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Internals: Create AstNodeSelItem in prep for future commits.

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No real functional change, outside of minor debug dump differences.
This commit is contained in:
Wilson Snyder
2008-11-20 07:55:54 -05:00
parent ab668b066f
commit ddbfc176b6
15 changed files with 186 additions and 153 deletions
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src/V3Clock.cpp
+47 -45
View File
@@ -106,48 +106,57 @@ private:
m_scopep->addVarp(newvscp);
return newvscp;
}
AstNode* createSenItemEquation(AstSenItem* nodep) {
// We know the var is clean, and one bit, so we use binary ops
// for speed instead of logical ops.
// POSEDGE: var & ~var_last
// NEGEDGE: ~var & var_last
// BOTHEDGE: var ^ var_last
// HIGHEDGE: var
// LOWEDGE: ~var
AstNode* newp = NULL;
AstVarScope* clkvscp = nodep->varrefp()->varScopep();
if (nodep->edgeType()==AstEdgeType::POSEDGE) {
AstVarScope* lastVscp = getCreateLastClk(clkvscp);
newp = new AstAnd(nodep->fileline(),
new AstVarRef(nodep->fileline(),
nodep->varrefp()->varScopep(), false),
new AstNot(nodep->fileline(),
new AstVarRef(nodep->fileline(),
lastVscp, false)));
} else if (nodep->edgeType()==AstEdgeType::NEGEDGE) {
AstVarScope* lastVscp = getCreateLastClk(clkvscp);
newp = new AstAnd(nodep->fileline(),
new AstNot(nodep->fileline(),
new AstVarRef(nodep->fileline(),
nodep->varrefp()->varScopep(), false)),
new AstVarRef(nodep->fileline(), lastVscp, false));
} else if (nodep->edgeType()==AstEdgeType::BOTHEDGE) {
AstVarScope* lastVscp = getCreateLastClk(clkvscp);
newp = new AstXor(nodep->fileline(),
new AstVarRef(nodep->fileline(),
nodep->varrefp()->varScopep(), false),
new AstVarRef(nodep->fileline(), lastVscp, false));
} else if (nodep->edgeType()==AstEdgeType::HIGHEDGE) {
newp = new AstVarRef(nodep->fileline(),
clkvscp, false);
} else if (nodep->edgeType()==AstEdgeType::LOWEDGE) {
newp = new AstNot(nodep->fileline(),
new AstVarRef(nodep->fileline(),
clkvscp, false));
} else {
nodep->v3fatalSrc("Bad edge type");
}
return newp;
}
AstNode* createSenseEquation(AstSenTree* nodep) {
AstNode* senEqnp = NULL;
for (AstSenItem* senp = nodep->sensesp(); senp; senp=senp->nextp()->castSenItem()) {
// We know the var is clean, and one bit, so we use binary ops
// for speed instead of logical ops.
// POSEDGE: var & ~var_last
// NEGEDGE: ~var & var_last
// BOTHEDGE: var ^ var_last
// HIGHEDGE: var
// LOWEDGE: ~var
AstVarScope* lastVscp = senp->varrefp()->varScopep()->userp()->castNode()->castVarScope();
for (AstNodeSenItem* senp = nodep->sensesp(); senp; senp=senp->nextp()->castNodeSenItem()) {
AstNode* senOnep = NULL;
if (senp->edgeType()==AstEdgeType::POSEDGE) {
if (!lastVscp) senp->v3fatalSrc("No last var ptr?\n");
senOnep = new AstAnd(senp->fileline(),
new AstVarRef(senp->fileline(),
senp->varrefp()->varScopep(), false),
new AstNot(senp->fileline(),
new AstVarRef(senp->fileline(),
lastVscp, false)));
} else if (senp->edgeType()==AstEdgeType::NEGEDGE) {
if (!lastVscp) senp->v3fatalSrc("No last var ptr?\n");
senOnep = new AstAnd(senp->fileline(),
new AstNot(senp->fileline(),
new AstVarRef(senp->fileline(),
senp->varrefp()->varScopep(), false)),
new AstVarRef(senp->fileline(), lastVscp, false));
} else if (senp->edgeType()==AstEdgeType::BOTHEDGE) {
if (!lastVscp) senp->v3fatalSrc("No last var ptr?\n");
senOnep = new AstXor(senp->fileline(),
new AstVarRef(senp->fileline(),
senp->varrefp()->varScopep(), false),
new AstVarRef(senp->fileline(), lastVscp, false));
} else if (senp->edgeType()==AstEdgeType::HIGHEDGE) {
senOnep = new AstVarRef(senp->fileline(),
senp->varrefp()->varScopep(), false);
} else if (senp->edgeType()==AstEdgeType::LOWEDGE) {
senOnep = new AstNot(senp->fileline(),
new AstVarRef(senp->fileline(),
senp->varrefp()->varScopep(), false));
if (AstSenItem* itemp = senp->castSenItem()) {
senOnep = createSenItemEquation(itemp);
} else {
senp->v3fatalSrc("Bad edge type");
senp->v3fatalSrc("Strange node under sentree");
}
if (senEqnp) {
// Add new OR to the sensitivity list equation
@@ -159,13 +168,6 @@ private:
return senEqnp;
}
AstIf* makeActiveIf(AstSenTree* sensesp) {
for (AstSenItem* senp = sensesp->sensesp(); senp; senp=senp->nextp()->castSenItem()) {
if (senp->edgeType() != AstEdgeType::HIGHEDGE
&& senp->varrefp()) {
AstVarScope* oldvscp = senp->varrefp()->varScopep();
getCreateLastClk(oldvscp);
}
}
AstNode* senEqnp = createSenseEquation(sensesp);
if (!senEqnp) sensesp->v3fatalSrc("No sense equation, shouldn't be in sequent activation.");
AstIf* newifp = new AstIf (sensesp->fileline(),