OpenSTA/dcalc/LumpedCapDelayCalc.hh

// OpenSTA, Static Timing Analyzer
// Copyright (c) 2024, Parallax Software, Inc.
// 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

#pragma once

#include "ParallelDelayCalc.hh"

namespace sta {

// Liberty table model lumped capacitance arc delay calculator.
// Wire delays are zero.
class LumpedCapDelayCalc : public ParallelDelayCalc
{
public:
  LumpedCapDelayCalc(StaState *sta);
  ArcDelayCalc *copy() override;
  Parasitic *findParasitic(const Pin *drvr_pin,
                           const RiseFall *rf,
                           const DcalcAnalysisPt *dcalc_ap) override;
  ReducedParasiticType reducedParasiticType() const override;
  ArcDcalcResult inputPortDelay(const Pin *port_pin,
                                float in_slew,
                                const RiseFall *rf,
                                const Parasitic *parasitic,
                                const LoadPinIndexMap &load_pin_index_map,
                                const DcalcAnalysisPt *dcalc_ap) override;
  ArcDcalcResult gateDelay(const Pin *drvr_pin,
                           const TimingArc *arc,
                           const Slew &in_slew,
                           float load_cap,
                           const Parasitic *parasitic,
                           const LoadPinIndexMap &load_pin_index_map,
                           const DcalcAnalysisPt *dcalc_ap) override;
  string reportGateDelay(const Pin *drvr_pin,
                         const TimingArc *arc,
                         const Slew &in_slew,
                         float load_cap,
                         const Parasitic *parasitic,
                         const LoadPinIndexMap &load_pin_index_map,
                         const DcalcAnalysisPt *dcalc_ap,
                         int digits) override;

protected:
  ArcDcalcResult makeResult(const LibertyLibrary *drvr_library,
                            const RiseFall *rf,
                            ArcDelay gate_delay,
                            Slew drvr_slew,
                            const LoadPinIndexMap &load_pin_index_map);
};

ArcDelayCalc *
makeLumpedCapDelayCalc(StaState *sta);

} // namespace