129 lines
4.2 KiB
C++
129 lines
4.2 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 <vector>
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#include "MinMax.hh"
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#include "Transition.hh"
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#include "NetworkClass.hh"
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#include "SdcClass.hh"
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#include "StaState.hh"
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#include "BoundedHeap.hh"
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namespace sta {
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class StaState;
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class Scene;
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class RiseFall;
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class CapacitanceCheckSlackLess;
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class CapacitanceCheck
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{
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public:
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CapacitanceCheck();
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CapacitanceCheck(const Pin *pin,
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float capacitance,
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float limit,
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float slack,
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const Scene *scene,
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const RiseFall *rf);
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bool isNull() { return pin_ == nullptr; }
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const Pin *pin() const { return pin_; }
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float capacitance() const { return capacitance_; }
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float limit() const { return limit_; }
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float slack() const { return slack_; }
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const Scene *scene() const { return scene_; }
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const RiseFall *rf() const { return rf_; }
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private:
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const Pin *pin_;
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float capacitance_;
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float limit_;
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float slack_;
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const Scene *scene_;
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const RiseFall *rf_;
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};
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using CapacitanceCheckSeq = std::vector<CapacitanceCheck>;
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using CapacitanceCheckHeap = BoundedHeap<CapacitanceCheck, CapacitanceCheckSlackLess>;
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class CheckCapacitances
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{
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public:
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CheckCapacitances(const StaState *sta);
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void clear();
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// Return pins with the min/max cap limit slack.
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// net=null check all nets
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CapacitanceCheckSeq &check(const Net *net,
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size_t max_count,
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bool violators,
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const SceneSeq &scenes,
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const MinMax *min_max);
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// Return min slack check across scenes.
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CapacitanceCheck check(const Pin *pin,
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const SceneSeq &scenes,
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const MinMax *min_max) const;
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protected:
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CapacitanceCheck check(const Pin *pin,
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bool violators,
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const SceneSeq &scenes,
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const MinMax *min_max) const;
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void findLimit(const Pin *pin,
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const Scene *scene,
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const MinMax *min_max,
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// Return values.
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float &limit,
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bool &limit_exists) const;
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void checkCapLimits(const Instance *inst,
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bool violators,
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const SceneSeq &scenes,
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const MinMax *min_max);
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void checkCapLimits(const Instance *inst,
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const SceneSeq &scenes,
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const MinMax *min_max,
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CapacitanceCheckHeap &heap);
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void check(const Pin *pin,
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const SceneSeq &scenes,
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const MinMax *min_max,
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CapacitanceCheckHeap &heap);
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CapacitanceCheckSeq &checkViolations(const Net *net,
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const SceneSeq &scenes,
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const MinMax *min_max);
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CapacitanceCheckSeq &checkMaxCount(const Net *net,
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size_t max_count,
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const SceneSeq &scenes,
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const MinMax *min_max);
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bool checkPin(const Pin *pin,
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const Scene *scene) const;
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const StaState *sta_;
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CapacitanceCheckSeq checks_;
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};
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} // namespace
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