173 lines
4.2 KiB
C++
173 lines
4.2 KiB
C++
// OpenSTA, Static Timing Analyzer
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// Copyright (c) 2024, 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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#include "UnitDelayCalc.hh"
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#include "Units.hh"
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namespace sta {
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ArcDelayCalc *
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makeUnitDelayCalc(StaState *sta)
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{
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return new UnitDelayCalc(sta);
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}
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UnitDelayCalc::UnitDelayCalc(StaState *sta) :
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ArcDelayCalc(sta)
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{
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}
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ArcDelayCalc *
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UnitDelayCalc::copy()
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{
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return new UnitDelayCalc(this);
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}
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Parasitic *
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UnitDelayCalc::findParasitic(const Pin *,
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const RiseFall *,
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const DcalcAnalysisPt *)
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{
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return nullptr;
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}
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Parasitic *
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UnitDelayCalc::reduceParasitic(const Parasitic *,
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const Pin *,
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const RiseFall *,
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const DcalcAnalysisPt *)
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{
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return nullptr;
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}
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void
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UnitDelayCalc::reduceParasitic(const Parasitic *,
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const Net *,
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const Corner *,
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const MinMaxAll *)
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{
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}
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void
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UnitDelayCalc::setDcalcArgParasiticSlew(ArcDcalcArg &,
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const DcalcAnalysisPt *)
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{
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}
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void
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UnitDelayCalc::setDcalcArgParasiticSlew(ArcDcalcArgSeq &,
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const DcalcAnalysisPt *)
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{
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}
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ArcDcalcResult
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UnitDelayCalc::inputPortDelay(const Pin *,
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float,
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const RiseFall *,
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const Parasitic *,
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const LoadPinIndexMap &load_pin_index_map,
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const DcalcAnalysisPt *)
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{
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return unitDelayResult(load_pin_index_map);
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}
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ArcDcalcResult
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UnitDelayCalc::gateDelay(const Pin *,
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const TimingArc *,
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const Slew &,
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float,
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const Parasitic *,
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const LoadPinIndexMap &load_pin_index_map,
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const DcalcAnalysisPt *)
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{
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return unitDelayResult(load_pin_index_map);
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}
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ArcDcalcResultSeq
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UnitDelayCalc::gateDelays(ArcDcalcArgSeq &dcalc_args,
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const LoadPinIndexMap &load_pin_index_map,
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const DcalcAnalysisPt *)
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{
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size_t drvr_count = dcalc_args.size();
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ArcDcalcResultSeq dcalc_results(drvr_count);
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for (size_t drvr_idx = 0; drvr_idx < drvr_count; drvr_idx++) {
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ArcDcalcResult &dcalc_result = dcalc_results[drvr_idx];
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dcalc_result = unitDelayResult(load_pin_index_map);
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}
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return dcalc_results;
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}
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ArcDcalcResult
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UnitDelayCalc::unitDelayResult(const LoadPinIndexMap &load_pin_index_map)
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{
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size_t load_count = load_pin_index_map.size();
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ArcDcalcResult dcalc_result(load_count);
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dcalc_result.setGateDelay(units_->timeUnit()->scale());
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dcalc_result.setDrvrSlew(0.0);
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for (size_t load_idx = 0; load_idx < load_count; load_idx++) {
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dcalc_result.setWireDelay(load_idx, 0.0);
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dcalc_result.setLoadSlew(load_idx, 0.0);
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}
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return dcalc_result;
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}
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string
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UnitDelayCalc::reportGateDelay(const Pin *,
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const TimingArc *,
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const Slew &,
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float,
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const Parasitic *,
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const LoadPinIndexMap &,
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const DcalcAnalysisPt *,
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int)
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{
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string result("Delay = 1.0\n");
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result += "Slew = 0.0\n";
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return result;
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}
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ArcDelay
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UnitDelayCalc::checkDelay(const Pin *,
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const TimingArc *,
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const Slew &,
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const Slew &,
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float,
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const DcalcAnalysisPt *)
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{
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return units_->timeUnit()->scale();
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}
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string
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UnitDelayCalc::reportCheckDelay(const Pin *,
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const TimingArc *,
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const Slew &,
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const char *,
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const Slew &,
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float,
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const DcalcAnalysisPt *,
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int)
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{
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return "Check = 1.0\n";
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}
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void
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UnitDelayCalc::finishDrvrPin()
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{
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}
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} // namespace
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