Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/Bytes.java @ 11054:38ea2efa32a7
8010278: SA: provide mechanism for using an alternative SA debugger back-end.
Reviewed-by: sla, dsamersoff
| author | kevinw |
|---|---|
| date | Wed, 26 Jun 2013 00:01:20 +0100 |
| parents | 8eeffbc22f10 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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7197424: update copyright year to match last edit in jdk8 hotspot repository
mikael
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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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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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c18cbe5936b8
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trims
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20 * or visit www.oracle.com if you need additional information or have any |
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c18cbe5936b8
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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 } |