prob_00 = A_prob_11 * B_prob_11; + double Y_prob_01 = A_prob_11 * B_prob_10 + + A_prob_10 * (B_prob_11 + B_prob_10); + double Y_prob_11 = A_prob_00 + + A_prob_01 * (B_prob_00 + B_prob_10) + + A_prob_10 * (B_prob_00 + B_prob_01) + + A_prob_11 * B_prob_00; + + // Check that probabilities add up to 1.0 with some finite tolerance + ASSERT(LibUtil::Math::isEqual((Y_prob_00 + Y_prob_01 + Y_prob_01 + Y_prob_11), 1.0), + "[Error] " + getInstanceName() + "Output transition probabilities must add up to 1 (" + + (String) Y_prob_00 + ", " + (String) Y_prob_01 + ", " + (String) Y_prob_11 + ")!"); + + // Turn probability of transitions per cycle into number of transitions per time unit + TransitionInfo trans_Y(Y_prob_00 * max_freq_mult, Y_prob_01 * max_freq_mult, Y_prob_11 * max_freq_mult); + getOutputPort("Y")->setTransitionInfo(trans_Y); + return; + } + + void NAND2::cacheStdCell(StdCellLib* cell_lib_, double drive_strength_) + { + // Standard cell cache string + String cell_name = "NAND2_X" + (String) drive_strength_; + + Log::printLine("=== " + cell_name + " ==="); + + // Get parameters + double gate_pitch = cell_lib_->getTechModel()->get("Gate->PitchContacted"); + Map<double>* cache = cell_lib_->getStdCellCache(); + + // Now actually build the full standard cell model + // Create the two input ports + createInputPort("A"); + createInputPort("B"); + createOutputPort("Y"); + + // Adds macros + CellMacros::addNand2(this, "NAND", true, true, true, "A", "B", "Y"); + CellMacros::updateNand2(this, "NAND", drive_strength_); + + // Cache area result + double area = gate_pitch * getTotalHeight() * (1 + getGenProperties()->get("NAND_GatePitches").toDouble()); + cache->set(cell_name + "->Area->Active", area); + Log::printLine(cell_name + "->Area->Active=" + (String) area); + + // -------------------------------------------------------------------- + // Leakage Model Calculation + // -------------------------------------------------------------------- + double leakage_00 = getGenProperties()->get("NAND_LeakagePower_00").toDouble(); + double leakage_01 = getGenProperties()->get("NAND_LeakagePower_01").toDouble(); + double leakage_10 = getGenProperties()->get("NAND_LeakagePower_10").toDouble(); + double leakage_11 = getGenProperties()->get("NAND_LeakagePower_11").toDouble(); + cache->set(cell_name + "->Leakage->!A!B", leakage_00); + cache->set(cell_name + "->Leakage->!AB", leakage_01); + cache->set(cell_name + "->Leakage->A!B", leakage_10); + cache->set(cell_name + "->Leakage->AB", leakage_11); + Log::printLine(cell_name + "->Leakage->!A!B=" + (String) leakage_00); + Log::printLine(cell_name + "->Leakage->!AB=" + (String) leakage_01); + Log::printLine(cell_name + "->Leakage->A!B=" + (String) leakage_10); + Log::printLine(cell_name + "->Leakage->AB=" + (String) leakage_11); + // -------------------------------------------------------------------- + + // Cache event energy results + /* + double event_a_flip = getGenProperties()->get("NAND_A1_Flip").toDouble(); + double event_b_flip = getGenProperties()->get("NAND_A2_Flip").toDouble(); + double event_y_flip = getGenProperties()->get("NAND_ZN_Flip").toDouble(); + + cache->set(cell_name + "->Event_A_Flip", event_a_flip); + cache->set(cell_name + "->Event_B_Flip", event_b_flip); + cache->set(cell_name + "->Event_Y_Flip", event_y_flip); + Log::printLine(cell_name + "->Event_A_Flip=" + (String) event_a_flip); + Log::printLine(cell_name + "->Event_B_Flip=" + (String) event_b_flip); + Log::printLine(cell_name + "->Event_Y_Flip=" + (String) event_y_flip); + */ + // -------------------------------------------------------------------- + // Get Node Capacitances + // -------------------------------------------------------------------- + double a_cap = getNet("A")->getTotalDownstreamCap(); + double b_cap = getNet("B")->getTotalDownstreamCap(); + double y_cap = getNet("Y")->getTotalDownstreamCap(); + + cache->set(cell_name + "->Cap->A", a_cap); + cache->set(cell_name + "->Cap->B", b_cap); + cache->set(cell_name + "->Cap->Y", y_cap); + Log::printLine(cell_name + "->Cap->A=" + (String) a_cap); + Log::printLine(cell_name + "->Cap->B=" + (String) b_cap); + Log::printLine(cell_name + "->Cap->Y=" + (String) y_cap); + // -------------------------------------------------------------------- + + // -------------------------------------------------------------------- + // Build Internal Delay Model + // -------------------------------------------------------------------- + double y_ron = getDriver("NAND_RonZN")->getOutputRes(); + double a_to_y_delay = getDriver("NAND_RonZN")->calculateDelay(); + double b_to_y_delay = getDriver("NAND_RonZN")->calculateDelay(); + + cache->set(cell_name + "->DriveRes->Y", y_ron); + cache->set(cell_name + "->Delay->A_to_Y", a_to_y_delay); + cache->set(cell_name + "->Delay->B_to_Y", b_to_y_delay); + Log::printLine(cell_name + "->DriveRes->Y=" + (String) y_ron); + Log::printLine(cell_name + "->Delay->A_to_Y=" + (String) a_to_y_delay); + Log::printLine(cell_name + "->Delay->B_to_Y=" + (String) b_to_y_delay); + // -------------------------------------------------------------------- + + return; + + } + +} // namespace DSENT + |