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annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiRegister.java @ 5503:438ab53efdd0

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Renaming CiKind => RiKind.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Thu, 07 Jun 2012 17:08:33 +0200
parents 12c63380e7ff
children 452f91ebdb54
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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 private static final long serialVersionUID = -7213269157816016300L;
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34
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35 /**
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36 * Invalid register.
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37 */
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38 public static final CiRegister None = new CiRegister(-1, -1, 0, "noreg");
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39
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40 /**
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41 * Frame pointer of the current method. All spill slots and outgoing stack-based arguments
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42 * are addressed relative to this register.
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43 */
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44 public static final CiRegister Frame = new CiRegister(-2, -2, 0, "framereg", RegisterFlag.CPU);
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45
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46 public static final CiRegister CallerFrame = new CiRegister(-3, -3, 0, "callerframereg", RegisterFlag.CPU);
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47
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48 /**
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49 * The identifier for this register that is unique across all the registers in a {@link CiArchitecture}.
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50 * A valid register has {@code number > 0}.
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51 */
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52 public final int number;
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53
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54 /**
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55 * The mnemonic of this register.
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56 */
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57 public final String name;
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58
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59 /**
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60 * The actual encoding in a target machine instruction for this register, which may or
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61 * may not be the same as {@link #number}.
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62 */
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63 public final int encoding;
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64
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65 /**
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66 * The size of the stack slot used to spill the value of this register.
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67 */
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68 public final int spillSlotSize;
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69
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70 /**
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71 * The set of {@link RegisterFlag} values associated with this register.
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72 */
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73 private final int flags;
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74
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75 /**
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76 * An array of {@link CiRegisterValue} objects, for this register, with one entry
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77 * per {@link RiKind}, indexed by {@link RiKind#ordinal}.
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78 */
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79 private final CiRegisterValue[] values;
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80
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81 /**
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82 * Attributes that characterize a register in a useful way.
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83 *
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84 */
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85 public enum RegisterFlag {
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86 /**
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87 * Denotes an integral (i.e. non floating point) register.
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88 */
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89 CPU,
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90
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91 /**
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92 * Denotes a register whose lowest order byte can be addressed separately.
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93 */
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94 Byte,
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95
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96 /**
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97 * Denotes a floating point register.
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98 */
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99 FPU;
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100
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101 public final int mask = 1 << (ordinal() + 1);
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102 }
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103
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104 /**
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105 * Creates a {@code CiRegister} instance.
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106 *
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107 * @param number unique identifier for the register
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108 * @param encoding the target machine encoding for the register
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109 * @param spillSlotSize the size of the stack slot used to spill the value of the register
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110 * @param name the mnemonic name for the register
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111 * @param flags the set of {@link RegisterFlag} values for the register
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112 */
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113 public CiRegister(int number, int encoding, int spillSlotSize, String name, RegisterFlag... flags) {
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114 this.number = number;
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115 this.name = name;
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116 this.spillSlotSize = spillSlotSize;
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117 this.flags = createMask(flags);
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118 this.encoding = encoding;
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119
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120 values = new CiRegisterValue[RiKind.VALUES.length];
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121 for (RiKind kind : RiKind.VALUES) {
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122 values[kind.ordinal()] = new CiRegisterValue(kind, this);
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123 }
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124 }
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125
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126 private static int createMask(RegisterFlag... flags) {
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127 int result = 0;
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128 for (RegisterFlag f : flags) {
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129 result |= f.mask;
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130 }
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131 return result;
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132 }
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133
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134 public boolean isSet(RegisterFlag f) {
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135 return (flags & f.mask) != 0;
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136 }
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137
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138 /**
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139 * Gets this register as a {@linkplain CiRegisterValue value} with a specified kind.
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140 * @param kind the specified kind
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141 * @return the {@link CiRegisterValue}
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142 */
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143 public CiRegisterValue asValue(RiKind kind) {
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144 return values[kind.ordinal()];
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145 }
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146
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147 /**
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148 * Gets this register as a {@linkplain CiRegisterValue value} with no particular kind.
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438ab53efdd0 Renaming CiKind => RiKind.
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149 * @return a {@link CiRegisterValue} with {@link RiKind#Illegal} kind.
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150 */
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151 public CiRegisterValue asValue() {
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152 return asValue(RiKind.Illegal);
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153 }
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154
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155 /**
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156 * Determines if this is a valid register.
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157 * @return {@code true} iff this register is valid
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158 */
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159 public boolean isValid() {
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160 return number >= 0;
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161 }
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162
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163 /**
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164 * Determines if this a floating point register.
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165 */
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166 public boolean isFpu() {
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167 return isSet(RegisterFlag.FPU);
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168 }
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169
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170 /**
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171 * Determines if this a general purpose register.
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172 */
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173 public boolean isCpu() {
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174 return isSet(RegisterFlag.CPU);
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175 }
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176
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177 /**
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178 * Determines if this register has the {@link RegisterFlag#Byte} attribute set.
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179 * @return {@code true} iff this register has the {@link RegisterFlag#Byte} attribute set.
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180 */
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181 public boolean isByte() {
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182 return isSet(RegisterFlag.Byte);
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183 }
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184
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185 /**
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186 * Categorizes a set of registers by {@link RegisterFlag}.
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187 *
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188 * @param registers a list of registers to be categorized
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189 * @return a map from each {@link RegisterFlag} constant to the list of registers for which the flag is
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190 * {@linkplain #isSet(RegisterFlag) set}
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191 */
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192 public static EnumMap<RegisterFlag, CiRegister[]> categorize(CiRegister[] registers) {
4142
bc8527f3071c Adjust code base to new level of warnings.
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193 EnumMap<RegisterFlag, CiRegister[]> result = new EnumMap<>(RegisterFlag.class);
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194 for (RegisterFlag flag : RegisterFlag.values()) {
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195 ArrayList<CiRegister> list = new ArrayList<>();
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196 for (CiRegister r : registers) {
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197 if (r.isSet(flag)) {
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198 list.add(r);
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199 }
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200 }
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201 result.put(flag, list.toArray(new CiRegister[list.size()]));
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202 }
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203 return result;
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204 }
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205
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206 /**
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207 * Gets the maximum register {@linkplain #number number} in a given set of registers.
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208 *
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209 * @param registers the set of registers to process
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210 * @return the maximum register number for any register in {@code registers}
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211 */
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212 public static int maxRegisterNumber(CiRegister[] registers) {
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213 int max = Integer.MIN_VALUE;
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214 for (CiRegister r : registers) {
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215 if (r.number > max) {
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diff changeset
216 max = r.number;
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217 }
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218 }
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219 return max;
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220 }
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221
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222 /**
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223 * Gets the maximum register {@linkplain #encoding encoding} in a given set of registers.
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224 *
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225 * @param registers the set of registers to process
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226 * @return the maximum register encoding for any register in {@code registers}
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227 */
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228 public static int maxRegisterEncoding(CiRegister[] registers) {
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diff changeset
229 int max = Integer.MIN_VALUE;
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230 for (CiRegister r : registers) {
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diff changeset
231 if (r.encoding > max) {
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diff changeset
232 max = r.encoding;
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diff changeset
233 }
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diff changeset
234 }
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235 return max;
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diff changeset
236 }
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237
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diff changeset
238 @Override
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diff changeset
239 public String toString() {
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diff changeset
240 return name;
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diff changeset
241 }
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242
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diff changeset
243 @Override
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diff changeset
244 public int compareTo(CiRegister o) {
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diff changeset
245 if (number < o.number) {
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diff changeset
246 return -1;
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diff changeset
247 }
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diff changeset
248 if (number > o.number) {
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diff changeset
249 return 1;
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diff changeset
250 }
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diff changeset
251 return 0;
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parents:
diff changeset
252 }
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diff changeset
253
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diff changeset
254 }