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placer1: Improve handling of regions

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2018-12-14 13:40:29 +00:00
parent a8289b699f
commit 0118ac00c4
1 changed files with 53 additions and 4 deletions
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57
common/placer1.cc
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@ -115,7 +115,29 @@ class SAPlacer
net.second->udata = n++;
net_by_udata.push_back(net.second.get());
}
for (auto &region : sorted(ctx->region)) {
Region *r = region.second;
BoundingBox bb;
if (r->constr_bels) {
bb.x0 = std::numeric_limits<int>::max();
bb.x1 = std::numeric_limits<int>::min();
bb.y0 = std::numeric_limits<int>::max();
bb.y1 = std::numeric_limits<int>::min();
for (auto bel : r->bels) {
Loc loc = ctx->getBelLocation(bel);
bb.x0 = std::min(bb.x0, loc.x);
bb.x1 = std::max(bb.x1, loc.x);
bb.y0 = std::min(bb.y0, loc.y);
bb.y1 = std::max(bb.y1, loc.y);
}
} else {
bb.x0 = 0;
bb.y0 = 0;
bb.x1 = max_x;
bb.y1 = max_y;
}
region_bounds[r->name] = bb;
}
build_port_index();
}
@ -382,7 +404,8 @@ class SAPlacer
ctx->unbindBel(cell->bel);
}
IdString targetType = cell->type;
for (auto bel : ctx->getBels()) {
auto proc_bel = [&](BelId bel) {
if (ctx->getBelType(bel) == targetType && ctx->isValidBelForCell(cell, bel)) {
if (ctx->checkBelAvail(bel)) {
uint64_t score = ctx->rng64();
@ -400,7 +423,18 @@ class SAPlacer
}
}
}
};
if (cell->region != nullptr && cell->region->constr_bels) {
for (auto bel : cell->region->bels) {
proc_bel(bel);
}
} else {
for (auto bel : ctx->getBels()) {
proc_bel(bel);
}
}
if (best_bel == BelId()) {
if (iters == 0 || ripup_bel == BelId())
log_error("failed to place cell '%s' of type '%s'\n", cell->name.c_str(ctx), cell->type.c_str(ctx));
@ -593,9 +627,22 @@ class SAPlacer
{
IdString targetType = cell->type;
Loc curr_loc = ctx->getBelLocation(cell->bel);
int count = 0;
int dx = diameter, dy = diameter;
if (cell->region != nullptr && cell->region->constr_bels) {
dx = std::min(diameter, (region_bounds[cell->region->name].x1 - region_bounds[cell->region->name].x0) + 1);
dy = std::min(diameter, (region_bounds[cell->region->name].y1 - region_bounds[cell->region->name].y0) + 1);
// Clamp location to within bounds
curr_loc.x = std::max(region_bounds[cell->region->name].x0, curr_loc.x);
curr_loc.x = std::min(region_bounds[cell->region->name].x1, curr_loc.x);
curr_loc.y = std::max(region_bounds[cell->region->name].y0, curr_loc.y);
curr_loc.y = std::min(region_bounds[cell->region->name].y1, curr_loc.y);
}
while (true) {
int nx = ctx->rng(2 * diameter + 1) + std::max(curr_loc.x - diameter, 0);
int ny = ctx->rng(2 * diameter + 1) + std::max(curr_loc.y - diameter, 0);
int nx = ctx->rng(2 * dx + 1) + std::max(curr_loc.x - dx, 0);
int ny = ctx->rng(2 * dy + 1) + std::max(curr_loc.y - dy, 0);
int beltype_idx, beltype_cnt;
std::tie(beltype_idx, beltype_cnt) = bel_types.at(targetType);
if (beltype_cnt < cfg.minBelsForGridPick)
@ -617,6 +664,7 @@ class SAPlacer
continue;
if (locked_bels.find(bel) != locked_bels.end())
continue;
count++;
return bel;
}
}
@ -842,6 +890,7 @@ class SAPlacer
int n_move, n_accept;
int diameter = 35, max_x = 1, max_y = 1;
std::unordered_map<IdString, std::tuple<int, int>> bel_types;
std::unordered_map<IdString, BoundingBox> region_bounds;
std::vector<std::vector<std::vector<std::vector<BelId>>>> fast_bels;
std::unordered_set<BelId> locked_bels;
std::vector<NetInfo *> net_by_udata;