1 /* 2 * Copyright 1998 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 */ 23 24 /* @test 25 @bug 4096278 26 @summary Math.abs(+0.0) wrong 27 @author Anand Palaniswamy 28 */ 29 public class AbsPositiveZero { 30 private static boolean isPositiveZero(float f) { 31 return Float.floatToIntBits(f) == Float.floatToIntBits(0.0f); 32 } 33 34 private static boolean isPositiveZero(double d) { 35 return Double.doubleToLongBits(d) == Double.doubleToLongBits(0.0d); 36 } 37 38 public static void main(String[] args) throws Exception { 39 if (!isPositiveZero(Math.abs(-0.0d))) { 40 throw new Exception("abs(-0.0d) failed"); 41 } 42 if (!isPositiveZero(Math.abs(+0.0d))) { 43 throw new Exception("abs(+0.0d) failed"); 44 } 45 if (Math.abs(Double.POSITIVE_INFINITY) != Double.POSITIVE_INFINITY) { 46 throw new Exception("abs(+Inf) failed"); 47 } 48 if (Math.abs(Double.NEGATIVE_INFINITY) != Double.POSITIVE_INFINITY) { 49 throw new Exception("abs(-Inf) failed"); 50 } 51 double dnanval = Math.abs(Double.NaN); 52 if (dnanval == dnanval) { 53 throw new Exception("abs(NaN) failed"); 54 } 55 56 if (!isPositiveZero(Math.abs(-0.0f))) { 57 throw new Exception("abs(-0.0f) failed"); 58 } 59 if (!isPositiveZero(Math.abs(+0.0f))) { 60 throw new Exception("abs(+0.0f) failed"); 61 } 62 if (Math.abs(Float.POSITIVE_INFINITY) != Float.POSITIVE_INFINITY) { 63 throw new Exception("abs(+Inf) failed"); 64 } 65 if (Math.abs(Float.NEGATIVE_INFINITY) != Float.POSITIVE_INFINITY) { 66 throw new Exception("abs(-Inf) failed"); 67 } 68 float fnanval = Math.abs(Float.NaN); 69 if (fnanval == fnanval) { 70 throw new Exception("abs(NaN) failed"); 71 } 72 } 73 }