99 lines
2.6 KiB
C++
99 lines
2.6 KiB
C++
// OpenSTA, Static Timing Analyzer
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// Copyright (c) 2018, 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_DELAY_FLOAT_CLASS_H
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#define STA_DELAY_FLOAT_CLASS_H
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#include "MinMax.hh"
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namespace sta {
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// Delay values defined as class objects that hold a float value.
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// This is really a trial balloon for delay values as objects
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// instead of simple floats.
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class Delay
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{
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public:
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Delay();
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Delay(float delay);
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float delay() const { return delay_; }
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void operator=(const Delay &delay);
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void operator=(float delay);
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void operator+=(const Delay &delay);
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void operator+=(float delay);
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Delay operator+(const Delay &delay) const;
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Delay operator+(float delay) const;
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Delay operator-(const Delay &delay) const;
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Delay operator-(float delay) const;
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Delay operator-() const;
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void operator-=(float delay);
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bool operator==(const Delay &delay) const;
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bool operator>(const Delay &delay) const;
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bool operator>=(const Delay &delay) const;
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bool operator<(const Delay &delay) const;
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bool operator<=(const Delay &delay) const;
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private:
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float delay_;
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};
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const Delay delay_zero(0.0);
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inline Delay
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makeDelay(float delay,
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float,
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float)
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{
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return Delay(delay);
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}
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inline float
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delayAsFloat(const Delay &delay) { return delay.delay(); }
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// Most non-operator functions on Delay are not defined as member
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// functions so they can be defined on floats, where there is no class
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// to define them.
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Delay operator+(float delay1,
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const Delay &delay2);
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Delay operator-(float delay1,
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const Delay &delay2);
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// Used for parallel gate delay calc.
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Delay operator/(float delay1,
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const Delay &delay2);
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// Used for parallel gate delay calc.
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Delay operator*(const Delay &delay2,
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float delay1);
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Delay operator*(const Delay &delay1,
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float delay2);
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bool
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delayFuzzyLess(const Delay &delay1,
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float delay2);
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bool
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delayFuzzyLessEqual(const Delay &delay1,
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float delay2);
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bool
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delayFuzzyGreater(const Delay &delay1,
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float delay2);
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bool
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delayFuzzyGreaterEqual(const Delay &delay1,
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float delay2);
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} // namespace
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#endif
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