110 lines
3.1 KiB
C++
110 lines
3.1 KiB
C++
/*
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* Copyright (c) 2000 Stephen Williams (steve@.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#if !defined(WINNT) && !defined(macintosh)
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#ident "$Id: nexus_from_link.cc,v 1.4 2000/05/07 19:40:26 steve Exp $"
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#endif
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# include "netmisc.h"
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# include <strstream>
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# include <string>
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# include <typeinfo>
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string nexus_from_link(const Link*lnk)
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{
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const NetNet*sig = dynamic_cast<const NetNet*>(lnk->get_obj());
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unsigned pin = lnk->get_pin();
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for (const Link*cur = lnk->next_link()
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; cur != lnk ; cur = cur->next_link()) {
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const NetNet*cursig = dynamic_cast<const NetNet*>(cur->get_obj());
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if (cursig == 0)
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continue;
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if (sig == 0) {
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sig = cursig;
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pin = cur->get_pin();
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continue;
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}
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if ((cursig->pin_count() == 1) && (sig->pin_count() > 1))
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continue;
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if ((cursig->pin_count() > 1) && (sig->pin_count() == 1)) {
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sig = cursig;
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pin = cur->get_pin();
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continue;
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}
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if (cursig->local_flag() && !sig->local_flag())
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continue;
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if (cursig->name() < sig->name())
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continue;
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sig = cursig;
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pin = cur->get_pin();
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}
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if (sig == 0) {
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const NetObj*obj = lnk->get_obj();
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pin = lnk->get_pin();
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cerr << "internal error: No signal for nexus of " <<
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obj->name() << " pin " << pin << "(" <<
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lnk->get_name() << "<" << lnk->get_inst() << ">)"
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" type=" << typeid(*obj).name() << "?" << endl;
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}
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assert(sig);
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ostrstream tmp;
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tmp << sig->name();
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if (sig->pin_count() > 1)
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tmp << "<" << pin << ">";
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tmp << ends;
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return tmp.str();
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}
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/*
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* $Log: nexus_from_link.cc,v $
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* Revision 1.4 2000/05/07 19:40:26 steve
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* Fix connection of Direction of LMP_CLSHIFT
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* to constant values. Remember to add a signal
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* to the nexus and connect the receiver in vvm.
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*
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* Revision 1.3 2000/05/07 04:37:56 steve
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* Carry strength values from Verilog source to the
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* pform and netlist for gates.
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*
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* Change vvm constants to use the driver_t to drive
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* a constant value. This works better if there are
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* multiple drivers on a signal.
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*
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* Revision 1.2 2000/03/20 17:40:54 steve
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* More complete error message about no signal.
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*
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* Revision 1.1 2000/03/16 19:03:03 steve
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* Revise the VVM backend to use nexus objects so that
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* drivers and resolution functions can be used, and
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* the t-vvm module doesn't need to write a zillion
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* output functions.
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*
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*/
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