PUdp.h

   1 #ifndef __PUdp_H
   2 #define __PUdp_H
   3 /*
   4  * Copyright (c) 1998-2004 Stephen Williams (steve@picturel.com)
   5  *
   6  *    This source code is free software; you can redistribute it
   7  *    and/or modify it in source code form under the terms of the GNU
   8  *    General Public License as published by the Free Software
   9  *    Foundation; either version 2 of the License, or (at your option)
  10  *    any later version.
  11  *
  12  *    This program is distributed in the hope that it will be useful,
  13  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *    GNU General Public License for more details.
  16  *
  17  *    You should have received a copy of the GNU General Public License
  18  *    along with this program; if not, write to the Free Software
  19  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  20  */
  21 #ifdef HAVE_CVS_IDENT
  22 #ident "$Id: PUdp.h,v 1.12 2004/03/08 00:47:44 steve Exp $"
  23 #endif
  24
  25 # include  <map>
  26 # include  "StringHeap.h"
  27 # include  "svector.h"
  28 # include  "verinum.h"
  29
  30 class PExpr;
  31
  32 /*
  33  * This class represents a parsed UDP. This is a much simpler object
  34  * then a module or macromodule.
  35  *
  36  *   - all ports are scalar,
  37  *   - pin 0 (the first port) is always output,
  38  *     and the remaining pins are input.
  39  *
  40  * Thus, the ports can be represented as an ordered list of pin names.
  41  * If the output port is declared as a register in the Verilog source,
  42  * then this is a sequential UDP and the sequential flag is set to true.
  43  *
  44  * STATE TABLE
  45  * Each entry in the state table is given as a string with the same
  46  * number of characters as inputs. If the UDP is sequential, a
  47  * character is also included at the end of the string to represent
  48  * the current output.
  49  *
  50  * If the UDP is sequential, the "initial" member is taken to be the
  51  * initial value assigned in the source, or 'x' if none is given.
  52  */
  53 class PUdp {
  54
  55     public:
  56       explicit PUdp(perm_string n, unsigned nports);
  57
  58       svector<string>ports;
  59       unsigned find_port(const char*name);
  60
  61       bool sequential;
  62
  63       svector<string>tinput;
  64       svector<char>  tcurrent;
  65       svector<char>  toutput;
  66
  67       verinum::V initial;
  68
  69       map<string,PExpr*> attributes;
  70
  71       void dump(ostream&out) const;
  72
  73       perm_string name_;
  74     private:
  75
  76     private: // Not implemented
  77       PUdp(const PUdp&);
  78       PUdp& operator= (const PUdp&);
  79 };
  80
  81 /*
  82  * $Log: PUdp.h,v $
  83  * Revision 1.12  2004/03/08 00:47:44  steve
  84  *  primitive ports can bind bi name.
  85  *
  86  * Revision 1.11  2004/02/18 17:11:54  steve
  87  *  Use perm_strings for named langiage items.
  88  *
  89  * Revision 1.10  2003/07/15 05:07:13  steve
  90  *  Move PUdp constructor into compiled file.
  91  *
  92  * Revision 1.9  2003/07/15 03:49:22  steve
  93  *  Spelling fixes.
  94  *
  95  * Revision 1.8  2003/01/30 16:23:07  steve
  96  *  Spelling fixes.
  97  *
  98  * Revision 1.7  2002/08/12 01:34:58  steve
  99  *  conditional ident string using autoconfig.
 100  *
 101  * Revision 1.6  2002/05/23 03:08:51  steve
 102  *  Add language support for Verilog-2001 attribute
 103  *  syntax. Hook this support into existing $attribute
 104  *  handling, and add number and void value types.
 105  *
 106  *  Add to the ivl_target API new functions for access
 107  *  of complex attributes attached to gates.
 108  *
 109  * Revision 1.5  2001/04/22 23:09:45  steve
 110  *  More UDP consolidation from Stephan Boettcher.
 111  *
 112  * Revision 1.4  2000/02/23 02:56:53  steve
 113  *  Macintosh compilers do not support ident.
 114  *
 115  * Revision 1.3  1999/06/15 03:44:53  steve
 116  *  Get rid of the STL vector template.
 117  *
 118  * Revision 1.2  1998/12/01 00:42:13  steve
 119  *  Elaborate UDP devices,
 120  *  Support UDP type attributes, and
 121  *  pass those attributes to nodes that
 122  *  are instantiated by elaboration,
 123  *  Put modules into a map instead of
 124  *  a simple list.
 125  *
 126  * Revision 1.1  1998/11/25 02:35:53  steve
 127  *  Parse UDP primitives all the way to pform.
 128  *
 129  */
 130 #endif