From 76543d05e7ef9b7bd87b7641ace08360d81dc023 Mon Sep 17 00:00:00 2001 From: David Shah Date: Wed, 18 Nov 2020 10:54:52 +0000 Subject: nexus: Tweak heuristics to improve routeability Signed-off-by: David Shah --- nexus/arch.cc | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/nexus/arch.cc b/nexus/arch.cc index 3a279f4a..1ecf168d 100644 --- a/nexus/arch.cc +++ b/nexus/arch.cc @@ -545,7 +545,7 @@ delay_t Arch::estimateDelay(WireId src, WireId dst) const int dst_x = dst.tile % chip_info->width, dst_y = dst.tile / chip_info->width; int dist_x = std::abs(src_x - dst_x); int dist_y = std::abs(src_y - dst_y); - return 100 * dist_x + 100 * dist_y + 250; + return 75 * dist_x + 75 * dist_y + 200; } delay_t Arch::predictDelay(const NetInfo *net_info, const PortRef &sink) const { @@ -608,7 +608,7 @@ bool Arch::place() cfg.cellGroups.back().insert(id_OXIDE_COMB); cfg.cellGroups.back().insert(id_OXIDE_FF); - cfg.beta = 0.7; + cfg.beta = 0.6; cfg.criticalityExponent = 7; if (!placer_heap(getCtx(), cfg)) return false; -- cgit v1.2.3