--- old/src/java.base/share/classes/java/math/BigDecimal.java	2019-11-24 09:48:17.503122824 -0800
+++ new/src/java.base/share/classes/java/math/BigDecimal.java	2019-11-24 09:48:17.114928824 -0800
@@ -2204,6 +2204,39 @@
                 }
             } 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  ) {
+                        BigDecimal ulp = ulp = result.ulp();
+                        // Adjust increment down in case of 1.0 = 10^0
+                        // since the next smaller number is 1/10
+                        // closer than the next larger at exponent
+                        // boundaries.
+                        if (result.compareTo(ONE) == 0) {
+                            ulp = ulp.multiply(ONE_TENTH);
+                        }
+                        result = result.subtract(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
+                    // HALF_DOWN, HALF_EVEN, HALF_UP
+                    // See fix-up in paper, up down by *1/2* ulp
+                    break;
+                }
+
             }
 
             if (result.scale() != preferredScale) {