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router2: Add IPIN cost to model

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2019-11-18 15:23:47 +00:00
parent a8351b265f
commit 010e7ba8cb
1 changed files with 3 additions and 1 deletions
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4
common/router2.cc
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@ -300,7 +300,9 @@ struct Router2
if (wd.bound_nets.count(net->udata))
source_uses = wd.bound_nets.at(net->udata).first;
// FIXME: timing/wirelength balance?
return ctx->getDelayNS(ctx->estimateDelay(wire, sink)) / (1 + source_uses);
float ipin_cost = ctx->getDelayNS(ctx->getWireDelay(sink).maxDelay() + ctx->getDelayEpsilon());
return std::max(0.0f, ctx->getDelayNS(ctx->estimateDelay(wire, sink)) - ipin_cost) / (1 + source_uses) +
ipin_cost;
}
bool check_arc_routing(NetInfo *net, size_t usr)