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	/*
	* 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 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, new Integer(-1));
	asm.add(where, opc_ixor);
	} else {
	asm.add(where, opc_ldc2_w, new Long(-1));
	asm.add(where, opc_lxor);
	}
	}
	}

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