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delay calc input port spef delay 

Signed-off-by: James Cherry <cherry@parallaxsw.com>
This commit is contained in:
James Cherry 2023-10-01 11:39:41 -07:00
parent 8dbe2b7ef5
commit 6708246ba5
3 changed files with 5 additions and 28 deletions
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22
dcalc/DmpDelayCalc.cc
View File

@ -99,17 +99,8 @@ DmpCeffElmoreDelayCalc::loadDelay(const Pin *load_pin,
if (drvr_parasitic_)
parasitics_->findElmore(drvr_parasitic_, load_pin, elmore, elmore_exists);
if (elmore_exists) {
if (input_port_) {
// Input port with no external driver.
if (parasitics_->isReducedParasiticNetwork(drvr_parasitic_))
dspfWireDelaySlew(load_pin, elmore, wire_delay1, load_slew1);
else {
// The elmore delay on an input port is used for the wire
// delay and the load slew is the same as the driver slew.
wire_delay1 = elmore;
load_slew1 = drvr_slew_;
}
}
if (input_port_)
dspfWireDelaySlew(load_pin, elmore, wire_delay1, load_slew1);
else
loadDelaySlew(load_pin, elmore, wire_delay1, load_slew1);
}
@ -322,14 +313,7 @@ DmpCeffTwoPoleDelayCalc::loadDelay(const Pin *load_pin,
if (input_port_) {
float elmore = 1.0F / p1;
// Input port with no external driver.
if (parasitics_->isReducedParasiticNetwork(drvr_parasitic_))
dspfWireDelaySlew(load_pin, elmore, wire_delay1, load_slew1);
else {
// For RSPF on an input port the elmore delay is used for the
// wire delay and the load slew is the same as the driver slew.
wire_delay1 = elmore;
load_slew1 = drvr_slew_;
}
dspfWireDelaySlew(load_pin, elmore, wire_delay1, load_slew1);
}
else {
if (pole_count >= 2)

2
dcalc/LumpedCapDelayCalc.cc
View File

@ -56,7 +56,7 @@ LumpedCapDelayCalc::findParasitic(const Pin *drvr_pin,
const DcalcAnalysisPt *dcalc_ap)
{
const Corner *corner = dcalc_ap->corner();
// set_load has precidence over parasitics.
// set_load net has precidence over parasitics.
if (!sdc_->drvrPinHasWireCap(drvr_pin, corner)) {
Parasitic *parasitic = nullptr;
const ParasiticAnalysisPt *parasitic_ap = dcalc_ap->parasiticAnalysisPt();

9
dcalc/SlewDegradeDelayCalc.cc
View File

@ -134,14 +134,7 @@ SlewDegradeDelayCalc::loadDelay(const Pin *load_pin,
delayAsFloat(drvr_slew_),
delayAsFloat(wire_delay1));
}
else if (parasitics_->isReducedParasiticNetwork(drvr_parasitic_))
dspfWireDelaySlew(load_pin, elmore, wire_delay1, load_slew1);
else {
// For RSPF on an input port the elmore delay is used for the
// wire delay and the slew is copied from the driver.
wire_delay1 = elmore;
load_slew1 = drvr_slew_;
}
dspfWireDelaySlew(load_pin, elmore, wire_delay1, load_slew1);
}
thresholdAdjust(load_pin, wire_delay1, load_slew1);
wire_delay = wire_delay1;