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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/DefaultVirtualFrame.java @ 20023:cef214c6d74a

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extract methods to avoid code duplication
author Christian Wirth <christian.wirth@oracle.com>
date Tue, 24 Mar 2015 17:33:15 +0100
parents 94f16a759646
children
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1 /*
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2 * Copyright (c) 2012, 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. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.impl;
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27 import java.util.*;
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29 import com.oracle.truffle.api.*;
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30 import com.oracle.truffle.api.frame.*;
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31
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32 /**
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33 * This is an implementation-specific class. Do not use or instantiate it. Instead, use
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34 * {@link TruffleRuntime#createVirtualFrame(Object[], FrameDescriptor)} to create a
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35 * {@link VirtualFrame}.
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36 */
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37 final class DefaultVirtualFrame implements VirtualFrame {
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38
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39 private final FrameDescriptor descriptor;
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40 private final Object[] arguments;
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41 private Object[] locals;
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42 private byte[] tags;
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43
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44 DefaultVirtualFrame(FrameDescriptor descriptor, Object[] arguments) {
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45 this.descriptor = descriptor;
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46 this.arguments = arguments;
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47 this.locals = new Object[descriptor.getSize()];
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48 Arrays.fill(locals, descriptor.getDefaultValue());
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49 this.tags = new byte[descriptor.getSize()];
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50 }
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52 @Override
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53 public Object[] getArguments() {
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54 return arguments;
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55 }
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57 @Override
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58 public MaterializedFrame materialize() {
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59 return new DefaultMaterializedFrame(this);
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60 }
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62 @Override
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63 public Object getObject(FrameSlot slot) throws FrameSlotTypeException {
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64 verifyGet(slot, FrameSlotKind.Object);
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65 return locals[slot.getIndex()];
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66 }
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68 @Override
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69 public void setObject(FrameSlot slot, Object value) {
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70 verifySet(slot, FrameSlotKind.Object);
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71 locals[slot.getIndex()] = value;
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72 }
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74 @Override
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75 public byte getByte(FrameSlot slot) throws FrameSlotTypeException {
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76 verifyGet(slot, FrameSlotKind.Byte);
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77 return (byte) locals[slot.getIndex()];
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78 }
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79
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80 @Override
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81 public void setByte(FrameSlot slot, byte value) {
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82 verifySet(slot, FrameSlotKind.Byte);
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83 locals[slot.getIndex()] = value;
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84 }
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85
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86 @Override
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87 public boolean getBoolean(FrameSlot slot) throws FrameSlotTypeException {
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88 verifyGet(slot, FrameSlotKind.Boolean);
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89 return (boolean) locals[slot.getIndex()];
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90 }
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92 @Override
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93 public void setBoolean(FrameSlot slot, boolean value) {
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94 verifySet(slot, FrameSlotKind.Boolean);
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95 locals[slot.getIndex()] = value;
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96 }
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98 @Override
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99 public int getInt(FrameSlot slot) throws FrameSlotTypeException {
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100 verifyGet(slot, FrameSlotKind.Int);
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101 return (int) locals[slot.getIndex()];
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102 }
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103
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104 @Override
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105 public void setInt(FrameSlot slot, int value) {
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106 verifySet(slot, FrameSlotKind.Int);
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107 locals[slot.getIndex()] = value;
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108 }
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109
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110 @Override
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111 public long getLong(FrameSlot slot) throws FrameSlotTypeException {
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112 verifyGet(slot, FrameSlotKind.Long);
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113 return (long) locals[slot.getIndex()];
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114 }
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115
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116 @Override
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117 public void setLong(FrameSlot slot, long value) {
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118 verifySet(slot, FrameSlotKind.Long);
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119 locals[slot.getIndex()] = value;
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120 }
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121
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122 @Override
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123 public float getFloat(FrameSlot slot) throws FrameSlotTypeException {
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124 verifyGet(slot, FrameSlotKind.Float);
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125 return (float) locals[slot.getIndex()];
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126 }
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127
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128 @Override
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129 public void setFloat(FrameSlot slot, float value) {
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130 verifySet(slot, FrameSlotKind.Float);
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131 locals[slot.getIndex()] = value;
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132 }
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133
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134 @Override
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135 public double getDouble(FrameSlot slot) throws FrameSlotTypeException {
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136 verifyGet(slot, FrameSlotKind.Double);
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137 return (double) locals[slot.getIndex()];
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138 }
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139
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140 @Override
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141 public void setDouble(FrameSlot slot, double value) {
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142 verifySet(slot, FrameSlotKind.Double);
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143 locals[slot.getIndex()] = value;
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144 }
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145
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146 @Override
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147 public FrameDescriptor getFrameDescriptor() {
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148 return this.descriptor;
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149 }
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150
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151 @Override
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152 public Object getValue(FrameSlot slot) {
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153 int slotIndex = getSlotIndexChecked(slot);
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154 return locals[slotIndex];
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155 }
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156
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157 private int getSlotIndexChecked(FrameSlot slot) {
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158 int slotIndex = slot.getIndex();
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159 if (slotIndex >= tags.length) {
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160 if (!resize()) {
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161 throw new IllegalArgumentException(String.format("The frame slot '%s' is not known by the frame descriptor.", slot));
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162 }
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163 }
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164 return slotIndex;
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165 }
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166
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167 private void verifySet(FrameSlot slot, FrameSlotKind accessKind) {
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168 int slotIndex = getSlotIndexChecked(slot);
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169 tags[slotIndex] = (byte) accessKind.ordinal();
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170 }
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171
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172 private void verifyGet(FrameSlot slot, FrameSlotKind accessKind) throws FrameSlotTypeException {
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173 int slotIndex = getSlotIndexChecked(slot);
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174 byte tag = tags[slotIndex];
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175 if (accessKind == FrameSlotKind.Object ? tag != 0 : tag != accessKind.ordinal()) {
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176 throw new FrameSlotTypeException();
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177 }
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178 }
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179
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180 private boolean resize() {
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181 int oldSize = tags.length;
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182 int newSize = descriptor.getSize();
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183 if (newSize > oldSize) {
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184 locals = Arrays.copyOf(locals, newSize);
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185 Arrays.fill(locals, oldSize, newSize, descriptor.getDefaultValue());
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186 tags = Arrays.copyOf(tags, newSize);
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187 return true;
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188 }
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189 return false;
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190 }
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191
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192 private byte getTag(FrameSlot slot) {
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193 int slotIndex = getSlotIndexChecked(slot);
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194 return tags[slotIndex];
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195 }
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196
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197 @Override
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198 public boolean isObject(FrameSlot slot) {
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199 return getTag(slot) == FrameSlotKind.Object.ordinal();
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200 }
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201
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202 @Override
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203 public boolean isByte(FrameSlot slot) {
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204 return getTag(slot) == FrameSlotKind.Byte.ordinal();
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205 }
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206
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207 @Override
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208 public boolean isBoolean(FrameSlot slot) {
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209 return getTag(slot) == FrameSlotKind.Boolean.ordinal();
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210 }
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211
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212 @Override
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213 public boolean isInt(FrameSlot slot) {
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214 return getTag(slot) == FrameSlotKind.Int.ordinal();
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215 }
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216
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217 @Override
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218 public boolean isLong(FrameSlot slot) {
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219 return getTag(slot) == FrameSlotKind.Long.ordinal();
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220 }
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221
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222 @Override
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223 public boolean isFloat(FrameSlot slot) {
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224 return getTag(slot) == FrameSlotKind.Float.ordinal();
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225 }
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226
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227 @Override
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228 public boolean isDouble(FrameSlot slot) {
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229 return getTag(slot) == FrameSlotKind.Double.ordinal();
9952
5d91b0b67cba Introduce Frame.isInitialized in the Truffle API.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 9330
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230 }
7267
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
231 }