106 lines
3.3 KiB
C++
106 lines
3.3 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 "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 "Sta.hh"
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namespace sta {
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class StaState;
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class Corner;
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class CheckCapacitanceLimits
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{
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public:
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CheckCapacitanceLimits(const Sta *sta);
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// corner=nullptr checks all corners.
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void checkCapacitance(const Pin *pin,
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const Corner *corner1,
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const MinMax *min_max,
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// Return values.
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// Corner is nullptr for no capacitance limit.
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const Corner *&corner,
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const RiseFall *&rf,
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float &capacitance,
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float &limit,
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float &slack) const;
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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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// corner=nullptr checks all corners.
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PinSeq checkCapacitanceLimits(const Net *net,
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bool violators,
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const Corner *corner,
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const MinMax *min_max);
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protected:
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void checkCapacitance(const Pin *pin,
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const Corner *corner,
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const MinMax *min_max,
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const RiseFall *rf,
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float limit,
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// Return values.
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const Corner *&corner1,
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const RiseFall *&rf1,
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float &capacitance1,
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float &slack1,
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float &limit1) const;
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void checkCapacitance1(const Pin *pin,
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const Corner *corner,
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const MinMax *min_max,
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// Return values.
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const Corner *&corner1,
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const RiseFall *&rf1,
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float &capacitance1,
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float &limit1,
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float &slack1) const;
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void findLimit(const Pin *pin,
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const Corner *corner,
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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 Corner *corner,
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const MinMax *min_max,
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PinSeq &cap_pins,
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float &min_slack);
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void checkCapLimits(const Pin *pin,
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bool violators,
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const Corner *corner,
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const MinMax *min_max,
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PinSeq &cap_pins,
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float &min_slack);
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bool checkPin(const Pin *pin);
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const Sta *sta_;
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};
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} // namespace
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