test/micro/org/openjdk/bench/java/math/BigIntegers.java

@@ -135,6 +135,40 @@
             }
             tmp = tmp.add(s);
         }
         bh.consume(tmp);
     }
+
+    /** Invokes the shiftLeft method of BigInteger with different values. */
+    @Benchmark
+    @OperationsPerInvocation(TESTSIZE)
+    public void testLeftShift(Blackhole bh) {
+        Random rand = new Random();
+        int shift = rand.nextInt(30) + 1;
+        BigInteger tmp = null;
+        for (BigInteger s : hugeArray) {
+            if (tmp == null) {
+                tmp = s;
+                continue;
+            }
+            tmp = tmp.shiftLeft(shift);
+        }
+        bh.consume(tmp);
+    }
+
+    /** Invokes the shiftRight method of BigInteger with different values. */
+    @Benchmark
+    @OperationsPerInvocation(TESTSIZE)
+    public void testRightShift(Blackhole bh) {
+        Random rand = new Random();
+        int shift = rand.nextInt(30) + 1;
+        BigInteger tmp = null;
+        for (BigInteger s : hugeArray) {
+            if (tmp == null) {
+                tmp = s;
+                continue;
+            }
+            tmp = tmp.shiftRight(shift);
+        }
+        bh.consume(tmp);
+    }
 }