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.StampFactory;
  39 import org.graalvm.compiler.core.common.type.StampPair;
  40 import org.graalvm.compiler.nodes.ParameterNode;
  41 import org.graalvm.compiler.nodes.calc.ReinterpretNode;
  42 
  43 import jdk.vm.ci.meta.JavaKind;
  44 
  45 @RunWith(Parameterized.class)
  46 public class ReinterpretStampIntToFloatTest extends ReinterpretStampTest {
  47 
  48     @Parameters(name = "{0}")
  49     public static Collection<Object[]> data() {
  50         List<Object[]> ret = new ArrayList<>();
  51 
  52         for (int lowerBound : interestingInts) {
  53             for (int upperBound : interestingInts) {
  54                 if (lowerBound <= upperBound) {
  55                     ret.add(new Object[]{StampFactory.forInteger(JavaKind.Int, lowerBound, upperBound)});
  56                 }
  57                 if ((lowerBound & ~upperBound) == 0) {
  58                     ret.add(new Object[]{IntegerStamp.stampForMask(Integer.SIZE, lowerBound & 0xFFFF_FFFFL, upperBound & 0xFFFF_FFFFL)});
  59                 }
  60             }
  61         }
  62 
  63         return ret;
  64     }
  65 
  66     @Parameter(value = 0) public IntegerStamp inputStamp;
  67 
  68     @Test
  69     public void run() {
  70         ParameterNode param = new ParameterNode(0, StampPair.createSingle(inputStamp));
  71         ReinterpretNode reinterpret = new ReinterpretNode(JavaKind.Float, param);
  72         reinterpret.inferStamp();
  73 
  74         FloatStamp resultStamp = (FloatStamp) reinterpret.stamp();
  75         Assert.assertEquals(Float.SIZE, resultStamp.getBits());
  76 
  77         for (int input : interestingInts) {
  78             float result = Float.intBitsToFloat(input);
  79 
  80             if (inputStamp.contains(input) && !resultStamp.contains(result)) {
  81                 Assert.fail(String.format("value 0x%x (%f) is in input stamp, but not in result stamp (%s)", input, result, resultStamp));
  82             }
  83         }
  84     }
  85 }