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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/V3Assert.cpp
+88 -17
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@@ -47,28 +47,58 @@ private:
V3Double0 m_statAsCover; // Statistic tracking
V3Double0 m_statAsPsl; // Statistic tracking
V3Double0 m_statAsFull; // Statistic tracking
V3Double0 m_statAsSV; // Statistic tracking
// METHODS
AstNode* newFireAssert(AstNode* nodep, const string& message) {
AstNode* bodysp = new AstDisplay
(nodep->fileline(), '\0',
(string("[%0t] %%Error: ")+nodep->fileline()->filebasename()
+":"+cvtToStr(nodep->fileline()->lineno())
+": Assertion failed in %m"
+((message != "")?": ":"")+message
+"\\n"),
NULL,
new AstTime(nodep->fileline()));
bodysp->addNext(new AstStop (nodep->fileline()));
string assertDisplayMessage(AstNode* nodep, const string& prefix, const string& message) {
return (string("[%0t] "+prefix+": ")+nodep->fileline()->filebasename()
+":"+cvtToStr(nodep->fileline()->lineno())
+": Assertion failed in %m"
+((message != "")?": ":"")+message
+"\\n");
}
void replaceDisplay(AstDisplay* nodep, const string& prefix) {
nodep->displayType(AstDisplayType::WRITE);
nodep->text(assertDisplayMessage(nodep, prefix, nodep->text()));
AstNode* timesp = nodep->exprsp(); if (timesp) timesp->unlinkFrBack();
timesp = timesp->addNext(new AstTime(nodep->fileline()));
nodep->exprsp(timesp);
}
AstNode* newIfAssertOn(AstNode* nodep) {
// Add a internal if to check assertions are on.
// Don't make this a AND term, as it's unlikely to need to test this.
bodysp = new AstIf (nodep->fileline(),
new AstCMath(nodep->fileline(), "Verilated::assertOn()", 1),
bodysp, NULL);
return new AstIf (nodep->fileline(),
// If assertions are off, have constant propagation rip them out later
// This allows syntax errors and such to be detected normally.
(v3Global.opt.assertOn()
? (AstNode*)(new AstCMath(nodep->fileline(), "Verilated::assertOn()", 1))
: (AstNode*)(new AstConst(nodep->fileline(), V3Number(nodep->fileline(), 1, 0)))),
nodep, NULL);
}
AstNode* newIfCoverageOn(AstNode* nodep) {
// Add a internal if to check coverage is on
// Don't make this a AND term, as it's unlikely to need to test this.
return new AstIf (nodep->fileline(),
// If assertions are off, have constant propagation rip them out later
// This allows syntax errors and such to be detected normally.
(v3Global.opt.coverage()
? (AstNode*)(new AstConst(nodep->fileline(), V3Number(nodep->fileline(), 1, 1)))
: (AstNode*)(new AstConst(nodep->fileline(), V3Number(nodep->fileline(), 1, 0)))),
nodep, NULL);
}
AstNode* newFireAssert(AstNode* nodep, const string& message) {
AstDisplay* dispp = new AstDisplay (nodep->fileline(), AstDisplayType::ERROR, message, NULL, NULL);
AstNode* bodysp = dispp;
replaceDisplay(dispp, "%%Error"); // Convert to standard DISPLAY format
bodysp->addNext(new AstStop (nodep->fileline()));
bodysp = newIfAssertOn(bodysp);
return bodysp;
}
void newAssertion(AstNode* nodep, AstNode* propp, AstSenTree* sentreep, const string& message) {
void newPslAssertion(AstNode* nodep, AstNode* propp, AstSenTree* sentreep, const string& message) {
propp->unlinkFrBack();
sentreep->unlinkFrBack();
//
@@ -114,6 +144,28 @@ private:
pushDeletep(nodep); nodep=NULL;
}
void newVAssertion(AstVAssert* nodep, AstNode* propp) {
propp->unlinkFrBackWithNext();
AstNode* passsp = nodep->passsp(); if (passsp) passsp->unlinkFrBackWithNext();
AstNode* failsp = nodep->failsp(); if (failsp) failsp->unlinkFrBackWithNext();
//
if (nodep->castVAssert()) {
if (passsp) passsp = newIfAssertOn(passsp);
if (failsp) failsp = newIfAssertOn(failsp);
} else {
nodep->v3fatalSrc("Unknown node type");
}
AstIf* ifp = new AstIf (nodep->fileline(), propp, passsp, failsp);
AstNode* newp = ifp;
if (nodep->castVAssert()) ifp->branchPred(AstBranchPred::UNLIKELY);
//
// Install it
nodep->replaceWith(newp);
// Bye
pushDeletep(nodep); nodep=NULL;
}
// VISITORS //========== Case assertions
virtual void visit(AstCase* nodep, AstNUser*) {
nodep->iterateChildren(*this);
@@ -163,16 +215,34 @@ private:
}
// VISITORS //========== Statements
virtual void visit(AstDisplay* nodep, AstNUser*) {
nodep->iterateChildren(*this);
// Replace the special types with standard text
if (nodep->displayType()==AstDisplayType::INFO) {
replaceDisplay(nodep, "-Info");
} else if (nodep->displayType()==AstDisplayType::WARNING) {
replaceDisplay(nodep, "%%Warning");
} else if (nodep->displayType()==AstDisplayType::ERROR
|| nodep->displayType()==AstDisplayType::FATAL) {
replaceDisplay(nodep, "%%Error");
}
}
virtual void visit(AstPslCover* nodep, AstNUser*) {
nodep->iterateChildren(*this);
newAssertion(nodep, nodep->propp(), nodep->sentreep(), nodep->name()); nodep=NULL;
newPslAssertion(nodep, nodep->propp(), nodep->sentreep(), nodep->name()); nodep=NULL;
m_statAsCover++;
}
virtual void visit(AstPslAssert* nodep, AstNUser*) {
nodep->iterateChildren(*this);
newAssertion(nodep, nodep->propp(), nodep->sentreep(), nodep->name()); nodep=NULL;
newPslAssertion(nodep, nodep->propp(), nodep->sentreep(), nodep->name()); nodep=NULL;
m_statAsPsl++;
}
virtual void visit(AstVAssert* nodep, AstNUser*) {
nodep->iterateChildren(*this);
newVAssertion(nodep, nodep->propp()); nodep=NULL;
m_statAsSV++;
}
virtual void visit(AstModule* nodep, AstNUser*) {
m_modp = nodep;
@@ -203,6 +273,7 @@ public:
}
virtual ~AssertVisitor() {
V3Stats::addStat("Assertions, PSL asserts", m_statAsPsl);
V3Stats::addStat("Assertions, SystemVerilog asserts", m_statAsSV);
V3Stats::addStat("Assertions, cover statements", m_statAsCover);
V3Stats::addStat("Assertions, full/parallel case", m_statAsFull);
}