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static: Lower start penalty 

Signed-off-by: gatecat <gatecat@ds0.me>
This commit is contained in:
gatecat 2026-05-11 13:17:44 +02:00
parent 36595c5486
commit 8b7dbbedd1
1 changed files with 3 additions and 3 deletions
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6
common/place/placer_static.cc
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@ -973,7 +973,7 @@ class StaticPlacer
wirelen_sum += std::abs(mc.ref_wl_grad.x) + std::abs(mc.ref_wl_grad.y);
force_sum += std::abs(mc.ref_dens_grad.x) + std::abs(mc.ref_dens_grad.y);
}
const float eta = 1e-1;
const float eta = 1e-3;
float init_dens_penalty = eta * (wirelen_sum / force_sum);
NPNR_ASSERT(std::isfinite(init_dens_penalty));
log_info("initial density penalty: %f\n", init_dens_penalty);
@ -1090,7 +1090,7 @@ class StaticPlacer
for (int g = 0; g < int(groups.size()); g++) {
if (!groups.at(g).enabled)
continue;
float next_penalty = dens_penalty.at(g) + (penalty_incr * (rel_pot.at(g) / pot_norm));
float next_penalty = dens_penalty.at(g) * (1 + (penalty_incr * (rel_pot.at(g) / pot_norm)));
dens_penalty.at(g) = next_penalty;
}
}
@ -1146,7 +1146,7 @@ class StaticPlacer
{
// Move the post-solve position of a chain towards be the weighted average of its constituents
// The strength increases with iterations
float alpha = std::min<float>(std::pow(1.002f, iter) - 1, 1.0f);
float alpha = std::min<float>(std::pow(1.0005f, iter) - 1, 1.0f);
float dist = 0;
for (int i = 0; i < int(macros.size()); i++) {
auto &macro = macros.at(i);