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[timing] Add legend

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This commit is contained in:
Eddie Hung 2019-01-27 11:43:55 -08:00
parent 70e37f6d27
commit 5afa31d031
1 changed files with 10 additions and 3 deletions
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13
common/timing.cc
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@ -642,7 +642,14 @@ struct Timing
log_info("Writing timing.dot\n");
std::ofstream f("timing.dot");
f << "digraph T {" << std::endl;
f << "\tlabel=\"clk_period=" << clk_period << "\";" << std::endl;
f << "\tlabel=<<font point-size=\"32\">clk_period=" << clk_period << "</font>"
<< "<font point-size=\"24\"><i>"
<< "<br/><b>Nodes</b> represent ports, clustered by their cells, and annotated with max arrival times."
<< "<br/><b>Filled nodes</b> represent timing start points (i.e. flip-flops)."
<< "<br/><b>Solid edges</b> represent inter-cell delays (i.e. nets) and are annotated with net name at its center, as well as net delay/budget at its head."
<< "<br/><b>Dotted edges</b> represent intra-cell delays and are annotated with this value."
<< "</i></font>>;"
<< std::endl;
f << "\tlabelloc=t;" << std::endl;
// Use the new ranking algorithm in dot to allow ranking of nodes across clusters
f << "\tnewrank=true;" << std::endl;
@ -699,9 +706,9 @@ struct Timing
output_ports.push_back(port.first);
// Label port
f << "\t\t" << "\"" << cell.second->name.str(ctx) << "." << port.first.str(ctx) << "\" [label = \"" << port.first.str(ctx);
for (const auto &i : net_data.at(port.second.net)) {
// A:d for each clock event, label node with event as well as max arrival time
for (const auto &i : net_data.at(port.second.net))
f << "\\n" << (i.first.edge == RISING_EDGE ? "posedge" : "negedge") << " " << i.first.clock.str(ctx) << " @ " << i.second.max_arrival;
}
f << "\"";
// IOB outputs are startpoints
if (ctx->getBelIOB(cell.second->bel))