121 lines
4.0 KiB
C++
121 lines
4.0 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 <map>
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#include "LibertyClass.hh"
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#include "SdcClass.hh"
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#include "SearchClass.hh"
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#include "StaState.hh"
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#include "RiseFallMinMax.hh"
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namespace sta {
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class Sta;
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class LibertyBuilder;
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class OutputDelays
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{
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public:
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OutputDelays();
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TimingSense timingSense() const;
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RiseFallMinMax delays;
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// input edge -> output edge path exists for unateness
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bool rf_path_exists[RiseFall::index_count][RiseFall::index_count];
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};
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typedef std::map<const ClockEdge*, RiseFallMinMax> ClockEdgeDelays;
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typedef std::map<const Pin *, OutputDelays> OutputPinDelays;
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class MakeTimingModel : public StaState
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{
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public:
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MakeTimingModel(const char *lib_name,
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const char *cell_name,
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const char *filename,
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const Corner *corner,
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Sta *sta);
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~MakeTimingModel();
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LibertyLibrary *makeTimingModel();
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private:
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void makeLibrary();
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void makeCell();
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float findArea();
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void makePorts();
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void checkClock(Clock *clk);
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void findTimingFromInputs();
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void findTimingFromInput(Port *input_port);
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void findClkedOutputPaths();
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void findClkTreeDelays();
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void makeClkTreePaths(LibertyPort *lib_port,
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const MinMax *min_max,
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TimingSense sense,
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const ClkDelays &delays);
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void findOutputDelays(const RiseFall *input_rf,
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OutputPinDelays &output_pin_delays);
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void makeSetupHoldTimingArcs(const Pin *input_pin,
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const ClockEdgeDelays &clk_margins);
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void makeInputOutputTimingArcs(const Pin *input_pin,
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OutputPinDelays &output_pin_delays);
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TimingModel *makeScalarCheckModel(float value,
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ScaleFactorType scale_factor_type,
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const RiseFall *rf);
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TimingModel *makeGateModelScalar(Delay delay,
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Slew slew,
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const RiseFall *rf);
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TimingModel *makeGateModelScalar(Delay delay,
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const RiseFall *rf);
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TimingModel *makeGateModelTable(const Pin *output_pin,
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Delay delay,
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const RiseFall *rf);
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TableTemplate *ensureTableTemplate(const TableTemplate *drvr_template,
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TableAxisPtr load_axis);
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const TableAxis *loadCapacitanceAxis(const TableModel *table);
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LibertyPort *modelPort(const Pin *pin);
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void saveSdc();
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void restoreSdc();
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void swapSdcWithBackup();
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const char *lib_name_;
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const char *cell_name_;
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const char *filename_;
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const Corner *corner_;
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LibertyLibrary *library_;
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LibertyCell *cell_;
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const MinMax *min_max_;
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LibertyBuilder *lib_builder_;
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// Output driver table model template to model template.
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Map<const TableTemplate*, TableTemplate*> template_map_;
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int tbl_template_index_;
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Sdc *sdc_backup_;
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Sta *sta_;
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};
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} // namespace
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