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-rw-r--r--common/route.cc49
1 files changed, 49 insertions, 0 deletions
diff --git a/common/route.cc b/common/route.cc
index 952c266b..17e3b63b 100644
--- a/common/route.cc
+++ b/common/route.cc
@@ -318,6 +318,55 @@ void route_design(Design *design, bool verbose)
log_info("found %d unrouted nets. starting routing procedure.\n",
int(netsQueue.size()));
+ float estimatedTotalDelay = 0.0;
+ int estimatedTotalDelayCnt = 0;
+
+ for (auto net_name : netsQueue) {
+ auto net_info = design->nets.at(net_name);
+
+ auto src_bel = net_info->driver.cell->bel;
+
+ if (src_bel == BelId())
+ continue;
+
+ IdString driver_port = net_info->driver.port;
+
+ auto driver_port_it = net_info->driver.cell->pins.find(driver_port);
+ if (driver_port_it != net_info->driver.cell->pins.end())
+ driver_port = driver_port_it->second;
+
+ auto src_wire = chip.getWireBelPin(src_bel, portPinFromId(driver_port));
+
+ if (src_wire == WireId())
+ continue;
+
+ for (auto &user_it : net_info->users) {
+ auto dst_bel = user_it.cell->bel;
+
+ if (dst_bel == BelId())
+ continue;
+
+ IdString user_port = user_it.port;
+
+ auto user_port_it = user_it.cell->pins.find(user_port);
+
+ if (user_port_it != user_it.cell->pins.end())
+ user_port = user_port_it->second;
+
+ auto dst_wire =
+ chip.getWireBelPin(dst_bel, portPinFromId(user_port));
+
+ if (dst_wire == WireId())
+ continue;
+
+ estimatedTotalDelay += chip.estimateDelay(src_wire, dst_wire);
+ estimatedTotalDelayCnt++;
+ }
+ }
+
+ log_info("estimated total wire delay: %.2f (avg %.2f)\n",
+ estimatedTotalDelay, estimatedTotalDelay / estimatedTotalDelayCnt);
+
while (!netsQueue.empty()) {
int visitCnt = 0, revisitCnt = 0, netCnt = 0;