1 /* 2 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package jdk.vm.ci.meta; 24 25 /** 26 * Represents a platform-specific low-level type for values. 27 */ 28 public interface PlatformKind { 29 30 String name(); 31 32 public interface Key { 33 34 } 35 36 class EnumKey<E extends Enum<E>> implements Key { 37 private final Enum<E> e; 38 39 public EnumKey(Enum<E> e) { 40 this.e = e; 41 } 42 43 @Override 44 public int hashCode() { 45 return e.ordinal(); 46 } 47 48 @Override 49 public boolean equals(Object obj) { 50 if (obj == this) { 51 return true; 52 } 53 if (obj instanceof EnumKey) { 54 EnumKey<?> that = (EnumKey<?>) obj; 55 return this.e == that.e; 56 } 57 return false; 58 } 59 } 60 61 /** 62 * Gets a value associated with this object that can be used as a stable key in a map. The 63 * {@link Object#hashCode()} implementation of the returned value should be stable between VM 64 * executions. 65 */ 66 Key getKey(); 67 68 /** 69 * Get the size in bytes of this {@link PlatformKind}. 70 */ 71 int getSizeInBytes(); 72 73 /** 74 * Returns how many primitive values fit in this {@link PlatformKind}. For scalar types this is 75 * one, for SIMD types it may be higher. 76 */ 77 int getVectorLength(); 78 79 /** 80 * Gets a single type char that identifies this type for use in debug output. 81 */ 82 char getTypeChar(); 83 }