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placer1: Fix cost delta calculation

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-12-07 20:54:41 +00:00 committed by David Shah
parent 2ef2d2b2cb
commit 3938ea41fc
1 changed files with 3 additions and 1 deletions
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4
common/placer1.cc
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@ -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;