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Experimenting with more unplacing

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-06-15 10:14:12 +02:00
parent 104c2dad9b
commit 32dcf6b3fe
1 changed files with 11 additions and 6 deletions
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17
common/place.cc
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@ -148,14 +148,15 @@ static void place_cell(Design *design, CellInfo *cell, std::mt19937 &rnd)
const PortInfo &pi = port.second;
if (pi.net != nullptr) {
CellInfo *drv = pi.net->driver.cell;
float pin_wirelength = std::numeric_limits<float>::infinity();
//float pin_wirelength = std::numeric_limits<float>::infinity();
float pin_wirelength = 0;
if (drv != nullptr && drv->bel != BelId()) {
float otherx, othery;
chip.estimatePosition(drv->bel, otherx, othery);
float local_wl = std::abs(belx - otherx) +
std::abs(bely - othery);
if (local_wl < pin_wirelength)
pin_wirelength = local_wl;
//if (local_wl < pin_wirelength)
pin_wirelength += local_wl;
has_conns = true;
}
if (pi.net->users.size() < 5) {
@ -166,8 +167,8 @@ static void place_cell(Design *design, CellInfo *cell, std::mt19937 &rnd)
chip.estimatePosition(uc->bel, otherx, othery);
float local_wl = std::abs(belx - otherx) +
std::abs(bely - othery);
if (local_wl < pin_wirelength)
pin_wirelength = local_wl;
//if (local_wl < pin_wirelength)
pin_wirelength += local_wl;
has_conns = true;
}
}
@ -238,8 +239,12 @@ void place_design_heuristic(Design *design)
}
log_info("placed %d/%d\n", placed_cells, total_cells);
}
for (int i = 0 ; i < 2; i ++) {
for (int i = 0 ; i < 5; i ++) {
int replaced_cells = 0;
for (int j = 0; j < autoplaced.size() / 10; j++) {
design->chip.unbindBel(design->cells.at(autoplaced.at(j))->bel);
design->cells.at(autoplaced.at(j))->bel = BelId();
}
std::shuffle(autoplaced.begin(), autoplaced.end(), rnd);
for (auto cell : autoplaced) {
CellInfo *ci = design->cells[cell];