mirror of
https://github.com/verilator/verilator.git
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142 lines
4.3 KiB
C++
142 lines
4.3 KiB
C++
//*************************************************************************
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// DESCRIPTION: Verilator: Change names for __PVT__'s
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//
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// Code available from: http://www.veripool.org/verilator
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//
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// AUTHORS: Wilson Snyder with Paul Wasson, Duane Gabli
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//
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//*************************************************************************
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//
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// Copyright 2003-2011 by Wilson Snyder. This program is free software; you can
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// redistribute it and/or modify it under the terms of either the GNU
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// Lesser General Public License Version 3 or the Perl Artistic License
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// Version 2.0.
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//
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// Verilator 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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//*************************************************************************
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// V3Name's Transformations:
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//
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// Cell/Var's
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// Prepend __PVT__ to variable names
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//*************************************************************************
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#include "config_build.h"
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#include "verilatedos.h"
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#include <cstdio>
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#include <cstdarg>
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#include <unistd.h>
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#include <algorithm>
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#include "V3Global.h"
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#include "V3Name.h"
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#include "V3Ast.h"
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#include "V3LanguageWords.h"
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//######################################################################
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// Name state, as a visitor of each AstNode
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class NameVisitor : public AstNVisitor {
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private:
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// NODE STATE
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// Cleared on Netlist
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// AstCell::user1() -> bool. Set true if already processed
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// AstScope::user1() -> bool. Set true if already processed
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// AstVar::user1() -> bool. Set true if already processed
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AstUser1InUse m_inuser1;
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// STATE
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AstNodeModule* m_modp;
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V3LanguageWords m_words; // Reserved word detector
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// METHODS
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static int debug() {
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static int level = -1;
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if (VL_UNLIKELY(level < 0)) level = v3Global.opt.debugSrcLevel(__FILE__);
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return level;
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}
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void rename(AstNode* nodep, bool addPvt) {
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if (!nodep->user1()) { // Not already done
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if (addPvt) {
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string newname = (string)"__PVT__"+nodep->name();
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nodep->name(newname);
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} else {
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string rsvd = m_words.isKeyword(nodep->name());
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if (rsvd != "") {
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nodep->v3warn(SYMRSVDWORD,"Symbol matches "+rsvd+": '"<<nodep->name()<<"'");
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string newname = (string)"__SYM__"+nodep->name();
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nodep->name(newname);
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}
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}
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nodep->user1(1);
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}
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}
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// VISITORS
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virtual void visit(AstNodeModule* nodep, AstNUser*) {
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m_modp = nodep;
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nodep->iterateChildren(*this);
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m_modp = NULL;
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}
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// Add __PVT__ to names of local signals
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virtual void visit(AstVar* nodep, AstNUser*) {
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// Don't iterate... Don't need temps for RANGES under the Var.
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rename(nodep, (!m_modp->isTop()
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&& !nodep->isSigPublic()
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&& !nodep->isFuncLocal() // Isn't exposed, and would mess up dpi import wrappers
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&& !nodep->isTemp())); // Don't bother to rename internal signals
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}
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virtual void visit(AstCFunc* nodep, AstNUser*) {
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if (!nodep->user1()) {
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nodep->iterateChildren(*this);
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rename(nodep, false);
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}
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}
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virtual void visit(AstVarRef* nodep, AstNUser*) {
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if (nodep->varp()) {
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nodep->varp()->iterate(*this);
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nodep->name(nodep->varp()->name());
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}
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}
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virtual void visit(AstCell* nodep, AstNUser*) {
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if (!nodep->user1()) {
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rename(nodep, !nodep->modp()->modPublic());
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nodep->iterateChildren(*this);
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}
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}
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virtual void visit(AstScope* nodep, AstNUser*) {
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if (!nodep->user1Inc()) {
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if (nodep->aboveScopep()) nodep->aboveScopep()->iterate(*this);
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if (nodep->aboveCellp()) nodep->aboveCellp()->iterate(*this);
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// Always recompute name (as many level above scope may have changed)
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// Same formula as V3Scope
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nodep->name(nodep->isTop() ? "TOP"
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: (nodep->aboveScopep()->name()+"."+nodep->aboveCellp()->name()));
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nodep->iterateChildren(*this);
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}
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}
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//--------------------
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virtual void visit(AstNode* nodep, AstNUser*) {
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nodep->iterateChildren(*this);
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}
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public:
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// CONSTUCTORS
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NameVisitor(AstNetlist* nodep) {
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nodep->accept(*this);
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}
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virtual ~NameVisitor() {}
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};
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//######################################################################
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// Name class functions
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void V3Name::nameAll(AstNetlist* nodep) {
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UINFO(2,__FUNCTION__<<": "<<endl);
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NameVisitor visitor (nodep);
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}
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