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| author | David Shah <davey1576@gmail.com> | 2018-12-07 20:54:41 +0000 |
|---|---|---|
| committer | David Shah <dave@ds0.me> | 2019-03-22 10:31:28 +0000 |
| commit | 3938ea41fc00afc441c411c3de0403d4652d08c4 (patch) | |
| tree | f3d63148f9b44465ea9302f341175a86154ec021 | |
| parent | 2ef2d2b2cb7cb2e54f8a0d8d5476e361ec5e68ea (diff) | |
| download | nextpnr-3938ea41fc00afc441c411c3de0403d4652d08c4.tar.gz nextpnr-3938ea41fc00afc441c411c3de0403d4652d08c4.tar.bz2 nextpnr-3938ea41fc00afc441c411c3de0403d4652d08c4.zip | |
placer1: Fix cost delta calculation
Signed-off-by: David Shah <davey1576@gmail.com>
| -rw-r--r-- | common/placer1.cc | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/common/placer1.cc b/common/placer1.cc index baddf4eb..fe56b4af 100644 --- a/common/placer1.cc +++ b/common/placer1.cc @@ -431,7 +431,7 @@ class SAPlacer new_dist += get_constraints_distance(ctx, other_cell); delta = lambda * (moveChange.timing_delta / last_timing_cost) + (1 - lambda) * (double(moveChange.wirelen_delta) / last_wirelen_cost); - delta += (cfg.constraintWeight / temp) * (new_dist - old_dist); + delta += (cfg.constraintWeight / temp) * (new_dist - old_dist) / last_wirelen_cost; n_move++; // SA acceptance criterea if (delta < 0 || (temp > 1e-6 && (ctx->rng() / float(0x0fffffff)) <= std::exp(-delta / temp))) { @@ -578,6 +578,8 @@ class SAPlacer changed_arcs.clear(); new_net_bounds.clear(); new_arc_costs.clear(); + wirelen_delta = 0; + timing_delta = 0; } } moveChange; |