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| author | David Shah <dave@ds0.me> | 2020-11-12 11:48:21 +0000 |
|---|---|---|
| committer | David Shah <dave@ds0.me> | 2020-11-30 08:45:28 +0000 |
| commit | c7ad3cece64a7e3de7789c57d91d79cc361966e8 (patch) | |
| tree | d8ff137f99bd73aa0f1087468f97cd16774946c0 | |
| parent | a69c595802bb20517ced3a2a82a6dde4b8dc6a03 (diff) | |
| download | nextpnr-c7ad3cece64a7e3de7789c57d91d79cc361966e8.tar.gz nextpnr-c7ad3cece64a7e3de7789c57d91d79cc361966e8.tar.bz2 nextpnr-c7ad3cece64a7e3de7789c57d91d79cc361966e8.zip | |
nexus: Tweak delay heuristics
Signed-off-by: David Shah <dave@ds0.me>
| -rw-r--r-- | nexus/arch.cc | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/nexus/arch.cc b/nexus/arch.cc index f4a88dfb..6cc0da0f 100644 --- a/nexus/arch.cc +++ b/nexus/arch.cc @@ -545,19 +545,21 @@ 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; + return 100 * dist_x + 100 * dist_y + 250; } delay_t Arch::predictDelay(const NetInfo *net_info, const PortRef &sink) const { if (net_info->driver.cell == nullptr || net_info->driver.cell->bel == BelId() || sink.cell->bel == BelId()) return 0; + if (sink.port == id_FCI) + return 0; int src_x = net_info->driver.cell->bel.tile % chip_info->width, src_y = net_info->driver.cell->bel.tile / chip_info->width; int dst_x = sink.cell->bel.tile % chip_info->width, dst_y = sink.cell->bel.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; + return 100 * dist_x + 100 * dist_y + 250; } bool Arch::getBudgetOverride(const NetInfo *net_info, const PortRef &sink, delay_t &budget) const { return false; } |