Merge pull request #2759 from The-OpenROAD-Project-staging/gpl-index

gpl: ensure index in BinGrid::getDensityMinMaxIdx[XY] is valid

Author: maliberty

src/gpl/src/nesterovBase.cpp

@@ -921,6 +921,8 @@ std::pair<int, int> BinGrid::getDensityMinMaxIdxX(const GCell* gcell) const
   int upperIdx = (fastModulo((gcell->dUx() - lx()), binSizeX_) == 0)
                      ? (gcell->dUx() - lx()) / binSizeX_
                      : (gcell->dUx() - lx()) / binSizeX_ + 1;
+
+  upperIdx = std::min(upperIdx, binCntX_);
   return std::make_pair(lowerIdx, upperIdx);
 }
 
@@ -931,6 +933,7 @@ std::pair<int, int> BinGrid::getDensityMinMaxIdxY(const GCell* gcell) const
                      ? (gcell->dUy() - ly()) / binSizeY_
                      : (gcell->dUy() - ly()) / binSizeY_ + 1;
 
+  upperIdx = std::min(upperIdx, binCntY_);
   return std::make_pair(lowerIdx, upperIdx);
 }