// OpenSTA, Static Timing Analyzer
// Copyright (c) 2025, 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 "MinMax.hh"
#include "NetworkClass.hh"
#include "SdcClass.hh"
#include "Sta.hh"
namespace sta {
class StaState;
class CheckFanoutLimits
{
public:
CheckFanoutLimits(const Sta *sta);
void checkFanout(const Pin *pin,
const MinMax *min_max,
// Return values.
float &fanout,
float &limit,
float &slack) const;
// Return pins with the min/max fanout limit slack.
// net=null check all nets
// corner=nullptr checks all corners.
PinSeq checkFanoutLimits(const Net *net,
bool violators,
const MinMax *min_max);
protected:
float limit1,
void findLimit(const Pin *pin,
bool &limit_exists) const;
float fanoutLoad(const Pin *pin) const;
void checkFanoutLimits(const Instance *inst,
PinSeq &fanout_pins,
float &min_slack);
void checkFanoutLimits(const Pin *pin,
bool checkPin(const Pin *pin);
const Sta *sta_;
};
} // namespace
