1 /*
   2  * Copyright (c) 2011, 2015, 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.core.common.calc;
  24 
  25 //JaCoCo Exclude
  26 
  27 /**
  28  * Utilities for unsigned comparisons. All methods have correct, but slow, standard Java
  29  * implementations so that they can be used with compilers not supporting the intrinsics.
  30  */
  31 public class UnsignedMath {
  32 
  33     /**
  34      * Unsigned comparison aboveThan for two numbers.
  35      */
  36     public static boolean aboveThan(int a, int b) {
  37         return Integer.compareUnsigned(a, b) > 0;
  38     }
  39 
  40     /**
  41      * Unsigned comparison aboveOrEqual for two numbers.
  42      */
  43     public static boolean aboveOrEqual(int a, int b) {
  44         return Integer.compareUnsigned(a, b) >= 0;
  45     }
  46 
  47     /**
  48      * Unsigned comparison belowThan for two numbers.
  49      */
  50     public static boolean belowThan(int a, int b) {
  51         return Integer.compareUnsigned(a, b) < 0;
  52     }
  53 
  54     /**
  55      * Unsigned comparison belowOrEqual for two numbers.
  56      */
  57     public static boolean belowOrEqual(int a, int b) {
  58         return Integer.compareUnsigned(a, b) <= 0;
  59     }
  60 
  61     /**
  62      * Unsigned comparison aboveThan for two numbers.
  63      */
  64     public static boolean aboveThan(long a, long b) {
  65         return Long.compareUnsigned(a, b) > 0;
  66     }
  67 
  68     /**
  69      * Unsigned comparison aboveOrEqual for two numbers.
  70      */
  71     public static boolean aboveOrEqual(long a, long b) {
  72         return Long.compareUnsigned(a, b) >= 0;
  73     }
  74 
  75     /**
  76      * Unsigned comparison belowThan for two numbers.
  77      */
  78     public static boolean belowThan(long a, long b) {
  79         return Long.compareUnsigned(a, b) < 0;
  80     }
  81 
  82     /**
  83      * Unsigned comparison belowOrEqual for two numbers.
  84      */
  85     public static boolean belowOrEqual(long a, long b) {
  86         return Long.compareUnsigned(a, b) <= 0;
  87     }
  88 }