Mercurial > hg > truffle
annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiRegister.java @ 4266:e2499e6d8aa7
Merge
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 11 Jan 2012 16:31:46 +0100 |
parents | aaac4894175c |
children | 12c63380e7ff |
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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.max.cri.ci; |
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24 |
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25 import java.io.*; |
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26 import java.util.*; |
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27 |
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28 /** |
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29 * Represents a target machine register. |
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30 */ |
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31 public final class CiRegister implements Comparable<CiRegister>, Serializable { |
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32 |
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33 /** |
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34 * |
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35 */ |
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36 private static final long serialVersionUID = -7213269157816016300L; |
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37 |
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38 /** |
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39 * Invalid register. |
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40 */ |
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41 public static final CiRegister None = new CiRegister(-1, -1, 0, "noreg"); |
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42 |
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43 /** |
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44 * Frame pointer of the current method. All spill slots and outgoing stack-based arguments |
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45 * are addressed relative to this register. |
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46 */ |
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47 public static final CiRegister Frame = new CiRegister(-2, -2, 0, "framereg", RegisterFlag.CPU); |
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48 |
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49 public static final CiRegister CallerFrame = new CiRegister(-3, -3, 0, "callerframereg", RegisterFlag.CPU); |
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50 |
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51 /** |
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52 * The identifier for this register that is unique across all the registers in a {@link CiArchitecture}. |
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53 * A valid register has {@code number > 0}. |
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54 */ |
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55 public final int number; |
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56 |
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57 /** |
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58 * The mnemonic of this register. |
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59 */ |
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60 public final String name; |
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61 |
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62 /** |
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63 * The actual encoding in a target machine instruction for this register, which may or |
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64 * may not be the same as {@link #number}. |
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65 */ |
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66 public final int encoding; |
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67 |
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68 /** |
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69 * The size of the stack slot used to spill the value of this register. |
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70 */ |
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71 public final int spillSlotSize; |
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72 |
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73 /** |
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74 * The set of {@link RegisterFlag} values associated with this register. |
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75 */ |
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76 private final int flags; |
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77 |
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78 /** |
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79 * An array of {@link CiRegisterValue} objects, for this register, with one entry |
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80 * per {@link CiKind}, indexed by {@link CiKind#ordinal}. |
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81 */ |
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82 private final CiRegisterValue[] values; |
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83 |
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84 /** |
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85 * Attributes that characterize a register in a useful way. |
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86 * |
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87 */ |
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88 public enum RegisterFlag { |
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89 /** |
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90 * Denotes an integral (i.e. non floating point) register. |
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91 */ |
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92 CPU, |
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93 |
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94 /** |
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95 * Denotes a register whose lowest order byte can be addressed separately. |
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96 */ |
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97 Byte, |
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98 |
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99 /** |
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100 * Denotes a floating point register. |
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101 */ |
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102 FPU; |
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103 |
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104 public final int mask = 1 << (ordinal() + 1); |
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105 } |
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106 |
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107 /** |
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108 * Creates a {@code CiRegister} instance. |
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109 * |
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110 * @param number unique identifier for the register |
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111 * @param encoding the target machine encoding for the register |
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112 * @param spillSlotSize the size of the stack slot used to spill the value of the register |
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113 * @param name the mnemonic name for the register |
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114 * @param flags the set of {@link RegisterFlag} values for the register |
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115 */ |
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116 public CiRegister(int number, int encoding, int spillSlotSize, String name, RegisterFlag... flags) { |
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117 this.number = number; |
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118 this.name = name; |
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119 this.spillSlotSize = spillSlotSize; |
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120 this.flags = createMask(flags); |
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121 this.encoding = encoding; |
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122 |
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123 values = new CiRegisterValue[CiKind.VALUES.length]; |
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124 for (CiKind kind : CiKind.VALUES) { |
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125 values[kind.ordinal()] = new CiRegisterValue(kind, this); |
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126 } |
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127 } |
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128 |
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129 private static int createMask(RegisterFlag... flags) { |
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130 int result = 0; |
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131 for (RegisterFlag f : flags) { |
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132 result |= f.mask; |
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133 } |
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134 return result; |
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135 } |
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136 |
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137 public boolean isSet(RegisterFlag f) { |
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138 return (flags & f.mask) != 0; |
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139 } |
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140 |
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141 /** |
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142 * Gets this register as a {@linkplain CiRegisterValue value} with a specified kind. |
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143 * @param kind the specified kind |
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144 * @return the {@link CiRegisterValue} |
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145 */ |
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146 public CiRegisterValue asValue(CiKind kind) { |
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147 return values[kind.ordinal()]; |
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148 } |
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149 |
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150 /** |
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151 * Gets this register as a {@linkplain CiRegisterValue value} with no particular kind. |
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152 * @return a {@link CiRegisterValue} with {@link CiKind#Illegal} kind. |
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153 */ |
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154 public CiRegisterValue asValue() { |
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155 return asValue(CiKind.Illegal); |
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156 } |
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157 |
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158 /** |
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159 * Determines if this is a valid register. |
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160 * @return {@code true} iff this register is valid |
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161 */ |
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162 public boolean isValid() { |
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163 return number >= 0; |
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164 } |
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165 |
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166 /** |
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167 * Determines if this a floating point register. |
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168 */ |
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169 public boolean isFpu() { |
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170 return isSet(RegisterFlag.FPU); |
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171 } |
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172 |
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173 /** |
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174 * Determines if this a general purpose register. |
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175 */ |
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176 public boolean isCpu() { |
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177 return isSet(RegisterFlag.CPU); |
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178 } |
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179 |
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180 /** |
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181 * Determines if this register has the {@link RegisterFlag#Byte} attribute set. |
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182 * @return {@code true} iff this register has the {@link RegisterFlag#Byte} attribute set. |
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183 */ |
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184 public boolean isByte() { |
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185 return isSet(RegisterFlag.Byte); |
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186 } |
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187 |
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188 /** |
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189 * Categorizes a set of registers by {@link RegisterFlag}. |
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190 * |
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191 * @param registers a list of registers to be categorized |
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192 * @return a map from each {@link RegisterFlag} constant to the list of registers for which the flag is |
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193 * {@linkplain #isSet(RegisterFlag) set} |
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194 */ |
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195 public static EnumMap<RegisterFlag, CiRegister[]> categorize(CiRegister[] registers) { |
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196 EnumMap<RegisterFlag, CiRegister[]> result = new EnumMap<>(RegisterFlag.class); |
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197 for (RegisterFlag flag : RegisterFlag.values()) { |
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198 ArrayList<CiRegister> list = new ArrayList<>(); |
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199 for (CiRegister r : registers) { |
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200 if (r.isSet(flag)) { |
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201 list.add(r); |
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202 } |
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203 } |
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204 result.put(flag, list.toArray(new CiRegister[list.size()])); |
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205 } |
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206 return result; |
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207 } |
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208 |
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209 /** |
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210 * Gets the maximum register {@linkplain #number number} in a given set of registers. |
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211 * |
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212 * @param registers the set of registers to process |
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213 * @return the maximum register number for any register in {@code registers} |
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214 */ |
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215 public static int maxRegisterNumber(CiRegister[] registers) { |
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216 int max = Integer.MIN_VALUE; |
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217 for (CiRegister r : registers) { |
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218 if (r.number > max) { |
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219 max = r.number; |
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220 } |
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221 } |
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222 return max; |
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223 } |
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224 |
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225 /** |
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226 * Gets the maximum register {@linkplain #encoding encoding} in a given set of registers. |
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227 * |
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228 * @param registers the set of registers to process |
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229 * @return the maximum register encoding for any register in {@code registers} |
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230 */ |
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231 public static int maxRegisterEncoding(CiRegister[] registers) { |
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232 int max = Integer.MIN_VALUE; |
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233 for (CiRegister r : registers) { |
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234 if (r.encoding > max) { |
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235 max = r.encoding; |
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|
236 } |
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|
237 } |
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238 return max; |
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|
239 } |
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240 |
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241 @Override |
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242 public String toString() { |
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243 return name; |
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|
244 } |
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245 |
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246 @Override |
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247 public int compareTo(CiRegister o) { |
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248 if (number < o.number) { |
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249 return -1; |
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|
250 } |
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|
251 if (number > o.number) { |
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252 return 1; |
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253 } |
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|
254 return 0; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
255 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
256 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
257 } |