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Internals: Cdc notes; marking submodules won't work

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This commit is contained in:
Wilson Snyder 2011-01-18 21:37:53 -05:00
parent a435ae98f9
commit a9f14b294f
1 changed files with 15 additions and 10 deletions
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25
src/V3Cdc.cpp
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@ -65,9 +65,9 @@ class CdcEitherVertex : public V3GraphVertex {
AstNode* m_nodep;
AstSenTree* m_srcDomainp;
AstSenTree* m_dstDomainp;
bool m_srcDomainSet;
bool m_dstDomainSet;
bool m_asyncPath;
bool m_srcDomainSet:1;
bool m_dstDomainSet:1;
bool m_asyncPath:1;
public:
CdcEitherVertex(V3Graph* graphp, AstScope* scopep, AstNode* nodep)
: V3GraphVertex(graphp), m_scopep(scopep), m_nodep(nodep)
@ -109,11 +109,12 @@ public:
};
class CdcLogicVertex : public CdcEitherVertex {
bool m_hazard;
bool m_isFlop;
bool m_hazard:1;
bool m_isFlop:1;
public:
CdcLogicVertex(V3Graph* graphp, AstScope* scopep, AstNode* nodep, AstSenTree* sensenodep)
: CdcEitherVertex(graphp,scopep,nodep), m_hazard(false), m_isFlop(false)
: CdcEitherVertex(graphp,scopep,nodep)
, m_hazard(false), m_isFlop(false)
{ srcDomainp(sensenodep); dstDomainp(sensenodep); }
virtual ~CdcLogicVertex() {}
// Accessors
@ -132,7 +133,7 @@ class CdcDumpVisitor : public CdcBaseVisitor {
private:
// NODE STATE
//Entire netlist:
// {statement}Node::user3p -> bool, indicating not hazard
// {statement}Node::user3 -> bool, indicating not hazard
ofstream* m_ofp; // Output file
string m_prefix;
@ -290,9 +291,12 @@ private:
void setNodeHazard(AstNode* nodep) {
// Need to not clear if warnings are off (rather than when report it)
// as bypassing this warning may turn up another path that isn't warning off'ed.
// We can't modifyWarnOff here, as one instantiation might not be an issue until we find a hitting flop
// Furthermore, a module like a "Or" module would only get flagged once,
// even though the signals feeding it are radically different.
if (!m_domainp || m_domainp->hasCombo()) { // Source flop logic in a posedge block is OK for reset (not async though)
if (m_logicVertexp && !nodep->fileline()->warnIsOff(V3ErrorCode::CDCRSTLOGIC)) {
UINFO(9,"Set hazard "<<nodep<<endl);
UINFO(8,"Set hazard "<<nodep<<endl);
m_logicVertexp->setHazard(nodep);
}
}
@ -335,7 +339,7 @@ private:
if (CdcVarVertex* vvertexp = dynamic_cast<CdcVarVertex*>(itp)) {
if (vvertexp->cntAsyncRst()) {
m_userGeneration++; // Effectively a userClearVertices()
UINFO(9, " Trace One async: "<<vvertexp<<endl);
UINFO(8, " Trace One async: "<<vvertexp<<endl);
// Twice, as we need to detect, then propagate
CdcEitherVertex* markp = traceAsyncRecurse(vvertexp, false);
if (markp) { // Mark is non-NULL if something bad on this path
@ -351,7 +355,8 @@ private:
}
CdcEitherVertex* traceAsyncRecurse(CdcEitherVertex* vertexp, bool mark) {
// Return vertex of any hazardous stuff attached, or NULL if OK
// First pass: Return vertex of any hazardous stuff attached, or NULL if OK
// If first pass returns true, second pass calls asyncPath() on appropriate nodes
if (vertexp->user()>=m_userGeneration) return false; // Processed - prevent loop
vertexp->user(m_userGeneration);