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power: multiple output switching, unconnected internal

This commit is contained in:
James Cherry 2019-04-20 14:07:00 -07:00
parent 8ff2dc19cd
commit 47f668ffd8
2 changed files with 28 additions and 18 deletions
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43
search/Power.cc
View File

@ -129,6 +129,7 @@ Power::power(const Instance *inst,
{
MinMax *mm = MinMax::max();
const DcalcAnalysisPt *dcalc_ap = corner->findDcalcAnalysisPt(mm);
const Clock *inst_clk = findInstClk(inst);
InstancePinIterator *pin_iter = network_->pinIterator(inst);
while (pin_iter->hasNext()) {
const Pin *to_pin = pin_iter->next();
@ -138,7 +139,7 @@ Power::power(const Instance *inst,
: 0.0;
float activity1;
bool is_clk;
activity(to_pin, activity1, is_clk);
activity(to_pin, inst_clk, activity1, is_clk);
if (to_port->direction()->isAnyOutput())
findSwitchingPower(cell, to_port, activity1, load_cap,
dcalc_ap, result);
@ -149,6 +150,23 @@ Power::power(const Instance *inst,
findLeakagePower(inst, cell, result);
}
const Clock *
Power::findInstClk(const Instance *inst)
{
const Clock *inst_clk = nullptr;
InstancePinIterator *pin_iter = network_->pinIterator(inst);
while (pin_iter->hasNext()) {
const Pin *pin = pin_iter->next();
const Clock *clk = nullptr;
bool is_clk;
findClk(pin, clk, is_clk);
if (is_clk)
inst_clk = clk;
}
delete pin_iter;
return inst_clk;
}
void
Power::findInternalPower(const Instance *inst,
LibertyCell *cell,
@ -241,7 +259,7 @@ Power::findLeakagePower(const Instance *,
FuncExpr *when = leak->when();
if (when) {
FuncExprPortIterator port_iter(when);
float duty = 1.0;
float duty = 2.0;
while (port_iter.hasNext()) {
auto port = port_iter.next();
if (port->direction()->isAnyInput())
@ -279,7 +297,7 @@ Power::findLeakagePower(const Instance *,
leakage = cond_leakage;
else if (found_default)
leakage = default_leakage;
result.setLeakage(leakage);
result.setLeakage(result.leakage() + leakage);
}
void
@ -299,25 +317,17 @@ Power::findSwitchingPower(LibertyCell *cell,
activity,
volt,
switching);
result.setSwitching(switching);
}
float
Power::activity(const Pin *pin)
{
float activity1;
bool is_clk;
activity(pin, activity1, is_clk);
return activity1;
result.setSwitching(result.switching() + switching);
}
void
Power::activity(const Pin *pin,
const Clock *inst_clk,
// Return values.
float &activity,
bool &is_clk)
{
const Clock *clk;
const Clock *clk = inst_clk;
findClk(pin, clk, is_clk);
activity = 0.0;
if (clk) {
@ -326,7 +336,7 @@ Power::activity(const Pin *pin,
if (is_clk)
activity = 2.0 / period;
else
activity = default_signal_toggle_rate_ * 2.0 / period;
activity = default_signal_toggle_rate_ / period;
}
}
}
@ -352,7 +362,6 @@ Power::findClk(const Pin *to_pin,
const Clock *&clk,
bool &is_clk)
{
clk = nullptr;
is_clk = false;
Vertex *to_vertex = graph_->pinDrvrVertex(to_pin);
VertexPathIterator path_iter(to_vertex, this);
@ -388,7 +397,7 @@ PowerResult::clear()
float
PowerResult::total() const
{
return internal_ + switching_ + leakage_;
return internal_ + switching_ + leakage_;
}
void

3
search/Power.hh
View File

@ -68,15 +68,16 @@ protected:
const DcalcAnalysisPt *dcalc_ap,
// Return values.
PowerResult &result);
const Clock *findInstClk(const Instance *inst);
void findClk(const Pin *to_pin,
// Return values.
const Clock *&clk,
bool &is_clk);
void activity(const Pin *pin,
const Clock *inst_clk,
// Return values.
float &activity,
bool &is_clk);
float activity(const Pin *pin);
float voltage(LibertyCell *cell,
const LibertyPort *port,
const DcalcAnalysisPt *dcalc_ap);