Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/SystemSubstitutions.java @ 8519:c91917e43c98
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author | Christos Kotselidis <christos.kotselidis@oracle.com> |
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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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34 |
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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 } |