88 lines
3.3 KiB
C++
88 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 "ArcDelayCalc.hh"
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namespace sta {
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class GateTableModel;
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// ArcDelayCalc helper functions.
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class DelayCalcBase : public ArcDelayCalc
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{
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public:
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explicit DelayCalcBase(StaState *sta);
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void finishDrvrPin() override;
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void reduceParasitic(const Parasitic *parasitic_network,
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const Net *net,
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const Corner *corner,
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const MinMaxAll *min_max) override;
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void setDcalcArgParasiticSlew(ArcDcalcArg &gate,
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const DcalcAnalysisPt *dcalc_ap) override;
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void setDcalcArgParasiticSlew(ArcDcalcArgSeq &gates,
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const DcalcAnalysisPt *dcalc_ap) override;
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ArcDelay checkDelay(const Pin *check_pin,
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const TimingArc *arc,
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const Slew &from_slew,
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const Slew &to_slew,
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float related_out_cap,
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const DcalcAnalysisPt *dcalc_ap) override;
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std::string reportCheckDelay(const Pin *check_pin,
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const TimingArc *arc,
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const Slew &from_slew,
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const char *from_slew_annotation,
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const Slew &to_slew,
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float related_out_cap,
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const DcalcAnalysisPt *dcalc_ap,
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int digits) override;
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protected:
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// Find the liberty library to use for logic/slew thresholds.
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LibertyLibrary *thresholdLibrary(const Pin *load_pin);
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// Adjust load_delay and load_slew from driver thresholds to load thresholds.
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void thresholdAdjust(const Pin *load_pin,
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const LibertyLibrary *drvr_library,
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const RiseFall *rf,
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ArcDelay &load_delay,
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Slew &load_slew);
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// Helper function for input ports driving dspf parasitic.
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void dspfWireDelaySlew(const Pin *load_pin,
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const RiseFall *rf,
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Slew drvr_slew,
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float elmore,
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// Return values.
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ArcDelay &wire_delay,
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Slew &load_slew);
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const Pvt *pinPvt(const Pin *pin,
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const DcalcAnalysisPt *dcalc_ap);
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using ArcDelayCalc::reduceParasitic;
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};
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} // namespace
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