88 lines
2.9 KiB
C++
88 lines
2.9 KiB
C++
// OpenSTA, Static Timing Analyzer
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// Copyright (c) 2025, 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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//
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// The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software.
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//
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// Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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//
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// This notice may not be removed or altered from any source distribution.
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#pragma once
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#include <string>
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#include "Delay.hh"
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#include "LibertyClass.hh"
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namespace sta {
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// Abstract base class for GateTimingModel and CheckTimingModel.
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class TimingModel
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{
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public:
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TimingModel(LibertyCell *cell);
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virtual ~TimingModel() {}
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virtual void setIsScaled(bool is_scaled) = 0;
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protected:
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LibertyCell *cell_;
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};
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// Abstract base class for LinearModel and TableModel.
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class GateTimingModel : public TimingModel
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{
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public:
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GateTimingModel(LibertyCell *cell);
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// Gate delay calculation.
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virtual void gateDelay(const Pvt *pvt,
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float in_slew,
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float load_cap,
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bool pocv_enabled,
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// Return values.
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ArcDelay &gate_delay,
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Slew &drvr_slew) const = 0;
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virtual std::string reportGateDelay(const Pvt *pvt,
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float in_slew,
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float load_cap,
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bool pocv_enabled,
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int digits) const = 0;
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virtual float driveResistance(const Pvt *pvt) const = 0;
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};
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// Abstract base class for timing check timing models.
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class CheckTimingModel : public TimingModel
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{
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public:
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CheckTimingModel(LibertyCell *cell);
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// Timing check margin delay calculation.
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virtual ArcDelay checkDelay(const Pvt *pvt,
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float from_slew,
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float to_slew,
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float related_out_cap,
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bool pocv_enabled) const = 0;
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virtual std::string reportCheckDelay(const Pvt *pvt,
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float from_slew,
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const char *from_slew_annotation,
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float to_slew,
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float related_out_cap,
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bool pocv_enabled,
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int digits) const = 0;
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};
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} // namespace
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