Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/PlatformKind.java @ 24111:8abcd8e1285d
missing checks in HotSpotMemoryAccessProviderImpl can cause VM assertions to fail (JDK-8177673)
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 30 Mar 2017 21:18:43 +0200 |
parents | 1d4ce2d19e52 |
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Use platform specific kind in backend.
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1 /* |
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2 * Copyright (c) 2013, 2015, 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 jdk.vm.ci.meta; |
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24 |
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25 /** |
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26 * Represents a platform-specific low-level type for values. |
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27 */ |
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28 public interface PlatformKind { |
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29 |
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30 String name(); |
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31 |
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32 public interface Key { |
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33 |
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34 } |
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35 |
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36 class EnumKey<E extends Enum<E>> implements Key { |
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37 private final Enum<E> e; |
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38 |
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39 public EnumKey(Enum<E> e) { |
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40 this.e = e; |
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41 } |
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42 |
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43 @Override |
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44 public int hashCode() { |
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45 return e.ordinal(); |
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46 } |
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47 |
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48 @Override |
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49 public boolean equals(Object obj) { |
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50 if (obj == this) { |
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51 return true; |
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52 } |
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53 if (obj instanceof EnumKey) { |
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54 EnumKey<?> that = (EnumKey<?>) obj; |
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55 return this.e == that.e; |
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56 } |
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57 return false; |
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58 } |
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59 } |
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60 |
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61 /** |
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62 * Gets a value associated with this object that can be used as a stable key in a map. The |
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63 * {@link Object#hashCode()} implementation of the returned value should be stable between VM |
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64 * executions. |
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65 */ |
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66 Key getKey(); |
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67 |
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68 /** |
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69 * Get the size in bytes of this {@link PlatformKind}. |
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70 */ |
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71 int getSizeInBytes(); |
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72 |
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73 /** |
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74 * Returns how many primitive values fit in this {@link PlatformKind}. For scalar types this is |
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75 * one, for SIMD types it may be higher. |
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76 */ |
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77 int getVectorLength(); |
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78 |
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79 /** |
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80 * Gets a single type char that identifies this type for use in debug output. |
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81 */ |
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82 char getTypeChar(); |
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83 } |