70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
// OpenSTA, Static Timing Analyzer
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// Copyright (c) 2020, 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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#pragma once
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#include "Map.hh"
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#include "Set.hh"
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#include "StaState.hh"
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#include "NetworkClass.hh"
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#include "GraphClass.hh"
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#include "SdcClass.hh"
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namespace sta {
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typedef Map<const Pin*, ClockSet> PinClksMap;
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typedef Map<const Clock *, PinSet> ClkPinsMap;
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class Sta;
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// Find clock network pins.
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// This is not as reliable as Search::isClock but is much cheaper.
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class ClkNetwork : public StaState
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{
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public:
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ClkNetwork(StaState *sta);
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void ensureClkNetwork();
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void clear();
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bool isClock(const Pin *pin) const;
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bool isClock(const Net *net) const;
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bool isIdealClock(const Pin *pin) const;
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const ClockSet *clocks(const Pin *pin);
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const ClockSet *idealClocks(const Pin *pin);
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const PinSet *pins(const Clock *clk);
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void clkPinsInvalid();
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protected:
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void deletePinBefore(const Pin *pin);
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void connectPinAfter(const Pin *pin);
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void disconnectPinBefore(const Pin *pin);
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friend class Sta;
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private:
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void findClkPins();
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void findClkPins(bool ideal_only,
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PinClksMap &clk_pin_map);
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bool clk_pins_valid_;
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// pin -> clks
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PinClksMap pin_clks_map_;
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// pin -> ideal clks
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PinClksMap pin_ideal_clks_map_;
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// clock -> pins
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ClkPinsMap clk_pins_map_;
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};
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} // namespace
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