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Support $past.

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This commit is contained in:
Wilson Snyder
2018-09-23 15:20:01 -04:00
parent a8519a7a53
commit 0e37747d2c
16 changed files with 328 additions and 9 deletions
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src/V3Assert.cpp
+37 -2
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@@ -45,6 +45,7 @@ private:
// STATE
AstNodeModule* m_modp; // Last module
AstBegin* m_beginp; // Last begin
unsigned m_modPastNum; // Module past numbering
V3Double0 m_statAsCover; // Statistic tracking
V3Double0 m_statAsPsl; // Statistic tracking
V3Double0 m_statAsFull; // Statistic tracking
@@ -185,6 +186,7 @@ private:
pushDeletep(nodep); VL_DANGLING(nodep);
}
// VISITORS
virtual void visit(AstIf* nodep) {
if (nodep->user1SetOnce()) return;
if (nodep->uniquePragma() || nodep->unique0Pragma()) {
@@ -244,7 +246,7 @@ private:
}
}
// VISITORS //========== Case assertions
//========== Case assertions
virtual void visit(AstCase* nodep) {
iterateChildren(nodep);
if (!nodep->user1SetOnce()) {
@@ -302,7 +304,38 @@ private:
}
}
// VISITORS //========== Statements
//========== Past
virtual void visit(AstPast* nodep) {
iterateChildren(nodep);
uint32_t ticks = 1;
if (nodep->ticksp()) {
if (!VN_IS(nodep->ticksp(), Const)) nodep->v3fatalSrc("Expected constant ticks, checked in V3Width");
ticks = VN_CAST(nodep->ticksp(), Const)->toUInt();
}
if (ticks<1) nodep->v3fatalSrc("0 tick should have been checked in V3Width");
AstNode* inp = nodep->exprp()->unlinkFrBack();
AstVar* invarp = NULL;
AstSenTree* sentreep = nodep->sentreep(); sentreep->unlinkFrBack();
AstAlways* alwaysp = new AstAlways(nodep->fileline(), VAlwaysKwd::ALWAYS,
sentreep, NULL);
m_modp->addStmtp(alwaysp);
for (uint32_t i=0; i<ticks; ++i) {
AstVar* outvarp = new AstVar(nodep->fileline(), AstVarType::MODULETEMP,
"_Vpast_"+cvtToStr(m_modPastNum++)+"_"+cvtToStr(i),
inp->dtypep());
m_modp->addStmtp(outvarp);
AstNode* assp = new AstAssignDly(nodep->fileline(),
new AstVarRef(nodep->fileline(), outvarp, true),
inp);
alwaysp->addStmtp(assp);
//if (debug()>-9) assp->dumpTree(cout, "-ass: ");
invarp = outvarp;
inp = new AstVarRef(nodep->fileline(), invarp, false);
}
nodep->replaceWith(inp);
}
//========== Statements
virtual void visit(AstDisplay* nodep) {
iterateChildren(nodep);
// Replace the special types with standard text
@@ -330,6 +363,7 @@ private:
virtual void visit(AstNodeModule* nodep) {
m_modp = nodep;
m_modPastNum = 0;
//
iterateChildren(nodep);
// Reset defaults
@@ -354,6 +388,7 @@ public:
explicit AssertVisitor(AstNetlist* nodep) {
m_beginp = NULL;
m_modp = NULL;
m_modPastNum = 0;
// Process
iterate(nodep);
}