462 lines
12 KiB
C++
462 lines
12 KiB
C++
// OpenSTA, Static Timing Analyzer
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// Copyright (c) 2019, 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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#ifndef STA_TABLE_MODEL_H
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#define STA_TABLE_MODEL_H
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#include <string>
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#include "DisallowCopyAssign.hh"
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#include "MinMax.hh"
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#include "Vector.hh"
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#include "Transition.hh"
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#include "LibertyClass.hh"
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#include "TimingModel.hh"
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namespace sta {
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using std::string;
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class Unit;
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class Units;
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class Report;
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class Table;
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TableAxisVariable
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stringTableAxisVariable(const char *variable);
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const char *
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tableVariableString(TableAxisVariable variable);
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const Unit *
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tableVariableUnit(TableAxisVariable variable,
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const Units *units);
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class GateTableModel : public GateTimingModel
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{
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public:
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GateTableModel(TableModel *delay_model,
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TableModel *delay_sigma_models[EarlyLate::index_count],
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TableModel *slew_model,
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TableModel *slew_sigma_models[EarlyLate::index_count]);
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virtual ~GateTableModel();
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virtual void gateDelay(const LibertyCell *cell,
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const Pvt *pvt,
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float in_slew,
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float load_cap,
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float related_out_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;
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virtual void reportGateDelay(const LibertyCell *cell,
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const Pvt *pvt,
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float in_slew,
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float load_cap,
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float related_out_cap,
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bool pocv_enabled,
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int digits,
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string *result) const;
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virtual float driveResistance(const LibertyCell *cell,
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const Pvt *pvt) const;
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const TableModel *delayModel() const { return delay_model_; }
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const TableModel *slewModel() const { return slew_model_; }
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// Check the axes before making the model.
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// Return true if the model axes are supported.
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static bool checkAxes(const Table *table);
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protected:
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void maxCapSlew(const LibertyCell *cell,
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float in_slew,
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const Pvt *pvt,
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float &slew,
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float &cap) const;
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virtual void setIsScaled(bool is_scaled);
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float axisValue(TableAxis *axis,
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float load_cap,
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float in_slew,
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float related_out_cap) const;
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float findValue(const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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const TableModel *model,
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float in_slew,
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float load_cap,
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float related_out_cap) const;
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void reportTableLookup(const char *result_name,
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const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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const TableModel *model,
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float in_slew,
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float load_cap,
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float related_out_cap,
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int digits,
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string *result) const;
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void findAxisValues(const TableModel *model,
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float in_slew,
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float load_cap,
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float related_out_cap,
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// Return values.
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float &axis_value1,
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float &axis_value2,
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float &axis_value3) const;
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void deleteSigmaModels(TableModel *models[EarlyLate::index_count]);
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static bool checkAxis(TableAxis *axis);
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TableModel *delay_model_;
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TableModel *delay_sigma_models_[EarlyLate::index_count];
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TableModel *slew_model_;
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TableModel *slew_sigma_models_[EarlyLate::index_count];
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private:
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DISALLOW_COPY_AND_ASSIGN(GateTableModel);
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};
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class CheckTableModel : public CheckTimingModel
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{
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public:
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explicit CheckTableModel(TableModel *model);
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virtual ~CheckTableModel();
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virtual void checkDelay(const LibertyCell *cell,
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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,
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// Return values.
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ArcDelay &margin) const;
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virtual void reportCheckDelay(const LibertyCell *cell,
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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,
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string *result) const;
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// Check the axes before making the model.
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// Return true if the model axes are supported.
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static bool checkAxes(const Table *table);
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protected:
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virtual void setIsScaled(bool is_scaled);
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float findValue(const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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const TableModel *model,
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float from_slew,
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float to_slew,
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float related_out_cap) const;
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void findAxisValues(float from_slew,
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float to_slew,
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float related_out_cap,
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// Return values.
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float &axis_value1,
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float &axis_value2,
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float &axis_value3) const;
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float axisValue(TableAxis *axis,
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float load_cap,
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float in_slew,
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float related_out_cap) const;
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void reportTableDelay(const char *result_name,
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const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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const TableModel *model,
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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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int digits,
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string *result) const;
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static bool checkAxis(TableAxis *axis);
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TableModel *model_;
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TableModel *sigma_models_[EarlyLate::index_count];
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private:
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DISALLOW_COPY_AND_ASSIGN(CheckTableModel);
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};
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// Wrapper class for Table to apply scale factors.
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class TableModel
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{
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public:
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TableModel(Table *table,
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ScaleFactorType scale_factor_type,
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TransRiseFall *tr);
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~TableModel();
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void setScaleFactorType(ScaleFactorType type);
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int order() const;
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TableAxis *axis1() const;
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TableAxis *axis2() const;
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TableAxis *axis3() const;
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void setIsScaled(bool is_scaled);
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// Table interpolated lookup.
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float findValue(float value1,
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float value2,
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float value3) const;
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// Table interpolated lookup with scale factor.
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float findValue(const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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float value1,
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float value2,
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float value3) const;
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void reportValue(const char *result_name,
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const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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float value1,
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const char *comment1,
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float value2,
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float value3,
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int digits,
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string *result) const;
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void report(const Units *units,
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Report *report) const;
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protected:
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float scaleFactor(const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt) const;
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void reportPvtScaleFactor(const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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int digits,
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string *result) const;
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Table *table_;
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// ScaleFactorType gcc barfs if this is dcl'd.
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unsigned scale_factor_type_:scale_factor_bits;
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unsigned tr_index_:TransRiseFall::index_bit_count;
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bool is_scaled_:1;
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private:
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DISALLOW_COPY_AND_ASSIGN(TableModel);
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};
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// Abstract base class for tables.
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class Table
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{
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public:
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Table() {}
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virtual ~Table() {}
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void setScaleFactorType(ScaleFactorType type);
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virtual int order() const = 0;
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virtual TableAxis *axis1() const { return nullptr; }
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virtual TableAxis *axis2() const { return nullptr; }
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virtual TableAxis *axis3() const { return nullptr; }
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void setIsScaled(bool is_scaled);
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// Table interpolated lookup.
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virtual float findValue(float value1,
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float value2,
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float value3) const = 0;
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// Table interpolated lookup with scale factor.
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float findValue(const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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float value1,
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float value2,
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float value3) const;
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virtual void reportValue(const char *result_name,
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const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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float value1,
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const char *comment1,
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float value2,
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float value3,
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int digits,
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string *result) const = 0;
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virtual void report(const Units *units,
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Report *report) const = 0;
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private:
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DISALLOW_COPY_AND_ASSIGN(Table);
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};
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// Zero dimension (scalar) table.
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class Table0 : public Table
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{
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public:
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Table0(float value);
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virtual int order() const { return 0; }
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virtual float findValue(float value1,
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float value2,
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float value3) const;
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virtual void reportValue(const char *result_name,
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const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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float value1,
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const char *comment1,
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float value2,
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float value3,
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int digits,
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string *result) const;
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virtual void report(const Units *units,
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Report *report) const;
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using Table::findValue;
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private:
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DISALLOW_COPY_AND_ASSIGN(Table0);
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float value_;
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};
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// One dimensional table.
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class Table1 : public Table
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{
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public:
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Table1(FloatSeq *values,
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TableAxis *axis1,
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bool own_axis1);
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virtual ~Table1();
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virtual int order() const { return 1; }
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virtual TableAxis *axis1() const { return axis1_; }
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float tableValue(size_t index1) const;
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virtual float findValue(float value1,
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float value2,
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float value3) const;
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virtual void reportValue(const char *result_name,
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const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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float value1,
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const char *comment1,
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float value2,
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float value3,
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int digits,
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string *result) const;
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virtual void report(const Units *units,
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Report *report) const;
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using Table::findValue;
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private:
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DISALLOW_COPY_AND_ASSIGN(Table1);
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FloatSeq *values_;
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TableAxis *axis1_;
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bool own_axis1_;
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};
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// Two dimensional table.
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class Table2 : public Table
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{
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public:
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Table2(FloatTable *values,
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TableAxis *axis1,
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bool own_axis1,
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TableAxis *axis2,
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bool own_axis2);
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virtual ~Table2();
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virtual int order() const { return 2; }
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TableAxis *axis1() const { return axis1_; }
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TableAxis *axis2() const { return axis2_; }
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float tableValue(size_t index1,
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size_t index2) const;
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virtual float findValue(float value1,
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float value2,
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float value3) const;
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virtual void reportValue(const char *result_name,
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const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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float value1,
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const char *comment1,
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float value2,
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float value3,
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int digits,
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string *result) const;
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virtual void report(const Units *units,
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Report *report) const;
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using Table::findValue;
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protected:
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DISALLOW_COPY_AND_ASSIGN(Table2);
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FloatTable *values_;
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// Row.
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TableAxis *axis1_;
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bool own_axis1_;
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// Column.
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TableAxis *axis2_;
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bool own_axis2_;
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};
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// Three dimensional table.
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class Table3 : public Table2
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{
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public:
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Table3(FloatTable *values,
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TableAxis *axis1,
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bool own_axis1,
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TableAxis *axis2,
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bool own_axis2,
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TableAxis *axis3,
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bool own_axis3);
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virtual ~Table3();
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virtual int order() const { return 3; }
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TableAxis *axis3() const { return axis3_; }
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float tableValue(size_t index1,
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size_t index2,
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size_t index3) const;
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virtual float findValue(float value1,
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float value2,
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float value3) const;
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virtual void reportValue(const char *result_name,
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const LibertyLibrary *library,
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const LibertyCell *cell,
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const Pvt *pvt,
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float value1,
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const char *comment1,
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float value2,
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float value3,
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int digits,
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string *result) const;
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virtual void report(const Units *units,
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Report *report) const;
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using Table::findValue;
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private:
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DISALLOW_COPY_AND_ASSIGN(Table3);
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TableAxis *axis3_;
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bool own_axis3_;
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};
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class TableAxis
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{
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public:
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TableAxis(TableAxisVariable variable,
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FloatSeq *values);
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~TableAxis();
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TableAxisVariable variable() const { return variable_; }
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size_t size() const { return values_->size(); }
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float axisValue(size_t index) const { return (*values_)[index]; }
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// Find the index for value such that axis[index] <= value < axis[index+1].
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size_t findAxisIndex(float value) const;
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private:
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DISALLOW_COPY_AND_ASSIGN(TableAxis);
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TableAxisVariable variable_;
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FloatSeq *values_;
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};
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} // namespace
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#endif
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