Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/Architecture.java @ 22672:1bbd4a7c274b
Rename jdk.internal.jvmci to jdk.vm.ci
| author | Tom Rodriguez <tom.rodriguez@oracle.com> |
|---|---|
| date | Thu, 08 Oct 2015 17:28:41 -0700 |
| parents | jvmci/jdk.internal.jvmci.code/src/jdk/internal/jvmci/code/Architecture.java@3abba3d4aef1 |
| children | ef7d87db544a |
| rev | line source |
|---|---|
| 22054 | 1 /* |
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2 * Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved. |
| 22054 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 */ | |
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23 package jdk.vm.ci.code; |
| 22054 | 24 |
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25 import java.nio.ByteOrder; |
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26 import java.util.Arrays; |
| 22054 | 27 |
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28 import jdk.vm.ci.code.Register.RegisterCategory; |
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29 import jdk.vm.ci.meta.JavaKind; |
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30 import jdk.vm.ci.meta.PlatformKind; |
| 22054 | 31 |
| 32 /** | |
| 33 * Represents a CPU architecture, including information such as its endianness, CPU registers, word | |
| 34 * width, etc. | |
| 35 */ | |
| 36 public abstract class Architecture { | |
| 37 | |
| 38 /** | |
| 39 * The number of entries required in a {@link ReferenceMap} covering all the registers that may | |
| 40 * store references. The index of a register in the reference map is given by | |
| 41 * {@link Register#getReferenceMapIndex()}. | |
| 42 */ | |
| 43 private final int registerReferenceMapSize; | |
| 44 | |
| 45 /** | |
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46 * The architecture specific type of a native word. |
| 22054 | 47 */ |
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48 private final PlatformKind wordKind; |
| 22054 | 49 |
| 50 /** | |
| 51 * The name of this architecture (e.g. "AMD64", "SPARCv9"). | |
| 52 */ | |
| 53 private final String name; | |
| 54 | |
| 55 /** | |
| 56 * Array of all available registers on this architecture. The index of each register in this | |
| 57 * array is equal to its {@linkplain Register#number number}. | |
| 58 */ | |
| 59 private final Register[] registers; | |
| 60 | |
| 61 /** | |
| 62 * The byte ordering can be either little or big endian. | |
| 63 */ | |
| 64 private final ByteOrder byteOrder; | |
| 65 | |
| 66 /** | |
| 67 * Whether the architecture supports unaligned memory accesses. | |
| 68 */ | |
| 69 private final boolean unalignedMemoryAccess; | |
| 70 | |
| 71 /** | |
| 72 * Mask of the barrier constants denoting the barriers that are not required to be explicitly | |
| 73 * inserted under this architecture. | |
| 74 */ | |
| 75 private final int implicitMemoryBarriers; | |
| 76 | |
| 77 /** | |
| 78 * Offset in bytes from the beginning of a call instruction to the displacement. | |
| 79 */ | |
| 80 private final int machineCodeCallDisplacementOffset; | |
| 81 | |
| 82 /** | |
| 83 * The size of the return address pushed to the stack by a call instruction. A value of 0 | |
| 84 * denotes that call linkage uses registers instead (e.g. SPARC). | |
| 85 */ | |
| 86 private final int returnAddressSize; | |
| 87 | |
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88 protected Architecture(String name, PlatformKind wordKind, ByteOrder byteOrder, boolean unalignedMemoryAccess, Register[] registers, int implicitMemoryBarriers, int nativeCallDisplacementOffset, |
| 22054 | 89 int registerReferenceMapSize, int returnAddressSize) { |
| 90 this.name = name; | |
| 91 this.registers = registers; | |
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92 this.wordKind = wordKind; |
| 22054 | 93 this.byteOrder = byteOrder; |
| 94 this.unalignedMemoryAccess = unalignedMemoryAccess; | |
| 95 this.implicitMemoryBarriers = implicitMemoryBarriers; | |
| 96 this.machineCodeCallDisplacementOffset = nativeCallDisplacementOffset; | |
| 97 this.registerReferenceMapSize = registerReferenceMapSize; | |
| 98 this.returnAddressSize = returnAddressSize; | |
| 99 } | |
| 100 | |
| 101 /** | |
| 102 * Converts this architecture to a string. | |
| 103 * | |
| 104 * @return the string representation of this architecture | |
| 105 */ | |
| 106 @Override | |
| 107 public final String toString() { | |
| 108 return getName().toLowerCase(); | |
| 109 } | |
| 110 | |
| 111 public int getRegisterReferenceMapSize() { | |
| 112 return registerReferenceMapSize; | |
| 113 } | |
| 114 | |
| 115 /** | |
| 116 * Gets the natural size of words (typically registers and pointers) of this architecture, in | |
| 117 * bytes. | |
| 118 */ | |
| 119 public int getWordSize() { | |
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120 return wordKind.getSizeInBytes(); |
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121 } |
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122 |
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123 public PlatformKind getWordKind() { |
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124 return wordKind; |
| 22054 | 125 } |
| 126 | |
| 127 /** | |
| 128 * Gets the name of this architecture. | |
| 129 */ | |
| 130 public String getName() { | |
| 131 return name; | |
| 132 } | |
| 133 | |
| 134 /** | |
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135 * Gets an array of all registers that exist on this architecture. This contains all registers |
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136 * that exist in the specification of this architecture. Not all of them may be available on |
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137 * this particular architecture instance. The index of each register in this array is equal to |
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138 * its {@linkplain Register#number number}. |
| 22054 | 139 */ |
| 140 public Register[] getRegisters() { | |
| 141 return registers.clone(); | |
| 142 } | |
| 143 | |
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144 /** |
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145 * Gets an array of all registers available for storing values on this architecture. This may be |
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146 * a subset of {@link #getRegisters()}, depending on the capabilities of this particular CPU. |
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147 */ |
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148 public Register[] getAvailableValueRegisters() { |
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149 return getRegisters(); |
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150 } |
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151 |
| 22054 | 152 public ByteOrder getByteOrder() { |
| 153 return byteOrder; | |
| 154 } | |
| 155 | |
| 156 /** | |
| 157 * @return true if the architecture supports unaligned memory accesses. | |
| 158 */ | |
| 159 public boolean supportsUnalignedMemoryAccess() { | |
| 160 return unalignedMemoryAccess; | |
| 161 } | |
| 162 | |
| 163 /** | |
| 164 * Gets the size of the return address pushed to the stack by a call instruction. A value of 0 | |
| 165 * denotes that call linkage uses registers instead. | |
| 166 */ | |
| 167 public int getReturnAddressSize() { | |
| 168 return returnAddressSize; | |
| 169 } | |
| 170 | |
| 171 /** | |
| 172 * Gets the offset in bytes from the beginning of a call instruction to the displacement. | |
| 173 */ | |
| 174 public int getMachineCodeCallDisplacementOffset() { | |
| 175 return machineCodeCallDisplacementOffset; | |
| 176 } | |
| 177 | |
| 178 /** | |
| 179 * Determines the barriers in a given barrier mask that are explicitly required on this | |
| 180 * architecture. | |
| 181 * | |
| 182 * @param barriers a mask of the barrier constants | |
| 183 * @return the value of {@code barriers} minus the barriers unnecessary on this architecture | |
| 184 */ | |
| 185 public final int requiredBarriers(int barriers) { | |
| 186 return barriers & ~implicitMemoryBarriers; | |
| 187 } | |
| 188 | |
| 189 /** | |
| 190 * Determine whether a kind can be stored in a register of a given category. | |
| 191 * | |
| 192 * @param category the category of the register | |
| 193 * @param kind the kind that should be stored in the register | |
| 194 */ | |
| 195 public abstract boolean canStoreValue(RegisterCategory category, PlatformKind kind); | |
| 196 | |
| 197 /** | |
| 198 * Return the largest kind that can be stored in a register of a given category. | |
| 199 * | |
| 200 * @param category the category of the register | |
| 201 * @return the largest kind that can be stored in a register {@code category} | |
| 202 */ | |
| 203 public abstract PlatformKind getLargestStorableKind(RegisterCategory category); | |
| 204 | |
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205 /** |
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206 * Return the {@link PlatformKind} that is used to store values of a given {@link JavaKind}. |
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207 */ |
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208 public abstract PlatformKind getPlatformKind(JavaKind javaKind); |
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209 |
| 22054 | 210 @Override |
| 211 public final boolean equals(Object obj) { | |
| 212 if (obj == this) { | |
| 213 return true; | |
| 214 } | |
| 215 if (obj instanceof Architecture) { | |
| 216 Architecture that = (Architecture) obj; | |
| 217 if (this.name.equals(that.name)) { | |
| 218 assert this.byteOrder.equals(that.byteOrder); | |
| 219 assert this.implicitMemoryBarriers == that.implicitMemoryBarriers; | |
| 220 assert this.machineCodeCallDisplacementOffset == that.machineCodeCallDisplacementOffset; | |
| 221 assert this.registerReferenceMapSize == that.registerReferenceMapSize; | |
| 222 assert Arrays.equals(this.registers, that.registers); | |
| 223 assert this.returnAddressSize == that.returnAddressSize; | |
| 224 assert this.unalignedMemoryAccess == that.unalignedMemoryAccess; | |
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225 assert this.wordKind == that.wordKind; |
| 22054 | 226 return true; |
| 227 } | |
| 228 } | |
| 229 return false; | |
| 230 } | |
| 231 | |
| 232 @Override | |
| 233 public final int hashCode() { | |
| 234 return name.hashCode(); | |
| 235 } | |
| 236 } |