示例#1
0
    virtual void visit(AstNodeModule* nodep, AstNUser*) {
	if (nodep->dead()) {
	    UINFO(4," MOD-dead.  "<<nodep<<endl);  // Marked by LinkDot
	} else if (nodep->level() <= 2) {  // Haven't added top yet, so level 2 is the top
	    // Add request to END of modules left to process
	    m_todoModps.insert(make_pair(nodep->level(),nodep));
	    visitModules();
	} else if (nodep->user5()) {
	    UINFO(4," MOD-done   "<<nodep<<endl);  // Already did it
	} else {
	    UINFO(4," MOD-dead?  "<<nodep<<endl);  // Should have been done by now, if not dead
	}
    }
void ParamVisitor::visitCell(AstCell* nodep) {
    // Cell: Check for parameters in the instantiation.
    nodep->iterateChildren(*this);
    if (!nodep->modp()) nodep->v3fatalSrc("Not linked?");
    if (nodep->paramsp()
	|| 1  // Need to look for interfaces; could track when one exists, but should be harmless to always do this
	) {
	UINFO(4,"De-parameterize: "<<nodep<<endl);
	// Create new module name with _'s between the constants
	if (debug()>=10) nodep->dumpTree(cout,"-cell:\t");
	// Evaluate all module constants
	V3Const::constifyParamsEdit(nodep);

	// Make sure constification worked
	// Must be a separate loop, as constant conversion may have changed some pointers.
	//if (debug()) nodep->dumpTree(cout,"-cel2:\t");
	string longname = nodep->modp()->name();
	bool any_overrides = false;
	longname += "_";
	if (debug()>8) nodep->paramsp()->dumpTreeAndNext(cout,"-cellparams:\t");
	for (AstPin* pinp = nodep->paramsp(); pinp; pinp=pinp->nextp()->castPin()) {
	    if (!pinp->exprp()) continue; // No-connect
	    AstVar* modvarp = pinp->modVarp();
	    if (!modvarp) {
		pinp->v3error("Parameter not found in sub-module: Param "<<pinp->name()<<" of "<<nodep->prettyName());
	    } else if (!modvarp->isGParam()) {
		pinp->v3error("Attempted parameter setting of non-parameter: Param "<<pinp->name()<<" of "<<nodep->prettyName());
	    } else {
		AstConst* constp = pinp->exprp()->castConst();
		AstConst* origconstp = modvarp->valuep()->castConst();
		if (!constp) {
		    //if (debug()) pinp->dumpTree(cout,"error:");
		    pinp->v3error("Can't convert defparam value to constant: Param "<<pinp->name()<<" of "<<nodep->prettyName());
		    pinp->exprp()->replaceWith(new AstConst(pinp->fileline(), V3Number(pinp->fileline(), modvarp->width(), 0)));
		} else if (origconstp && constp->sameTree(origconstp)) {
		    // Setting parameter to its default value.  Just ignore it.
		    // This prevents making additional modules, and makes coverage more
		    // obvious as it won't show up under a unique module page name.
		} else {
		    longname += "_" + paramSmallName(nodep->modp(),pinp->modVarp())+constp->num().ascii(false);
		    any_overrides = true;
		}
	    }
	}
	IfaceRefRefs ifaceRefRefs;
	for (AstPin* pinp = nodep->pinsp(); pinp; pinp=pinp->nextp()->castPin()) {
	    AstVar* modvarp = pinp->modVarp();
	    if (modvarp->isIfaceRef()) {
		AstIfaceRefDType* portIrefp = modvarp->subDTypep()->castIfaceRefDType();
		//UINFO(9,"     portIfaceRef "<<portIrefp<<endl);
		if (!pinp->exprp()
		    || !pinp->exprp()->castVarRef()
		    || !pinp->exprp()->castVarRef()->varp()
		    || !pinp->exprp()->castVarRef()->varp()->subDTypep()
		    || !pinp->exprp()->castVarRef()->varp()->subDTypep()->castIfaceRefDType()) {
		    pinp->v3error("Interface port '"<<modvarp->prettyName()<<"' is not connected to interface/modport pin expression");
		} else {
		    AstIfaceRefDType* pinIrefp = pinp->exprp()->castVarRef()->varp()->subDTypep()->castIfaceRefDType();
		    //UINFO(9,"     pinIfaceRef "<<pinIrefp<<endl);
		    if (portIrefp->ifaceViaCellp() != pinIrefp->ifaceViaCellp()) {
			UINFO(9,"     IfaceRefDType needs reconnect  "<<pinIrefp<<endl);
			longname += "_" + paramSmallName(nodep->modp(),pinp->modVarp())+paramValueNumber(pinIrefp);
			any_overrides = true;
			ifaceRefRefs.push_back(make_pair(portIrefp,pinIrefp));
		    }
		}
	    }
	}

	if (!any_overrides) {
	    UINFO(8,"Cell parameters all match original values, skipping expansion.\n");
	} else {
	    // If the name is very long, we don't want to overwhelm the filename limit
	    // We don't do this always, as it aids debugability to have intuitive naming.
	    // TODO can use new V3Name hash replacement instead of this
	    string newname = longname;
	    if (longname.length()>30) {
		LongMap::iterator iter = m_longMap.find(longname);
		if (iter != m_longMap.end()) {
		    newname = iter->second;
		} else {
		    newname = nodep->modp()->name();
		    newname += "__pi"+cvtToStr(++m_longId);  // We use all upper case above, so lower here can't conflict
		    m_longMap.insert(make_pair(longname, newname));
		}
	    }
	    UINFO(4,"Name: "<<nodep->modp()->name()<<"->"<<longname<<"->"<<newname<<endl);

	    //
	    // Already made this flavor?
	    AstNodeModule* modp = NULL;
	    ModNameMap::iterator iter = m_modNameMap.find(newname);
	    if (iter != m_modNameMap.end()) modp = iter->second.m_modp;
	    if (!modp) {
		// Deep clone of new module
		// Note all module internal variables will be re-linked to the new modules by clone
		// However links outside the module (like on the upper cells) will not.
		modp = nodep->modp()->cloneTree(false);
		modp->name(newname);
		modp->user5(false); // We need to re-recurse this module once changed
		nodep->modp()->addNextHere(modp);  // Keep tree sorted by cell occurrences

		m_modNameMap.insert(make_pair(modp->name(), ModInfo(modp)));
		iter = m_modNameMap.find(newname);
		VarCloneMap* clonemapp = &(iter->second.m_cloneMap);
		UINFO(4,"     De-parameterize to new: "<<modp<<endl);

		// Grab all I/O so we can remap our pins later
		// Note we allow multiple users of a parameterized model, thus we need to stash this info.
		for (AstNode* stmtp=modp->stmtsp(); stmtp; stmtp = stmtp->nextp()) {
		    if (AstVar* varp = stmtp->castVar()) {
			if (varp->isIO() || varp->isGParam() || varp->isIfaceRef()) {
			    // Cloning saved a pointer to the new node for us, so just follow that link.
			    AstVar* oldvarp = varp->clonep()->castVar();
			    //UINFO(8,"Clone list 0x"<<hex<<(uint32_t)oldvarp<<" -> 0x"<<(uint32_t)varp<<endl);
			    clonemapp->insert(make_pair(oldvarp, varp));
			}
		    }
		}

		// Relink parameter vars to the new module
		relinkPins(clonemapp, nodep->paramsp());

		// Fix any interface references
		for (IfaceRefRefs::iterator it=ifaceRefRefs.begin(); it!=ifaceRefRefs.end(); ++it) {
		    AstIfaceRefDType* portIrefp = it->first;
		    AstIfaceRefDType* pinIrefp = it->second;
		    AstIfaceRefDType* cloneIrefp = portIrefp->clonep()->castIfaceRefDType();
		    UINFO(8,"     IfaceOld "<<portIrefp<<endl);
		    UINFO(8,"     IfaceTo  "<<pinIrefp<<endl);
		    if (!cloneIrefp) portIrefp->v3fatalSrc("parameter clone didn't hit AstIfaceRefDType");
		    UINFO(8,"     IfaceClo "<<cloneIrefp<<endl);
		    cloneIrefp->ifacep(pinIrefp->ifaceViaCellp());
		    UINFO(8,"     IfaceNew "<<cloneIrefp<<endl);
		}

		// Assign parameters to the constants specified
		// DOES clone() so must be finished with module clonep() before here
		for (AstPin* pinp = nodep->paramsp(); pinp; pinp=pinp->nextp()->castPin()) {
		    AstVar* modvarp = pinp->modVarp();
		    if (modvarp && pinp->exprp()) {
			AstConst* constp = pinp->exprp()->castConst();
			// Remove any existing parameter
			if (modvarp->valuep()) modvarp->valuep()->unlinkFrBack()->deleteTree();
			// Set this parameter to value requested by cell
			modvarp->valuep(constp->cloneTree(false));
		    }
		}
	    } else {
		UINFO(4,"     De-parameterize to old: "<<modp<<endl);
	    }

	    // Have child use this module instead.
	    nodep->modp(modp);
	    nodep->modName(newname);

	    // We need to relink the pins to the new module
	    VarCloneMap* clonemapp = &(iter->second.m_cloneMap);
	    relinkPins(clonemapp, nodep->pinsp());
	    UINFO(8,"     Done with "<<modp<<endl);
	} // if any_overrides

	// Delete the parameters from the cell; they're not relevant any longer.
	if (nodep->paramsp()) nodep->paramsp()->unlinkFrBackWithNext()->deleteTree();
	UINFO(8,"     Done with "<<nodep<<endl);
	//if (debug()>=10) v3Global.rootp()->dumpTreeFile(v3Global.debugFilename("param-out.tree"));
    }

    // Now remember to process the child module at the end of the module
    m_todoModps.insert(make_pair(nodep->modp()->level(),nodep->modp()));
}