1 /*
   2  * Copyright (c) 2018, 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 import java.lang.Float;
  25 import java.lang.RuntimeException;
  26 
  27 /*
  28  * @test Test8215902.java
  29  * @bug 8215902
  30  * @summary Check a known imprecision in Linux ARM softfp implementation.
  31  * @run main Test8215902
  32  * @author jakvanek
  33  */
  34 public strictfp class Test8215902 {
  35     private static volatile Float a, b, c;
  36     private static volatile int bC;
  37 
  38     private static final int bA = 0x003fffff;
  39     private static final int bB = 0x00000001;
  40     private static final int bC_OK = 0x00400000;
  41 
  42     public static void main(String... args) {
  43         a = Float.intBitsToFloat(bA);
  44         b = Float.intBitsToFloat(bB);
  45         c = a + b;
  46         bC = Float.floatToRawIntBits(c);
  47 
  48         if (bC == bC_OK) {
  49             System.out.println("Passed.");
  50         } else {
  51             String msg = String.format("Failed.\nResult = 0x%08x|%1.60f\nExpected = 0x%08x|%1.60f",
  52                                        bC, c, bC_OK, Float.intBitsToFloat(bC_OK));
  53             throw new RuntimeException(msg);
  54         }
  55     }
  56 }
  57