Added 'Bit shift left' and 'Bit shift right' operations

src/core/operations/BitwiseOp.js

@@ -228,6 +228,46 @@ const BitwiseOp = {
     },
 
 
+    /**
+     * Bit shift left operation.
+     *
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    runBitShiftLeft: function(input, args) {
+        const amount = args[0];
+
+        return input.map(b => {
+            return (b << amount) & 0xff;
+        });
+    },
+
+
+    /**
+     * @constant
+     * @default
+     */
+    BIT_SHIFT_TYPE: ["Logical shift", "Arithmetic shift"],
+
+    /**
+     * Bit shift right operation.
+     *
+     * @param {byteArray} input
+     * @param {Object[]} args
+     * @returns {byteArray}
+     */
+    runBitShiftRight: function(input, args) {
+        const amount = args[0],
+            type = args[1],
+            mask = type === "Logical shift" ? 0 : 0x80;
+
+        return input.map(b => {
+            return (b >>> amount) ^ (b & mask);
+        });
+    },
+
+
     /**
      * XOR bitwise calculation.
      *