File size: 2,155 Bytes
d1be154 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | // This program demonstrates how to use OpenTimer's API to
// run a simple timing-driven optimization loop plus
// incremental timing update.
// Design : optimizer.v
// SDC : optimizer.sdc
// SPEF : optimizer.spef change_1.spef
// Library: optimizer_Early.lib (early/ min split)
// Library: optimizer_Late.lib (late / max split)
#include <ot/timer/timer.hpp>
int main(int argc, char *argv[]) {
ot::Timer timer;
// Read design
timer.read_celllib("optimizer_Early.lib", ot::MIN)
.read_celllib("optimizer_Late.lib", ot::MAX)
.read_verilog("optimizer.v")
.read_spef("optimizer.spef")
.read_sdc("optimizer.sdc");
// Report the TNS and WNS
if(std::optional<float> tns = timer.report_tns(); tns) {
std::cout << "TNS: " << *tns << '\n';
}
else {
std::cout << "TNS is not available\n";
}
if(std::optional<float> wns = timer.report_wns(); wns) {
std::cout << "WNS: " << *wns << '\n';
}
else {
std::cout << "WNS is not available\n";
}
// repower a gate and insert a buffer
timer.repower_gate("inst_10", "INV_X16")
.insert_gate("TAUGATE_1", "BUF_X2")
.insert_net("TAUNET_1")
.disconnect_pin("inst_3:ZN")
.connect_pin("inst_3:ZN", "TAUNET_1")
.connect_pin("TAUGATE_1:A", "TAUNET_1")
.connect_pin("TAUGATE_1:Z", "net_14")
.read_spef("change_1.spef");
// report the slack at a G17
std::cout << "Late/Fall slack at pin G17: "
<< *timer.report_slack("G17", ot::MAX, ot::FALL)
<< '\n';
// report the arrival time at G17
std::cout << "Late/Fall arrival time at pin G17: "
<< *timer.report_at("G17", ot::MAX, ot::FALL)
<< '\n';
// report the required arrival time at G17
std::cout << "Late/Fall required arrival time at pin G17: "
<< *timer.report_rat("G17", ot::MAX, ot::FALL)
<< '\n';
// report the path after optimization
auto opt_path = timer.report_timing(1);
// compare
std::cout << "Critical path after optimization: \n" << opt_path[0];
// dump the slack
timer.dump_slack(std::cout);
return 0;
}
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