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comparison graal/com.oracle.max.cri/src/com/oracle/max/cri/util/UnsignedMath.java @ 4198:8c9c0e1eaab1

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More restructuring of cri; moved bytecodes ingo compiler.graphbuilder.* package
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Tue, 03 Jan 2012 16:24:22 +0100
parents graal/com.oracle.max.cri/src/com/oracle/max/cri/intrinsics/UnsignedMath.java@e233f5660da4
children 4d7175cf3526
comparison
equal deleted inserted replaced
4197:b765172082ac 4198:8c9c0e1eaab1
1 /*
2 * Copyright (c) 2011, 2011, 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 com.oracle.max.cri.util;
24
25 /**
26 * {@link INTRINSIC} method definitions for unsigned comparisons.
27 * All methods have correct, but slow, standard Java implementations so that
28 * they can be used with compilers not supporting the intrinsics.
29 */
30 public class UnsignedMath {
31 private static final long MASK = 0xffffffffL;
32
33 /**
34 * Unsigned comparison aboveThan for two numbers.
35 */
36 public static boolean aboveThan(int a, int b) {
37 return (a & MASK) > (b & MASK);
38 }
39
40 /**
41 * Unsigned comparison aboveOrEqual for two numbers.
42 */
43 public static boolean aboveOrEqual(int a, int b) {
44 return (a & MASK) >= (b & MASK);
45 }
46
47 /**
48 * Unsigned comparison belowThan for two numbers.
49 */
50 public static boolean belowThan(int a, int b) {
51 return (a & MASK) < (b & MASK);
52 }
53
54 /**
55 * Unsigned comparison belowOrEqual for two numbers.
56 */
57 public static boolean belowOrEqual(int a, int b) {
58 return (a & MASK) <= (b & MASK);
59 }
60
61 /**
62 * Unsigned comparison aboveThan for two numbers.
63 */
64 public static boolean aboveThan(long a, long b) {
65 return (a > b) ^ ((a < 0) != (b < 0));
66 }
67
68 /**
69 * Unsigned comparison aboveOrEqual for two numbers.
70 */
71 public static boolean aboveOrEqual(long a, long b) {
72 return (a >= b) ^ ((a < 0) != (b < 0));
73 }
74
75 /**
76 * Unsigned comparison belowThan for two numbers.
77 */
78 public static boolean belowThan(long a, long b) {
79 return (a < b) ^ ((a < 0) != (b < 0));
80 }
81
82 /**
83 * Unsigned comparison belowOrEqual for two numbers.
84 */
85 public static boolean belowOrEqual(long a, long b) {
86 return (a <= b) ^ ((a < 0) != (b < 0));
87 }
88 }
89