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annotate graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/Architecture.java @ 21556:48c1ebd24120

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renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Wed, 27 May 2015 00:36:16 +0200
parents graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/Architecture.java@d60dd21329f2
children
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1 /*
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2 * Copyright (c) 2009, 2011, 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.code;
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24
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25 import com.oracle.jvmci.meta.Kind;
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26 import com.oracle.jvmci.meta.PlatformKind;
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27 import java.nio.*;
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28 import java.util.*;
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30 import com.oracle.jvmci.code.Register.RegisterCategory;
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31
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32 /**
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33 * Represents a CPU architecture, including information such as its endianness, CPU registers, word
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34 * width, etc.
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35 */
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36 public abstract class Architecture {
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37
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38 /**
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39 * The number of entries required in a {@link ReferenceMap} covering all the registers that may
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40 * store references. The index of a register in the reference map is given by
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41 * {@link Register#getReferenceMapIndex()}.
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42 */
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43 private final int registerReferenceMapSize;
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44
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45 /**
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46 * Represents the natural size of words (typically registers and pointers) of this architecture,
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47 * in bytes.
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48 */
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49 private final int wordSize;
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50
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51 /**
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52 * The name of this architecture (e.g. "AMD64", "SPARCv9").
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53 */
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54 private final String name;
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55
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56 /**
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57 * Array of all available registers on this architecture. The index of each register in this
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58 * array is equal to its {@linkplain Register#number number}.
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59 */
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60 private final Register[] registers;
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62 /**
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63 * The byte ordering can be either little or big endian.
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64 */
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65 private final ByteOrder byteOrder;
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66
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67 /**
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68 * Whether the architecture supports unaligned memory accesses.
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69 */
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70 private final boolean unalignedMemoryAccess;
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71
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72 /**
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73 * Mask of the barrier constants denoting the barriers that are not required to be explicitly
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74 * inserted under this architecture.
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75 */
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76 private final int implicitMemoryBarriers;
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77
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78 /**
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79 * Offset in bytes from the beginning of a call instruction to the displacement.
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80 */
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81 private final int machineCodeCallDisplacementOffset;
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82
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83 /**
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84 * The size of the return address pushed to the stack by a call instruction. A value of 0
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85 * denotes that call linkage uses registers instead (e.g. SPARC).
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86 */
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87 private final int returnAddressSize;
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88
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89 protected Architecture(String name, int wordSize, ByteOrder byteOrder, boolean unalignedMemoryAccess, Register[] registers, int implicitMemoryBarriers, int nativeCallDisplacementOffset,
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90 int registerReferenceMapSize, int returnAddressSize) {
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91 this.name = name;
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92 this.registers = registers;
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93 this.wordSize = wordSize;
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94 this.byteOrder = byteOrder;
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95 this.unalignedMemoryAccess = unalignedMemoryAccess;
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96 this.implicitMemoryBarriers = implicitMemoryBarriers;
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97 this.machineCodeCallDisplacementOffset = nativeCallDisplacementOffset;
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98 this.registerReferenceMapSize = registerReferenceMapSize;
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99 this.returnAddressSize = returnAddressSize;
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100 }
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101
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102 /**
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103 * Converts this architecture to a string.
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104 *
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105 * @return the string representation of this architecture
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106 */
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107 @Override
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108 public final String toString() {
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109 return getName().toLowerCase();
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110 }
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111
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112 public int getRegisterReferenceMapSize() {
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113 return registerReferenceMapSize;
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114 }
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115
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116 /**
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117 * Gets the natural size of words (typically registers and pointers) of this architecture, in
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118 * bytes.
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119 */
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120 public int getWordSize() {
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121 return wordSize;
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122 }
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123
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124 /**
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125 * Gets the name of this architecture.
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126 */
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127 public String getName() {
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128 return name;
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129 }
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130
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131 /**
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132 * Gets an array of all available registers on this architecture. The index of each register in
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133 * this array is equal to its {@linkplain Register#number number}.
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134 */
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135 public Register[] getRegisters() {
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136 return registers.clone();
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137 }
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138
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139 public ByteOrder getByteOrder() {
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140 return byteOrder;
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141 }
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142
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143 /**
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144 * @return true if the architecture supports unaligned memory accesses.
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145 */
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146 public boolean supportsUnalignedMemoryAccess() {
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147 return unalignedMemoryAccess;
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148 }
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149
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150 /**
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151 * Gets the size of the return address pushed to the stack by a call instruction. A value of 0
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152 * denotes that call linkage uses registers instead.
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153 */
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154 public int getReturnAddressSize() {
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155 return returnAddressSize;
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156 }
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157
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158 /**
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159 * Gets the offset in bytes from the beginning of a call instruction to the displacement.
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160 */
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161 public int getMachineCodeCallDisplacementOffset() {
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162 return machineCodeCallDisplacementOffset;
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163 }
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164
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165 /**
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166 * Determines the barriers in a given barrier mask that are explicitly required on this
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167 * architecture.
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168 *
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169 * @param barriers a mask of the barrier constants
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170 * @return the value of {@code barriers} minus the barriers unnecessary on this architecture
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171 */
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172 public final int requiredBarriers(int barriers) {
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173 return barriers & ~implicitMemoryBarriers;
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174 }
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175
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176 /**
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177 * Gets the size in bytes of the specified kind for this target.
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178 *
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179 * @param kind the kind for which to get the size
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180 *
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181 * @return the size in bytes of {@code kind}
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182 */
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183 public int getSizeInBytes(PlatformKind kind) {
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184 switch ((Kind) kind) {
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185 case Boolean:
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186 return 1;
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187 case Byte:
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188 return 1;
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189 case Char:
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190 return 2;
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191 case Short:
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192 return 2;
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193 case Int:
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194 return 4;
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195 case Long:
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196 return 8;
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197 case Float:
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198 return 4;
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199 case Double:
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200 return 8;
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201 case Object:
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202 return wordSize;
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203 default:
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204 return 0;
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205 }
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206 }
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207
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208 /**
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209 * Determine whether a kind can be stored in a register of a given category.
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210 *
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211 * @param category the category of the register
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212 * @param kind the kind that should be stored in the register
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213 */
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214 public abstract boolean canStoreValue(RegisterCategory category, PlatformKind kind);
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215
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216 /**
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217 * Return the largest kind that can be stored in a register of a given category.
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218 *
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219 * @param category the category of the register
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220 * @return the largest kind that can be stored in a register {@code category}
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221 */
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222 public abstract PlatformKind getLargestStorableKind(RegisterCategory category);
18342
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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223
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224 @Override
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225 public final boolean equals(Object obj) {
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226 if (obj == this) {
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227 return true;
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228 }
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229 if (obj instanceof Architecture) {
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230 Architecture that = (Architecture) obj;
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diff changeset
231 if (this.name.equals(that.name)) {
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diff changeset
232 assert this.byteOrder.equals(that.byteOrder);
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diff changeset
233 assert this.implicitMemoryBarriers == that.implicitMemoryBarriers;
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diff changeset
234 assert this.machineCodeCallDisplacementOffset == that.machineCodeCallDisplacementOffset;
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diff changeset
235 assert this.registerReferenceMapSize == that.registerReferenceMapSize;
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diff changeset
236 assert Arrays.equals(this.registers, that.registers);
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diff changeset
237 assert this.returnAddressSize == that.returnAddressSize;
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diff changeset
238 assert this.unalignedMemoryAccess == that.unalignedMemoryAccess;
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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diff changeset
239 assert this.wordSize == that.wordSize;
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diff changeset
240 return true;
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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diff changeset
241 }
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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diff changeset
242 }
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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diff changeset
243 return false;
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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diff changeset
244 }
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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diff changeset
245
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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diff changeset
246 @Override
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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diff changeset
247 public final int hashCode() {
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diff changeset
248 return name.hashCode();
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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diff changeset
249 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff changeset
250 }