1 /*
   2  * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /**
  25  * @test
  26  * @requires (vm.arch == "x64" | vm.arch == "sparcv9" | vm.arch == "arm64")
  27  * @library ../../../../../
  28  * @modules jdk.vm.ci/jdk.vm.ci.meta
  29  *          jdk.vm.ci/jdk.vm.ci.runtime
  30  *          java.base/jdk.internal.misc
  31  * @build jdk.vm.ci.runtime.test.ConstantTest
  32  * @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI jdk.vm.ci.runtime.test.ConstantTest
  33  */
  34 // * @compile ConstantTest.java FieldUniverse.java TypeUniverse.java TestMetaAccessProvider.java
  35 package jdk.vm.ci.runtime.test;
  36 
  37 import org.junit.Assert;
  38 import org.junit.Test;
  39 
  40 import jdk.vm.ci.meta.JavaConstant;
  41 
  42 public class ConstantTest extends FieldUniverse {
  43 
  44     @Test
  45     public void testNegativeZero() {
  46         Assert.assertTrue("Constant for 0.0f must be different from -0.0f", JavaConstant.FLOAT_0 != JavaConstant.forFloat(-0.0F));
  47         Assert.assertTrue("Constant for 0.0d must be different from -0.0d", JavaConstant.DOUBLE_0 != JavaConstant.forDouble(-0.0d));
  48     }
  49 
  50     @Test
  51     public void testNullIsNull() {
  52         Assert.assertTrue(JavaConstant.NULL_POINTER.isNull());
  53     }
  54 }