Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/runtime/Bytes.java @ 18665:96861e3f8cc5
made CFGPrinterObserver reset (upon close) properly
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Thu, 11 Dec 2014 22:14:30 +0100 |
parents | 8eeffbc22f10 |
children |
line wrap: on
line source
/* * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ package sun.jvm.hotspot.runtime; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.utilities.PlatformInfo; /** Encapsulates some byte-swapping operations defined in the VM */ public class Bytes { private boolean swap; public Bytes(MachineDescription machDesc) { swap = !machDesc.isBigEndian(); } /** Should only swap if the hardware's underlying byte order is different from Java's */ public short swapShort(short x) { if (!swap) return x; return (short) (((x >> 8) & 0xFF) | (x << 8)); } /** Should only swap if the hardware's underlying byte order is different from Java's */ public int swapInt(int x) { if (!swap) return x; return (swapShort((short) x) << 16) | (swapShort((short) (x >> 16)) & 0xFFFF); } /** Should only swap if the hardware's underlying byte order is different from Java's */ public long swapLong(long x) { if (!swap) return x; return (swapInt((int) x) << 32) | (swapInt((int) (x >> 32)) & 0xFFFFFFFF); } }