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ccs ceff pocv

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Signed-off-by: James Cherry <cherry@parallaxsw.com>
This commit is contained in:
James Cherry
2026-03-22 19:34:59 -07:00
parent ed19ed80df
commit 04f4528c2c
2 changed files with 33 additions and 40 deletions
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64
dcalc/CcsCeffDelayCalc.cc
View File

@@ -87,7 +87,7 @@ CcsCeffDelayCalc::gateDelay(const Pin *drvr_pin,
parasitic_ = parasitic;
output_waveforms_ = nullptr;
GateTableModel *table_model = arc->gateTableModel(scene, min_max);
const GateTableModel *table_model = arc->gateTableModel(scene, min_max);
if (table_model && parasitic) {
OutputWaveforms *output_waveforms = table_model->outputWaveforms();
Parasitics *parasitics = scene->parasitics(min_max);
@@ -112,12 +112,36 @@ CcsCeffDelayCalc::gateDelay(const Pin *drvr_pin,
drvr_cell->ensureVoltageWaveforms(scenes_);
output_waveforms_ = output_waveforms;
ref_time_ = output_waveforms_->referenceTime(in_slew_);
debugPrint(debug_, "ccs_dcalc", 1, "{} {}", drvr_cell->name(),
debugPrint(debug_, "ccs_dcalc", 1, "{} {}",
drvr_cell->name(),
drvr_rf_->shortName());
double gate_delay, drvr_slew;
gateDelaySlew(drvr_library, drvr_rf_, gate_delay, drvr_slew);
return makeResult(drvr_library, drvr_rf_, gate_delay, drvr_slew,
load_pin_index_map);
gateDelaySlew(drvr_library, gate_delay, drvr_slew);
debugPrint(debug_, "ccs_dcalc", 2, "gate_delay {} drvr_slew {}",
delayAsString(gate_delay, this), delayAsString(drvr_slew, this));
// Fill in pocv parameters.
ArcDelay gate_delay2(gate_delay);
Slew drvr_slew2(drvr_slew);
if (variables_->pocvEnabled()) {
double ceff = region_ceff_[0];
const Pvt *pvt = pinPvt(drvr_pin_, scene, min_max);
table_model->gateDelayPocv(pvt, in_slew_, ceff, min_max,
variables_->pocvMode(),
gate_delay2, drvr_slew2);
}
ArcDcalcResult dcalc_result(load_pin_index_map.size());
dcalc_result.setGateDelay(gate_delay2);
dcalc_result.setDrvrSlew(drvr_slew2);
for (const auto &[load_pin, load_idx] : load_pin_index_map) {
double wire_delay, load_slew;
loadDelaySlew(load_pin, drvr_library, drvr_slew, wire_delay, load_slew);
dcalc_result.setWireDelay(load_idx, wire_delay);
dcalc_result.setLoadSlew(load_idx, load_slew);
}
return dcalc_result;
}
}
return table_dcalc_->gateDelay(drvr_pin, arc, in_slew, load_cap, parasitic,
@@ -126,12 +150,11 @@ CcsCeffDelayCalc::gateDelay(const Pin *drvr_pin,
void
CcsCeffDelayCalc::gateDelaySlew(const LibertyLibrary *drvr_library,
const RiseFall *rf,
// Return values.
double &gate_delay,
double &drvr_slew)
{
initRegions(drvr_library, rf);
initRegions(drvr_library, drvr_rf_);
findCsmWaveform();
ref_time_ = output_waveforms_->referenceTime(in_slew_);
gate_delay = region_times_[region_vth_idx_] - ref_time_;
@@ -300,33 +323,10 @@ CcsCeffDelayCalc::findCsmWaveform()
////////////////////////////////////////////////////////////////
ArcDcalcResult
CcsCeffDelayCalc::makeResult(const LibertyLibrary *drvr_library,
const RiseFall *rf,
double &gate_delay,
double &drvr_slew,
const LoadPinIndexMap &load_pin_index_map)
{
ArcDcalcResult dcalc_result(load_pin_index_map.size());
debugPrint(debug_, "ccs_dcalc", 2, "gate_delay {} drvr_slew {}",
delayAsString(gate_delay, this), delayAsString(drvr_slew, this));
dcalc_result.setGateDelay(gate_delay);
dcalc_result.setDrvrSlew(drvr_slew);
for (const auto &[load_pin, load_idx] : load_pin_index_map) {
double wire_delay, load_slew;
loadDelaySlew(load_pin, drvr_library, rf, drvr_slew, wire_delay, load_slew);
dcalc_result.setWireDelay(load_idx, wire_delay);
dcalc_result.setLoadSlew(load_idx, load_slew);
}
return dcalc_result;
}
void
CcsCeffDelayCalc::loadDelaySlew(const Pin *load_pin,
const LibertyLibrary *drvr_library,
const RiseFall *rf,
double &drvr_slew,
double drvr_slew,
// Return values.
double &wire_delay,
double &load_slew)
@@ -349,7 +349,7 @@ CcsCeffDelayCalc::loadDelaySlew(const Pin *load_pin,
else
loadDelaySlew(load_pin, drvr_slew, elmore, wire_delay, load_slew);
thresholdAdjust(load_pin, drvr_library, rf, wire_delay, load_slew);
thresholdAdjust(load_pin, drvr_library, drvr_rf_, wire_delay, load_slew);
}
void

9
dcalc/CcsCeffDelayCalc.hh
View File

@@ -71,22 +71,15 @@ protected:
typedef std::vector<double> Region;
void gateDelaySlew(const LibertyLibrary *drvr_library,
const RiseFall *rf,
// Return values.
double &gate_delay,
double &drvr_slew);
void initRegions(const LibertyLibrary *drvr_library,
const RiseFall *rf);
void findCsmWaveform();
ArcDcalcResult makeResult(const LibertyLibrary *drvr_library,
const RiseFall *rf,
double &gate_delay,
double &drvr_slew,
const LoadPinIndexMap &load_pin_index_map);
void loadDelaySlew(const Pin *load_pin,
const LibertyLibrary *drvr_library,
const RiseFall *rf,
double &drvr_slew,
double drvr_slew,
// Return values.
double &wire_delay,
double &load_slew);