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annotate jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/PrimitiveConstant.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 1bbd4a7c274b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2009, 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 import java.nio.ByteBuffer;
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26
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27 /**
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28 * Represents a primitive constant value, such as an integer or floating point number, within the
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29 * compiler and across the compiler/runtime interface.
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30 */
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31 public class PrimitiveConstant implements JavaConstant, SerializableConstant {
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32
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33 private final JavaKind kind;
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34
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35 /**
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36 * The boxed primitive value as a {@code long}. For {@code float} and {@code double} values,
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37 * this value is the result of {@link Float#floatToRawIntBits(float)} and
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38 * {@link Double#doubleToRawLongBits(double)} respectively.
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39 */
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40 private final long primitive;
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41
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42 protected PrimitiveConstant(JavaKind kind, long primitive) {
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43 this.primitive = primitive;
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44 this.kind = kind;
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45
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46 assert kind.isPrimitive() || kind == JavaKind.Illegal;
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47 }
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48
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49 @Override
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50 public JavaKind getJavaKind() {
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51 return kind;
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52 }
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53
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54 @Override
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55 public boolean isNull() {
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56 return false;
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57 }
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58
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59 @Override
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60 public boolean isDefaultForKind() {
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61 return primitive == 0;
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62 }
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63
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64 @Override
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65 public boolean asBoolean() {
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66 assert getJavaKind() == JavaKind.Boolean;
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67 return primitive != 0L;
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68 }
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69
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70 @Override
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71 public int asInt() {
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72 assert getJavaKind().getStackKind() == JavaKind.Int : getJavaKind().getStackKind();
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73 return (int) primitive;
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74 }
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75
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76 @Override
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77 public long asLong() {
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78 assert getJavaKind().isNumericInteger();
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79 return primitive;
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80 }
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81
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82 @Override
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83 public float asFloat() {
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84 assert getJavaKind() == JavaKind.Float;
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85 return Float.intBitsToFloat((int) primitive);
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86 }
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87
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88 @Override
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89 public double asDouble() {
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90 assert getJavaKind() == JavaKind.Double;
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91 return Double.longBitsToDouble(primitive);
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92 }
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93
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94 @Override
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95 public Object asBoxedPrimitive() {
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96 switch (getJavaKind()) {
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97 case Byte:
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98 return Byte.valueOf((byte) primitive);
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99 case Boolean:
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100 return Boolean.valueOf(asBoolean());
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101 case Short:
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102 return Short.valueOf((short) primitive);
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103 case Char:
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104 return Character.valueOf((char) primitive);
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105 case Int:
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106 return Integer.valueOf(asInt());
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107 case Long:
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108 return Long.valueOf(asLong());
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109 case Float:
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110 return Float.valueOf(asFloat());
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111 case Double:
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112 return Double.valueOf(asDouble());
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113 default:
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114 throw new IllegalArgumentException("unexpected kind " + getJavaKind());
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115 }
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116 }
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117
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118 @Override
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119 public int getSerializedSize() {
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120 return getJavaKind().getByteCount();
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121 }
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122
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123 @Override
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124 public void serialize(ByteBuffer buffer) {
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125 switch (getJavaKind()) {
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126 case Byte:
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127 case Boolean:
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128 buffer.put((byte) primitive);
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129 break;
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130 case Short:
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131 buffer.putShort((short) primitive);
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132 break;
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133 case Char:
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134 buffer.putChar((char) primitive);
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135 break;
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136 case Int:
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137 buffer.putInt(asInt());
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138 break;
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139 case Long:
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140 buffer.putLong(asLong());
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141 break;
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142 case Float:
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143 buffer.putFloat(asFloat());
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144 break;
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145 case Double:
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146 buffer.putDouble(asDouble());
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147 break;
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148 default:
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149 throw new IllegalArgumentException("unexpected kind " + getJavaKind());
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150 }
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151 }
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152
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153 @Override
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154 public int hashCode() {
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155 return (int) (primitive ^ (primitive >>> 32)) * (getJavaKind().ordinal() + 31);
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156 }
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157
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158 @Override
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159 public boolean equals(Object o) {
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160 if (o == this) {
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161 return true;
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162 }
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163 if (!(o instanceof PrimitiveConstant)) {
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164 return false;
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165 }
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166 PrimitiveConstant other = (PrimitiveConstant) o;
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167 return this.kind.equals(other.kind) && this.primitive == other.primitive;
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168 }
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169
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170 @Override
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171 public String toString() {
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172 if (getJavaKind() == JavaKind.Illegal) {
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173 return "illegal";
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174 } else {
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175 return getJavaKind().getJavaName() + "[" + asBoxedPrimitive() + "|0x" + Long.toHexString(primitive) + "]";
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176 }
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177 }
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178 }