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Support interfaces and modports, bug102.

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This commit is contained in:
Wilson Snyder
2013-05-27 21:39:19 -04:00
parent 7c834ad118
commit 23bb045a72
56 changed files with 1914 additions and 131 deletions
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src/V3LinkCells.cpp
+37
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@@ -190,6 +190,7 @@ private:
<<"' does not match "<<nodep->typeName()<<" name: "<<nodep->prettyName());
}
}
if (nodep->castIface() || nodep->castPackage()) nodep->inLibrary(true); // Interfaces can't be at top, unless asked
bool topMatch = (v3Global.opt.topModule()==nodep->prettyName());
if (topMatch) {
m_topVertexp = vertex(nodep);
@@ -210,6 +211,25 @@ private:
m_modp = NULL;
}
virtual void visit(AstIfaceRefDType* nodep, AstNUser*) {
// Cell: Resolve its filename. If necessary, parse it.
UINFO(4,"Link IfaceRef: "<<nodep<<endl);
// Use findIdUpward instead of findIdFlat; it doesn't matter for now
// but we might support modules-under-modules someday.
AstNodeModule* modp = resolveModule(nodep, nodep->ifaceName());
if (modp) {
if (modp->castIface()) {
// Track module depths, so can sort list from parent down to children
new V3GraphEdge(&m_graph, vertex(m_modp), vertex(modp), 1, false);
if (!nodep->cellp()) nodep->ifacep(modp->castIface());
} else if (modp->castNotFoundModule()) { // Will error out later
} else {
nodep->v3error("Non-interface used as an interface: "<<nodep->prettyName());
}
}
// Note cannot do modport resolution here; modports are allowed underneath generates
}
virtual void visit(AstPackageImport* nodep, AstNUser*) {
// Package Import: We need to do the package before the use of a package
nodep->iterateChildren(*this);
@@ -314,6 +334,23 @@ private:
}
}
}
if (nodep->modp()->castIface()) {
// Cell really is the parent's instantiation of an interface, not a normal module
// Make sure we have a variable to refer to this cell, so can <ifacename>.<innermember>
// in the same way that a child does. Rename though to avoid conflict with cell.
// This is quite similar to how classes work; when unpacked classes are better supported
// may remap interfaces to be more like a class.
if (!nodep->hasIfaceVar()) {
string varName = nodep->name()+"__Viftop"; // V3LinkDot looks for this naming
AstIfaceRefDType* idtypep = new AstIfaceRefDType(nodep->fileline(), nodep->name(), nodep->modp()->name());
idtypep->cellp(nodep); // Only set when real parent cell known
idtypep->ifacep(NULL); // cellp overrides
AstVar* varp = new AstVar(nodep->fileline(), AstVarType::IFACEREF, varName, VFlagChildDType(), idtypep);
varp->isIfaceParent(true);
nodep->addNextHere(varp);
nodep->hasIfaceVar(true);
}
}
if (nodep->modp()) {
nodep->iterateChildren(*this);
}