// OpenSTA, Static Timing Analyzer
// Copyright (c) 2023, 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 "ArcDelayCalc.hh"
namespace sta {
class DelayCalcBase : public ArcDelayCalc
{
public:
explicit DelayCalcBase(StaState *sta);
void inputPortDelay(const Pin *port_pin,
float in_slew,
const RiseFall *rf,
const Parasitic *parasitic,
const DcalcAnalysisPt *dcalc_ap) override;
void finishDrvrPin() override;
protected:
void gateDelayInit(const TimingArc *arc,
const Slew &in_slew,
const Parasitic *drvr_parasitic);
// 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,
ArcDelay &load_delay,
Slew &load_slew);
// Helper function for input ports driving dspf parasitic.
void dspfWireDelaySlew(const Pin *load_pin,
float elmore,
ArcDelay &wire_delay,
Slew drvr_slew_;
const LibertyCell *drvr_cell_;
const LibertyLibrary *drvr_library_;
const Parasitic *drvr_parasitic_;
bool input_port_;
const RiseFall *drvr_rf_;
// Parasitics returned by findParasitic that are reduced or estimated
// that can be deleted after delay calculation for the driver pin
// is finished.
Vector<Parasitic*> unsaved_parasitics_;
Vector<const Pin *> reduced_parasitic_drvrs_;
};
} // namespace
