github.com/YosysHQ.nextpnr
1
0
Fork 0
mirror of https://github.com/YosysHQ/nextpnr.git synced 2026-02-04 15:53:20 +00:00
Code Issues Releases Wiki Activity

Improving placement timing heuristic

Browse Source 
Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah
2018-06-20 17:54:07 +02:00
parent 4fc9625040
commit c515e5da2d
1 changed files with 4 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
common/place_sa.cc
View File

@@ -315,7 +315,10 @@ class SAPlacer
// wirelength += std::abs(load_x - driver_x) + std::abs(load_y -
// driver_y);
delay_t raw_wl = ctx->estimateDelay(drv_wire, user_wire);
wirelength += 100 * (ctx->getDelayNS(raw_wl) / ctx->getDelayNS(load.budget));
wirelength += pow(1.3, (ctx->getDelayNS(raw_wl) -
ctx->getDelayNS(load.budget)) /
10) +
ctx->getDelayNS(raw_wl);
// wirelength += pow(ctx->estimateDelay(drv_wire, user_wire), 2.0);
}
return wirelength;