1 /*
   2  * Copyright (c) 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 package org.graalvm.compiler.nodes.test;
  24 
  25 import java.util.ArrayList;
  26 import java.util.Collection;
  27 import java.util.List;
  28 
  29 import org.junit.Assert;
  30 import org.junit.Test;
  31 import org.junit.runner.RunWith;
  32 import org.junit.runners.Parameterized;
  33 import org.junit.runners.Parameterized.Parameter;
  34 import org.junit.runners.Parameterized.Parameters;
  35 
  36 import org.graalvm.compiler.core.common.type.FloatStamp;
  37 import org.graalvm.compiler.core.common.type.IntegerStamp;
  38 import org.graalvm.compiler.core.common.type.StampPair;
  39 import org.graalvm.compiler.nodes.ParameterNode;
  40 import org.graalvm.compiler.nodes.calc.ReinterpretNode;
  41 
  42 import jdk.vm.ci.meta.JavaKind;
  43 
  44 @RunWith(Parameterized.class)
  45 public class ReinterpretStampDoubleToLongTest extends ReinterpretStampTest {
  46 
  47     @Parameters(name = "{0}")
  48     public static Collection<Object[]> data() {
  49         List<Object[]> ret = new ArrayList<>();
  50 
  51         for (long x : interestingLongs) {
  52             double lowerBound = Double.longBitsToDouble(x);
  53             if (Double.isNaN(lowerBound)) {
  54                 continue;
  55             }
  56 
  57             for (long y : interestingLongs) {
  58                 double upperBound = Double.longBitsToDouble(y);
  59                 if (Double.isNaN(upperBound)) {
  60                     continue;
  61                 }
  62 
  63                 if (Double.compare(lowerBound, upperBound) <= 0) {
  64                     ret.add(new Object[]{new FloatStamp(Double.SIZE, lowerBound, upperBound, true)});
  65                     ret.add(new Object[]{new FloatStamp(Double.SIZE, lowerBound, upperBound, false)});
  66                 }
  67             }
  68         }
  69 
  70         ret.add(new Object[]{new FloatStamp(Double.SIZE, Double.NaN, Double.NaN, false)});
  71 
  72         return ret;
  73     }
  74 
  75     @Parameter(value = 0) public FloatStamp inputStamp;
  76 
  77     @Test
  78     public void run() {
  79         ParameterNode param = new ParameterNode(0, StampPair.createSingle(inputStamp));
  80         ReinterpretNode reinterpret = new ReinterpretNode(JavaKind.Long, param);
  81 
  82         IntegerStamp resultStamp = (IntegerStamp) reinterpret.stamp();
  83         Assert.assertEquals(Long.SIZE, resultStamp.getBits());
  84 
  85         for (long result : interestingLongs) {
  86             double input = Double.longBitsToDouble(result);
  87 
  88             if (inputStamp.contains(input) && !resultStamp.contains(result)) {
  89                 Assert.fail(String.format("value %f (0x%x) is in input stamp, but not in result stamp (%s)", input, result, resultStamp));
  90             }
  91         }
  92     }
  93 }