Mercurial > hg > truffle
annotate graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/JavaConstant.java @ 21784:f4e1d958f1c3
[AMD64] Create AMD64 specific address nodes.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Mon, 08 Jun 2015 19:19:45 +0200 |
parents | 48c1ebd24120 |
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1 /* |
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2 * Copyright (c) 2009, 2014, 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.jvmci.meta; |
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24 |
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25 /** |
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26 * Represents a constant (boxed) value, such as an integer, floating point number, or object |
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27 * reference, within the compiler and across the compiler/runtime interface. Exports a set of |
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28 * {@code JavaConstant} instances that represent frequently used constant values, such as |
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29 * {@link #NULL_POINTER}. |
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30 */ |
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31 public interface JavaConstant extends Constant, JavaValue, Value { |
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32 |
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33 /* |
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34 * Using a larger cache for integers leads to only a slight increase in cache hit ratio which is |
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35 * not enough to justify the impact on startup time. |
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36 */ |
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37 JavaConstant NULL_POINTER = new NullConstant(); |
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38 PrimitiveConstant INT_MINUS_1 = new PrimitiveConstant(Kind.Int, -1); |
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39 PrimitiveConstant INT_0 = new PrimitiveConstant(Kind.Int, 0); |
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40 PrimitiveConstant INT_1 = new PrimitiveConstant(Kind.Int, 1); |
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41 PrimitiveConstant INT_2 = new PrimitiveConstant(Kind.Int, 2); |
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42 PrimitiveConstant LONG_0 = new PrimitiveConstant(Kind.Long, 0L); |
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43 PrimitiveConstant LONG_1 = new PrimitiveConstant(Kind.Long, 1L); |
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44 PrimitiveConstant FLOAT_0 = new PrimitiveConstant(Kind.Float, Float.floatToRawIntBits(0.0F)); |
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45 PrimitiveConstant FLOAT_1 = new PrimitiveConstant(Kind.Float, Float.floatToRawIntBits(1.0F)); |
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46 PrimitiveConstant DOUBLE_0 = new PrimitiveConstant(Kind.Double, Double.doubleToRawLongBits(0.0D)); |
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47 PrimitiveConstant DOUBLE_1 = new PrimitiveConstant(Kind.Double, Double.doubleToRawLongBits(1.0D)); |
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48 PrimitiveConstant TRUE = new PrimitiveConstant(Kind.Boolean, 1L); |
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49 PrimitiveConstant FALSE = new PrimitiveConstant(Kind.Boolean, 0L); |
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50 |
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51 /** |
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52 * Checks whether this constant is null. |
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53 * |
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54 * @return {@code true} if this constant is the null constant |
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55 */ |
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56 boolean isNull(); |
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57 |
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58 static boolean isNull(Constant c) { |
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59 if (c instanceof JavaConstant) { |
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60 return ((JavaConstant) c).isNull(); |
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61 } else { |
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62 return false; |
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63 } |
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64 } |
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65 |
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66 /** |
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67 * Checks whether this constant is non-null. |
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68 * |
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69 * @return {@code true} if this constant is a primitive, or an object constant that is not null |
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70 */ |
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71 default boolean isNonNull() { |
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72 return !isNull(); |
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73 } |
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74 |
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75 /** |
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76 * Checks whether this constant is the default value for its kind (null, 0, 0.0, false). |
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77 * |
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78 * @return {@code true} if this constant is the default value for its kind |
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79 */ |
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80 boolean isDefaultForKind(); |
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81 |
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82 /** |
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83 * Returns the value of this constant as a boxed Java value. |
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84 * |
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85 * @return the value of this constant |
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86 */ |
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87 Object asBoxedPrimitive(); |
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88 |
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89 /** |
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90 * Returns the primitive int value this constant represents. The constant must have a |
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91 * {@link Kind#getStackKind()} of {@link Kind#Int}. |
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92 * |
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93 * @return the constant value |
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94 */ |
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95 int asInt(); |
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96 |
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97 /** |
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98 * Returns the primitive boolean value this constant represents. The constant must have kind |
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99 * {@link Kind#Boolean}. |
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100 * |
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101 * @return the constant value |
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102 */ |
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103 boolean asBoolean(); |
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104 |
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105 /** |
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106 * Returns the primitive long value this constant represents. The constant must have kind |
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107 * {@link Kind#Long}, a {@link Kind#getStackKind()} of {@link Kind#Int}. |
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108 * |
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109 * @return the constant value |
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110 */ |
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111 long asLong(); |
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112 |
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113 /** |
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114 * Returns the primitive float value this constant represents. The constant must have kind |
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115 * {@link Kind#Float}. |
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116 * |
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117 * @return the constant value |
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118 */ |
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119 float asFloat(); |
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120 |
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121 /** |
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122 * Returns the primitive double value this constant represents. The constant must have kind |
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123 * {@link Kind#Double}. |
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124 * |
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125 * @return the constant value |
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126 */ |
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127 double asDouble(); |
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128 |
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129 default String toValueString() { |
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130 if (getKind() == Kind.Illegal) { |
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131 return "illegal"; |
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132 } else { |
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133 return getKind().format(asBoxedPrimitive()); |
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134 } |
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135 } |
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136 |
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137 static String toString(JavaConstant constant) { |
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138 if (constant.getKind() == Kind.Illegal) { |
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139 return "illegal"; |
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140 } else { |
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141 return constant.getKind().getJavaName() + "[" + constant.toValueString() + "]"; |
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142 } |
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143 } |
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144 |
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145 /** |
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146 * Creates a boxed double constant. |
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147 * |
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148 * @param d the double value to box |
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149 * @return a boxed copy of {@code value} |
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150 */ |
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151 static PrimitiveConstant forDouble(double d) { |
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152 if (Double.compare(0.0D, d) == 0) { |
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153 return DOUBLE_0; |
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154 } |
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155 if (Double.compare(d, 1.0D) == 0) { |
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156 return DOUBLE_1; |
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157 } |
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158 return new PrimitiveConstant(Kind.Double, Double.doubleToRawLongBits(d)); |
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159 } |
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160 |
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161 /** |
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162 * Creates a boxed float constant. |
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163 * |
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164 * @param f the float value to box |
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165 * @return a boxed copy of {@code value} |
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166 */ |
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167 static PrimitiveConstant forFloat(float f) { |
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168 if (Float.compare(f, 0.0F) == 0) { |
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169 return FLOAT_0; |
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170 } |
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171 if (Float.compare(f, 1.0F) == 0) { |
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172 return FLOAT_1; |
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173 } |
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174 return new PrimitiveConstant(Kind.Float, Float.floatToRawIntBits(f)); |
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175 } |
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176 |
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177 /** |
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178 * Creates a boxed long constant. |
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179 * |
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180 * @param i the long value to box |
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181 * @return a boxed copy of {@code value} |
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182 */ |
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183 static PrimitiveConstant forLong(long i) { |
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184 if (i == 0) { |
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185 return LONG_0; |
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186 } else if (i == 1) { |
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187 return LONG_1; |
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188 } else { |
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189 return new PrimitiveConstant(Kind.Long, i); |
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190 } |
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191 } |
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192 |
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193 /** |
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194 * Creates a boxed integer constant. |
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195 * |
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196 * @param i the integer value to box |
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197 * @return a boxed copy of {@code value} |
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198 */ |
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199 static PrimitiveConstant forInt(int i) { |
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200 switch (i) { |
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201 case -1: |
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202 return INT_MINUS_1; |
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203 case 0: |
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204 return INT_0; |
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205 case 1: |
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206 return INT_1; |
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207 case 2: |
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208 return INT_2; |
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209 default: |
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210 return new PrimitiveConstant(Kind.Int, i); |
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211 } |
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212 } |
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213 |
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214 /** |
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215 * Creates a boxed byte constant. |
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216 * |
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217 * @param i the byte value to box |
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218 * @return a boxed copy of {@code value} |
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219 */ |
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|
220 static PrimitiveConstant forByte(byte i) { |
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221 return new PrimitiveConstant(Kind.Byte, i); |
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222 } |
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223 |
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|
224 /** |
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225 * Creates a boxed boolean constant. |
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226 * |
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|
227 * @param i the boolean value to box |
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228 * @return a boxed copy of {@code value} |
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229 */ |
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|
230 static PrimitiveConstant forBoolean(boolean i) { |
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231 return i ? TRUE : FALSE; |
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232 } |
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233 |
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234 /** |
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|
235 * Creates a boxed char constant. |
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236 * |
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237 * @param i the char value to box |
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238 * @return a boxed copy of {@code value} |
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239 */ |
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240 static PrimitiveConstant forChar(char i) { |
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241 return new PrimitiveConstant(Kind.Char, i); |
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242 } |
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243 |
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244 /** |
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245 * Creates a boxed short constant. |
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246 * |
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247 * @param i the short value to box |
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248 * @return a boxed copy of {@code value} |
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249 */ |
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250 static PrimitiveConstant forShort(short i) { |
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251 return new PrimitiveConstant(Kind.Short, i); |
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252 } |
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253 |
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254 /** |
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255 * Creates a {@link JavaConstant} from a primitive integer of a certain kind. |
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256 */ |
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257 static PrimitiveConstant forIntegerKind(Kind kind, long i) { |
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258 switch (kind) { |
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259 case Boolean: |
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260 return forBoolean(i != 0); |
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261 case Byte: |
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262 return forByte((byte) i); |
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263 case Short: |
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264 return forShort((short) i); |
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265 case Char: |
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266 return forChar((char) i); |
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267 case Int: |
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268 return forInt((int) i); |
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269 case Long: |
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270 return forLong(i); |
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271 default: |
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272 throw new IllegalArgumentException("not an integer kind: " + kind); |
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273 } |
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274 } |
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275 |
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276 /** |
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277 * Creates a {@link JavaConstant} from a primitive integer of a certain width. |
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278 */ |
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279 static PrimitiveConstant forPrimitiveInt(int bits, long i) { |
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280 assert bits <= 64; |
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281 switch (bits) { |
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282 case 1: |
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283 return forBoolean(i != 0); |
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284 case 8: |
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285 return forByte((byte) i); |
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286 case 16: |
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287 return forShort((short) i); |
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288 case 32: |
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289 return forInt((int) i); |
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290 case 64: |
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291 return forLong(i); |
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292 default: |
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293 throw new IllegalArgumentException("unsupported integer width: " + bits); |
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294 } |
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295 } |
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296 |
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297 /** |
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298 * Creates a boxed constant for the given boxed primitive value. |
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299 * |
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300 * @param value the Java boxed value |
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301 * @return the primitive constant holding the {@code value} |
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302 */ |
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303 static PrimitiveConstant forBoxedPrimitive(Object value) { |
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304 if (value instanceof Boolean) { |
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305 return forBoolean((Boolean) value); |
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306 } else if (value instanceof Byte) { |
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307 return forByte((Byte) value); |
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308 } else if (value instanceof Character) { |
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309 return forChar((Character) value); |
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310 } else if (value instanceof Short) { |
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311 return forShort((Short) value); |
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312 } else if (value instanceof Integer) { |
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313 return forInt((Integer) value); |
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314 } else if (value instanceof Long) { |
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315 return forLong((Long) value); |
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316 } else if (value instanceof Float) { |
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317 return forFloat((Float) value); |
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318 } else if (value instanceof Double) { |
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319 return forDouble((Double) value); |
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320 } else { |
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321 return null; |
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322 } |
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323 } |
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324 |
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325 static PrimitiveConstant forIllegal() { |
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326 return new PrimitiveConstant(Kind.Illegal, 0); |
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327 } |
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328 |
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329 /** |
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330 * Returns a constant with the default value for the given kind. |
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331 */ |
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332 static JavaConstant defaultForKind(Kind kind) { |
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333 switch (kind) { |
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334 case Boolean: |
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335 return FALSE; |
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336 case Byte: |
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337 return forByte((byte) 0); |
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338 case Char: |
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339 return forChar((char) 0); |
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340 case Short: |
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341 return forShort((short) 0); |
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342 case Int: |
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343 return INT_0; |
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344 case Double: |
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345 return DOUBLE_0; |
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346 case Float: |
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347 return FLOAT_0; |
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348 case Long: |
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349 return LONG_0; |
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350 case Object: |
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351 return NULL_POINTER; |
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352 default: |
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353 throw new IllegalArgumentException(kind.toString()); |
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354 } |
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355 } |
11477
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356 |
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357 /** |
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358 * Returns the zero value for a given numeric kind. |
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359 */ |
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360 static JavaConstant zero(Kind kind) { |
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361 switch (kind) { |
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362 case Boolean: |
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363 return FALSE; |
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364 case Byte: |
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365 return forByte((byte) 0); |
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366 case Char: |
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367 return forChar((char) 0); |
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368 case Double: |
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369 return DOUBLE_0; |
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370 case Float: |
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371 return FLOAT_0; |
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372 case Int: |
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373 return INT_0; |
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374 case Long: |
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375 return LONG_0; |
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376 case Short: |
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377 return forShort((short) 0); |
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378 default: |
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379 throw new IllegalArgumentException(kind.toString()); |
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380 } |
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381 } |
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382 |
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383 /** |
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384 * Returns the one value for a given numeric kind. |
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385 */ |
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386 static JavaConstant one(Kind kind) { |
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387 switch (kind) { |
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388 case Boolean: |
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389 return TRUE; |
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390 case Byte: |
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391 return forByte((byte) 1); |
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392 case Char: |
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393 return forChar((char) 1); |
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394 case Double: |
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395 return DOUBLE_1; |
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396 case Float: |
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397 return FLOAT_1; |
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398 case Int: |
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399 return INT_1; |
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400 case Long: |
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401 return LONG_1; |
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402 case Short: |
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403 return forShort((short) 1); |
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404 default: |
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405 throw new IllegalArgumentException(kind.toString()); |
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406 } |
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407 } |
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408 |
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409 /** |
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410 * Adds two numeric constants. |
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411 */ |
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412 static JavaConstant add(JavaConstant x, JavaConstant y) { |
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413 assert x.getKind() == y.getKind(); |
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414 switch (x.getKind()) { |
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415 case Byte: |
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416 return forByte((byte) (x.asInt() + y.asInt())); |
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417 case Char: |
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418 return forChar((char) (x.asInt() + y.asInt())); |
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419 case Double: |
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420 return forDouble(x.asDouble() + y.asDouble()); |
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421 case Float: |
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422 return forFloat(x.asFloat() + y.asFloat()); |
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423 case Int: |
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424 return forInt(x.asInt() + y.asInt()); |
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425 case Long: |
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426 return forLong(x.asLong() + y.asLong()); |
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427 case Short: |
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428 return forShort((short) (x.asInt() + y.asInt())); |
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429 default: |
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430 throw new IllegalArgumentException(x.getKind().toString()); |
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431 } |
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432 } |
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|
433 |
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|
434 /** |
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435 * Multiplies two numeric constants. |
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|
436 */ |
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|
437 static PrimitiveConstant mul(JavaConstant x, JavaConstant y) { |
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438 assert x.getKind() == y.getKind(); |
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439 switch (x.getKind()) { |
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440 case Byte: |
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441 return forByte((byte) (x.asInt() * y.asInt())); |
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parents:
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442 case Char: |
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|
443 return forChar((char) (x.asInt() * y.asInt())); |
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|
444 case Double: |
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|
445 return forDouble(x.asDouble() * y.asDouble()); |
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|
446 case Float: |
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|
447 return forFloat(x.asFloat() * y.asFloat()); |
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parents:
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|
448 case Int: |
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|
449 return forInt(x.asInt() * y.asInt()); |
4b41416685e9
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parents:
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|
450 case Long: |
4b41416685e9
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diff
changeset
|
451 return forLong(x.asLong() * y.asLong()); |
4b41416685e9
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|
452 case Short: |
4b41416685e9
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parents:
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diff
changeset
|
453 return forShort((short) (x.asInt() * y.asInt())); |
4b41416685e9
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parents:
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|
454 default: |
4b41416685e9
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changeset
|
455 throw new IllegalArgumentException(x.getKind().toString()); |
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New static factory methods for constants and arithmetic.
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parents:
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changeset
|
456 } |
4b41416685e9
New static factory methods for constants and arithmetic.
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parents:
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diff
changeset
|
457 } |
3733
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
458 } |