File size: 1,920 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 | // This program demonstrates how to change units for
// dimensional analysis.
//
// Design : unit.v
// SDC : unit.sdc
// SPEF : unit.spef
// Library: osu018_stdcells.lib
#include <ot/timer/timer.hpp>
int main(int argc, char *argv[]) {
ot::Timer timer;
// read the design
timer.read_celllib("osu018_stdcells.lib")
.read_verilog("unit.v")
.read_sdc("unit.sdc")
.read_spef("unit.spef")
.update_timing();
// the default library is at ns and pf scale.
std::cout << timer.time_unit()->value() << " second (time unit)\n"
<< timer.capacitance_unit()->value() << " farad (capacitance unit)\n"
<< "TNS: " << *timer.report_tns() << '\n';
// change to ps and ff.
timer.set_time_unit(ot::second_t(1e-12))
.set_capacitance_unit(ot::farad_t(1e-15))
.update_timing();
// dump the timer details
std::cout << timer.time_unit()->value() << " second (time unit)\n"
<< timer.capacitance_unit()->value() << " farad (capacitance unit)\n"
<< "TNS: " << *timer.report_tns() << '\n';
// change back to ns and pf
timer.set_time_unit(ot::second_t(1e-9))
.set_capacitance_unit(ot::farad_t(1e-12f))
.update_timing();
// dump the timer details
std::cout << timer.time_unit()->value() << " second (time unit)\n"
<< timer.capacitance_unit()->value() << " farad (capacitance unit)\n"
<< "TNS: " << *timer.report_tns() << '\n';
// scale the time unit by half
timer.set_time_unit(ot::second_t(2e-9))
.set_capacitance_unit(ot::farad_t(2e-12f))
.update_timing();
// dump the timer details
std::cout << timer.time_unit()->value() << " second (time unit)\n"
<< timer.capacitance_unit()->value() << " farad (capacitance unit)\n"
<< "TNS: " << *timer.report_tns() << '\n';
return 0;
}
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