/*
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html.
 *
 * This file is a derivative of code released under the terms listed below.
 *
 */
/*
 *
 * Copyright (c) 2009-2012,
 *
 *  Adam Fuchs          <afuchs@cs.umd.edu>
 *  Avik Chaudhuri      <avik@cs.umd.edu>
 *  Steve Suh           <suhsteve@gmail.com>
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. The names of the contributors may not be used to endorse or promote
 * products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 *
 */

package com.ibm.wala.dalvik.dex.instructions;

import com.ibm.wala.dalvik.classLoader.DexIMethod;
import com.ibm.wala.shrikeBT.IUnaryOpInstruction;
import com.ibm.wala.shrikeBT.IUnaryOpInstruction.IOperator;
import com.ibm.wala.util.debug.Assertions;
import org.jf.dexlib2.Opcode;

public class UnaryOperation extends Instruction {

  public enum OpID {
    MOVE,
    MOVE_WIDE,
    MOVE_EXCEPTION,
    NOT,
    NEGINT,
    NOTINT,
    NEGLONG,
    NOTLONG,
    NEGFLOAT,
    NEGDOUBLE,
    DOUBLETOLONG,
    DOUBLETOFLOAT,
    INTTOBYTE,
    INTTOCHAR,
    INTTOSHORT,
    DOUBLETOINT,
    FLOATTODOUBLE,
    FLOATTOLONG,
    FLOATTOINT,
    LONGTODOUBLE,
    LONGTOFLOAT,
    LONGTOINT,
    INTTODOUBLE,
    INTTOFLOAT,
    INTTOLONG
  }

  /** for unary ops not defined in JVML */
  public enum DalvikUnaryOp implements IUnaryOpInstruction.IOperator {
    BITNOT;

    @Override
    public String toString() {
      return super.toString().toLowerCase();
    }
  }

  public final OpID op;
  public final int source;
  public final int destination;

  public UnaryOperation(
      int pc, OpID op, int destination, int source, Opcode opcode, DexIMethod method) {
    super(pc, opcode, method);
    this.op = op;
    this.destination = destination;
    this.source = source;
  }

  @Override
  public void visit(Visitor visitor) {
    visitor.visitUnaryOperation(this);
  }

  public boolean isConversion() {
    switch (op) {
      case DOUBLETOLONG:
      case DOUBLETOFLOAT:
      case INTTOBYTE:
      case INTTOCHAR:
      case INTTOSHORT:
      case DOUBLETOINT:
      case FLOATTODOUBLE:
      case FLOATTOLONG:
      case FLOATTOINT:
      case LONGTODOUBLE:
      case LONGTOFLOAT:
      case LONGTOINT:
      case INTTODOUBLE:
      case INTTOFLOAT:
      case INTTOLONG:
        return true;
      default:
        return false;
    }
  }

  public boolean isMove() {
    switch (op) {
      case MOVE:
      case MOVE_WIDE:
        return true;
      default:
        return false;
    }
  }

  public IOperator getOperator() {
    switch (op) {
        // SSA unary ops
      case NOT:
      case NOTLONG:
      case NOTINT:
        return DalvikUnaryOp.BITNOT;
      case NEGINT:
      case NEGDOUBLE:
      case NEGFLOAT:
      case NEGLONG:
        return IUnaryOpInstruction.Operator.NEG;
      default:
        Assertions.UNREACHABLE();
        return null;
    }
  }
}
