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Support trivial SV assertions

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git-svn-id: file://localhost/svn/verilator/trunk/verilator@898 77ca24e4-aefa-0310-84f0-b9a241c72d87
This commit is contained in:
Wilson Snyder
2007-03-06 21:43:38 +00:00
parent 98282114c9
commit 79ab50d84f
19 changed files with 406 additions and 66 deletions
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src/V3LinkResolve.cpp
+16
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@@ -54,6 +54,7 @@ private:
// Below state needs to be preserved between each module call.
AstModule* m_modp; // Current module
AstNodeFTask* m_ftaskp; // Function or task we're inside
AstVAssert* m_assertp; // Current assertion
//int debug() { return 9; }
@@ -72,6 +73,13 @@ private:
nodep->iterateChildren(*this);
m_modp = NULL;
}
virtual void visit(AstVAssert* nodep, AstNUser*) {
if (m_assertp) nodep->v3error("Assert not allowed under another assert");
m_assertp = nodep;
nodep->iterateChildren(*this);
m_assertp = NULL;
}
virtual void visit(AstVar* nodep, AstNUser*) {
nodep->iterateChildren(*this);
if (nodep->arraysp() && nodep->isIO()) {
@@ -320,6 +328,13 @@ private:
virtual void visit(AstDisplay* nodep, AstNUser*) {
nodep->iterateChildren(*this);
if (nodep->filep()) expectDescriptor(nodep, nodep->filep()->castNodeVarRef());
if (!m_assertp
&& (nodep->displayType() == AstDisplayType::INFO
|| nodep->displayType() == AstDisplayType::WARNING
|| nodep->displayType() == AstDisplayType::ERROR
|| nodep->displayType() == AstDisplayType::FATAL)) {
nodep->v3error(nodep->verilogKwd()+" only allowed under a assertion.");
}
}
virtual void visit(AstScCtor* nodep, AstNUser*) {
@@ -348,6 +363,7 @@ public:
LinkResolveVisitor(AstNetlist* rootp) {
m_ftaskp = NULL;
m_modp = NULL;
m_assertp = NULL;
//
rootp->accept(*this);
}