Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/Bytes.java @ 7402:fd74228fd5ca
8004076: Move _max_locals and _size_of_parameters to ConstMethod for better sharing.
Summary: Move _max_locals and _size_of_parameters to ConstMethod for better sharing.
Reviewed-by: coleenp, minqi, jrose
author | jiangli |
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date | Tue, 11 Dec 2012 12:41:31 -0500 |
parents | 8eeffbc22f10 |
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rev | line source |
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0 | 1 /* |
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b9a9ed0f8eeb
7197424: update copyright year to match last edit in jdk8 hotspot repository
mikael
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6782
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2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
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20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.runtime; | |
26 | |
27 import sun.jvm.hotspot.debugger.*; | |
6782 | 28 import sun.jvm.hotspot.utilities.PlatformInfo; |
0 | 29 |
30 /** Encapsulates some byte-swapping operations defined in the VM */ | |
31 | |
32 public class Bytes { | |
33 private boolean swap; | |
34 | |
35 public Bytes(MachineDescription machDesc) { | |
6881 | 36 swap = !machDesc.isBigEndian(); |
0 | 37 } |
38 | |
39 /** Should only swap if the hardware's underlying byte order is | |
40 different from Java's */ | |
41 public short swapShort(short x) { | |
42 if (!swap) | |
43 return x; | |
44 | |
45 return (short) (((x >> 8) & 0xFF) | (x << 8)); | |
46 } | |
47 | |
48 /** Should only swap if the hardware's underlying byte order is | |
49 different from Java's */ | |
50 public int swapInt(int x) { | |
51 if (!swap) | |
52 return x; | |
53 | |
54 return (swapShort((short) x) << 16) | (swapShort((short) (x >> 16)) & 0xFFFF); | |
55 } | |
56 | |
57 /** Should only swap if the hardware's underlying byte order is | |
58 different from Java's */ | |
59 public long swapLong(long x) { | |
60 if (!swap) | |
61 return x; | |
62 | |
63 return (swapInt((int) x) << 32) | (swapInt((int) (x >> 32)) & 0xFFFFFFFF); | |
64 } | |
65 } |