router2: special case improvement
Signed-off-by: David Shah <dave@ds0.me>
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@ -434,7 +434,7 @@ struct Router2
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// This could also be used to speed up forwards routing by a hybrid
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// bidirectional approach
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int backwards_iter = 0;
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int backwards_limit = 10;
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int backwards_limit = ctx->getBelGlobalBuf(net->driver.cell->bel) ? 20000 : 15;
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t.backwards_pip.clear();
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t.backwards_queue.push(dst_wire);
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while (!t.backwards_queue.empty() && backwards_iter < backwards_limit) {
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