org.spf4j.zel.instr.LODXF Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of spf4j-zel Show documentation

The ZEL language, a simple language with concurency facilities, mathematical operations...

The newest version!

/*
 * Copyright (c) 2001-2017, Zoltan Farkas All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Additionally licensed with:
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.spf4j.zel.instr;

import org.spf4j.zel.vm.Address;
import org.spf4j.zel.vm.Address.Scope;
import org.spf4j.zel.vm.ExecutionContext;

public final class LODXF extends Instruction {

  private static final long serialVersionUID = 1L;

  private final Address fromAddr;

  public LODXF(final Address fromAddr) {
    this.fromAddr = fromAddr;
  }

  @Override
  public int execute(final ExecutionContext context) {
    Address adr = fromAddr;
    Object obj;
    if (adr.getScope() == Scope.LOCAL) {
      obj = context.localPeek(adr.getAddress());
    } else {
      obj = context.globalPeek(adr.getAddress());
    }
    context.push(obj);
    return 1;
  }

  @Override
  public Object[] getParameters() {
    return new Object[]{fromAddr};
  }
}