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

router2: reduce bias cost factor

Browse Source 
Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2019-12-10 12:45:38 +00:00
parent 3b6d9c952a
commit 900fe98f0d
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
common/router2.cc
View File

@ -304,7 +304,7 @@ struct Router2
source_uses = wd.bound_nets.at(net->udata).first; source_uses = wd.bound_nets.at(net->udata).first;
if (pip != PipId()) { if (pip != PipId()) {
Loc pl = ctx->getPipLocation(pip); Loc pl = ctx->getPipLocation(pip);
bias_cost = 0.5f * (base_cost / int(net->users.size())) * bias_cost = 0.25f * (base_cost / int(net->users.size())) *
((std::abs(pl.x - nd.cx) + std::abs(pl.y - nd.cy)) / float(nd.hpwl)); ((std::abs(pl.x - nd.cx) + std::abs(pl.y - nd.cy)) / float(nd.hpwl));
} }
return base_cost * hist_cost * present_cost / (1 + source_uses) + bias_cost; return base_cost * hist_cost * present_cost / (1 + source_uses) + bias_cost;