The-OpenROAD-Project_OpenSTA/dcalc/DelayCalcBase.hh

// OpenSTA, Static Timing Analyzer
// Copyright (c) 2026, 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/>.
// 
// The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software.
// 
// Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
// 
// This notice may not be removed or altered from any source distribution.

#pragma once

#include "ArcDelayCalc.hh"

namespace sta {

class GateTableModel;

// ArcDelayCalc helper functions.
class DelayCalcBase : public ArcDelayCalc
{
public:
  DelayCalcBase(StaState *sta);
  void finishDrvrPin() override;

  void reduceParasitic(const Parasitic *parasitic_network,
                       const Net *net,
                       const Scene *scene,
                       const MinMaxAll *min_max) override;
  void setDcalcArgParasiticSlew(ArcDcalcArg &gate,
                                const Scene *scene,
                                const MinMax *min_max) override;
  void setDcalcArgParasiticSlew(ArcDcalcArgSeq &gates,
                                const Scene *scene,
                                const MinMax *min_max) override;
  ArcDelay checkDelay(const Pin *check_pin,
                      const TimingArc *arc,
                      const Slew &from_slew,
                      const Slew &to_slew,
                      float related_out_cap,
                      const Scene *scene,
                      const MinMax *min_max) override;
  
  std::string reportCheckDelay(const Pin *check_pin,
                               const TimingArc *arc,
                               const Slew &from_slew,
                               std::string_view from_slew_annotation,
                               const Slew &to_slew,
                               float related_out_cap,
                               const Scene *scene,
                               const MinMax *min_max,
                               int digits) override;

protected:
  // Find the liberty library to use for logic/slew thresholds.
  LibertyLibrary *thresholdLibrary(const Pin *load_pin);
  // Adjust load_delay and load_slew from driver thresholds to load thresholds.
  void thresholdAdjust(const Pin *load_pin,
                       const LibertyLibrary *drvr_library,
                       const RiseFall *rf,
                       double &wire_delay,
                       double &load_slew);
  // Helper function for input ports driving dspf parasitic.
  void dspfWireDelaySlew(const Pin *load_pin,
                         const RiseFall *rf,
                         double drvr_slew,
                         float elmore,
                         // Return values.
                         double &wire_delay,
                         double &load_slew);
  const Pvt *pinPvt(const Pin *pin,
                    const Scene *scene,
                    const MinMax *min_max);

  using ArcDelayCalc::reduceParasitic;
};

} // namespace sta