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ice40: Print legalisation statistics

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-07-30 16:13:02 +02:00
parent 1cde20273a
commit edc6cf8b23
1 changed files with 39 additions and 0 deletions
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39
ice40/place_legaliser.cc
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@ -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;
};