src/java.base/share/classes/java/math/BigDecimal.java

*** 2202,2211 ****
--- 2202,2234 ----
                  if (this.subtract(result.multiply(result)).compareTo(ZERO) != 0) {
                      throw new ArithmeticException("Computed square root not exact.");
                  }
              } else {
                  result = approx.scaleByPowerOfTen(-scaleAdjust/2).round(mc);
+                 
+                 switch (targetRm) {
+                 case DOWN:
+                 case FLOOR:
+                     // Check if too big
+                     if (result.multiply(result).compareTo(this) > 0  ) {
+                         result = result.subtract(result.ulp());
+                     }
+                     break;
+ 
+                 case UP:
+                 case CEILING:
+                     // Check if too small
+                     if (result.multiply(result).compareTo(this) < 0  ) {
+                         result = result.add(result.ulp());
+                     }
+                     break;
+ 
+                 default:
+                     // Do nothing for half-way cases
+                     break;
+                 }
+ 
              }
  
              if (result.scale() != preferredScale) {
                  // The preferred scale of an add is
                  // max(addend.scale(), augend.scale()). Therefore, if