luke/verilator
1
0
Fork 0
mirror of https://github.com/verilator/verilator.git synced 2026-10-06 10:03:44 +02:00
Code Issues Packages Projects Releases Wiki Activity

Support disable task by name (#6853) (#7136)

Browse Source
This commit is contained in:
Nick Brereton
2026-03-23 19:56:31 -07:00
committed by GitHub
parent 716b404256
commit 3b328d2bb6
26 changed files with 1168 additions and 149 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/V3Timing.cpp
+29
View File
@@ -742,6 +742,34 @@ class TimingControlVisitor final : public VNVisitor {
addDebugInfo(donep);
beginp->addStmtsp(donep->makeStmt());
}
static bool hasDisableQueuePushSelfPrefix(const AstBegin* const beginp) {
// LinkJump prepends disable-by-name registration as:
// __VprocessQueue_*.push_back(std::process::self())
const AstStmtExpr* const stmtExprp = VN_CAST(beginp->stmtsp(), StmtExpr);
if (!stmtExprp) return false;
const AstCMethodHard* const methodp = VN_CAST(stmtExprp->exprp(), CMethodHard);
if (!methodp || methodp->name() != "push_back") return false;
const AstVarRef* const queueRefp = VN_CAST(methodp->fromp(), VarRef);
return queueRefp && queueRefp->name().rfind("__VprocessQueue_", 0) == 0;
}
// Register a callback so killing a process-backed fork branch decrements the join counter
void addForkOnKill(AstBegin* const beginp, AstVarScope* const forkVscp) const {
if (!beginp->needProcess() && !hasDisableQueuePushSelfPrefix(beginp)) return;
FileLine* const flp = beginp->fileline();
AstCMethodHard* const onKillp = new AstCMethodHard{
flp, new AstVarRef{flp, forkVscp, VAccess::WRITE}, VCMethod::FORK_ON_KILL};
onKillp->dtypeSetVoid();
AstCExpr* const processp = new AstCExpr{flp, "vlProcess"};
processp
->dtypeSetVoid(); // Opaque process reference; type is irrelevant for hardcoded emit
onKillp->addPinsp(processp);
AstNodeStmt* const stmtp = onKillp->makeStmt();
if (beginp->stmtsp()) {
beginp->stmtsp()->addHereThisAsNext(stmtp);
} else {
beginp->addStmtsp(stmtp);
}
}
// Handle the 'join' part of a fork..join
void makeForkJoin(AstFork* const forkp) {
// Create a fork sync var
@@ -754,6 +782,7 @@ class TimingControlVisitor final : public VNVisitor {
unsigned joinCount = 0; // Needed for join counter
// Add a <fork sync>.done() to each begin
for (AstNode* beginp = forkp->forksp(); beginp; beginp = beginp->nextp()) {
addForkOnKill(VN_AS(beginp, Begin), forkVscp);
addForkDone(VN_AS(beginp, Begin), forkVscp);
joinCount++;
}