106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
// OpenSTA, Static Timing Analyzer
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// Copyright (c) 2019, Parallax Software, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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#ifndef STA_DMP_CEFF_H
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#define STA_DMP_CEFF_H
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#include "LibertyClass.hh"
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#include "RCDelayCalc.hh"
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namespace sta {
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class DmpAlg;
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class DmpCap;
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class DmpPi;
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class DmpZeroC2;
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// Delay calculator using Dartu/Menezes/Pileggi effective capacitance
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// algorithm for RSPF loads.
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class DmpCeffDelayCalc : public RCDelayCalc
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{
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public:
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DmpCeffDelayCalc(StaState *sta);
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virtual ~DmpCeffDelayCalc();
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virtual void inputPortDelay(const Pin *port_pin,
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float in_slew,
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const TransRiseFall *tr,
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Parasitic *parasitic,
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const DcalcAnalysisPt *dcalc_ap);
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virtual void gateDelay(const LibertyCell *drvr_cell,
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TimingArc *arc,
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const Slew &in_slew,
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float load_cap,
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Parasitic *drvr_parasitic,
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float related_out_cap,
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const Pvt *pvt,
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const DcalcAnalysisPt *dcalc_ap,
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// return values
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ArcDelay &gate_delay,
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Slew &drvr_slew);
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virtual float ceff(const LibertyCell *drvr_cell,
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TimingArc *arc,
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const Slew &in_slew,
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float load_cap,
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Parasitic *drvr_parasitic,
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float related_out_cap,
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const Pvt *pvt,
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const DcalcAnalysisPt *dcalc_ap);
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virtual void reportGateDelay(const LibertyCell *drvr_cell,
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TimingArc *arc,
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const Slew &in_slew,
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float load_cap,
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Parasitic *drvr_parasitic,
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float related_out_cap,
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const Pvt *pvt,
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const DcalcAnalysisPt *dcalc_ap,
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int digits,
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string *result);
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virtual void copyState(const StaState *sta);
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protected:
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void gateDelaySlew(double &delay,
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double &slew);
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void loadDelaySlew(const Pin *load_pin,
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double elmore,
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ArcDelay &delay,
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Slew &slew);
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// Select the appropriate special case Dartu/Menezes/Pileggi algorithm.
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void setCeffAlgorithm(const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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GateTableModel *gate_model,
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double in_slew,
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float related_out_cap,
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double c2,
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double rpi,
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double c1);
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float ceff() const;
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bool input_port_;
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static bool unsuppored_model_warned_;
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private:
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// Dmp algorithms for each special pi model case.
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// These objects are reused to minimize make/deletes.
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DmpCap *dmp_cap_;
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DmpPi *dmp_pi_;
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DmpZeroC2 *dmp_zero_c2_;
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DmpAlg *dmp_alg_;
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};
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} // namespace
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#endif
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