Mercurial > hg > truffle
comparison graal/com.oracle.max.cri/src/com/oracle/max/cri/intrinsics/UnsignedMath.java @ 3733:e233f5660da4
Added Java files from Maxine project.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 19:59:18 +0100 |
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3732:3e2e8b8abdaf | 3733:e233f5660da4 |
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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.intrinsics; | |
24 | |
25 import static com.oracle.max.cri.intrinsics.IntrinsicIDs.*; | |
26 | |
27 import java.math.*; | |
28 | |
29 import com.sun.max.annotate.*; | |
30 | |
31 /** | |
32 * {@link INTRINSIC} method definitions for unsigned comparisons. | |
33 * All methods have correct, but slow, standard Java implementations so that | |
34 * they can be used with compilers not supporting the intrinsics. | |
35 */ | |
36 public class UnsignedMath { | |
37 private static final long MASK = 0xffffffffL; | |
38 | |
39 /** | |
40 * @see IntrinsicIDs#UCMP_AT | |
41 */ | |
42 @INTRINSIC(UCMP_AT) | |
43 public static boolean aboveThan(int a, int b) { | |
44 return (a & MASK) > (b & MASK); | |
45 } | |
46 | |
47 /** | |
48 * @see IntrinsicIDs#UCMP_AE | |
49 */ | |
50 @INTRINSIC(UCMP_AE) | |
51 public static boolean aboveOrEqual(int a, int b) { | |
52 return (a & MASK) >= (b & MASK); | |
53 } | |
54 | |
55 /** | |
56 * @see IntrinsicIDs#UCMP_BT | |
57 */ | |
58 @INTRINSIC(UCMP_BT) | |
59 public static boolean belowThan(int a, int b) { | |
60 return (a & MASK) < (b & MASK); | |
61 } | |
62 | |
63 /** | |
64 * @see IntrinsicIDs#UCMP_BE | |
65 */ | |
66 @INTRINSIC(UCMP_BE) | |
67 public static boolean belowOrEqual(int a, int b) { | |
68 return (a & MASK) <= (b & MASK); | |
69 } | |
70 | |
71 | |
72 /** | |
73 * @see IntrinsicIDs#UCMP_AT | |
74 */ | |
75 @INTRINSIC(UCMP_AT) | |
76 public static boolean aboveThan(long a, long b) { | |
77 return (a > b) ^ ((a < 0) != (b < 0)); | |
78 } | |
79 | |
80 /** | |
81 * @see IntrinsicIDs#UCMP_AE | |
82 */ | |
83 @INTRINSIC(UCMP_AE) | |
84 public static boolean aboveOrEqual(long a, long b) { | |
85 return (a >= b) ^ ((a < 0) != (b < 0)); | |
86 } | |
87 | |
88 /** | |
89 * @see IntrinsicIDs#UCMP_BT | |
90 */ | |
91 @INTRINSIC(UCMP_BT) | |
92 public static boolean belowThan(long a, long b) { | |
93 return (a < b) ^ ((a < 0) != (b < 0)); | |
94 } | |
95 | |
96 /** | |
97 * @see IntrinsicIDs#UCMP_BE | |
98 */ | |
99 @INTRINSIC(UCMP_BE) | |
100 public static boolean belowOrEqual(long a, long b) { | |
101 return (a <= b) ^ ((a < 0) != (b < 0)); | |
102 } | |
103 | |
104 | |
105 /** | |
106 * @see IntrinsicIDs#UDIV | |
107 */ | |
108 @INTRINSIC(UDIV) | |
109 public static int divide(int a, int b) { | |
110 return (int) ((a & MASK) / (b & MASK)); | |
111 } | |
112 | |
113 /** | |
114 * @see IntrinsicIDs#UREM | |
115 */ | |
116 @INTRINSIC(UREM) | |
117 public static int remainder(int a, int b) { | |
118 return (int) ((a & MASK) % (b & MASK)); | |
119 } | |
120 | |
121 | |
122 /** | |
123 * @see IntrinsicIDs#UDIV | |
124 */ | |
125 @INTRINSIC(UDIV) | |
126 public static long divide(long a, long b) { | |
127 return bi(a).divide(bi(b)).longValue(); | |
128 } | |
129 | |
130 /** | |
131 * @see IntrinsicIDs#UREM | |
132 */ | |
133 @INTRINSIC(UREM) | |
134 public static long remainder(long a, long b) { | |
135 return bi(a).remainder(bi(b)).longValue(); | |
136 } | |
137 | |
138 private static BigInteger bi(long unsigned) { | |
139 return unsigned >= 0 ? BigInteger.valueOf(unsigned) : BigInteger.valueOf(unsigned & 0x7fffffffffffffffL).setBit(63); | |
140 } | |
141 } | |
142 |