caiyu/nextpnr
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Try with vector

Browse Source
This commit is contained in:
Eddie Hung 2018-08-09 19:10:50 -07:00
parent 41e05c95aa
commit e419b34027
1 changed files with 47 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
common/placer1.cc
View File

@ -70,6 +70,20 @@ class SAPlacer
fast_bels.at(type_idx).at(loc.x).at(loc.y).push_back(bel);
}
diameter = std::max(max_x, max_y) + 1;
curr_cost.reserve(ctx->nets.size());
new_cost.reserve(ctx->nets.size());
old_udata.reserve(ctx->nets.size());
decltype(NetInfo::udata) n = 0;
for (auto &net : ctx->nets) {
old_udata.emplace_back(net.second->udata);
net.second->udata = n++;
}
}
~SAPlacer() {
for (auto &net : ctx->nets)
net.second->udata = old_udata[net.second->udata];
}
bool place()
@ -149,7 +163,8 @@ class SAPlacer
curr_tns = 0;
for (auto &net : ctx->nets) {
wirelen_t wl = get_net_metric(ctx, net.second.get(), MetricType::COST, curr_tns);
metrics[net.first] = wl;
curr_cost[net.second->udata] = wl;
new_cost[net.second->udata] = -1;
curr_metric += wl;
}
@ -250,7 +265,8 @@ class SAPlacer
curr_tns = 0;
for (auto &net : ctx->nets) {
wirelen_t wl = get_net_metric(ctx, net.second.get(), MetricType::COST, curr_tns);
metrics[net.first] = wl;
curr_cost[net.second->udata] = wl;
new_cost[net.second->udata] = -1;
curr_metric += wl;
}
@ -339,10 +355,8 @@ class SAPlacer
// Attempt a SA position swap, return true on success or false on failure
bool try_swap_position(CellInfo *cell, BelId newBel)
{
static std::unordered_set<NetInfo *> update;
static std::vector<std::pair<IdString, wirelen_t>> new_lengths;
new_lengths.clear();
update.clear();
static std::vector<NetInfo*> updates;
updates.clear();
BelId oldBel = cell->bel;
CellInfo *other_cell = ctx->getBoundBelCell(newBel);
if (other_cell != nullptr && other_cell->belStrength > STRENGTH_WEAK) {
@ -358,14 +372,23 @@ class SAPlacer
ctx->unbindBel(newBel);
}
for (const auto &port : cell->ports)
if (port.second.net != nullptr)
update.insert(port.second.net);
for (const auto &port : cell->ports) {
if (port.second.net != nullptr) {
auto &cost = new_cost[port.second.net->udata];
if (cost == 0) continue;
cost = 0;
updates.emplace_back(port.second.net);
}
}
if (other_cell != nullptr) {
for (const auto &port : other_cell->ports)
if (port.second.net != nullptr)
update.insert(port.second.net);
if (port.second.net != nullptr) {
auto &cost = new_cost[port.second.net->udata];
if (cost == 0) continue;
cost = 0;
updates.emplace_back(port.second.net);
}
}
ctx->bindBel(newBel, cell, STRENGTH_WEAK);
@ -383,12 +406,12 @@ class SAPlacer
new_metric = curr_metric;
// Recalculate metrics for all nets touched by the peturbation
for (auto net : update) {
new_metric -= metrics.at(net->name);
for (const auto &net : updates) {
new_metric -= curr_cost[net->udata];
float temp_tns = 0;
wirelen_t net_new_wl = get_net_metric(ctx, net, MetricType::COST, temp_tns);
new_metric += net_new_wl;
new_lengths.push_back(std::make_pair(net->name, net_new_wl));
new_cost[net->udata] = net_new_wl;
}
new_dist = get_constraints_distance(ctx, cell);
@ -407,8 +430,10 @@ class SAPlacer
goto swap_fail;
}
curr_metric = new_metric;
for (auto new_wl : new_lengths)
metrics.at(new_wl.first) = new_wl.second;
for (const auto &net : updates) {
curr_cost[net->udata] = new_cost[net->udata];
new_cost[net->udata] = -1;
}
return true;
swap_fail:
@ -416,6 +441,8 @@ class SAPlacer
if (other_cell != nullptr) {
ctx->bindBel(newBel, other_cell, STRENGTH_WEAK);
}
for (const auto &net : updates)
new_cost[net->udata] = -1;
return false;
}
@ -444,7 +471,6 @@ class SAPlacer
}
Context *ctx;
std::unordered_map<IdString, wirelen_t> metrics;
wirelen_t curr_metric = std::numeric_limits<wirelen_t>::max();
float curr_tns = 0;
float temp = 1000;
@ -459,6 +485,10 @@ class SAPlacer
const float post_legalise_temp = 10;
const float post_legalise_dia_scale = 1.5;
Placer1Cfg cfg;
std::vector<wirelen_t> curr_cost;
std::vector<wirelen_t> new_cost;
std::vector<decltype(NetInfo::udata)> old_udata;
};
bool placer1(Context *ctx, Placer1Cfg cfg)