diff options
| -rw-r--r-- | common/timing.cc | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/common/timing.cc b/common/timing.cc index 85896f54..ce293f34 100644 --- a/common/timing.cc +++ b/common/timing.cc @@ -427,15 +427,17 @@ void TimingAnalyser::walk_backward() // Input port: propagate delay back through net, subtracting route delay NetInfo *net = port_info(p).net; if (net != nullptr && net->driver.cell != nullptr) - set_required_time(CellPortKey(net->driver), req.first, req.second.value - pd.route_delay, - req.second.path_length, p); + set_required_time(CellPortKey(net->driver), req.first, + req.second.value - DelayPair(pd.route_delay.maxDelay()), req.second.path_length, + p); } else if (pd.type == PORT_OUT) { // Output port : propagate delay back through cell, subtracting combinational delay for (auto &fanin : pd.cell_arcs) { if (fanin.type != CellArc::COMBINATIONAL) continue; set_required_time(CellPortKey(p.cell, fanin.other_port), req.first, - req.second.value - fanin.value.delayPair(), req.second.path_length + 1, p); + req.second.value - DelayPair(fanin.value.maxDelay()), req.second.path_length + 1, + p); } } } |