/*

 * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.tools.tree;

import sun.tools.java.*;

import sun.tools.asm.Assembler;

/**

 * WARNING: The contents of this source file are not part of any

 * supported API.  Code that depends on them does so at its own risk:

 * they are subject to change or removal without notice.

 */

public

class UnsignedShiftRightExpression extends BinaryShiftExpression {

    /**

     * constructor

     */

    public UnsignedShiftRightExpression(long where, Expression left, Expression right) {

        super(URSHIFT, where, left, right);

    }

    /**

     * Evaluate

     */

    Expression eval(int a, int b) {

        return new IntExpression(where, a >>> b);

    }

    Expression eval(long a, long b) {

        return new LongExpression(where, a >>> b);

    }

    /**

     * Simplify

     */

    Expression simplify() {

        if (right.equals(0)) {

            return left;

        }

        if (left.equals(0)) {

            return new CommaExpression(where, right, left).simplify();

        }

        return this;

    }

    /**

     * Code

     */

    void codeOperation(Environment env, Context ctx, Assembler asm) {

        asm.add(where, opc_iushr + type.getTypeCodeOffset());

    }

}