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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/SystemSubstitutions.java @ 8519:c91917e43c98

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-Merge
author Christos Kotselidis <christos.kotselidis@oracle.com>
date Tue, 26 Mar 2013 10:51:42 +0100
parents c36e8ded27d4 68b04162180e
children b648515abd0a
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1 /*
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2 * Copyright (c) 2011, 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
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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.replacements;
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24
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25 import static com.oracle.graal.hotspot.replacements.HotSpotSnippetUtils.*;
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26 import static com.oracle.graal.replacements.nodes.BranchProbabilityNode.*;
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27
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28 import com.oracle.graal.api.code.RuntimeCallTarget.Descriptor;
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29 import com.oracle.graal.api.replacements.*;
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30 import com.oracle.graal.graph.Node.ConstantNodeParameter;
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31 import com.oracle.graal.graph.Node.NodeIntrinsic;
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32 import com.oracle.graal.nodes.extended.*;
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33 import com.oracle.graal.replacements.*;
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35 /**
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36 * Substitutions for {@link java.lang.System} methods.
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37 */
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38 @ClassSubstitution(java.lang.System.class)
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39 public class SystemSubstitutions {
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40
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41 public static final Descriptor JAVA_TIME_MILLIS = new Descriptor("javaTimeMillis", false, long.class);
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42 public static final Descriptor JAVA_TIME_NANOS = new Descriptor("javaTimeNanos", false, long.class);
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43
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44 @MacroSubstitution(macro = ArrayCopyNode.class)
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45 public static native void arraycopy(Object src, int srcPos, Object dest, int destPos, int length);
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46
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47 @MethodSubstitution
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48 public static long currentTimeMillis() {
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49 return callLong(JAVA_TIME_MILLIS);
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50 }
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51
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52 @MethodSubstitution
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53 public static long nanoTime() {
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54 return callLong(JAVA_TIME_NANOS);
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55 }
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56
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57 @MethodSubstitution
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58 public static int identityHashCode(Object x) {
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59 if (x == null) {
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60 probability(NOT_FREQUENT_PROBABILITY);
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61 return 0;
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62 }
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63
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64 return computeHashCode(x);
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65 }
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66
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67 @NodeIntrinsic(value = RuntimeCallNode.class, setStampFromReturnType = true)
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68 public static long callLong(@ConstantNodeParameter Descriptor descriptor) {
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69 if (descriptor == JAVA_TIME_MILLIS) {
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70 return System.currentTimeMillis();
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71 }
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72 assert descriptor == JAVA_TIME_NANOS;
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73 return System.nanoTime();
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74 }
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75 }