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annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiRegister.java @ 5504:452f91ebdb54

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Moved RiKind to cri.ri package.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Thu, 07 Jun 2012 17:09:57 +0200
parents 438ab53efdd0
children dc71b06d09f8
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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 import com.oracle.max.cri.ri.*;
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29
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30 /**
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31 * Represents a target machine register.
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32 */
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33 public final class CiRegister implements Comparable<CiRegister>, Serializable {
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34
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35 private static final long serialVersionUID = -7213269157816016300L;
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36
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37 /**
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38 * Invalid register.
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39 */
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40 public static final CiRegister None = new CiRegister(-1, -1, 0, "noreg");
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41
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42 /**
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43 * Frame pointer of the current method. All spill slots and outgoing stack-based arguments
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44 * are addressed relative to this register.
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45 */
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46 public static final CiRegister Frame = new CiRegister(-2, -2, 0, "framereg", RegisterFlag.CPU);
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47
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48 public static final CiRegister CallerFrame = new CiRegister(-3, -3, 0, "callerframereg", RegisterFlag.CPU);
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49
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50 /**
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51 * The identifier for this register that is unique across all the registers in a {@link CiArchitecture}.
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52 * A valid register has {@code number > 0}.
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53 */
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54 public final int number;
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55
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56 /**
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57 * The mnemonic of this register.
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58 */
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59 public final String name;
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60
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61 /**
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62 * The actual encoding in a target machine instruction for this register, which may or
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63 * may not be the same as {@link #number}.
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64 */
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65 public final int encoding;
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66
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67 /**
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68 * The size of the stack slot used to spill the value of this register.
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69 */
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70 public final int spillSlotSize;
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71
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72 /**
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73 * The set of {@link RegisterFlag} values associated with this register.
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74 */
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75 private final int flags;
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76
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77 /**
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78 * An array of {@link CiRegisterValue} objects, for this register, with one entry
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79 * per {@link RiKind}, indexed by {@link RiKind#ordinal}.
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80 */
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81 private final CiRegisterValue[] values;
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82
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83 /**
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84 * Attributes that characterize a register in a useful way.
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85 *
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86 */
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87 public enum RegisterFlag {
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88 /**
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89 * Denotes an integral (i.e. non floating point) register.
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90 */
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91 CPU,
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92
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93 /**
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94 * Denotes a register whose lowest order byte can be addressed separately.
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95 */
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96 Byte,
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97
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98 /**
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99 * Denotes a floating point register.
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100 */
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101 FPU;
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102
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103 public final int mask = 1 << (ordinal() + 1);
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104 }
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105
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106 /**
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107 * Creates a {@code CiRegister} instance.
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108 *
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109 * @param number unique identifier for the register
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110 * @param encoding the target machine encoding for the register
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111 * @param spillSlotSize the size of the stack slot used to spill the value of the register
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112 * @param name the mnemonic name for the register
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113 * @param flags the set of {@link RegisterFlag} values for the register
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114 */
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115 public CiRegister(int number, int encoding, int spillSlotSize, String name, RegisterFlag... flags) {
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116 this.number = number;
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117 this.name = name;
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118 this.spillSlotSize = spillSlotSize;
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119 this.flags = createMask(flags);
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120 this.encoding = encoding;
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121
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122 values = new CiRegisterValue[RiKind.VALUES.length];
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123 for (RiKind kind : RiKind.VALUES) {
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124 values[kind.ordinal()] = new CiRegisterValue(kind, this);
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125 }
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126 }
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127
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128 private static int createMask(RegisterFlag... flags) {
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129 int result = 0;
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130 for (RegisterFlag f : flags) {
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131 result |= f.mask;
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132 }
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133 return result;
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134 }
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135
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136 public boolean isSet(RegisterFlag f) {
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137 return (flags & f.mask) != 0;
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138 }
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139
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140 /**
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141 * Gets this register as a {@linkplain CiRegisterValue value} with a specified kind.
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142 * @param kind the specified kind
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143 * @return the {@link CiRegisterValue}
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144 */
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438ab53efdd0 Renaming CiKind => RiKind.
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diff changeset
145 public CiRegisterValue asValue(RiKind kind) {
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146 return values[kind.ordinal()];
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147 }
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148
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149 /**
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150 * Gets this register as a {@linkplain CiRegisterValue value} with no particular kind.
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438ab53efdd0 Renaming CiKind => RiKind.
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151 * @return a {@link CiRegisterValue} with {@link RiKind#Illegal} kind.
3733
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152 */
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153 public CiRegisterValue asValue() {
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438ab53efdd0 Renaming CiKind => RiKind.
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154 return asValue(RiKind.Illegal);
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155 }
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156
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157 /**
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158 * Determines if this is a valid register.
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159 * @return {@code true} iff this register is valid
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160 */
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161 public boolean isValid() {
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162 return number >= 0;
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163 }
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164
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165 /**
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166 * Determines if this a floating point register.
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167 */
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168 public boolean isFpu() {
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169 return isSet(RegisterFlag.FPU);
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170 }
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171
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172 /**
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173 * Determines if this a general purpose register.
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174 */
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175 public boolean isCpu() {
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176 return isSet(RegisterFlag.CPU);
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177 }
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178
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179 /**
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180 * Determines if this register has the {@link RegisterFlag#Byte} attribute set.
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181 * @return {@code true} iff this register has the {@link RegisterFlag#Byte} attribute set.
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182 */
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183 public boolean isByte() {
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184 return isSet(RegisterFlag.Byte);
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185 }
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186
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187 /**
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188 * Categorizes a set of registers by {@link RegisterFlag}.
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189 *
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190 * @param registers a list of registers to be categorized
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191 * @return a map from each {@link RegisterFlag} constant to the list of registers for which the flag is
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192 * {@linkplain #isSet(RegisterFlag) set}
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193 */
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194 public static EnumMap<RegisterFlag, CiRegister[]> categorize(CiRegister[] registers) {
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bc8527f3071c Adjust code base to new level of warnings.
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195 EnumMap<RegisterFlag, CiRegister[]> result = new EnumMap<>(RegisterFlag.class);
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196 for (RegisterFlag flag : RegisterFlag.values()) {
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diff changeset
197 ArrayList<CiRegister> list = new ArrayList<>();
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198 for (CiRegister r : registers) {
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199 if (r.isSet(flag)) {
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200 list.add(r);
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201 }
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202 }
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diff changeset
203 result.put(flag, list.toArray(new CiRegister[list.size()]));
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204 }
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205 return result;
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206 }
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207
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208 /**
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209 * Gets the maximum register {@linkplain #number number} in a given set of registers.
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210 *
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211 * @param registers the set of registers to process
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212 * @return the maximum register number for any register in {@code registers}
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213 */
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214 public static int maxRegisterNumber(CiRegister[] registers) {
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215 int max = Integer.MIN_VALUE;
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216 for (CiRegister r : registers) {
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diff changeset
217 if (r.number > max) {
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diff changeset
218 max = r.number;
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219 }
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220 }
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221 return max;
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222 }
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223
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224 /**
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diff changeset
225 * Gets the maximum register {@linkplain #encoding encoding} in a given set of registers.
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226 *
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227 * @param registers the set of registers to process
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228 * @return the maximum register encoding for any register in {@code registers}
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229 */
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diff changeset
230 public static int maxRegisterEncoding(CiRegister[] registers) {
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diff changeset
231 int max = Integer.MIN_VALUE;
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diff changeset
232 for (CiRegister r : registers) {
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diff changeset
233 if (r.encoding > max) {
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diff changeset
234 max = r.encoding;
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diff changeset
235 }
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diff changeset
236 }
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diff changeset
237 return max;
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diff changeset
238 }
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239
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diff changeset
240 @Override
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diff changeset
241 public String toString() {
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diff changeset
242 return name;
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diff changeset
243 }
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diff changeset
244
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diff changeset
245 @Override
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diff changeset
246 public int compareTo(CiRegister o) {
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parents:
diff changeset
247 if (number < o.number) {
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diff changeset
248 return -1;
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diff changeset
249 }
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diff changeset
250 if (number > o.number) {
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diff changeset
251 return 1;
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parents:
diff changeset
252 }
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diff changeset
253 return 0;
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parents:
diff changeset
254 }
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diff changeset
255
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diff changeset
256 }