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Support SystemVerilog "cover property" statements.

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This commit is contained in:
Wilson Snyder
2008-08-06 12:52:39 -04:00
parent a76ae67a81
commit 500dc2170f
16 changed files with 396 additions and 94 deletions
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src/V3AssertPre.cpp
+31 -8
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@@ -60,6 +60,9 @@ private:
if (!senip) nodep->v3error("Unsupported: Unclocked assertion");
return newp;
}
void clearAssertInfo() {
m_senip = NULL;
}
// VISITORS //========== Statements
virtual void visit(AstPslDefClock* nodep, AstNUser*) {
@@ -70,28 +73,48 @@ private:
nodep->unlinkFrBack();
pushDeletep(nodep); nodep=NULL;
}
virtual void visit(AstClocking* nodep, AstNUser*) {
UINFO(8," CLOCKING"<<nodep<<endl);
AstSenItem* lastp = m_seniDefaultp;
{
// Store the new default clock only in this scope
m_seniDefaultp = nodep->sensesp();
nodep->iterateChildren(*this);
}
m_seniDefaultp = lastp;
// Trash it
nodep->replaceWith(nodep->bodysp()->unlinkFrBack());
pushDeletep(nodep); nodep=NULL;
}
virtual void visit(AstPslCover* nodep, AstNUser*) {
// Prep
m_senip = NULL;
if (nodep->sentreep()) return; // Already processed
clearAssertInfo();
nodep->iterateChildren(*this);
nodep->sentreep(newSenTree(nodep));
m_senip = NULL;
clearAssertInfo();
}
virtual void visit(AstPslAssert* nodep, AstNUser*) {
// Prep
m_senip = NULL;
if (nodep->sentreep()) return; // Already processed
clearAssertInfo();
nodep->iterateChildren(*this);
nodep->sentreep(newSenTree(nodep));
m_senip = NULL;
clearAssertInfo();
}
virtual void visit(AstPslClocked* nodep, AstNUser*) {
nodep->iterateChildren(*this);
if (m_senip) {
nodep->v3error("Unsupported: Only one PSL clock allowed per assertion\n");
}
// Unlink and just keep a pointer to it, convert to sentree as needed
// Block is the new expression to evaluate
AstNode* blockp = nodep->propp()->unlinkFrBack();
if (nodep->disablep()) {
blockp = new AstAnd(nodep->disablep()->fileline(),
new AstNot(nodep->disablep()->fileline(),
nodep->disablep()->unlinkFrBack()),
blockp);
}
// Unlink and just keep a pointer to it, convert to sentree as needed
m_senip = nodep->sensesp();
nodep->replaceWith(blockp);
pushDeletep(nodep); nodep=NULL;
@@ -108,8 +131,8 @@ private:
public:
// CONSTRUCTORS
AssertPreVisitor(AstNetlist* nodep) {
m_senip = NULL;
m_seniDefaultp = NULL;
clearAssertInfo();
// Process
nodep->accept(*this);
}