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annotate jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/PlatformKind.java @ 24225:a2dbb6fcc923

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Added tag jvmci-0.33 for changeset 3aed4cb813f4
author Doug Simon <doug.simon@oracle.com>
date Fri, 18 Aug 2017 22:47:33 +0200
parents 1d4ce2d19e52
children
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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 }