diff options
Diffstat (limited to 'common/place_common.cc')
| -rw-r--r-- | common/place_common.cc | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/common/place_common.cc b/common/place_common.cc index 5cdb96ef..da8ab37d 100644 --- a/common/place_common.cc +++ b/common/place_common.cc @@ -237,6 +237,12 @@ class ConstraintLegaliseWorker return false; } } + // Don't place at tiles where any strongly bound Bels exist, as we might need to rip them up later + for (auto tilebel : ctx->getBelsByTile(loc.x, loc.y)) { + CellInfo *tcell = ctx->getBoundBelCell(tilebel); + if (tcell && tcell->belStrength >= STRENGTH_STRONG) + return false; + } usedLocations.insert(loc); for (auto child : cell->constr_children) { IncreasingDiameterSearch xSearch, ySearch, zSearch; @@ -329,7 +335,8 @@ class ConstraintLegaliseWorker yRootSearch = IncreasingDiameterSearch(cell->constr_y); if (cell->constr_z == cell->UNCONSTR) - zRootSearch = IncreasingDiameterSearch(currentLoc.z, 0, ctx->getTileBelDimZ(currentLoc.x, currentLoc.y)); + zRootSearch = + IncreasingDiameterSearch(currentLoc.z, 0, ctx->getTileBelDimZ(currentLoc.x, currentLoc.y)); else zRootSearch = IncreasingDiameterSearch(cell->constr_z); while (!xRootSearch.done()) { |