101 lines
2.7 KiB
C++
101 lines
2.7 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.hh"
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#include "LibertyClass.hh"
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namespace sta {
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class WireloadForArea;
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typedef std::pair<float,float> FanoutLength;
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typedef Vector<FanoutLength*> FanoutLengthSeq;
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typedef Vector<WireloadForArea*> WireloadForAreaSeq;
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const char *
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wireloadTreeString(WireloadTree tree);
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WireloadTree
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stringWireloadTree(const char *tree);
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const char *
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wireloadModeString(WireloadMode wire_load_mode);
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WireloadMode
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stringWireloadMode(const char *wire_load_mode);
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class Wireload
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{
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public:
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Wireload(const char *name,
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LibertyLibrary *library);
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Wireload(const char *name,
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LibertyLibrary *library,
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float area,
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float resistance,
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float capacitance,
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float slope);
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virtual ~Wireload();
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const char *name() const { return name_; }
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void setArea(float area);
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void setResistance(float res);
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void setCapacitance(float cap);
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void setSlope(float slope);
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void addFanoutLength(float fanout,
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float length);
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// Find wireload resistance/capacitance for fanout.
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virtual void findWireload(float fanout,
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const OperatingConditions *op_cond,
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float &cap,
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float &res) const;
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protected:
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const char *name_;
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LibertyLibrary *library_;
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float area_;
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float resistance_;
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float capacitance_;
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// Fanout length extrapolation slope.
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float slope_;
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FanoutLengthSeq fanout_lengths_;
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};
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class WireloadSelection
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{
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public:
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explicit WireloadSelection(const char *name);
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~WireloadSelection();
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const char *name() const { return name_; }
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void addWireloadFromArea(float min_area,
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float max_area,
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const Wireload *wireload);
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const Wireload *findWireload(float area) const;
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private:
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const char *name_;
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WireloadForAreaSeq wireloads_;
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};
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} // namespace
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