94 lines
3.2 KiB
C++
94 lines
3.2 KiB
C++
#ifndef __netmisc_H
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#define __netmisc_H
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/*
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* Copyright (c) 1999-2000 Stephen Williams (steve@icarus.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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#ifdef HAVE_CVS_IDENT
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#ident "$Id: netmisc.h,v 1.16 2002/08/31 03:48:50 steve Exp $"
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#endif
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# include "netlist.h"
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/*
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* This funciton transforms an expression by padding the high bits
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* with V0 until the expression has the desired width. This may mean
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* not transforming the expression at all, if it is already wide
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* enough.
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*/
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extern NetExpr*pad_to_width(NetExpr*expr, unsigned wid);
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extern NetNet*pad_to_width(Design*des, NetNet*n, unsigned w);
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/*
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* This function takes as input a NetNet signal and adds a constant
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* value to it. If the val is 0, then simply return sig. Otherwise,
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* return a new NetNet value that is the output of an addition.
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*/
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extern NetNet*add_to_net(Design*des, NetNet*sig, long val);
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/*
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* In some cases the lval is accessible as a pointer to the head of
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* a list of NetAssign_ objects. This function returns the width of
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* the l-value represented by this list.
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*/
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extern unsigned count_lval_width(const class NetAssign_*first);
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/*
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* This function elaborates an expression, and tries to evaluate it
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* right away. It is useful for those places where the user is
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* supposed to supply a constant expression.
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*/
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class PExpr;
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extern NetExpr* elab_and_eval(Design*des, NetScope*scope, const PExpr*pe);
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/*
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* $Log: netmisc.h,v $
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* Revision 1.16 2002/08/31 03:48:50 steve
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* Fix reverse bit ordered bit select in continuous assignment.
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*
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* Revision 1.15 2002/08/12 01:35:00 steve
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* conditional ident string using autoconfig.
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*
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* Revision 1.14 2002/06/25 01:33:22 steve
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* Cache calculated driven value.
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*
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* Revision 1.13 2002/06/24 01:49:39 steve
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* Make link_drive_constant cache its results in
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* the Nexus, to improve cprop performance.
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*
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* Revision 1.12 2001/02/15 06:59:36 steve
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* FreeBSD port has a maintainer now.
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*
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* Revision 1.11 2001/02/10 20:29:39 steve
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* In the context of range declarations, use elab_and_eval instead
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* of the less robust eval_const methods.
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*
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* Revision 1.10 2000/11/20 00:58:40 steve
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* Add support for supply nets (PR#17)
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*
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* Revision 1.9 2000/09/20 02:53:15 steve
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* Correctly measure comples l-values of assignments.
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*
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* Revision 1.8 2000/06/25 19:59:42 steve
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* Redesign Links to include the Nexus class that
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* carries properties of the connected set of links.
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*
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* Revision 1.7 2000/05/14 17:55:04 steve
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* Support initialization of FF Q value.
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*/
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#endif
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