net_force.cc

   1 /*
   2  * Copyright (c) 2000-2004 Stephen Williams (steve@picturel.com)
   3  *
   4  *    This source code is free software; you can redistribute it
   5  *    and/or modify it in source code form under the terms of the GNU
   6  *    General Public License as published by the Free Software
   7  *    Foundation; either version 2 of the License, or (at your option)
   8  *    any later version.
   9  *
  10  *    This program is distributed in the hope that it will be useful,
  11  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *    GNU General Public License for more details.
  14  *
  15  *    You should have received a copy of the GNU General Public License
  16  *    along with this program; if not, write to the Free Software
  17  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  18  */
  19 #ifdef HAVE_CVS_IDENT
  20 #ident "$Id: net_force.cc,v 1.13 2004/12/11 02:31:26 steve Exp $"
  21 #endif
  22
  23 # include  "config.h"
  24 # include  "compiler.h"
  25
  26 /*
  27  * This file contains implementation of the NetForce, NetRelease,
  28  * NetCAssign and NetDeassign classes. These are similar or related in
  29  * that they handle the procedural continuous assign and force
  30  * statements.
  31  */
  32
  33 # include  "netlist.h"
  34 # include  <assert.h>
  35
  36
  37 /*
  38  * $Log: net_force.cc,v $
  39  * Revision 1.13  2004/12/11 02:31:26  steve
  40  *  Rework of internals to carry vectors through nexus instead
  41  *  of single bits. Make the ivl, tgt-vvp and vvp initial changes
  42  *  down this path.
  43  *
  44  * Revision 1.12  2004/02/18 17:11:56  steve
  45  *  Use perm_strings for named langiage items.
  46  *
  47  * Revision 1.11  2003/03/06 00:28:41  steve
  48  *  All NetObj objects have lex_string base names.
  49  *
  50  * Revision 1.10  2003/01/27 05:09:17  steve
  51  *  Spelling fixes.
  52  *
  53  * Revision 1.9  2002/08/19 00:06:12  steve
  54  *  Allow release to handle removal of target net.
  55  *
  56  * Revision 1.8  2002/08/12 01:34:59  steve
  57  *  conditional ident string using autoconfig.
  58  *
  59  * Revision 1.7  2002/01/19 19:02:08  steve
  60  *  Pass back target errors processing conditionals.
  61  *
  62  * Revision 1.6  2001/11/14 03:28:49  steve
  63  *  DLL target support for force and release.
  64  *
  65  * Revision 1.5  2001/10/31 05:24:52  steve
  66  *  ivl_target support for assign/deassign.
  67  *
  68  * Revision 1.4  2001/10/28 01:14:53  steve
  69  *  NetObj constructor finally requires a scope.
  70  *
  71  * Revision 1.3  2001/07/25 03:10:49  steve
  72  *  Create a config.h.in file to hold all the config
  73  *  junk, and support gcc 3.0. (Stephan Boettcher)
  74  *
  75  * Revision 1.2  2000/05/12 01:22:41  steve
  76  *  NetCAssign needs to incr_eref its lval to lock it down.
  77  *
  78  * Revision 1.1  2000/05/11 23:37:27  steve
  79  *  Add support for procedural continuous assignment.
  80  *
  81  */
  82