diff options
| -rw-r--r-- | common/route.cc | 10 | ||||
| -rw-r--r-- | common/route.h | 2 | ||||
| -rw-r--r-- | ice40/main.cc | 40 |
3 files changed, 52 insertions, 0 deletions
diff --git a/common/route.cc b/common/route.cc index 657075ce..39e420d3 100644 --- a/common/route.cc +++ b/common/route.cc @@ -161,6 +161,7 @@ struct Router std::unordered_map<WireId, delay_t> src_wires; src_wires[src_wire] = 0; route(src_wires, dst_wire); + routedOkay = visited.count(dst_wire); } Router(Context *ctx, IdString net_name, bool ripup = false, @@ -526,4 +527,13 @@ bool route_design(Context *ctx) return true; } +bool get_actual_route_delay(Context *ctx, WireId src_wire, WireId dst_wire, + delay_t &delay) +{ + Router router(ctx, src_wire, dst_wire); + if (router.routedOkay) + delay = router.visited.at(dst_wire).delay; + return router.routedOkay; +} + NEXTPNR_NAMESPACE_END diff --git a/common/route.h b/common/route.h index 33927f26..af0de42e 100644 --- a/common/route.h +++ b/common/route.h @@ -25,6 +25,8 @@ NEXTPNR_NAMESPACE_BEGIN extern bool route_design(Context *ctx); +extern bool get_actual_route_delay(Context *ctx, WireId src_wire, + WireId dst_wire, delay_t &delay); NEXTPNR_NAMESPACE_END diff --git a/ice40/main.cc b/ice40/main.cc index 8a04caf6..ea7c9a66 100644 --- a/ice40/main.cc +++ b/ice40/main.cc @@ -86,6 +86,7 @@ int main(int argc, char *argv[]) options.add_options()("seed", po::value<int>(), "seed value for random number generator"); options.add_options()("version,V", "show version"); + options.add_options()("tmfuzz", "run path delay estimate fuzzer"); options.add_options()("lp384", "set device type to iCE40LP384"); options.add_options()("lp1k", "set device type to iCE40LP1K"); options.add_options()("lp8k", "set device type to iCE40LP8K"); @@ -220,6 +221,45 @@ int main(int argc, char *argv[]) std::cout << "</svg>\n"; } + if (vm.count("tmfuzz")) { + std::vector<WireId> src_wires, dst_wires; + + for (auto w : ctx.getWires()) + src_wires.push_back(w); + + for (auto b : ctx.getBels()) { + if (ctx.getBelType(b) == TYPE_ICESTORM_LC) { + dst_wires.push_back(ctx.getWireBelPin(b, PIN_I0)); + dst_wires.push_back(ctx.getWireBelPin(b, PIN_I1)); + dst_wires.push_back(ctx.getWireBelPin(b, PIN_I2)); + dst_wires.push_back(ctx.getWireBelPin(b, PIN_I3)); + dst_wires.push_back(ctx.getWireBelPin(b, PIN_CEN)); + dst_wires.push_back(ctx.getWireBelPin(b, PIN_CIN)); + } + if (ctx.getBelType(b) == TYPE_SB_IO) { + dst_wires.push_back(ctx.getWireBelPin(b, PIN_D_OUT_0)); + dst_wires.push_back(ctx.getWireBelPin(b, PIN_OUTPUT_ENABLE)); + } + } + + ctx.shuffle(src_wires); + ctx.shuffle(dst_wires); + + for (int i = 0; i < int(src_wires.size()) && i < int(dst_wires.size()); + i++) { + delay_t actual_delay; + if (!get_actual_route_delay(&ctx, src_wires[i], dst_wires[i], + actual_delay)) + continue; + printf("%s %s %.3f %.3f\n", + ctx.getWireName(src_wires[i]).c_str(&ctx), + ctx.getWireName(dst_wires[i]).c_str(&ctx), + ctx.getDelayNS(actual_delay), + ctx.getDelayNS( + ctx.estimateDelay(src_wires[i], dst_wires[i]))); + } + } + if (vm.count("json")) { std::string filename = vm["json"].as<std::string>(); std::istream *f = new std::ifstream(filename); |