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router2: special case improvement

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2019-12-10 11:31:08 +00:00
parent a1c703729c
commit 3b6d9c952a
1 changed files with 1 additions and 1 deletions
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2
common/router2.cc
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@ -434,7 +434,7 @@ struct Router2
// This could also be used to speed up forwards routing by a hybrid // This could also be used to speed up forwards routing by a hybrid
// bidirectional approach // bidirectional approach
int backwards_iter = 0; int backwards_iter = 0;
int backwards_limit = 10; int backwards_limit = ctx->getBelGlobalBuf(net->driver.cell->bel) ? 20000 : 15;
t.backwards_pip.clear(); t.backwards_pip.clear();
t.backwards_queue.push(dst_wire); t.backwards_queue.push(dst_wire);
while (!t.backwards_queue.empty() && backwards_iter < backwards_limit) { while (!t.backwards_queue.empty() && backwards_iter < backwards_limit) {