diff options
Diffstat (limited to 'ice40')
| -rw-r--r-- | ice40/place_legaliser.cc | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/ice40/place_legaliser.cc b/ice40/place_legaliser.cc index 9fde179d..ba09e250 100644 --- a/ice40/place_legaliser.cc +++ b/ice40/place_legaliser.cc @@ -114,17 +114,55 @@ class PlacementLegaliser public: PlacementLegaliser(Context *ctx) : ctx(ctx){}; + void print_stats(const char *point) + { + float distance_sum = 0; + float max_distance = 0; + int moved_cells = 0; + for (auto orig : originalPositions) { + if (ctx->cells.at(orig.first)->bel == BelId()) + continue; + Loc newLoc = ctx->getBelLocation(ctx->cells.at(orig.first)->bel); + if (newLoc != orig.second) { + float distance = std::sqrt(std::pow(newLoc.x - orig.second.x, 2) + pow(newLoc.y - orig.second.y, 2)); + moved_cells++; + distance_sum += distance; + if (distance > max_distance) + max_distance = distance; + } + } + log_info(" moved %d cells (after %s)\n", moved_cells, point); + if (moved_cells > 0) { + log_info(" average distance %f\n", (distance_sum / moved_cells)); + log_info(" maximum distance %f\n", max_distance); + } + } + bool legalise() { log_info("Legalising design..\n"); + for (auto &cell : ctx->cells) { + CellInfo *ci = cell.second.get(); + if (!ctx->getBelGlobalBuf(ci->bel) && cell.second->type == ctx->id("ICESTORM_LC")) { + originalPositions[cell.first] = ctx->getBelLocation(ci->bel); + } + } init_logic_cells(); bool legalised_carries = legalise_carries(); if (!legalised_carries && !ctx->force) return false; + print_stats("carry legalisation"); legalise_others(); + print_stats("misc. cell legalisation"); legalise_logic_tiles(); + print_stats("logic cell legalisation"); bool replaced_cells = replace_cells(); + print_stats("cell replacement"); + ctx->assignArchInfo(); + + + return legalised_carries && replaced_cells; } @@ -501,6 +539,7 @@ class PlacementLegaliser Context *ctx; std::unordered_set<IdString> rippedCells; std::unordered_set<IdString> createdCells; + std::unordered_map<IdString, Loc> originalPositions; // Go from X and Y position to logic cells, setting occupied to true if a Bel is unavailable std::vector<std::vector<std::vector<std::pair<BelId, bool>>>> logic_bels; }; |