1 /*
   2  * Copyright 1997 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 4010528 4010529
  26    @summary Math.min and Math.max should treat negative zero as strictly
  27             less than positive zero
  28  */
  29 
  30 
  31 public class MinMax {
  32 
  33 
  34     static void go(String what, float result, float correctResult) {
  35         String v = what + ": got " + result + ", expected " + correctResult;
  36         if (!(Float.toString(result).equals(Float.toString(correctResult))))
  37             throw new RuntimeException(v);
  38         System.err.println(v);
  39     }
  40 
  41     static void go(String what, double result, double correctResult) {
  42         String v = what + ": got " + result + ", expected " + correctResult;
  43         if (!(Double.toString(result).equals(Double.toString(correctResult))))
  44             throw new RuntimeException(v);
  45         System.err.println(v);
  46     }
  47 
  48 
  49     public static void main(String[] args) {
  50 
  51         float fnz = -0.0f;
  52         float fpz = +0.0f;
  53 
  54         go("Math.min(fnz, fnz)", Math.min(fnz, fnz), fnz);
  55         go("Math.min(fnz, fpz)", Math.min(fnz, fpz), fnz);
  56         go("Math.min(fpz, fnz)", Math.min(fpz, fnz), fnz);
  57         go("Math.min(fpz, fpz)", Math.min(fpz, fpz), fpz);
  58 
  59         go("Math.min(-1.0f, fnz)", Math.min(-1.0f, fnz), -1.0f);
  60         go("Math.min(-1.0f, fpz)", Math.min(-1.0f, fpz), -1.0f);
  61         go("Math.min(+1.0f, fnz)", Math.min(+1.0f, fnz), fnz);
  62         go("Math.min(+1.0f, fpz)", Math.min(+1.0f, fpz), fpz);
  63         go("Math.min(-1.0f, +1.0f)", Math.min(-1.0f, +1.0f), -1.0f);
  64         go("Math.min(fnz, -1.0f)", Math.min(fnz, -1.0f), -1.0f);
  65         go("Math.min(fpz, -1.0f)", Math.min(fpz, -1.0f), -1.0f);
  66         go("Math.min(fnz, +1.0f)", Math.min(fnz, +1.0f), fnz);
  67         go("Math.min(fpz, +1.0f)", Math.min(fpz, +1.0f), fpz);
  68         go("Math.min(+1.0f, -1.0f)", Math.min(+1.0f, -1.0f), -1.0f);
  69 
  70         go("Math.max(fnz, fnz)", Math.max(fnz, fnz), fnz);
  71         go("Math.max(fnz, fpz)", Math.max(fnz, fpz), fpz);
  72         go("Math.max(fpz, fnz)", Math.max(fpz, fnz), fpz);
  73         go("Math.max(fpz, fpz)", Math.max(fpz, fpz), fpz);
  74 
  75         go("Math.max(-1.0f, fnz)", Math.max(-1.0f, fnz), fnz);
  76         go("Math.max(-1.0f, fpz)", Math.max(-1.0f, fpz), fpz);
  77         go("Math.max(+1.0f, fnz)", Math.max(+1.0f, fnz), +1.0f);
  78         go("Math.max(+1.0f, fpz)", Math.max(+1.0f, fpz), +1.0f);
  79         go("Math.max(-1.0f, +1.0f)", Math.max(-1.0f, +1.0f), +1.0f);
  80         go("Math.max(fnz, -1.0f)", Math.max(fnz, -1.0f), fnz);
  81         go("Math.max(fpz, -1.0f)", Math.max(fpz, -1.0f), fpz);
  82         go("Math.max(fnz, +1.0f)", Math.max(fnz, +1.0f), +1.0f);
  83         go("Math.max(fpz, +1.0f)", Math.max(fpz, +1.0f), +1.0f);
  84         go("Math.max(+1.0f, -1.0f)", Math.max(+1.0f, -1.0f), +1.0f);
  85 
  86 
  87         double dnz = -0.0d;
  88         double dpz = +0.0d;
  89 
  90         go("Math.min(dnz, dnz)", Math.min(dnz, dnz), dnz);
  91         go("Math.min(dnz, dpz)", Math.min(dnz, dpz), dnz);
  92         go("Math.min(dpz, dnz)", Math.min(dpz, dnz), dnz);
  93         go("Math.min(dpz, dpz)", Math.min(dpz, dpz), dpz);
  94 
  95         go("Math.min(-1.0d, dnz)", Math.min(-1.0d, dnz), -1.0d);
  96         go("Math.min(-1.0d, dpz)", Math.min(-1.0d, dpz), -1.0d);
  97         go("Math.min(+1.0d, dnz)", Math.min(+1.0d, dnz), dnz);
  98         go("Math.min(+1.0d, dpz)", Math.min(+1.0d, dpz), dpz);
  99         go("Math.min(-1.0d, +1.0d)", Math.min(-1.0d, +1.0d), -1.0d);
 100         go("Math.min(dnz, -1.0d)", Math.min(dnz, -1.0d), -1.0d);
 101         go("Math.min(dpz, -1.0d)", Math.min(dpz, -1.0d), -1.0d);
 102         go("Math.min(dnz, +1.0d)", Math.min(dnz, +1.0d), dnz);
 103         go("Math.min(dpz, +1.0d)", Math.min(dpz, +1.0d), dpz);
 104         go("Math.min(+1.0d, -1.0d)", Math.min(+1.0d, -1.0d), -1.0d);
 105 
 106         go("Math.max(dnz, dnz)", Math.max(dnz, dnz), dnz);
 107         go("Math.max(dnz, dpz)", Math.max(dnz, dpz), dpz);
 108         go("Math.max(dpz, dnz)", Math.max(dpz, dnz), dpz);
 109         go("Math.max(dpz, dpz)", Math.max(dpz, dpz), dpz);
 110 
 111         go("Math.max(-1.0d, dnz)", Math.max(-1.0d, dnz), dnz);
 112         go("Math.max(-1.0d, dpz)", Math.max(-1.0d, dpz), dpz);
 113         go("Math.max(+1.0d, dnz)", Math.max(+1.0d, dnz), +1.0d);
 114         go("Math.max(+1.0d, dpz)", Math.max(+1.0d, dpz), +1.0d);
 115         go("Math.max(-1.0d, +1.0d)", Math.max(-1.0d, +1.0d), +1.0d);
 116         go("Math.max(dnz, -1.0d)", Math.max(dnz, -1.0d), dnz);
 117         go("Math.max(dpz, -1.0d)", Math.max(dpz, -1.0d), dpz);
 118         go("Math.max(dnz, +1.0d)", Math.max(dnz, +1.0d), +1.0d);
 119         go("Math.max(dpz, +1.0d)", Math.max(dpz, +1.0d), +1.0d);
 120         go("Math.max(+1.0d, -1.0d)", Math.max(+1.0d, -1.0d), +1.0d);
 121 
 122     }
 123 
 124 }