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| author | David Shah <dave@ds0.me> | 2020-02-01 15:37:50 +0000 |
|---|---|---|
| committer | David Shah <dave@ds0.me> | 2020-03-22 21:17:59 +0000 |
| commit | 4b54253c24e6d1bae4dc25e95c25ef95d8d07086 (patch) | |
| tree | 1a1c6c7729d5fb747ebfc8e36af11bc6592fb2c2 /common | |
| parent | a621e04062c1ce73c3df8552793f705807257a3b (diff) | |
| download | nextpnr-4b54253c24e6d1bae4dc25e95c25ef95d8d07086.tar.gz nextpnr-4b54253c24e6d1bae4dc25e95c25ef95d8d07086.tar.bz2 nextpnr-4b54253c24e6d1bae4dc25e95c25ef95d8d07086.zip | |
router2: Prevent overflow
Signed-off-by: David Shah <dave@ds0.me>
Diffstat (limited to 'common')
| -rw-r--r-- | common/router2.cc | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/common/router2.cc b/common/router2.cc index 00760c78..26e78eaa 100644 --- a/common/router2.cc +++ b/common/router2.cc @@ -747,7 +747,7 @@ struct Router2 total_wire_use += int(wire.bound_nets.size()); int overuse = int(wire.bound_nets.size()) - 1; if (overuse > 0) { - wire.hist_cong_cost += overuse * hist_cong_weight; + wire.hist_cong_cost = std::min(1e9, wire.hist_cong_cost + overuse * hist_cong_weight); total_overuse += overuse; overused_wires += 1; for (auto &bound : wire.bound_nets) @@ -1082,7 +1082,8 @@ struct Router2 log_info(" iter=%d wires=%d overused=%d overuse=%d archfail=%s\n", iter, total_wire_use, overused_wires, total_overuse, overused_wires > 0 ? "NA" : std::to_string(arch_fail).c_str()); ++iter; - curr_cong_weight *= cfg.curr_cong_mult; + if (curr_cong_weight < 1e9) + curr_cong_weight *= cfg.curr_cong_mult; } while (!failed_nets.empty()); if (cfg.perf_profile) { std::vector<std::pair<int, IdString>> nets_by_runtime; |