59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
/*
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* Copyright (c) 1999 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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#if !defined(WINNT)
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#ident "$Id: pad_to_width.cc,v 1.2 2000/01/01 06:17:25 steve Exp $"
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#endif
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# include "netlist.h"
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# include "netmisc.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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NetExpr*pad_to_width(NetExpr*expr, unsigned wid)
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{
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if (wid > expr->expr_width()) {
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verinum pad(verinum::V0, wid - expr->expr_width());
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NetEConst*co = new NetEConst(pad);
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co->set_line(*expr);
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NetEConcat*cc = new NetEConcat(2);
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cc->set_line(*expr);
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cc->set(0, co);
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cc->set(1, expr);
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cc->set_width(wid);
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expr = cc;
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}
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return expr;
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}
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/*
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* $Log: pad_to_width.cc,v $
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* Revision 1.2 2000/01/01 06:17:25 steve
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* Propogate line number information when expanding expressions.
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*
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* Revision 1.1 1999/09/29 00:42:51 steve
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* Allow expanding of additive operators.
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*
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*/
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