diff options
| -rw-r--r-- | common/placer1.cc | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/common/placer1.cc b/common/placer1.cc index 74a11040..be20c072 100644 --- a/common/placer1.cc +++ b/common/placer1.cc @@ -145,6 +145,7 @@ class SAPlacer } int n_no_progress = 0; + wirelen_t min_metric = curr_metric; double avg_metric = curr_metric; temp = 10000; @@ -169,6 +170,12 @@ class SAPlacer try_swap_position(cell, try_bel); } } + + if (curr_metric < min_metric) { + min_metric = curr_metric; + improved = true; + } + // Heuristic to improve placement on the 8k if (improved) n_no_progress = 0; @@ -222,6 +229,9 @@ class SAPlacer ctx->shuffle(autoplaced); assign_budget(ctx); } + else { + update_budget(ctx); + } // Recalculate total metric entirely to avoid rounding errors // accumulating over time @@ -365,8 +375,8 @@ class SAPlacer // SA acceptance criterea if (delta < 0 || (temp > 1e-6 && (ctx->rng() / float(0x3fffffff)) <= std::exp(-delta / temp))) { n_accept++; - if (delta < 2) - improved = true; + //if (delta < 2) + // improved = true; } else { if (other != IdString()) ctx->unbindBel(oldBel); |