86 lines
3.1 KiB
C++
86 lines
3.1 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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#include <memory>
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#include "ArcDcalcWaveforms.hh"
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#include "Report.hh"
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#include "Liberty.hh"
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#include "Network.hh"
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#include "Graph.hh"
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#include "ArcDelayCalc.hh"
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#include "DcalcAnalysisPt.hh"
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#include "GraphDelayCalc.hh"
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namespace sta {
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using std::make_shared;
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Waveform
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ArcDcalcWaveforms::inputWaveform(ArcDcalcArg &dcalc_arg,
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const DcalcAnalysisPt *dcalc_ap,
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const StaState *sta)
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{
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const Network *network = sta->network();
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Graph *graph = sta->graph();
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Report *report = sta->report();
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const Pin *in_pin = dcalc_arg.inPin();
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LibertyPort *port = network->libertyPort(in_pin);
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if (port) {
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const RiseFall *in_rf = dcalc_arg.inEdge();
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DriverWaveform *driver_waveform = port->driverWaveform(in_rf);
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if (driver_waveform) {
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const Vertex *in_vertex = graph->pinLoadVertex(in_pin);
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GraphDelayCalc *graph_dcalc = sta->graphDelayCalc();
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Slew in_slew = graph_dcalc->edgeFromSlew(in_vertex, in_rf,
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dcalc_arg.arc()->role(), dcalc_ap);
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LibertyLibrary *library = port->libertyLibrary();
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float vdd;
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bool vdd_exists;
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library->supplyVoltage("VDD", vdd, vdd_exists);
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if (!vdd_exists)
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report->error(1751, "VDD not defined in library %s", library->name());
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Waveform in_waveform = driver_waveform->waveform(delayAsFloat(in_slew));
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// Delay time axis.
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FloatSeq *time_values = new FloatSeq;
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for (float time : *in_waveform.axis1()->values())
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time_values->push_back(time + dcalc_arg.inputDelay());
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TableAxisPtr time_axis = make_shared<TableAxis>(TableAxisVariable::time, time_values);
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// Scale the waveform from 0:vdd.
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FloatSeq *scaled_values = new FloatSeq;
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for (float value : *in_waveform.values()) {
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float scaled_value = (in_rf == RiseFall::rise())
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? value * vdd
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: (1.0 - value) * vdd;
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scaled_values->push_back(scaled_value);
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}
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return Waveform(scaled_values, time_axis);
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}
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}
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return Waveform();
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}
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} // namespace
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