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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/snippets/ObjectSubstitutions.java @ 7530:5e3d1a68664e

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applied mx eclipseformat to all Java files
author Doug Simon <doug.simon@oracle.com>
date Wed, 23 Jan 2013 16:34:57 +0100
parents f04a5e46cdd2
children be0d995ef51e
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
d526fa5640c8 replaced manual intrinsification of Object.getClass() with a snippet
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.hotspot.snippets;
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24
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25 import static com.oracle.graal.hotspot.snippets.HotSpotSnippetUtils.*;
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26 import static com.oracle.graal.nodes.extended.UnsafeCastNode.*;
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27 import static com.oracle.graal.snippets.nodes.BranchProbabilityNode.*;
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28
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29 import com.oracle.graal.hotspot.nodes.*;
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30 import com.oracle.graal.snippets.*;
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31 import com.oracle.graal.snippets.ClassSubstitution.MethodSubstitution;
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32 import com.oracle.graal.word.*;
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34 /**
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35 * Substitutions for {@link java.lang.Object} methods.
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36 */
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37 @ClassSubstitution(java.lang.Object.class)
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38 public class ObjectSubstitutions {
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39
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40 @MethodSubstitution(isStatic = false)
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41 public static Class<?> getClass(final Object thisObj) {
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42 Word hub = loadHub(thisObj);
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43 return unsafeCast(hub.readFinalObject(Word.signed(classMirrorOffset())), Class.class, true, true);
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44 }
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45
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46 @MethodSubstitution(isStatic = false)
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47 public static int hashCode(final Object thisObj) {
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48 Word mark = loadWordFromObject(thisObj, markOffset());
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49
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50 // this code is independent from biased locking (although it does not look that way)
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51 final Word biasedLock = mark.and(biasedLockMaskInPlace());
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52 if (biasedLock == Word.unsigned(unlockedMask())) {
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53 probability(0.99);
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54 int hash = (int) mark.unsignedShiftRight(identityHashCodeShift()).rawValue();
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55 if (hash != uninitializedIdentityHashCodeValue()) {
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56 probability(0.99);
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57 return hash;
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58 }
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59 }
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60
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61 return IdentityHashCodeStubCall.call(thisObj);
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62 }
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63 }