mirror of
https://github.com/verilator/verilator.git
synced 2025-01-12 01:27:36 +00:00
73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
|
// -*- C++ -*-
|
|||
|
|
//*************************************************************************
|
|||
|
|
// DESCRIPTION: Verilator: Cleanup stage in V3Width
|
|||
|
|
//
|
|||
|
|
// Code available from: http://www.veripool.org/verilator
|
|||
|
|
//
|
|||
|
|
// AUTHORS: Wilson Snyder with Paul Wasson, Duane Gabli
|
|||
|
|
//
|
|||
|
|
//*************************************************************************
|
|||
|
|
//
|
|||
|
|
// Copyright 2003-2011 by Wilson Snyder. This program is free software; you can
|
|||
|
|
// redistribute it and/or modify it under the terms of either the GNU
|
|||
|
|
// Lesser General Public License Version 3 or the Perl Artistic License
|
|||
|
|
// Version 2.0.
|
|||
|
|
//
|
|||
|
|
// Verilator is distributed in the hope that it will be useful,
|
|||
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|||
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|||
|
|
// GNU General Public License for more details.
|
|||
|
|
//
|
|||
|
|
//*************************************************************************
|
|||
|
|
|
|||
|
|
#ifndef _V3WIDTHCOMMIT_H_
|
|||
|
|
#define _V3WIDTHCOMMIT_H_ 1
|
|||
|
|
#include "config_build.h"
|
|||
|
|
#include "verilatedos.h"
|
|||
|
|
#include "V3Error.h"
|
|||
|
|
#include "V3Ast.h"
|
|||
|
|
|
|||
|
|
#ifndef _V3WIDTH_CPP_
|
|||
|
|
# error "V3WidthCommit for V3Width internal use only"
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
//######################################################################
|
|||
|
|
|
|||
|
|
class WidthCommitVisitor : public AstNVisitor {
|
|||
|
|
// Now that all widthing is complete,
|
|||
|
|
// Copy all width() to widthMin(). V3Const expects this
|
|||
|
|
private:
|
|||
|
|
// VISITORS
|
|||
|
|
virtual void visit(AstConst* nodep, AstNUser*) {
|
|||
|
|
nodep->width(nodep->width(),nodep->width());
|
|||
|
|
if ((nodep->width() != nodep->num().width()) || !nodep->num().sized()) {
|
|||
|
|
V3Number num (nodep->fileline(), nodep->width());
|
|||
|
|
num.opAssign(nodep->num());
|
|||
|
|
num.isSigned(nodep->isSigned());
|
|||
|
|
AstNode* newp = new AstConst(nodep->fileline(), num);
|
|||
|
|
nodep->replaceWith(newp);
|
|||
|
|
//if (debug()>4) nodep->dumpTree(cout," fixConstSize_old: ");
|
|||
|
|
//if (debug()>4) newp->dumpTree(cout," _new: ");
|
|||
|
|
pushDeletep(nodep); nodep=NULL;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
virtual void visit(AstNode* nodep, AstNUser*) {
|
|||
|
|
nodep->width(nodep->width(),nodep->width());
|
|||
|
|
nodep->iterateChildren(*this);
|
|||
|
|
}
|
|||
|
|
virtual void visit(AstNodePreSel* nodep, AstNUser*) {
|
|||
|
|
// This check could go anywhere after V3Param
|
|||
|
|
nodep->v3fatalSrc("Presels should have been removed before this point");
|
|||
|
|
}
|
|||
|
|
public:
|
|||
|
|
// CONSTUCTORS
|
|||
|
|
WidthCommitVisitor(AstNetlist* nodep) {
|
|||
|
|
nodep->accept(*this);
|
|||
|
|
}
|
|||
|
|
virtual ~WidthCommitVisitor() {}
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
//######################################################################
|
|||
|
|
|
|||
|
|
#endif // Guard
|