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design_dump.cc
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design_dump.cc
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/*
* Copyright (c) 1998-2000 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: design_dump.cc,v 1.76 2000/04/12 20:02:52 steve Exp $"
#endif
/*
* This file contains all the dump methods of the netlist classes.
*/
# include <typeinfo>
# include <iostream>
# include <iomanip>
# include "netlist.h"
static ostream& operator<< (ostream&o, NetBlock::Type t)
{
switch (t) {
case NetBlock::SEQU:
o << "begin";
break;
case NetBlock::PARA:
o << "fork";
break;
}
return o;
}
/* Dump a net. This can be a wire or register. */
void NetNet::dump_net(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << type() << ": " << name() << "[" <<
pin_count() << "]";
if (local_flag_)
o << " (local)";
if (scope_)
o << " scope=" << scope_->name();
o << " #(" << rise_time() << "," << fall_time() << "," <<
decay_time() << ") init=";
for (unsigned idx = pin_count() ; idx > 0 ; idx -= 1)
o << ivalue_[idx-1];
o << endl;
dump_obj_attr(o, ind+4);
}
void NetMemory::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << name_ << "[" << width_ << "] " <<
"[" << idxh_ << ":" << idxl_ << "]" << endl;
}
/* Dump a NetNode and its pins. Dump what I know about the netnode on
the first line, then list all the pins, with the name of the
connected signal. */
void NetNode::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "node: ";
o << typeid(*this).name() << " #(" << rise_time()
<< "," << fall_time() << "," << decay_time() << ") " << name()
<< endl;
dump_node_pins(o, ind+4);
dump_obj_attr(o, ind+4);
}
/* This is the generic dumping of all the signals connected to each
pin of the object. The "this" object is not printed, only the
signals connected to this. */
void NetObj::dump_node_pins(ostream&o, unsigned ind) const
{
for (unsigned idx = 0 ; idx < pin_count() ; idx += 1) {
o << setw(ind) << "" << idx << " " << pin(idx).get_name()
<< "<" << pin(idx).get_inst() << ">";
switch (pin(idx).get_dir()) {
case Link::PASSIVE:
o << " p";
break;
case Link::INPUT:
o << " I";
break;
case Link::OUTPUT:
o << " O";
break;
}
o << ":";
unsigned cpin;
const NetObj*cur;
for (pin(idx).next_link(cur, cpin)
; (cur != this) || (cpin != idx)
; cur->pin(cpin).next_link(cur, cpin)) {
const NetNet*sig = dynamic_cast<const NetNet*>(cur);
if (sig) o << " " << sig->name() << "[" << cpin << "]";
}
o << endl;
}
}
void NetObj::dump_obj_attr(ostream&o, unsigned ind) const
{
for (map<string,string>::const_iterator idx = attributes_.begin()
; idx != attributes_.end()
; idx ++) {
o << setw(ind) << "" << (*idx).first << " = \"" <<
(*idx).second << "\"" << endl;
}
}
void NetAddSub::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "Adder (NetAddSub): " << name() << endl;
dump_node_pins(o, ind+4);
dump_obj_attr(o, ind+4);
}
void NetCLShift::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "Combinatorial shift (NetCLShift): " <<
name() << endl;
dump_node_pins(o, ind+4);
dump_obj_attr(o, ind+4);
}
void NetCompare::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "LPM_COMPARE (NetCompare): " << name() << endl;
dump_node_pins(o, ind+4);
dump_obj_attr(o, ind+4);
}
void NetDivide::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "NET_DIVIDE (NetDivide): " << name() << endl;
dump_node_pins(o, ind+4);
dump_obj_attr(o, ind+4);
}
void NetMult::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "LPM_MULT (NetMult): " << name() << endl;
dump_node_pins(o, ind+4);
dump_obj_attr(o, ind+4);
}
void NetMux::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "Multiplexer (NetMux): " << name() << endl;
dump_node_pins(o, ind+4);
dump_obj_attr(o, ind+4);
}
void NetAssign::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "Procedural assign (NetAssign): " << name();
if (bmux())
o << "[" << *bmux() << "]";
o << " = " << *rval() << endl;
dump_node_pins(o, ind+4);
}
void NetAssignNB::dump_node(ostream&o, unsigned ind) const
{
if (bmux())
o << setw(ind) << "" << "Procedural NB assign (NetAssignNB): "
<< name() << "[" << *bmux() << "] <= " << *rval() << endl;
else
o << setw(ind) << "" << "Procedural NB assign (NetAssignNB): "
<< name() << " <= " << *rval() << endl;
dump_node_pins(o, ind+4);
}
void NetBUFZ::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "NetBUFZ: " << name() << endl;
dump_node_pins(o, ind+4);
}
void NetCaseCmp::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "case compare === : " << name() << endl;
dump_node_pins(o, ind+4);
}
void NetConst::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "constant ";
for (unsigned idx = pin_count() ; idx > 0 ; idx -= 1)
o << value_[idx-1];
o << ": " << name() << endl;
dump_node_pins(o, ind+4);
}
void NetFF::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "LPM_FF: " << name() << endl;
dump_node_pins(o, ind+4);
dump_obj_attr(o, ind+4);
}
void NetLogic::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "logic: ";
switch (type_) {
case AND:
o << "and";
break;
case BUF:
o << "buf";
break;
case BUFIF0:
o << "bufif0";
break;
case BUFIF1:
o << "bufif1";
break;
case NAND:
o << "nand";
break;
case NOR:
o << "nor";
break;
case NOT:
o << "not";
break;
case OR:
o << "or";
break;
case XNOR:
o << "xnor";
break;
case XOR:
o << "xor";
break;
}
o << " #(" << rise_time()
<< "," << fall_time() << "," << decay_time() << ") " << name()
<< endl;
dump_node_pins(o, ind+4);
dump_obj_attr(o, ind+4);
}
void NetRamDq::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "LPM_RAM_DQ (" << mem_->name() << "): "
<< name() << endl;
dump_node_pins(o, ind+4);
dump_obj_attr(o, ind+4);
}
void NetTaskDef::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "task " << name_ << ";" << endl;
for (unsigned idx = 0 ; idx < ports_.count() ; idx += 1) {
o << setw(ind+4) << "";
switch (ports_[idx]->port_type()) {
case NetNet::PINPUT:
o << "input ";
break;
case NetNet::POUTPUT:
o << "output ";
break;
case NetNet::PINOUT:
o << "input ";
break;
default:
o << "NOT_A_PORT ";
break;
}
o << ports_[idx]->name() << ";" << endl;
}
proc_->dump(o, ind+4);
o << setw(ind) << "" << "endtask" << endl;
}
void NetUDP::dump_sequ_(ostream&o, unsigned ind) const
{
string tmp = "";
for (unsigned idx = 0 ; idx < ind ; idx += 1)
tmp += " ";
o << tmp << "Sequential UDP" << " #(" << rise_time() <<
"," << fall_time() << "," << decay_time() << ") " << name() <<
endl;
for (FSM_::const_iterator ent = fsm_.begin()
; ent != fsm_.end() ; ent++) {
o << setw(ind+6) << "" << (*ent).first << " -->";
state_t_*st = (*ent).second;
assert((*ent).first[0] == st->out);
for (unsigned idx = 1 ; idx < pin_count() ; idx += 1) {
string tmp = (*ent).first;
if (st->pins[idx].zer) {
tmp[0] = st->pins[idx].zer->out;
tmp[idx] = '0';
o << " " << tmp;
}
if (st->pins[idx].one) {
tmp[0] = st->pins[idx].one->out;
tmp[idx] = '1';
o << " " << tmp;
}
if (st->pins[idx].xxx) {
tmp[0] = st->pins[idx].xxx->out;
tmp[idx] = 'x';
o << " " << tmp;
}
}
o << endl;
}
o << setw(ind+6) << "" << "initial value == " << init_ << endl;
dump_node_pins(o, ind+4);
dump_obj_attr(o, ind+4);
}
void NetUDP::dump_comb_(ostream&o, unsigned ind) const
{
assert(0);
}
void NetUDP::dump_node(ostream&o, unsigned ind) const
{
if (sequential_)
dump_sequ_(o, ind);
else
dump_comb_(o, ind);
}
void NetUDP_COMB::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "Combinational primitive: ";
o << " #(" << rise_time() << "," << fall_time() << "," << decay_time() <<
") " << name() << endl;
for (map<string,char>::const_iterator ent = cm_.begin()
; ent != cm_.end() ; ent++) {
o << setw(ind+6) << "" << (*ent).first << " --> " <<
(*ent).second << endl;
}
dump_node_pins(o, ind+4);
dump_obj_attr(o, ind+4);
}
void NetProcTop::dump(ostream&o, unsigned ind) const
{
switch (type_) {
case NetProcTop::KINITIAL:
o << "initial /* " << get_line() << " */" << endl;
break;
case NetProcTop::KALWAYS:
o << "always /* " << get_line() << " */" << endl;
break;
}
statement_->dump(o, ind+2);
}
/* Dump an assignment statement */
void NetAssign::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "";
if (bmux()) {
o << name() << "[" << *bmux() << "] = ";
if (rise_time())
o << "#" << rise_time() << " ";
o << *rval() << ";" << endl;
} else {
o << name() << " = ";
if (rise_time())
o << "#" << rise_time() << " ";
o << *rval() << ";" << endl;
}
}
void NetAssignNB::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "";
if (bmux()) {
o << name() << "[" << *bmux() << "] <= ";
if (rise_time())
o << "#" << rise_time() << " ";
o << *rval() << ";" << endl;
} else {
o << name() << " <= ";
if (rise_time())
o << "#" << rise_time() << " ";
o << *rval() << ";" << endl;
}
}
void NetAssignMem::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "";
o << "/* " << get_line() << " */" << endl;
o << setw(ind) << "";
o << memory()->name() << "[" << index()->name() << "] = ";
rval()->dump(o);
o << ";" << endl;
}
void NetAssignMemNB::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "";
o << "/* " << get_line() << " */" << endl;
o << setw(ind) << "";
o << memory()->name() << "[" << index()->name() << "] <= ";
rval()->dump(o);
o << ";" << endl;
}
/* Dump a block statement */
void NetBlock::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << type_ << endl;
if (last_) {
const NetProc*cur = last_;
do {
cur = cur->next_;
cur->dump(o, ind+4);
} while (cur != last_);
}
o << setw(ind) << "" << "end" << endl;
}
void NetCase::dump(ostream&o, unsigned ind) const
{
switch (type_) {
case EQ:
o << setw(ind) << "" << "case (" << *expr_ << ")" << endl;
break;
case EQX:
o << setw(ind) << "" << "casex (" << *expr_ << ")" << endl;
break;
case EQZ:
o << setw(ind) << "" << "casez (" << *expr_ << ")" << endl;
break;
}
for (unsigned idx = 0 ; idx < nitems_ ; idx += 1) {
o << setw(ind+2) << "";
if (items_[idx].guard)
o << *items_[idx].guard << ":";
else
o << "default:";
if (items_[idx].statement) {
o << endl;
items_[idx].statement->dump(o, ind+6);
} else {
o << " ;" << endl;
}
}
o << setw(ind) << "" << "endcase" << endl;
}
void NetCondit::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "if (";
expr_->dump(o);
o << ")" << endl;
if (if_) if_->dump(o, ind+4);
else o << setw(ind+4) << "" << "/* empty */ ;" << endl;
if (else_) {
o << setw(ind) << "" << "else" << endl;
else_->dump(o, ind+4);
}
}
void NetEvProbe::dump_node(ostream&o, unsigned ind) const
{
o << setw(ind) << "";
switch (edge_) {
case ANYEDGE:
o << "anyedge ";
break;
case POSEDGE:
o << "posedge ";
break;
case NEGEDGE:
o << "negedge ";
break;
}
o << setw(ind) << "" << "-> " << event_->full_name() << "; " << endl;
dump_node_pins(o, ind+4);
dump_obj_attr(o, ind+4);
}
void NetEvTrig::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "-> " << event_->name() << "; "
<< "// " << get_line() << endl;
}
void NetEvWait::dump(ostream&o, unsigned ind) const
{
assert(nevents() > 0);
o << setw(ind) <<"" << "@(" << event(0)->name();
for (unsigned idx = 1 ; idx < nevents() ; idx += 1)
o << " or " << event(idx)->name();
o << ") // " << get_line() << endl;
if (statement_)
statement_->dump(o, ind+2);
else
o << setw(ind+2) << "" << "/* noop */ ;" << endl;
}
void NetForever::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "forever" << endl;
statement_->dump(o, ind+2);
}
void NetFuncDef::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "function " << scope_->name() << endl;
if (statement_)
statement_->dump(o, ind+2);
else
o << setw(ind+2) << "" << "// NO STATEMENT" << endl;
}
void NetPDelay::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "#" << delay_;
if (statement_) {
o << endl;
statement_->dump(o, ind+2);
} else {
o << " /* noop */;" << endl;
}
}
void NetRepeat::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "repeat (" << *expr_ << ")" << endl;
statement_->dump(o, ind+2);
}
void NetScope::dump(ostream&o) const
{
o << name();
switch (type_) {
case BEGIN_END:
o << " sequential block";
break;
case FORK_JOIN:
o << " parallel block";
break;
case FUNC:
o << " function";
break;
case MODULE:
o << " module";
break;
case TASK:
o << " task";
break;
}
o << endl;
/* Dump the parameters for this scope. */
{
map<string,NetExpr*>::const_iterator pp;
for (pp = parameters_.begin()
; pp != parameters_.end() ; pp ++) {
o << " parameter " << (*pp).first << " = " <<
*(*pp).second << ";" << endl;
}
for (pp = localparams_.begin()
; pp != localparams_.end() ; pp ++) {
o << " localparam " << (*pp).first << " = " <<
*(*pp).second << ";" << endl;
}
}
/* Dump the saved defparam assignments here. */
{
map<string,NetExpr*>::const_iterator pp;
for (pp = defparams.begin()
; pp != defparams.end() ; pp ++ ) {
o << " defparam " << (*pp).first << " = " <<
*(*pp).second << ";" << endl;
}
}
/* Dump the events in this scope. */
for (NetEvent*cur = events_ ; cur ; cur = cur->snext_) {
o << " event " << cur->name() << "; "
<< "// " << cur->get_line() << endl;
}
/* Dump any sub-scopes. */
for (NetScope*cur = sub_ ; cur ; cur = cur->sib_)
cur->dump(o);
}
void NetSTask::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << name_;
if (parms_.count() > 0) {
o << "(";
if (parms_[0])
parms_[0]->dump(o);
for (unsigned idx = 1 ; idx < parms_.count() ; idx += 1) {
o << ", ";
if (parms_[idx])
parms_[idx]->dump(o);
}
o << ")";
}
o << ";" << endl;
}
void NetUTask::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << task_->name() << ";" << endl;
}
void NetWhile::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "while (" << *cond_ << ")" << endl;
proc_->dump(o, ind+3);
}
/* Dump a statement type that someone didn't write a dump for. */
void NetProc::dump(ostream&o, unsigned ind) const
{
o << setw(ind) << "" << "// " << typeid(*this).name() << endl;
}
/* Dump an expression that noone wrote a dump method for. */
void NetExpr::dump(ostream&o) const
{
o << "(?)";
}
void NetEBinary::dump(ostream&o) const
{
o << "(";
left_->dump(o);
o << ")";
switch (op_) {
default:
o << op_;
break;
case 'a':
o << "&&";
break;
case 'E':
o << "===";
break;
case 'e':
o << "==";
break;
case 'G':
o << ">=";
break;
case 'l':
o << "<<";
break;
case 'L':
o << "<=";
break;
case 'n':
o << "!=";
break;
case 'N':
o << "!==";
break;
case 'o':
o << "||";
break;
case 'O':
o << "~|";
break;
case 'r':
o << ">>";
break;
case 'X':
o << "~^";
break;
}
o << "(";
right_->dump(o);
o << ")";
}
void NetEConcat::dump(ostream&o) const
{
if (repeat_ != 1)
o << repeat_;
if (parms_[0])
o << "{" << *parms_[0];
else
o << "{";
for (unsigned idx = 1 ; idx < parms_.count() ; idx += 1) {
if (parms_[idx])
o << ", " << *parms_[idx];
else
o << ", ";
}
o << "}";
}
void NetEConst::dump(ostream&o) const
{
if (value_.is_string())
o << "\"" << value_.as_string() << "\"";
else
o << value_;
}
void NetEIdent::dump(ostream&o) const
{
o << name_;
}
void NetEScope::dump(ostream&o) const
{
o << "<scope=" << scope_->name() << ">";
}
void NetESignal::dump(ostream&o) const
{
o << name();
}
void NetESubSignal::dump(ostream&o) const
{
sig_->dump(o);
o << "[";
idx_->dump(o);
o << "]";
}
void NetEMemory::dump(ostream&o) const
{
o << mem_->name() << "[";
if (idx_) idx_->dump(o);
o << "]";
}
void NetEParam::dump(ostream&o) const
{
o << "<" << scope_->name() << "." << name_ << ">";
}
void NetETernary::dump(ostream&o) const
{
o << "(" << *cond_ << ") ? (" << *true_val_ << ") : (" <<
*false_val_ << ")";
}
void NetEUFunc::dump(ostream&o) const
{
o << name() << "(";
assert(parms_.count() > 0);
parms_[0]->dump(o);
for (unsigned idx = 1 ; idx < parms_.count() ; idx += 1) {
o << ", ";
parms_[idx]->dump(o);
}
o << ")";
}
void NetEUnary::dump(ostream&o) const
{
switch (op_) {
case 'N':
o << "~|";
break;
default:
o << op_;
break;
}
o << "(";
expr_->dump(o);
o << ")";
}
void Design::dump(ostream&o) const
{
o << "SCOPES:" << endl;
root_scope_->dump(o);
o << "ELABORATED SIGNALS:" << endl;
// Dump the signals,
if (signals_) {
NetNet*cur = signals_->sig_next_;
do {
cur->dump_net(o, 0);
cur = cur->sig_next_;
} while (cur != signals_->sig_next_);
}
o << "ELABORATED MEMORIES:" << endl;
{
map<string,NetMemory*>::const_iterator pp;
for (pp = memories_.begin()
; pp != memories_.end() ; pp ++) {
(*pp).second->dump(o, 0);
}
}
o << "ELABORATED FUNCTION DEFINITIONS:" << endl;
{
map<string,NetFuncDef*>::const_iterator pp;
for (pp = funcs_.begin()
; pp != funcs_.end() ; pp ++) {
(*pp).second->dump(o, 0);
}
}
o << "ELABORATED TASK DEFINITIONS:" << endl;
{
map<string,NetTaskDef*>::const_iterator pp;
for (pp = tasks_.begin()
; pp != tasks_.end() ; pp ++) {
(*pp).second->dump(o, 0);
}
}
o << "ELABORATED NODES:" << endl;
// dump the nodes,
if (nodes_) {
NetNode*cur = nodes_->node_next_;
do {
cur->dump_node(o, 0);
cur = cur->node_next_;
} while (cur != nodes_->node_next_);
}
o << "ELABORATED PROCESSES:" << endl;
// Dump the processes.
for (const NetProcTop*idx = procs_ ; idx ; idx = idx->next_)
idx->dump(o, 0);
}
/*
* $Log: design_dump.cc,v $
* Revision 1.76 2000/04/12 20:02:52 steve
* Finally remove the NetNEvent and NetPEvent classes,
* Get synthesis working with the NetEvWait class,
* and get started supporting multiple events in a
* wait in vvm.
*
* Revision 1.75 2000/04/12 04:23:57 steve
* Named events really should be expressed with PEIdent
* objects in the pform,
*
* Handle named events within the mix of net events
* and edges. As a unified lot they get caught together.
* wait statements are broken into more complex statements
* that include a conditional.
*
* Do not generate NetPEvent or NetNEvent objects in
* elaboration. NetEvent, NetEvWait and NetEvProbe
* take over those functions in the netlist.
*
* Revision 1.74 2000/04/10 05:26:05 steve
* All events now use the NetEvent class.
*
* Revision 1.73 2000/04/04 03:20:15 steve
* Simulate named event trigger and waits.
*
* Revision 1.72 2000/04/02 04:26:06 steve
* Remove the useless sref template.
*
* Revision 1.71 2000/04/01 21:40:22 steve
* Add support for integer division.
*
* Revision 1.70 2000/03/29 04:37:10 steve
* New and improved combinational primitives.
*
* Revision 1.69 2000/03/12 17:09:40 steve
* Support localparam.
*
* Revision 1.68 2000/03/08 04:36:53 steve
* Redesign the implementation of scopes and parameters.
* I now generate the scopes and notice the parameters
* in a separate pass over the pform. Once the scopes
* are generated, I can process overrides and evalutate
* paremeters before elaboration begins.
*
* Revision 1.67 2000/02/23 02:56:54 steve
* Macintosh compilers do not support ident.
*
* Revision 1.66 2000/01/13 03:35:35 steve
* Multiplication all the way to simulation.
*
* Revision 1.65 2000/01/10 01:35:23 steve
* Elaborate parameters afer binding of overrides.
*
* Revision 1.64 1999/12/17 03:38:46 steve
* NetConst can now hold wide constants.
*
* Revision 1.63 1999/12/12 06:03:14 steve
* Allow memories without indices in expressions.
*
* Revision 1.62 1999/12/05 02:24:08 steve
* Synthesize LPM_RAM_DQ for writes into memories.
*
* Revision 1.61 1999/11/28 23:42:02 steve
* NetESignal object no longer need to be NetNode
* objects. Let them keep a pointer to NetNet objects.
*
* Revision 1.60 1999/11/27 19:07:57 steve
* Support the creation of scopes.
*
* Revision 1.59 1999/11/24 04:01:58 steve
* Detect and list scope names.
*
* Revision 1.58 1999/11/21 00:13:08 steve
* Support memories in continuous assignments.
*
* Revision 1.57 1999/11/14 23:43:45 steve
* Support combinatorial comparators.
*
* Revision 1.56 1999/11/14 20:24:28 steve
* Add support for the LPM_CLSHIFT device.
*
* Revision 1.55 1999/11/04 03:53:26 steve
* Patch to synthesize unary ~ and the ternary operator.
* Thanks to Larry Doolittle <LRDoolittle@lbl.gov>.
*
* Add the LPM_MUX device, and integrate it with the
* ternary synthesis from Larry. Replace the lpm_mux
* generator in t-xnf.cc to use XNF EQU devices to
* put muxs into function units.
*
* Rewrite elaborate_net for the PETernary class to
* also use the LPM_MUX device.
*
* Revision 1.54 1999/11/04 01:12:41 steve
* Elaborate combinational UDP devices.
*
* Revision 1.53 1999/11/01 02:07:40 steve
* Add the synth functor to do generic synthesis
* and add the LPM_FF device to handle rows of
* flip-flops.
*
* Revision 1.52 1999/10/31 20:08:24 steve
* Include subtraction in LPM_ADD_SUB device.
*
* Revision 1.51 1999/10/31 04:11:27 steve
* Add to netlist links pin name and instance number,
* and arrange in vvm for pin connections by name
* and instance number.