2015-04-08 03:45:11 -05:00
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#include "coloquinte/detailed.hxx"
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#include "coloquinte/circuit_helper.hxx"
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#include "coloquinte/optimization_subproblems.hxx"
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#include "coloquinte/union_find.hxx"
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#include "coloquinte/piecewise_linear.hxx"
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#include <cassert>
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#include <iostream>
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namespace coloquinte{
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namespace dp{
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namespace{
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struct minmax{
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int_t min, max;
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minmax(){}
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minmax(int_t f, int_t s) : min(f), max(s){}
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void merge(minmax const o){
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min = std::min(min, o.min);
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max = std::max(max, o.max);
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}
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void merge(int_t const o){
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merge(minmax(o, o));
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}
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};
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struct order_gettr{
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index_t cell_ind, seq_order;
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bool operator<(order_gettr const o) const{ return cell_ind < o.cell_ind; }
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bool operator<(index_t const o) const{ return cell_ind < o; }
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order_gettr(index_t c, index_t i) : cell_ind(c), seq_order(i) {}
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};
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std::vector<order_gettr> get_sorted_ordered_cells(std::vector<index_t> const & cells){
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std::vector<order_gettr> ret;
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for(index_t i=0; i<cells.size(); ++i){
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ret.push_back(order_gettr(cells[i],i));
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}
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std::sort(ret.begin(), ret.end());
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return ret;
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}
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std::vector<index_t> get_unique_nets(netlist const & circuit, std::vector<index_t> const & cells){
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std::vector<index_t> involved_nets;
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for(index_t c : cells){
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for(netlist::pin_t p : circuit.get_cell(c)){
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involved_nets.push_back(p.net_ind);
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}
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}
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// Uniquify the nets
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std::sort(involved_nets.begin(), involved_nets.end());
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involved_nets.resize(std::distance(involved_nets.begin(), std::unique(involved_nets.begin(), involved_nets.end())));
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return involved_nets;
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}
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struct Hnet_group{
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struct Hpin{
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index_t cell_index; // Not indexes in the circuit!!! Rather in the internal algorithm
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minmax offset;
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bool operator<(Hpin const o) const{ return cell_index < o.cell_index; }
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};
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struct Hnet{
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bool has_ext_pins;
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minmax ext_pins;
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int_t weight;
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Hnet(){
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has_ext_pins = false;
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ext_pins = minmax(std::numeric_limits<int_t>::max(), 0);
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weight = 1;
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}
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};
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std::vector<index_t> net_limits;
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std::vector<Hnet> nets;
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std::vector<Hpin> pins;
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std::vector<int_t> cell_widths;
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Hnet_group(){
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net_limits.push_back(0);
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}
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void add_net(std::vector<pin_1D> const added_pins, int_t weight){
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Hnet cur_net;
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cur_net.weight = weight;
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std::vector<Hpin> new_pins;
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for(auto const p : added_pins){
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if(p.movable){
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Hpin new_pin;
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new_pin.cell_index = p.cell_ind;
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new_pin.offset = minmax(p.offs, p.offs);
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new_pins.push_back(new_pin);
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}
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else{
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cur_net.has_ext_pins = true;
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cur_net.ext_pins.merge(p.pos);
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}
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}
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std::sort(new_pins.begin(), new_pins.end());
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if(not new_pins.empty()){ // Possible when generating from a Steiner topology
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// Uniquify just in case there are several pins on the net on a single cell
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index_t j=0;
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auto prev_pin = new_pins[0];
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for(auto it = new_pins.begin()+1; it != new_pins.end(); ++it){
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if(it->cell_index == prev_pin.cell_index){
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prev_pin.offset.merge(it->offset);
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}
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else{
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new_pins[j] = prev_pin;
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++j;
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prev_pin = *it;
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}
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}
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new_pins[j]=prev_pin;
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new_pins.resize(j+1);
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nets.push_back(cur_net);
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net_limits.push_back(net_limits.back() + new_pins.size());
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pins.insert(pins.end(), new_pins.begin(), new_pins.end());
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}
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}
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std::int64_t get_cost(std::vector<int_t> const & pos) const{
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std::int64_t cost=0;
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for(index_t n=0; n<nets.size(); ++n){
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auto cur_net = nets[n];
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minmax mm(std::numeric_limits<int_t>::max(), std::numeric_limits<int_t>::min());
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if(cur_net.has_ext_pins){
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mm = cur_net.ext_pins;
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}
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assert(net_limits[n+1] > net_limits[n]);
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for(index_t p=net_limits[n]; p<net_limits[n+1]; ++p){
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int_t cur_pos = pos[pins[p].cell_index];
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mm.merge( minmax(cur_pos + pins[p].offset.min, cur_pos + pins[p].offset.max) );
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}
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cost += static_cast<std::int64_t>(cur_net.weight) * (mm.max - mm.min);
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}
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return cost;
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}
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std::int64_t get_cost(std::vector<int_t> const & pos, std::vector<int> const & flip) const{
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std::int64_t cost=0;
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for(index_t n=0; n<nets.size(); ++n){
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auto cur_net = nets[n];
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minmax mm(std::numeric_limits<int_t>::max(), std::numeric_limits<int_t>::min());
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if(cur_net.has_ext_pins){
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mm = cur_net.ext_pins;
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}
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assert(net_limits[n+1] > net_limits[n]);
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for(index_t p=net_limits[n]; p<net_limits[n+1]; ++p){
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int_t cur_pos = pos[pins[p].cell_index];
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bool flipped = flip[pins[p].cell_index];
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int_t wdth = cell_widths[pins[p].cell_index];
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mm.merge( flipped ?
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minmax(cur_pos + wdth - pins[p].offset.max, cur_pos + wdth - pins[p].offset.min)
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: minmax(cur_pos + pins[p].offset.min, cur_pos + pins[p].offset.max)
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);
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}
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cost += static_cast<std::int64_t>(cur_net.weight) * (mm.max - mm.min);
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}
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return cost;
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}
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};
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Hnet_group get_B2B_netgroup(netlist const & circuit, detailed_placement const & pl, std::vector<index_t> const & cells){
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std::vector<order_gettr> cells_in_row = get_sorted_ordered_cells(cells);
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std::vector<index_t> involved_nets = get_unique_nets(circuit, cells);
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Hnet_group ret;
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for(index_t c : cells)
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2015-07-27 08:36:50 -05:00
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ret.cell_widths.push_back(circuit.get_cell(c).size.x);
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2015-04-08 03:45:11 -05:00
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for(index_t n : involved_nets){
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2015-07-27 08:36:50 -05:00
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std::vector<pin_1D> cur_pins = get_pins_1D(circuit, pl.plt_, n).x;
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2015-04-08 03:45:11 -05:00
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for(pin_1D & p : cur_pins){
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auto it = std::lower_bound(cells_in_row.begin(), cells_in_row.end(), p.cell_ind);
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if(it != cells_in_row.end() and it->cell_ind == p.cell_ind){
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p.cell_ind = it->seq_order;
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}
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else{ // Found a pin which remains fixed for this round
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p.movable = false;
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}
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}
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ret.add_net(cur_pins, circuit.get_net(n).weight);
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}
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return ret;
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}
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Hnet_group get_RSMT_netgroup(netlist const & circuit, detailed_placement const & pl, std::vector<index_t> const & cells){
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std::vector<order_gettr> cells_in_row = get_sorted_ordered_cells(cells);
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std::vector<index_t> involved_nets = get_unique_nets(circuit, cells);
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Hnet_group ret;
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for(index_t c : cells)
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2015-07-27 08:36:50 -05:00
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ret.cell_widths.push_back(circuit.get_cell(c).size.x);
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2015-04-08 03:45:11 -05:00
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for(index_t n : involved_nets){
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auto vpins = get_pins_2D(circuit, pl.plt_, n);
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for(auto & p : vpins){
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auto it = std::lower_bound(cells_in_row.begin(), cells_in_row.end(), p.cell_ind);
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if(it != cells_in_row.end() and it->cell_ind == p.cell_ind){
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p.cell_ind = it->seq_order;
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}
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else{
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p.movable = false;
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}
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}
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std::vector<point<int_t> > pin_locations;
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for(auto p : vpins)
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pin_locations.push_back(p.pos);
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2015-07-27 08:36:50 -05:00
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auto const Htopo = get_RSMT_topology(pin_locations, 8).x;
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2015-04-08 03:45:11 -05:00
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// In the horizontal topology, we transform the parts of the tree that are on the row into HPWL subnets
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// Two pins sharing an edge are in the same subnet if one of them is on the row: use union-find
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union_find UF(vpins.size());
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for(auto E : Htopo){
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if( vpins[E.first].movable or vpins[E.second].movable){
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UF.merge(E.first, E.second);
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}
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}
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std::vector<std::vector<pin_1D> > connex_comps(vpins.size());
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for(index_t i=0; i<vpins.size(); ++i){
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connex_comps[UF.find(i)].push_back(vpins[i].x());;
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}
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int_t weight = circuit.get_net(n).weight;
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for(index_t i=0; i<vpins.size(); ++i){
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if(not connex_comps[i].empty()){
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ret.add_net(connex_comps[i], weight);
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}
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}
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}
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return ret;
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}
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// Optimizes an ordered sequence of standard cells on the same row, returns the cost and the corresponding positions
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inline std::int64_t optimize_convex_sequence(Hnet_group const & nets, std::vector<index_t> const & permutation, std::vector<int_t> & positions, std::vector<std::pair<int_t, int_t> > const & cell_ranges){
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// Get the widths of the cells in row order
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std::vector<int_t> loc_widths(permutation.size());
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std::vector<std::pair<int_t, int_t> > loc_ranges(permutation.size());
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for(index_t i=0; i<permutation.size(); ++i){
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loc_widths[permutation[i]] = nets.cell_widths[i];
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loc_ranges[permutation[i]] = cell_ranges[i];
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}
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std::vector<cell_bound> bounds;
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std::vector<int_t> right_slopes(permutation.size(), 0);
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for(index_t n=0; n<nets.nets.size(); ++n){
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index_t fst_c=std::numeric_limits<index_t>::max(), lst_c=0;
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int_t fst_pin_offs=0, lst_pin_offs=0;
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assert(nets.net_limits[n+1] > nets.net_limits[n]);
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auto cur_net = nets.nets[n];
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for(index_t p=nets.net_limits[n]; p<nets.net_limits[n+1]; ++p){
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// Permutation: index in the Hnet_group to index in the row
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index_t cur_cell = permutation[nets.pins[p].cell_index];
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if(cur_cell < fst_c){
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fst_c = cur_cell;
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fst_pin_offs = nets.pins[p].offset.min;
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}
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if(cur_cell >= lst_c){
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lst_c = cur_cell;
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lst_pin_offs = nets.pins[p].offset.max;
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}
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}
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if(cur_net.has_ext_pins){
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bounds.push_back(cell_bound(fst_c, cur_net.ext_pins.min - fst_pin_offs, cur_net.weight));
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bounds.push_back(cell_bound(lst_c, cur_net.ext_pins.max - lst_pin_offs, cur_net.weight));
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right_slopes[lst_c] += cur_net.weight;
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}
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else{
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right_slopes[lst_c] += cur_net.weight;
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right_slopes[fst_c] -= cur_net.weight;
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}
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}
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bool feasible = place_convex_single_row(loc_widths, loc_ranges, bounds, right_slopes, positions);
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auto permuted_positions = positions;
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|
|
|
for(index_t i=0; i<permutation.size(); ++i){
|
|
|
|
|
permuted_positions[i] = positions[permutation[i]];
|
|
|
|
|
}
|
|
|
|
|
if(feasible)
|
|
|
|
|
return nets.get_cost(permuted_positions);
|
|
|
|
|
else
|
|
|
|
|
return std::numeric_limits<std::int64_t>::max(); // Infeasible: return a very big cost
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// TODO: take modified order relative to the obstacles into account
|
|
|
|
|
inline std::int64_t optimize_noncvx_sequence(Hnet_group const & nets, std::vector<index_t> const & permutation, std::vector<int_t> & positions, std::vector<int> & flippings, std::vector<int> const & flippability, std::vector<std::pair<int_t, int_t> > const & cell_ranges){
|
|
|
|
|
// Get the widths of the cells in row order
|
|
|
|
|
std::vector<int_t> loc_widths(permutation.size());
|
|
|
|
|
std::vector<int> loc_flipps(permutation.size());
|
|
|
|
|
std::vector<std::pair<int_t, int_t> > loc_ranges(permutation.size());
|
|
|
|
|
for(index_t i=0; i<permutation.size(); ++i){
|
|
|
|
|
loc_widths[permutation[i]] = nets.cell_widths[i];
|
|
|
|
|
loc_ranges[permutation[i]] = cell_ranges[i];
|
|
|
|
|
loc_flipps[permutation[i]] = flippability[i];
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int_t min_limit = std::numeric_limits<int_t>::min();
|
|
|
|
|
for(index_t i=0; i<loc_ranges.size(); ++i){
|
|
|
|
|
min_limit = std::max(loc_ranges[i].first, min_limit);
|
|
|
|
|
loc_ranges[i].first = min_limit;
|
|
|
|
|
min_limit += loc_widths[i];
|
|
|
|
|
}
|
|
|
|
|
int_t max_limit = std::numeric_limits<int_t>::max();
|
|
|
|
|
for(index_t i=loc_ranges.size(); i>0; --i){
|
|
|
|
|
max_limit = std::min(loc_ranges[i-1].second, max_limit);
|
|
|
|
|
max_limit -= loc_widths[i-1];
|
|
|
|
|
loc_ranges[i-1].second = max_limit;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for(index_t i=0; i<loc_ranges.size(); ++i){
|
|
|
|
|
if(loc_ranges[i].first > loc_ranges[i].second){
|
|
|
|
|
return std::numeric_limits<std::int64_t>::max(); // Infeasible: return a very big cost
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
std::vector<piecewise_linear_function> unflipped_cost_functions, flipped_cost_functions;
|
|
|
|
|
for(index_t i=0; i<loc_ranges.size(); ++i){
|
|
|
|
|
auto cur = piecewise_linear_function(loc_ranges[i].first, loc_ranges[i].second);
|
|
|
|
|
unflipped_cost_functions.push_back(cur);
|
|
|
|
|
flipped_cost_functions.push_back(cur);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for(index_t n=0; n<nets.nets.size(); ++n){
|
|
|
|
|
index_t fst_c=std::numeric_limits<index_t>::max(), lst_c=0;
|
|
|
|
|
int_t fst_pin_offs_mn=0, lst_pin_offs_mn=0,
|
|
|
|
|
fst_pin_offs_mx=0, lst_pin_offs_mx=0;
|
|
|
|
|
|
|
|
|
|
assert(nets.net_limits[n+1] > nets.net_limits[n]);
|
|
|
|
|
auto cur_net = nets.nets[n];
|
|
|
|
|
for(index_t p=nets.net_limits[n]; p<nets.net_limits[n+1]; ++p){
|
|
|
|
|
// Permutation: index in the Hnet_group to index in the row
|
|
|
|
|
index_t cur_cell = permutation[nets.pins[p].cell_index];
|
|
|
|
|
if(cur_cell < fst_c){
|
|
|
|
|
fst_c = cur_cell;
|
|
|
|
|
fst_pin_offs_mn = nets.pins[p].offset.min;
|
|
|
|
|
fst_pin_offs_mx = nets.pins[p].offset.max;
|
|
|
|
|
}
|
|
|
|
|
if(cur_cell >= lst_c){
|
|
|
|
|
lst_c = cur_cell;
|
|
|
|
|
lst_pin_offs_mn = nets.pins[p].offset.min;
|
|
|
|
|
lst_pin_offs_mx = nets.pins[p].offset.max;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if(cur_net.has_ext_pins){
|
|
|
|
|
unflipped_cost_functions[fst_c].add_bislope(-cur_net.weight, 0, cur_net.ext_pins.min - fst_pin_offs_mn);
|
|
|
|
|
unflipped_cost_functions[lst_c].add_bislope(0, cur_net.weight, cur_net.ext_pins.max - lst_pin_offs_mx);
|
|
|
|
|
flipped_cost_functions[fst_c].add_bislope(-cur_net.weight, 0, cur_net.ext_pins.min - loc_widths[fst_c] + fst_pin_offs_mx);
|
|
|
|
|
flipped_cost_functions[lst_c].add_bislope(0, cur_net.weight, cur_net.ext_pins.max - loc_widths[lst_c] + lst_pin_offs_mn);
|
|
|
|
|
}
|
|
|
|
|
else{
|
|
|
|
|
unflipped_cost_functions[fst_c].add_monotone(-cur_net.weight, -fst_pin_offs_mn);
|
|
|
|
|
unflipped_cost_functions[lst_c].add_monotone( cur_net.weight, -lst_pin_offs_mx);
|
|
|
|
|
flipped_cost_functions[fst_c].add_monotone(-cur_net.weight, fst_pin_offs_mx - loc_widths[fst_c] );
|
|
|
|
|
flipped_cost_functions[lst_c].add_monotone( cur_net.weight, lst_pin_offs_mn - loc_widths[lst_c] );
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
std::vector<piecewise_linear_function> prev_mins, merged_costs;
|
|
|
|
|
for(index_t i=0; i<loc_ranges.size(); ++i){
|
|
|
|
|
merged_costs.push_back(loc_flipps[i] ?
|
|
|
|
|
piecewise_linear_function::minimum(unflipped_cost_functions[i], flipped_cost_functions[i])
|
|
|
|
|
: unflipped_cost_functions[i]
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
if(i>0){
|
|
|
|
|
prev_mins.push_back(prev_mins.back().previous_min_of_sum(merged_costs.back(), loc_widths[i-1]));
|
|
|
|
|
}
|
|
|
|
|
else{
|
|
|
|
|
prev_mins.push_back(merged_costs.back().previous_min());
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for(auto const M : prev_mins){
|
|
|
|
|
for(index_t i=0; i+1<M.point_values.size(); ++i){
|
|
|
|
|
assert(M.point_values[i].second >= M.point_values[i+1].second);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
flippings.resize(cell_ranges.size(), 0); positions.resize(cell_ranges.size(), 0);
|
|
|
|
|
|
|
|
|
|
int_t pos = std::numeric_limits<int_t>::max();
|
|
|
|
|
for(index_t i=loc_ranges.size(); i>0; --i){
|
|
|
|
|
// Find the best position and flipping for each cell
|
|
|
|
|
pos = prev_mins[i-1].last_before(std::min(pos - loc_widths[i-1], loc_ranges[i-1].second) );
|
|
|
|
|
positions[i-1] = pos;
|
|
|
|
|
|
|
|
|
|
if(loc_flipps[i-1] and flipped_cost_functions[i-1].value_at(pos) < unflipped_cost_functions[i-1].value_at(pos)){
|
|
|
|
|
flippings[i-1] = 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for(index_t i=0; i<loc_ranges.size(); ++i){
|
|
|
|
|
assert(positions[i] >= loc_ranges[i].first);
|
|
|
|
|
assert(positions[i] <= loc_ranges[i].second);
|
|
|
|
|
}
|
|
|
|
|
for(index_t i=0; i+1<loc_ranges.size(); ++i){
|
|
|
|
|
assert(positions[i] + loc_widths[i] <= positions[i+1]);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
auto permuted_positions = positions;
|
|
|
|
|
auto permuted_flippings = flippings;
|
|
|
|
|
for(index_t i=0; i<permutation.size(); ++i){
|
|
|
|
|
permuted_positions[i] = positions[permutation[i]];
|
|
|
|
|
permuted_flippings[i] = flippings[permutation[i]];
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return nets.get_cost(permuted_positions, permuted_flippings);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
std::vector<std::pair<int_t, int_t> > get_cell_ranges(netlist const & circuit, detailed_placement const & pl, std::vector<index_t> const & cells){
|
|
|
|
|
std::vector<std::pair<int_t, int_t> > lims;
|
|
|
|
|
|
|
|
|
|
for(index_t i=0; i+1<cells.size(); ++i){
|
2015-07-27 08:36:50 -05:00
|
|
|
assert(pl.plt_.positions_[cells[i]].x + circuit.get_cell(cells[i]).size.x <= pl.plt_.positions_[cells[i+1]].x);
|
2015-04-08 03:45:11 -05:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Extreme limits, except macros are allowed to be beyond the limit of the placement area
|
|
|
|
|
int_t lower_lim = pl.get_limit_positions(circuit, cells.front()).first;
|
|
|
|
|
int_t upper_lim = pl.get_limit_positions(circuit, cells.back()).second;
|
|
|
|
|
|
|
|
|
|
for(index_t OSRP_cell : cells){
|
|
|
|
|
auto attr = circuit.get_cell(OSRP_cell).attributes;
|
|
|
|
|
auto cur_lim = std::pair<int_t, int_t>(lower_lim, upper_lim);
|
2015-07-27 08:36:50 -05:00
|
|
|
int_t pos = pl.plt_.positions_[OSRP_cell].x;
|
2015-04-08 03:45:11 -05:00
|
|
|
if( (attr & XMovable) == 0 or pl.cell_height(OSRP_cell) != 1){
|
2015-07-27 08:36:50 -05:00
|
|
|
cur_lim = std::pair<int_t, int_t>(pos, pos + circuit.get_cell(OSRP_cell).size.x);
|
2015-04-08 03:45:11 -05:00
|
|
|
}
|
|
|
|
|
else{
|
|
|
|
|
assert(pos >= lower_lim);
|
2015-07-27 08:36:50 -05:00
|
|
|
assert(pos + circuit.get_cell(OSRP_cell).size.x <= upper_lim);
|
2015-04-08 03:45:11 -05:00
|
|
|
}
|
|
|
|
|
lims.push_back(cur_lim);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return lims;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
template<bool NON_CONVEX, bool RSMT>
|
|
|
|
|
void OSRP_generic(netlist const & circuit, detailed_placement & pl){
|
|
|
|
|
for(index_t r=0; r<pl.row_cnt(); ++r){
|
|
|
|
|
// Complete optimization on a row, comprising possible obstacles
|
|
|
|
|
|
|
|
|
|
std::vector<index_t> cells;
|
|
|
|
|
std::vector<int> flippability;
|
|
|
|
|
|
|
|
|
|
// Get the movable cells, if we can flip them, and the obstacles on the row
|
|
|
|
|
for(index_t OSRP_cell = pl.get_first_cell_on_row(r); OSRP_cell != null_ind; OSRP_cell = pl.get_next_cell_on_row(OSRP_cell, r)){
|
|
|
|
|
auto attr = circuit.get_cell(OSRP_cell).attributes;
|
|
|
|
|
cells.push_back(OSRP_cell);
|
|
|
|
|
flippability.push_back( (attr & XFlippable) != 0 ? 1 : 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(not cells.empty()){
|
|
|
|
|
std::vector<std::pair<int_t, int_t> > lims = get_cell_ranges(circuit, pl, cells); // Limit positions for each cell
|
|
|
|
|
|
|
|
|
|
Hnet_group nets = RSMT ?
|
|
|
|
|
get_RSMT_netgroup(circuit, pl, cells)
|
|
|
|
|
: get_B2B_netgroup(circuit, pl, cells);
|
|
|
|
|
|
|
|
|
|
std::vector<index_t> no_permutation(cells.size());
|
|
|
|
|
for(index_t i=0; i<cells.size(); ++i) no_permutation[i] = i;
|
|
|
|
|
|
|
|
|
|
std::vector<int_t> final_positions;
|
|
|
|
|
if(NON_CONVEX){
|
|
|
|
|
std::vector<int> flipped;
|
|
|
|
|
optimize_noncvx_sequence(nets, no_permutation, final_positions, flipped, flippability, lims);
|
|
|
|
|
for(index_t i=0; i<cells.size(); ++i){
|
2015-07-27 08:36:50 -05:00
|
|
|
bool old_orient = pl.plt_.orientations_[cells[i]].x;
|
|
|
|
|
pl.plt_.orientations_[cells[i]].x = flipped[i] ? not old_orient : old_orient;
|
2015-04-08 03:45:11 -05:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else{
|
|
|
|
|
optimize_convex_sequence(nets, no_permutation, final_positions, lims);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// Update the positions and orientations
|
|
|
|
|
for(index_t i=0; i<cells.size(); ++i){
|
2015-07-27 08:36:50 -05:00
|
|
|
pl.plt_.positions_[cells[i]].x = final_positions[i];
|
2015-04-08 03:45:11 -05:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
} // Iteration on the rows
|
|
|
|
|
|
|
|
|
|
pl.selfcheck();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
template<bool NON_CONVEX, bool RSMT>
|
|
|
|
|
void swaps_row_generic(netlist const & circuit, detailed_placement & pl, index_t range){
|
|
|
|
|
assert(range >= 2);
|
|
|
|
|
|
|
|
|
|
for(index_t r=0; r<pl.row_cnt(); ++r){
|
|
|
|
|
index_t OSRP_cell = pl.get_first_cell_on_row(r);
|
|
|
|
|
|
|
|
|
|
while(OSRP_cell != null_ind){
|
|
|
|
|
std::vector<index_t> cells;
|
|
|
|
|
std::vector<std::pair<int_t, int_t> > lims;
|
|
|
|
|
std::vector<int> flippables;
|
|
|
|
|
|
|
|
|
|
for(index_t nbr_cells=0;
|
|
|
|
|
OSRP_cell != null_ind
|
|
|
|
|
and nbr_cells < range;
|
|
|
|
|
OSRP_cell = pl.get_next_cell_on_row(OSRP_cell, r), ++nbr_cells
|
|
|
|
|
){
|
|
|
|
|
cells.push_back(OSRP_cell);
|
|
|
|
|
flippables.push_back( (circuit.get_cell(OSRP_cell).attributes & XFlippable) != 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(not cells.empty()){
|
|
|
|
|
std::vector<std::pair<int_t, int_t> > lims = get_cell_ranges(circuit, pl, cells); // Limit positions for each cell
|
|
|
|
|
|
|
|
|
|
Hnet_group nets = RSMT ?
|
|
|
|
|
get_RSMT_netgroup(circuit, pl, cells)
|
|
|
|
|
: get_B2B_netgroup(circuit, pl, cells);
|
|
|
|
|
|
|
|
|
|
std::int64_t best_cost = std::numeric_limits<std::int64_t>::max();
|
|
|
|
|
std::vector<int_t> positions(cells.size());
|
|
|
|
|
std::vector<int> flippings(cells.size());
|
|
|
|
|
std::vector<int_t> best_positions(cells.size());
|
|
|
|
|
std::vector<int> best_flippings(cells.size());
|
|
|
|
|
|
|
|
|
|
std::vector<index_t> permutation(cells.size());
|
|
|
|
|
for(index_t i=0; i<cells.size(); ++i) permutation[i] = i;
|
|
|
|
|
std::vector<index_t> best_permutation;
|
|
|
|
|
|
|
|
|
|
// Check every possible permutation of the cells
|
|
|
|
|
do{
|
|
|
|
|
std::int64_t cur_cost = NON_CONVEX ?
|
|
|
|
|
optimize_noncvx_sequence(nets, permutation, positions, flippings, flippables, lims) :
|
|
|
|
|
optimize_convex_sequence(nets, permutation, positions, lims);
|
|
|
|
|
if(cur_cost <= best_cost){
|
|
|
|
|
best_cost = cur_cost;
|
|
|
|
|
best_permutation = permutation;
|
|
|
|
|
best_flippings = flippings;
|
|
|
|
|
best_positions = positions;
|
|
|
|
|
}
|
|
|
|
|
}while(std::next_permutation(permutation.begin(), permutation.end()));
|
|
|
|
|
|
|
|
|
|
std::vector<index_t> new_cell_order(cells.size());
|
|
|
|
|
// Update the positions and the topology
|
|
|
|
|
for(index_t i=0; i<cells.size(); ++i){
|
|
|
|
|
index_t r_ind = best_permutation[i]; // In the row from in the Hnet_group
|
|
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new_cell_order[r_ind] = cells[i];
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2015-07-27 08:36:50 -05:00
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pl.plt_.positions_[cells[i]].x = best_positions[r_ind];
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2015-04-08 03:45:11 -05:00
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if(NON_CONVEX){
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2015-07-27 08:36:50 -05:00
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bool old_orient = pl.plt_.orientations_[cells[i]].x;
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pl.plt_.orientations_[cells[i]].x = best_flippings[r_ind] ? not old_orient : old_orient;
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2015-04-08 03:45:11 -05:00
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}
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}
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pl.reorder_cells(cells, new_cell_order, r);
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cells = new_cell_order;
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assert(best_cost < std::numeric_limits<std::int64_t>::max());
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}
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if(OSRP_cell != null_ind){
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assert(cells.size() == range);
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OSRP_cell = cells[range/2];
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}
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} // Iteration on the entire row
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} // Iteration on the rows
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pl.selfcheck();
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}
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} // End anonymous namespace
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void OSRP_convex_HPWL(netlist const & circuit, detailed_placement & pl){ OSRP_generic< false, false>(circuit, pl); }
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void OSRP_convex_RSMT(netlist const & circuit, detailed_placement & pl){ OSRP_generic< false, true >(circuit, pl); }
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void OSRP_noncvx_HPWL(netlist const & circuit, detailed_placement & pl){ OSRP_generic< true , false>(circuit, pl); }
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void OSRP_noncvx_RSMT(netlist const & circuit, detailed_placement & pl){ OSRP_generic< true , true >(circuit, pl); }
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void swaps_row_convex_HPWL(netlist const & circuit, detailed_placement & pl, index_t range){ swaps_row_generic< false, false>(circuit, pl, range); }
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void swaps_row_convex_RSMT(netlist const & circuit, detailed_placement & pl, index_t range){ swaps_row_generic< false, true >(circuit, pl, range); }
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void swaps_row_noncvx_HPWL(netlist const & circuit, detailed_placement & pl, index_t range){ swaps_row_generic< true , false>(circuit, pl, range); }
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void swaps_row_noncvx_RSMT(netlist const & circuit, detailed_placement & pl, index_t range){ swaps_row_generic< true , true >(circuit, pl, range); }
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} // namespace dp
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} // namespace coloquinte
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