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timing: Don't include false startpoints in async paths

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2018-11-02 19:13:50 +00:00
parent cba9b528e8
commit fad69d4930
1 changed files with 8 additions and 2 deletions
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10
common/timing.cc
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@ -237,10 +237,14 @@ struct Timing
// Go forwards topographically to find the maximum arrival time and max path length for each net
for (auto net : topographical_order) {
if (!net_data.count(net))
continue;
auto &nd_map = net_data.at(net);
for (auto &startdomain : nd_map) {
ClockEvent start_clk = startdomain.first;
auto &nd = startdomain.second;
if (nd.false_startpoint)
continue;
const auto net_arrival = nd.max_arrival;
const auto net_length_plus_one = nd.max_path_length + 1;
nd.min_remaining_budget = clk_period;
@ -282,6 +286,8 @@ struct Timing
// Now go backwards topographically to determine the minimum path slack, and to distribute all path slack evenly
// between all nets on the path
for (auto net : boost::adaptors::reverse(topographical_order)) {
if (!net_data.count(net))
continue;
auto &nd_map = net_data.at(net);
for (auto &startdomain : nd_map) {
auto &nd = startdomain.second;
@ -399,7 +405,7 @@ struct Timing
continue;
// And find the fanin net with the latest arrival time
if (net_data.at(port.second.net).count(crit_pair.first.start)) {
if (net_data.count(port.second.net) && net_data.at(port.second.net).count(crit_pair.first.start)) {
const auto net_arrival = net_data.at(port.second.net).at(crit_pair.first.start).max_arrival;
if (net_arrival > max_arrival) {
max_arrival = net_arrival;
@ -593,7 +599,7 @@ void timing_analysis(Context *ctx, bool print_histogram, bool print_fmax, bool p
log_info(" Sink %s.%s\n", sink_cell->name.c_str(ctx), sink->port.c_str(ctx));
last_port = sink->port;
}
};
for (auto &clock : clock_reports) {