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Network.cc
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Network.cc
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// OpenSTA, Static Timing Analyzer
// Copyright (c) 2022, Parallax Software, Inc.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
#include "Network.hh"
#include "StringUtil.hh"
#include "PatternMatch.hh"
#include "Liberty.hh"
#include "PortDirection.hh"
namespace sta {
Network::Network() :
default_liberty_(nullptr),
divider_('/'),
escape_('\\')
{
}
Network::~Network()
{
net_drvr_pin_map_.deleteContents();
}
void
Network::clear()
{
default_liberty_ = nullptr;
clearNetDrvrPinMap();
}
bool
Network::isLinked() const
{
return topInstance() != nullptr;
}
LibertyLibrary *
Network::libertyLibrary(const Cell *cell) const
{
return libertyCell(cell)->libertyLibrary();
}
LibertyLibrary *
Network::libertyLibrary(const Instance *instance) const
{
return libertyCell(instance)->libertyLibrary();
}
void
Network::readLibertyAfter(LibertyLibrary *)
{
}
LibertyCell *
Network::findLibertyCell(const char *name) const
{
LibertyLibraryIterator *iter = libertyLibraryIterator();
while (iter->hasNext()) {
LibertyLibrary *lib = iter->next();
LibertyCell *cell = lib->findLibertyCell(name);
if (cell) {
delete iter;
return cell;
}
}
delete iter;
return nullptr;
}
LibertyLibrary *
Network::defaultLibertyLibrary() const
{
return default_liberty_;
}
void
Network::setDefaultLibertyLibrary(LibertyLibrary *library)
{
default_liberty_ = library;
}
// Only used by Sta::setMinLibrary so linear search is acceptable.
LibertyLibrary *
Network::findLibertyFilename(const char *filename)
{
LibertyLibraryIterator *lib_iter = libertyLibraryIterator();
while (lib_iter->hasNext()) {
LibertyLibrary *lib = lib_iter->next();
if (stringEq(lib->filename(), filename)) {
delete lib_iter;
return lib;
}
}
delete lib_iter;
return nullptr;
}
LibertyCell *
Network::libertyCell(const Instance *instance) const
{
return libertyCell(cell(instance));
}
LibertyPort *
Network::libertyPort(const Pin *pin) const
{
Port *port = this->port(pin);
if (port)
return libertyPort(port);
else
return nullptr;
}
bool
Network::busIndexInRange(const Port *port,
int index)
{
int from_index = fromIndex(port);
int to_index = toIndex(port);
return (from_index <= to_index
&& index <= to_index
&& index >= from_index)
|| (from_index > to_index
&& index >= to_index
&& index <= from_index);
}
bool
Network::hasMembers(const Port *port) const
{
return isBus(port) || isBundle(port);
}
const char *
Network::pathName(const Instance *instance) const
{
ConstInstanceSeq inst_path;
path(instance, inst_path);
size_t name_length = 0;
ConstInstanceSeq::Iterator path_iter1(inst_path);
while (path_iter1.hasNext()) {
const Instance *inst = path_iter1.next();
name_length += strlen(name(inst)) + 1;
}
char *path_name = makeTmpString(name_length);
char *path_ptr = path_name;
// Top instance has null string name, so terminate the string here.
*path_name = '\0';
while (inst_path.size()) {
const Instance *inst = inst_path.back();
const char *inst_name = name(inst);
strcpy(path_ptr, inst_name);
path_ptr += strlen(inst_name);
inst_path.pop_back();
if (inst_path.size())
*path_ptr++ = pathDivider();
*path_ptr = '\0';
}
return path_name;
}
bool
Network::pathNameLess(const Instance *inst1,
const Instance *inst2) const
{
return pathNameCmp(inst1, inst2) < 0;
}
int
Network::pathNameCmp(const Instance *inst1,
const Instance *inst2) const
{
if (inst1 == nullptr && inst2)
return -1;
else if (inst1 && inst2 == nullptr)
return 1;
else if (inst1 == inst2)
return 0;
else {
ConstInstanceSeq path1;
ConstInstanceSeq path2;
path(inst1, path1);
path(inst2, path2);
while (!path1.empty() && !path2.empty()) {
const Instance *inst1 = path1.back();
const Instance *inst2 = path2.back();
int cmp = strcmp(name(inst1), name(inst2));
if (cmp != 0)
return cmp;
path1.pop_back();
path2.pop_back();
}
if (path1.empty() && !path2.empty())
return -1;
else if (path1.empty() && path2.empty())
return 0;
else
return 1;
}
}
void
Network::path(const Instance *inst,
// Return value.
ConstInstanceSeq &path) const
{
while (!isTopInstance(inst)) {
path.push_back(inst);
inst = parent(inst);
}
}
bool
Network::isTopInstance(const Instance *inst) const
{
return inst == topInstance();
}
bool
Network::isInside(const Instance *inst,
const Instance *hier_inst) const
{
while (inst) {
if (inst == hier_inst)
return true;
inst = parent(inst);
}
return false;
}
bool
Network::isHierarchical(const Instance *instance) const
{
return !isLeaf(instance);
}
////////////////////////////////////////////////////////////////
const char *
Network::name(const Pin *pin) const
{
return pathName(pin);
}
const char *
Network::portName(const Pin *pin) const
{
return name(port(pin));
}
const char *
Network::pathName(const Pin *pin) const
{
const Instance *inst = instance(pin);
if (inst && inst != topInstance()) {
const char *inst_name = pathName(inst);
size_t inst_name_length = strlen(inst_name);
const char *port_name = portName(pin);
size_t port_name_length = strlen(port_name);
size_t path_name_length = inst_name_length + port_name_length + 2;
char *path_name = makeTmpString(path_name_length);
char *path_ptr = path_name;
strcpy(path_ptr, inst_name);
path_ptr += inst_name_length;
*path_ptr++ = pathDivider();
strcpy(path_ptr, port_name);
return path_name;
}
else
return portName(pin);
}
bool
Network::pathNameLess(const Pin *pin1,
const Pin *pin2) const
{
return pathNameCmp(pin1, pin2) < 0;
}
int
Network::pathNameCmp(const Pin *pin1,
const Pin *pin2) const
{
int inst_cmp = pathNameCmp(instance(pin1), instance(pin2));
if (inst_cmp == 0)
return strcmp(portName(pin1), portName(pin2));
else
return inst_cmp;
}
bool
Network::isInside(const Net *net,
const Instance *hier_inst) const
{
return isInside(instance(net), hier_inst);
}
bool
Network::isLeaf(const Pin *pin) const
{
return isLeaf(instance(pin));
}
bool
Network::isHierarchical(const Pin *pin) const
{
return (!isLeaf(pin) && !isTopLevelPort(pin));
}
bool
Network::isTopLevelPort(const Pin *pin) const
{
return (parent(instance(pin)) == nullptr);
}
bool
Network::isInside(const Pin *pin,
const Pin *hier_pin) const
{
return isInside(pin, instance(hier_pin));
}
bool
Network::isInside(const Pin *pin,
const Instance *hier_inst) const
{
return isInside(instance(pin), hier_inst);
}
bool
Network::pinLess(const Pin *pin1,
const Pin *pin2) const
{
return pathNameLess(pin1, pin2);
}
////////////////////////////////////////////////////////////////
const char *
Network::pathName(const Net *net) const
{
const Instance *inst = instance(net);
if (inst && inst != topInstance()) {
const char *inst_name = pathName(inst);
size_t inst_name_length = strlen(inst_name);
const char *net_name = name(net);
size_t net_name_length = strlen(net_name);
size_t path_name_length = inst_name_length + net_name_length + 2;
char *path_name = makeTmpString(path_name_length);
char *path_ptr = path_name;
strcpy(path_ptr, inst_name);
path_ptr += inst_name_length;
*path_ptr++ = pathDivider();
strcpy(path_ptr, net_name);
return path_name;
}
else
return name(net);
}
bool
Network::pathNameLess(const Net *net1,
const Net *net2) const
{
return pathNameCmp(net1, net2) < 0;
}
int
Network::pathNameCmp(const Net *net1,
const Net *net2) const
{
int inst_cmp = pathNameCmp(instance(net1), instance(net2));
if (inst_cmp == 0)
return strcmp(name(net1), name(net2));
else
return inst_cmp;
}
Net *
Network::highestNetAbove(Net *net) const
{
Net *highest_net = net;
// Search up from net terminals.
NetTermIterator *term_iter = termIterator(net);
while (term_iter->hasNext()) {
Term *term = term_iter->next();
Pin *above_pin = pin(term);
if (above_pin) {
Net *above_net = this->net(above_pin);
if (above_net) {
highest_net = highestNetAbove(above_net);
break;
}
}
}
delete term_iter;
return highest_net;
}
Net *
Network::highestConnectedNet(Net *net) const
{
NetSet nets;
connectedNets(net, &nets);
Net *highest_net = net;
int highest_level = hierarchyLevel(net);
NetSet::Iterator net_iter(nets);
while (net_iter.hasNext()) {
Net *net1 = net_iter.next();
int level = hierarchyLevel(net1);
if (level < highest_level
|| (level == highest_level
&& stringLess(pathName(net1), pathName(highest_net)))) {
highest_net = net1;
highest_level = level;
}
}
return highest_net;
}
void
Network::connectedNets(Net *net,
NetSet *nets) const
{
if (!nets->hasKey(net)) {
nets->insert(net);
// Search up from net terminals.
NetTermIterator *term_iter = termIterator(net);
while (term_iter->hasNext()) {
Term *term = term_iter->next();
Pin *above_pin = pin(term);
if (above_pin) {
Net *above_net = this->net(above_pin);
if (above_net)
connectedNets(above_net, nets);
}
}
delete term_iter;
// Search down from net pins.
NetPinIterator *pin_iter = pinIterator(net);
while (pin_iter->hasNext()) {
Pin *pin1 = pin_iter->next();
Term *below_term = term(pin1);
if (below_term) {
Net *below_net = this->net(below_term);
if (below_net)
connectedNets(below_net, nets);
}
}
delete pin_iter;
}
}
void
Network::connectedNets(const Pin *pin,
NetSet *nets) const
{
Net *net = this->net(pin);
if (net)
connectedNets(net, nets);
else {
Term *term = this->term(pin);
if (term) {
Net *below_net = this->net(term);
if (below_net)
connectedNets(below_net, nets);
}
}
}
int
Network::hierarchyLevel(const Net *net) const
{
NetTermIterator *term_iter = network_->termIterator(net);
while (term_iter->hasNext()) {
Term *term = term_iter->next();
Pin *pin = network_->pin(term);
if (pin) {
Net *above_net = network_->net(pin);
if (above_net) {
delete term_iter;
return hierarchyLevel(above_net) + 1;
}
}
}
delete term_iter;
return 0;
}
bool
Network::isDriver(const Pin *pin) const
{
PortDirection *dir = direction(pin);
const Instance *inst = instance(pin);
return (isLeaf(inst) && dir->isAnyOutput())
// isTopLevelPort(pin)
|| (isTopInstance(inst) && dir->isAnyInput());
}
bool
Network::isLoad(const Pin *pin) const
{
PortDirection *dir = direction(pin);
const Instance *inst = instance(pin);
return (isLeaf(inst) && dir->isAnyInput())
// isTopLevelPort(pin)
|| (isTopInstance(inst) && dir->isAnyOutput())
// Black box unknown ports are treated as loads.
|| dir->isUnknown();
}
bool
Network::isRegClkPin(const Pin *pin) const
{
const LibertyPort *port = libertyPort(pin);
return port && port->isRegClk();
}
bool
Network::isCheckClk(const Pin *pin) const
{
const LibertyPort *port = libertyPort(pin);
return port && port->isCheckClk();
}
bool
Network::isLatchData(const Pin *pin) const
{
LibertyPort *port = libertyPort(pin);
if (port)
return port->libertyCell()->isLatchData(port);
else
return false;
}
////////////////////////////////////////////////////////////////
const char *
Network::name(const Term *term) const
{
return name(pin(term));
}
const char *
Network::pathName(const Term *term) const
{
return pathName(pin(term));
}
const char *
Network::portName(const Term *term) const
{
return portName(pin(term));
}
////////////////////////////////////////////////////////////////
const char *
Network::cellName(const Instance *inst) const
{
return name(cell(inst));
}
Instance *
Network::findInstance(const char *path_name) const
{
return findInstanceRelative(topInstance(), path_name);
}
Instance *
Network::findInstanceRelative(const Instance *inst,
const char *path_name) const
{
char *first, *tail;
pathNameFirst(path_name, first, tail);
if (first) {
Instance *inst1 = findChild(inst, first);
stringDelete(first);
while (inst1 && tail) {
char *next_tail;
pathNameFirst(tail, first, next_tail);
if (first) {
inst1 = findChild(inst1, first);
stringDelete(first);
}
else
inst1 = findChild(inst1, tail);
stringDelete(tail);
tail = next_tail;
}
stringDelete(tail);
return inst1;
}
else
return findChild(inst, path_name);
}
void
Network::findInstancesMatching(const Instance *context,
const PatternMatch *pattern,
InstanceSeq *insts) const
{
if (pattern->hasWildcards()) {
size_t context_name_length = 0;
if (context != topInstance())
// Add one for the trailing divider.
context_name_length = strlen(pathName(context)) + 1;
findInstancesMatching1(context, context_name_length, pattern, insts);
}
else {
Instance *inst = findInstanceRelative(context, pattern->pattern());
if (inst)
insts->push_back(inst);
}
}
void
Network::findInstancesMatching1(const Instance *context,
size_t context_name_length,
const PatternMatch *pattern,
InstanceSeq *insts) const
{
InstanceChildIterator *child_iter = childIterator(context);
while (child_iter->hasNext()) {
Instance *child = child_iter->next();
const char *child_name = pathName(child);
// Remove context prefix from the name.
const char *child_context_name = &child_name[context_name_length];
if (pattern->match(child_context_name))
insts->push_back(child);
if (!isLeaf(child))
findInstancesMatching1(child, context_name_length, pattern, insts);
}
delete child_iter;
}
void
Network::findInstancesHierMatching(const Instance *instance,
const PatternMatch *pattern,
// Return value.
InstanceSeq *insts) const
{
InstanceChildIterator *child_iter = childIterator(instance);
while (child_iter->hasNext()) {
Instance *child = child_iter->next();
if (pattern->match(name(child)))
insts->push_back(child);
if (!isLeaf(child))
findInstancesHierMatching(child, pattern, insts);
}
delete child_iter;
}
void
Network::findChildrenMatching(const Instance *parent,
const PatternMatch *pattern,
InstanceSeq *insts) const
{
if (pattern->hasWildcards()) {
InstanceChildIterator *child_iter = childIterator(parent);
while (child_iter->hasNext()) {
Instance *child = child_iter->next();
if (pattern->match(name(child)))
insts->push_back(child);
}
delete child_iter;
}
else {
Instance *child = findChild(parent, pattern->pattern());
if (child)
insts->push_back(child);
}
}
Pin *
Network::findPin(const char *path_name) const
{
return findPinRelative(topInstance(), path_name);
}
Pin *
Network::findPinRelative(const Instance *inst,
const char *path_name) const
{
char *inst_path, *port_name;
pathNameLast(path_name, inst_path, port_name);
if (inst_path) {
Instance *pin_inst = findInstanceRelative(inst, inst_path);
if (pin_inst) {
Pin *pin = findPin(pin_inst, port_name);
stringDelete(inst_path);
stringDelete(port_name);
return pin;
}
stringDelete(inst_path);
stringDelete(port_name);
return nullptr;
}
else
// Top level pin.
return findPin(inst, path_name);
}
Pin *
Network::findPinLinear(const Instance *instance,
const char *port_name) const
{
InstancePinIterator *pin_iter = pinIterator(instance);
while (pin_iter->hasNext()) {
Pin *pin = pin_iter->next();
if (stringEq(port_name, portName(pin))) {
delete pin_iter;
return pin;
}
}
delete pin_iter;
return nullptr;
}
Pin *
Network::findPin(const Instance *instance,
const Port *port) const
{
return findPin(instance, name(port));
}
Pin *
Network::findPin(const Instance *instance,
const LibertyPort *port) const
{
return findPin(instance, port->name());
}
Net *
Network::findNet(const char *path_name) const
{
return findNetRelative(topInstance(), path_name);
}
Net *
Network::findNetRelative(const Instance *inst,
const char *path_name) const
{
char *inst_path, *net_name;
pathNameLast(path_name, inst_path, net_name);
if (inst_path) {
Instance *net_inst = findInstanceRelative(inst, inst_path);
if (net_inst) {
Net *net = findNet(net_inst, net_name);
stringDelete(inst_path);
stringDelete(net_name);
return net;
}
stringDelete(inst_path);
stringDelete(net_name);
return nullptr;
}
else
// Top level net.
return findNet(inst, path_name);
}
Net *
Network::findNetLinear(const Instance *instance,
const char *net_name) const
{
InstanceNetIterator *net_iter = netIterator(instance);
while (net_iter->hasNext()) {
Net *net = net_iter->next();
if (stringEq(name(net), net_name)) {
delete net_iter;
return net;
}
}
delete net_iter;
return nullptr;
}
void
Network::findNetsMatching(const Instance *context,
const PatternMatch *pattern,
NetSeq *nets) const
{
if (pattern->hasWildcards()) {
char *inst_path, *net_name;
pathNameLast(pattern->pattern(), inst_path, net_name);
if (inst_path) {
PatternMatch inst_pattern(inst_path, pattern);
PatternMatch net_pattern(net_name, pattern);
InstanceSeq insts;
findInstancesMatching(context, &inst_pattern, &insts);
InstanceSeq::Iterator inst_iter(insts);
while (inst_iter.hasNext()) {
Instance *inst = inst_iter.next();
findNetsMatching(inst, &net_pattern, nets);
}
stringDelete(inst_path);
stringDelete(net_name);
}
else
// Top level net.
findInstNetsMatching(context, pattern, nets);
}
else {
Net *net = findNet(pattern->pattern());
if (net)
nets->push_back(net);
}
}
void
Network::findNetsHierMatching(const Instance *instance,
const PatternMatch *pattern,
// Return value.
NetSeq *nets) const
{
findInstNetsMatching(instance, pattern, nets);
InstanceChildIterator *child_iter = childIterator(instance);
while (child_iter->hasNext()) {
Instance *child = child_iter->next();
findNetsHierMatching(child, pattern, nets);
}
delete child_iter;
}
void
Network::findNetsMatchingLinear(const Instance *instance,
const PatternMatch *pattern,
NetSeq *nets) const
{
InstanceNetIterator *net_iter = netIterator(instance);
while (net_iter->hasNext()) {
Net *net = net_iter->next();
if (pattern->match(name(net)))
nets->push_back(net);
}
delete net_iter;
}
void
Network::findPinsMatching(const Instance *instance,
const PatternMatch *pattern,
PinSeq *pins) const
{
if (pattern->hasWildcards()) {
char *inst_path, *port_name;
pathNameLast(pattern->pattern(), inst_path, port_name);
if (inst_path) {
PatternMatch inst_pattern(inst_path, pattern);
PatternMatch port_pattern(port_name, pattern);
InstanceSeq insts;
findInstancesMatching(instance, &inst_pattern, &insts);
InstanceSeq::Iterator inst_iter(insts);
while (inst_iter.hasNext()) {
Instance *inst = inst_iter.next();
findInstPinsMatching(inst, &port_pattern, pins);
}
stringDelete(inst_path);
stringDelete(port_name);
}
else
// Top level pin.
findInstPinsMatching(instance, pattern, pins);
}
else {
Pin *pin = findPin(pattern->pattern());
if (pin)
pins->push_back(pin);
}
}
void
Network::findPinsHierMatching(const Instance *instance,
const PatternMatch *pattern,
// Return value.
PinSeq *pins) const
{
InstanceChildIterator *child_iter = childIterator(instance);
while (child_iter->hasNext()) {
Instance *child = child_iter->next();
findInstPinsHierMatching(child, pattern, pins);
findPinsHierMatching(child, pattern, pins);
}
delete child_iter;
}
void
Network::findInstPinsHierMatching(const Instance *instance,
const PatternMatch *pattern,
// Return value.
PinSeq *pins) const
{
const char *inst_name = name(instance);
InstancePinIterator *pin_iter = pinIterator(instance);
while (pin_iter->hasNext()) {
Pin *pin = pin_iter->next();
const char *port_name = name(port(pin));
string pin_name;
stringPrint(pin_name, "%s%c%s", inst_name,divider_, port_name);
if (pattern->match(pin_name.c_str()))
pins->push_back(pin);
}
delete pin_iter;
}
void
Network::findInstPinsMatching(const Instance *instance,
const PatternMatch *pattern,
PinSeq *pins) const
{
if (pattern->hasWildcards()) {
InstancePinIterator *pin_iter = pinIterator(instance);
while (pin_iter->hasNext()) {
Pin *pin = pin_iter->next();
if (pattern->match(name(pin)))
pins->push_back(pin);
}
delete pin_iter;
}
else {
Pin *pin = findPin(instance, pattern->pattern());
if (pin)
pins->push_back(pin);
}
}
void
Network::location(const Pin *,
// Return values.
double &x,
double &y,
bool &exists) const
{
x = y = 0.0;
exists = false;
}
int
Network::instanceCount(Instance *inst)
{
int count = 1;
InstanceChildIterator *child_iter = childIterator(inst);
while (child_iter->hasNext()) {
Instance *child = child_iter->next();
count += instanceCount(child);
}
delete child_iter;
return count;
}
int
Network::instanceCount()
{
return instanceCount(topInstance());
}
int
Network::pinCount(Instance *inst)
{
int count = 0;
InstancePinIterator *pin_iter = pinIterator(inst);
while (pin_iter->hasNext()) {
pin_iter->next();
count++;
}
delete pin_iter;
InstanceChildIterator *child_iter = childIterator(inst);
while (child_iter->hasNext()) {
Instance *child = child_iter->next();
count += pinCount(child);
}
delete child_iter;
return count;
}
int
Network::pinCount()
{
return pinCount(topInstance());
}
int
Network::netCount(Instance *inst)