/*

 * 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

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 */

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 BitNotExpression extends UnaryExpression {

    /**

     * Constructor

     */

    public BitNotExpression(long where, Expression right) {

        super(BITNOT, where, right.type, right);

    }

    /**

     * Select the type of the expression

     */

    void selectType(Environment env, Context ctx, int tm) {

        if ((tm & TM_LONG) != 0) {

            type = Type.tLong;

        } else {

            type = Type.tInt;

        }

        right = convert(env, ctx, type, right);

    }

    /**

     * Evaluate

     */

    Expression eval(int a) {

        return new IntExpression(where, ~a);

    }

    Expression eval(long a) {

        return new LongExpression(where, ~a);

    }

    /**

     * Simplify

     */

    Expression simplify() {

        if (right.op == BITNOT) {

            return ((BitNotExpression)right).right;

        }

        return this;

    }

    /**

     * Code

     */

    public void codeValue(Environment env, Context ctx, Assembler asm) {

        right.codeValue(env, ctx, asm);

        if (type.isType(TC_INT)) {

            asm.add(where, opc_ldc, -1);

            asm.add(where, opc_ixor);

        } else {

            asm.add(where, opc_ldc2_w, -1L);

            asm.add(where, opc_lxor);

        }

    }

}