// VISITORS
virtual void visit(AstCell* nodep, AstNUser*) {
if (nodep->rangep()) {
m_cellRangep = nodep->rangep();
UINFO(4," CELL "<<nodep<<endl);
// Make all of the required clones
m_instLsb = m_cellRangep->lsbConst();
for (m_instNum = m_instLsb; m_instNum<=m_cellRangep->msbConst(); m_instNum++) {
AstCell* newp = nodep->cloneTree(false);
nodep->addNextHere(newp);
// Remove ranging and fix name
newp->rangep()->unlinkFrBack()->deleteTree();
// Somewhat illogically, we need to rename the orignal name of the cell too.
// as that is the name users expect for dotting
// The spec says we add [x], but that won't work in C...
newp->name(newp->name()+"__BRA__"+cvtToStr(m_instNum)+"__KET__");
newp->origName(newp->origName()+"__BRA__"+cvtToStr(m_instNum)+"__KET__");
// Fixup pins
newp->pinsp()->iterateAndNext(*this);
if (debug()==9) { newp->dumpTree(cout,"newcell: "); cout<<endl; }
}
// Done. Delete original
m_cellRangep=NULL;
nodep->unlinkFrBack(); pushDeletep(nodep); nodep=NULL;
}
}
virtual void visit(AstVarXRef* nodep) {
// Track what scope it was originally under so V3LinkDot can resolve it
string newname = m_cellp->name();
if (nodep->inlinedDots() != "") { newname += "." + nodep->inlinedDots(); }
nodep->inlinedDots(newname);
if (m_renamedInterfaces.count(nodep->dotted())) {
nodep->dotted(m_cellp->name() + "__DOT__" + nodep->dotted());
}
nodep->iterateChildren(*this);
}
virtual void visit(AstScopeName* nodep, AstNUser*) {
// If there's a %m in the display text, we add a special node that will contain the name()
// Similar code in V3Begin
// To keep correct visual order, must add before other Text's
AstNode* afterp = nodep->scopeAttrp();
if (afterp) afterp->unlinkFrBackWithNext();
nodep->scopeAttrp(new AstText(nodep->fileline(), (string)"__DOT__"+m_cellp->name()));
if (afterp) nodep->scopeAttrp(afterp);
afterp = nodep->scopeEntrp();
if (afterp) afterp->unlinkFrBackWithNext();
nodep->scopeEntrp(new AstText(nodep->fileline(), (string)"__DOT__"+m_cellp->name()));
if (afterp) nodep->scopeEntrp(afterp);
nodep->iterateChildren(*this);
}
virtual void visit(AstNodeFTaskRef* nodep, AstNUser*) {
// Track what scope it was originally under so V3LinkDot can resolve it
string newname = m_cellp->name();
if (nodep->inlinedDots() != "") { newname += "." + nodep->inlinedDots(); }
nodep->inlinedDots(newname);
UINFO(8," "<<nodep<<endl);
nodep->iterateChildren(*this);
}
virtual void visit(AstPin* nodep, AstNUser*) {
// PIN(p,expr) -> ASSIGNW(VARXREF(p),expr) (if sub's input)
// or ASSIGNW(expr,VARXREF(p)) (if sub's output)
UINFO(4," PIN "<<nodep<<endl);
if (!nodep->exprp()) return; // No-connect
if (debug()>=9) nodep->dumpTree(cout," Pin_oldb: ");
if (nodep->modVarp()->isOutOnly() && nodep->exprp()->castConst())
nodep->v3error("Output port is connected to a constant pin, electrical short");
// Use user1p on the PIN to indicate we created an assign for this pin
if (!nodep->user1SetOnce()) {
// Simplify it
V3Inst::pinReconnectSimple(nodep, m_cellp, m_modp, false);
// Make a ASSIGNW (expr, pin)
AstNode* exprp = nodep->exprp()->cloneTree(false);
if (exprp->width() != nodep->modVarp()->width())
nodep->v3fatalSrc("Width mismatch, should have been handled in pinReconnectSimple\n");
if (nodep->modVarp()->isInout()) {
nodep->v3fatalSrc("Unsupported: Verilator is a 2-state simulator");
} else if (nodep->modVarp()->isOutput()) {
AstNode* rhsp = new AstVarXRef (exprp->fileline(), nodep->modVarp(), m_cellp->name(), false);
AstAssignW* assp = new AstAssignW (exprp->fileline(), exprp, rhsp);
m_modp->addStmtp(assp);
} else if (nodep->modVarp()->isInput()) {
// Don't bother moving constants now,
// we'll be pushing the const down to the cell soon enough.
AstNode* assp = new AstAssignW
(exprp->fileline(),
new AstVarXRef(exprp->fileline(), nodep->modVarp(), m_cellp->name(), true),
exprp);
m_modp->addStmtp(assp);
if (debug()>=9) assp->dumpTree(cout," _new: ");
} else if (nodep->modVarp()->isIfaceRef()) {
// Create an AstAssignVarScope for Vars to Cells so we can link with their scope later
AstNode* lhsp = new AstVarXRef (exprp->fileline(), nodep->modVarp(), m_cellp->name(), false);
AstVarRef* refp = exprp->castVarRef();
if (!refp) exprp->v3fatalSrc("Interfaces: Pin is not connected to a VarRef");
AstAssignVarScope* assp = new AstAssignVarScope(exprp->fileline(), lhsp, refp);
m_modp->addStmtp(assp);
} else {
nodep->v3error("Assigned pin is neither input nor output");
}
}
// We're done with the pin
nodep->unlinkFrBack()->deleteTree(); nodep=NULL;
}
virtual void visit(AstVar* nodep, AstNUser*) {
if (nodep->user2p()) {
// Make an assignment, so we'll trace it properly
// user2p is either a const or a var.
AstConst* exprconstp = nodep->user2p()->castNode()->castConst();
AstVarRef* exprvarrefp = nodep->user2p()->castNode()->castVarRef();
UINFO(8,"connectto: "<<nodep->user2p()->castNode()<<endl);
if (!exprconstp && !exprvarrefp) {
nodep->v3fatalSrc("Unknown interconnect type; pinReconnectSimple should have cleared up\n");
}
if (exprconstp) {
m_modp->addStmtp(new AstAssignW(nodep->fileline(),
new AstVarRef(nodep->fileline(), nodep, true),
exprconstp->cloneTree(true)));
} else if (nodep->user3()) {
// Public variable at the lower module end - we need to make sure we propagate
// the logic changes up and down; if we aliased, we might remove the change detection
// on the output variable.
UINFO(9,"public pin assign: "<<exprvarrefp<<endl);
if (nodep->isInput()) nodep->v3fatalSrc("Outputs only - inputs use AssignAlias");
m_modp->addStmtp(new AstAssignW(nodep->fileline(),
new AstVarRef(nodep->fileline(), exprvarrefp->varp(), true),
new AstVarRef(nodep->fileline(), nodep, false)));
} else if (nodep->isIfaceRef()) {
m_modp->addStmtp(new AstAssignVarScope(nodep->fileline(),
new AstVarRef(nodep->fileline(), nodep, true),
new AstVarRef(nodep->fileline(), exprvarrefp->varp(), false)));
AstNode* nodebp=exprvarrefp->varp();
nodep ->fileline()->modifyStateInherit(nodebp->fileline());
nodebp->fileline()->modifyStateInherit(nodep ->fileline());
} else {
// Do to inlining child's variable now within the same module, so a AstVarRef not AstVarXRef below
m_modp->addStmtp(new AstAssignAlias(nodep->fileline(),
new AstVarRef(nodep->fileline(), nodep, true),
new AstVarRef(nodep->fileline(), exprvarrefp->varp(), false)));
AstNode* nodebp=exprvarrefp->varp();
nodep ->fileline()->modifyStateInherit(nodebp->fileline());
nodebp->fileline()->modifyStateInherit(nodep ->fileline());
}
}
// Variable under the inline cell, need to rename to avoid conflicts
// Also clear I/O bits, as it is now local.
string name = m_cellp->name() + "__DOT__" + nodep->name();
if (!nodep->isFuncLocal()) nodep->inlineAttrReset(name);
if (debug()>=9) { nodep->dumpTree(cout,"varchanged:"); }
if (debug()>=9) { nodep->valuep()->dumpTree(cout,"varchangei:"); }
// Iterate won't hit AstIfaceRefDType directly as it is no longer underneath the module
if (AstIfaceRefDType* ifacerefp = nodep->dtypep()->castIfaceRefDType()) {
// Relink to point to newly cloned cell
if (ifacerefp->cellp()) {
if (AstCell* newcellp = ifacerefp->cellp()->user4p()->castNode()->castCell()) {
ifacerefp->cellp(newcellp);
ifacerefp->cellName(newcellp->name());
}
}
}
nodep->iterateChildren(*this);
}
// VISITORS
virtual void visit(AstCellInline* nodep, AstNUser*) {
// Inlined cell under the inline cell, need to move to avoid conflicts
nodep->unlinkFrBack();
m_modp->addInlinesp(nodep);
// Rename
string name = m_cellp->name() + "__DOT__" + nodep->name();
nodep->name(name);
UINFO(6, " Inline "<<nodep<<endl);
// Do CellInlines under this, but don't move them
nodep->iterateChildren(*this);
}
virtual void visit(AstNodeModule* nodep, AstNUser*) {
// Create required blocks and add to module
string scopename;
if (!m_aboveScopep) scopename = "TOP";
else scopename = m_aboveScopep->name()+"."+m_aboveCellp->name();
UINFO(4," MOD AT "<<scopename<<" "<<nodep<<endl);
AstNode::user1ClearTree();
m_scopep = new AstScope((m_aboveCellp?(AstNode*)m_aboveCellp:(AstNode*)nodep)->fileline(),
nodep, scopename, m_aboveScopep, m_aboveCellp);
// Now for each child cell, iterate the module this cell points to
for (AstNode* cellnextp = nodep->stmtsp(); cellnextp; cellnextp=cellnextp->nextp()) {
if (AstCell* cellp = cellnextp->castCell()) {
AstScope* oldScopep = m_scopep;
AstCell* oldAbCellp = m_aboveCellp;
AstScope* oldAbScopep = m_aboveScopep;
{
m_aboveCellp = cellp;
m_aboveScopep = m_scopep;
AstNodeModule* modp = cellp->modp();
if (!modp) cellp->v3fatalSrc("Unlinked mod");
modp->accept(*this); // Recursive call to visit(AstNodeModule)
}
// Done, restore vars
m_scopep = oldScopep;
m_aboveCellp = oldAbCellp;
m_aboveScopep = oldAbScopep;
}
}
// Create scope for the current usage of this module
UINFO(4," back AT "<<scopename<<" "<<nodep<<endl);
AstNode::user1ClearTree();
m_modp = nodep;
if (m_modp->isTop()) {
AstTopScope* topscp = new AstTopScope(nodep->fileline(), m_scopep);
m_modp->addStmtp(topscp);
} else {
m_modp->addStmtp(m_scopep);
}
// Copy blocks into this scope
// If this is the first usage of the block ever, we can simply move the reference
nodep->iterateChildren(*this);
// ***Note m_scopep is passed back to the caller of the routine (above)
}
virtual void visit(AstTypedef* nodep, AstNUser*) {
// Typedef under the inline cell, need to rename to avoid conflicts
nodep->name(m_cellp->name() + "__DOT__" + nodep->name());
nodep->iterateChildren(*this);
}
virtual void visit(AstCell* nodep, AstNUser*) {
// Cell under the inline cell, need to rename to avoid conflicts
string name = m_cellp->name() + "__DOT__" + nodep->name();
nodep->name(name);
nodep->iterateChildren(*this);
}
virtual void visit(AstNodeFTask* nodep) {
// Function under the inline cell, need to rename to avoid conflicts
nodep->name(m_cellp->name() + "__DOT__" + nodep->name());
nodep->iterateChildren(*this);
}