From 42522c492cd7da25ee5b1ace941a93e01fe94038 Mon Sep 17 00:00:00 2001
From: gatecat <gatecat@ds0.me>
Date: Sun, 15 Aug 2021 09:34:50 +0100
Subject: [PATCH] router2: Alternative congestion cost schedule

Signed-off-by: gatecat <gatecat@ds0.me>
---
 common/router2.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/router2.cc b/common/router2.cc
index cb5f3eab..0e3a6ebb 100644
--- a/common/router2.cc
+++ b/common/router2.cc
@@ -1402,7 +1402,7 @@ struct Router2
                      total_overuse, overused_wires > 0 ? "NA" : std::to_string(arch_fail).c_str());
             ++iter;
             if (curr_cong_weight < 1e9)
-                curr_cong_weight *= cfg.curr_cong_mult;
+                curr_cong_weight += cfg.curr_cong_mult;
         } while (!failed_nets.empty());
         if (cfg.perf_profile) {
             std::vector<std::pair<int, IdString>> nets_by_runtime;