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#ifndef __netmisc_H
#define __netmisc_H
* Copyright (c) 1999-2010 Stephen Williams (
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
# include "netlist.h"
* Search for a symbol using the "start" scope as the starting
* point. If the path includes a scope part, then locate the
* scope first.
* The return value is the scope where the symbol was found.
* If the symbol was not found, return 0. The output arguments
* get 0 except for the pointer to the object that represents
* the located symbol.
extern NetScope* symbol_search(Design*des, NetScope*start, hname_t path,
NetNet*&net, /* net/reg */
NetMemory*&mem, /* memory */
NetVariable*&var, /* real/realtime */
const NetExpr*&par,/* parameter */
NetEvent*&eve /* named event */);
* This function transforms an expression by padding the high bits
* with V0 until the expression has the desired width. This may mean
* not transforming the expression at all, if it is already wide
* enough.
extern NetExpr*pad_to_width(NetExpr*expr, unsigned wid);
extern NetNet*pad_to_width(Design*des, NetNet*n, unsigned w);
* This function takes as input a NetNet signal and adds a constant
* value to it. If the val is 0, then simply return sig. Otherwise,
* return a new NetNet value that is the output of an addition.
extern NetNet*add_to_net(Design*des, NetNet*sig, long val);
* Calculate the reduction OR from the input signal.
extern NetNet*reduction_or(Design*des, NetNet*sig);
* In some cases the lval is accessible as a pointer to the head of
* a list of NetAssign_ objects. This function returns the width of
* the l-value represented by this list.
extern unsigned count_lval_width(const class NetAssign_*first);
* This function elaborates an expression, and tries to evaluate it
* right away. If the expression can be evaluated, this returns a
* constant expression. If it cannot be evaluated, it returns whatever
* it can. If the expression cannot be elaborated, return 0.
class PExpr;
extern NetExpr* elab_and_eval(Design*des, NetScope*scope, const PExpr*pe);
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