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OpenSTA
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tweaks 

Signed-off-by: James Cherry <cherry@parallaxsw.com>
This commit is contained in:
James Cherry 2023-02-25 08:32:52 -07:00
parent 5fbe059b61
commit 830a8dbbfc
2 changed files with 13 additions and 15 deletions
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24
dcalc/DmpCeff.cc
View File

@ -265,8 +265,8 @@ protected:
double *p_;
int *index_;
// Gate slew used to check load delay.
double gate_slew_;
// Driver slew used to check load delay.
double drvr_slew_;
double vo_delay_;
// True if the driver parameters are valid for finding the load delays.
bool driver_valid_;
@ -565,9 +565,9 @@ DmpAlg::loadDelaySlew(const Pin *,
if (!driver_valid_
|| elmore == 0.0
// Elmore delay is small compared to driver slew.
|| elmore < gate_slew_ * 1e-3) {
|| elmore < drvr_slew_ * 1e-3) {
delay = elmore;
slew = gate_slew_;
slew = drvr_slew_;
}
else {
// Use the driver thresholds and rely on thresholdAdjust to
@ -591,18 +591,18 @@ DmpAlg::loadDelaySlew(const Pin *,
// Use elmore delay.
delay1 = elmore;
}
if (slew1 < gate_slew_) {
if (slew1 < drvr_slew_) {
// Only report a problem if the difference is significant.
if ((gate_slew_ - slew1) > vth_time_tol * gate_slew_)
if ((drvr_slew_ - slew1) > vth_time_tol * drvr_slew_)
fail("load slew less than driver slew");
slew1 = gate_slew_;
slew1 = drvr_slew_;
}
delay = delay1;
slew = slew1;
}
catch (DmpError &error) {
delay = elmore_;
slew = gate_slew_;
slew = drvr_slew_;
}
}
}
@ -746,7 +746,7 @@ DmpCap::gateDelaySlew(double &delay,
debugPrint(debug_, "dmp_ceff", 3, " ceff = %s",
units_->capacitanceUnit()->asString(ceff_));
gateCapDelaySlew(ceff_, delay, slew);
gate_slew_ = slew;
drvr_slew_ = slew;
}
void
@ -756,7 +756,7 @@ DmpCap::loadDelaySlew(const Pin *,
Slew &slew)
{
delay = elmore;
slew = gate_slew_;
slew = drvr_slew_;
}
void
@ -932,7 +932,7 @@ DmpPi::gateDelaySlew(double &delay,
ceff_ = c1_ + c2_;
gateCapDelaySlew(ceff_, delay, slew);
}
gate_slew_ = slew;
drvr_slew_ = slew;
}
void
@ -1223,7 +1223,7 @@ DmpZeroC2::gateDelaySlew(double &delay,
ceff_ = c1_;
gateCapDelaySlew(ceff_, delay, slew);
}
gate_slew_ = slew;
drvr_slew_ = slew;
}
double

4
search/Sta.cc
View File

@ -3962,10 +3962,8 @@ Sta::findElmore(Pin *drvr_pin,
Corner *corner = cmd_corner_;
const ParasiticAnalysisPt *ap = corner->findParasiticAnalysisPt(min_max);
Parasitic *pi_elmore = parasitics_->findPiElmore(drvr_pin, rf, ap);
if (pi_elmore) {
exists = false;
if (pi_elmore)
parasitics_->findElmore(pi_elmore, load_pin, elmore, exists);
}
else
exists = false;
}