Mercurial > hg > graal-jvmci-8

annotate graal/com.oracle.max.cri/src/com/sun/cri/ci/CiAddress.java @ 3733:e233f5660da4

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Added Java files from Maxine project.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 19:59:18 +0100
parents
children bc8527f3071c
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3733
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1 /*
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2 * Copyright (c) 2010, 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.sun.cri.ci;
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24
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25 /**
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26 * Represents an address in target machine memory, specified via some combination of a base register, an index register,
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27 * a displacement and a scale. Note that the base and index registers may be {@link CiVariable variable}, that is as yet
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28 * unassigned to target machine registers.
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29 */
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30 public final class CiAddress extends CiValue {
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31
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32 /**
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33 * A sentinel value used as a place holder in an instruction stream for an address that will be patched.
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34 */
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35 public static final CiAddress Placeholder = new CiAddress(CiKind.Illegal, CiRegister.None.asValue());
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36
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37 /**
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38 * Base register that defines the start of the address computation; always present.
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39 */
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40 public final CiValue base;
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41 /**
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42 * Optional index register, the value of which (possibly scaled by {@link #scale}) is added to {@link #base}.
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43 * If not present, is denoted by {@link CiValue#IllegalValue}.
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44 */
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45 public final CiValue index;
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46 /**
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47 * Scaling factor for indexing, dependent on target operand size.
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48 */
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49 public final Scale scale;
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50 /**
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51 * Optional additive displacement.
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52 */
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53 public final int displacement;
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54
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55 /**
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56 * Creates a {@code CiAddress} with given base register, no scaling and no displacement.
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57 * @param kind the kind of the value being addressed
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58 * @param base the base register
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59 */
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60 public CiAddress(CiKind kind, CiValue base) {
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61 this(kind, base, IllegalValue, Scale.Times1, 0);
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62 }
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63
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64 /**
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65 * Creates a {@code CiAddress} with given base register, no scaling and a given displacement.
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66 * @param kind the kind of the value being addressed
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67 * @param base the base register
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68 * @param displacement the displacement
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69 */
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70 public CiAddress(CiKind kind, CiValue base, int displacement) {
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71 this(kind, base, IllegalValue, Scale.Times1, displacement);
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72 }
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73
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74 /**
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75 * Creates a {@code CiAddress} with given base and offset registers, no scaling and no displacement.
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76 * @param kind the kind of the value being addressed
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77 * @param base the base register
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78 * @param offset the offset register
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79 */
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80 public CiAddress(CiKind kind, CiValue base, CiValue offset) {
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81 this(kind, base, offset, Scale.Times1, 0);
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82 }
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83
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84 /**
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85 * Creates a {@code CiAddress} with given base and index registers, scaling and displacement.
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86 * This is the most general constructor..
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87 * @param kind the kind of the value being addressed
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88 * @param base the base register
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89 * @param index the index register
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90 * @param scale the scaling factor
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91 * @param displacement the displacement
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92 */
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93 public CiAddress(CiKind kind, CiValue base, CiValue index, Scale scale, int displacement) {
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94 super(kind);
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95
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96 if (index.isConstant()) {
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97 long longIndex = ((CiConstant) index).asLong();
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98 long longDisp = displacement + longIndex * scale.value;
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99 if ((int) longIndex != longIndex || (int) longDisp != longDisp) {
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100 throw new Error("integer overflow when computing constant displacement");
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101 }
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102 displacement = (int) longDisp;
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103 index = IllegalValue;
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104 scale = Scale.Times1;
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105 }
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106 assert base.isIllegal() || base.isVariableOrRegister();
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107 assert index.isIllegal() || index.isVariableOrRegister();
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108
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109 this.base = base;
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110 this.index = index;
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111 this.scale = scale;
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112 this.displacement = displacement;
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113 }
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114
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115 /**
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116 * A scaling factor used in complex addressing modes such as those supported by x86 platforms.
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117 */
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118 public enum Scale {
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119 Times1(1, 0),
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120 Times2(2, 1),
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121 Times4(4, 2),
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122 Times8(8, 3);
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123
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124 Scale(int value, int log2) {
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125 this.value = value;
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126 this.log2 = log2;
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127 }
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128
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129 /**
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130 * The value (or multiplier) of this scale.
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131 */
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132 public final int value;
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133
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134 /**
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135 * The {@linkplain #value value} of this scale log 2.
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136 */
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137 public final int log2;
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138
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139 public static Scale fromInt(int scale) {
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140 // Checkstyle: stop
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141 switch (scale) {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
142 case 1: return Times1;
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
143 case 2: return Times2;
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
144 case 4: return Times4;
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
145 case 8: return Times8;
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
146 default: throw new IllegalArgumentException(String.valueOf(scale));
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
147 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
148 // Checkstyle: resume
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
149 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
150
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
151 public static Scale fromShift(int shift) {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
152 return fromInt(1 << shift);
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
153 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
154 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
155
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
156 /**
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
157 * If the base register is a {@link CiRegisterValue} returns the associated {@link CiRegister}
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
158 * otherwise raises an exception..
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
159 * @return the base {@link CiRegister}
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
160 * @exception Error if {@code base} is not a {@link CiRegisterValue}
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
161 */
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
162 public CiRegister base() {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
163 return base.asRegister();
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
164 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
165
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
166 /**
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
167 * If the index register is a {@link CiRegisterValue} returns the associated {@link CiRegister}
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
168 * otherwise raises an exception..
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
169 * @return the base {@link CiRegister}
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
170 * @exception Error if {@code index} is not a {@link CiRegisterValue}
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
171 */
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
172 public CiRegister index() {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
173 return index.asRegister();
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
174 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
175
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
176 /**
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
177 * Encodes the possible addressing modes as a simple value.
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
178 */
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
179 public enum Format {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
180 BASE,
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
181 BASE_DISP,
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
182 BASE_INDEX,
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
183 BASE_INDEX_DISP,
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
184 PLACEHOLDER;
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
185 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
186
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
187 /**
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
188 * Returns the {@link Format encoded addressing mode} that this {@code CiAddress} represents.
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
189 * @return the encoded addressing mode
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
190 */
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
191 public Format format() {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
192 if (this == Placeholder) {
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
193 return Format.PLACEHOLDER;
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
194 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
195 assert base.isLegal();
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
196 if (index.isLegal()) {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
197 if (displacement != 0) {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
198 return Format.BASE_INDEX_DISP;
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
199 } else {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
200 return Format.BASE_INDEX;
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
201 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
202 } else {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
203 if (displacement != 0) {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
204 return Format.BASE_DISP;
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
205 } else {
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
206 return Format.BASE;
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
207 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
208 }
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
209 }
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
210
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
211 private static String s(CiValue location) {
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
212 if (location.isRegister()) {
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
213 return location.asRegister().name;
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
214 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
215 assert location.isVariable();
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
216 return "v" + ((CiVariable) location).index;
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
217 }
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
218
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
219 private static String signed(int i) {
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
220 if (i >= 0) {
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
221 return "+" + i;
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
222 }
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
223 return String.valueOf(i);
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
224 }
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
225
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
226 @Override
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
227 public String name() {
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
228 // Checkstyle: stop
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
229 switch (format()) {
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
230 case BASE : return "[" + s(base) + "]";
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
231 case BASE_DISP : return "[" + s(base) + signed(displacement) + "]";
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
232 case BASE_INDEX : return "[" + s(base) + "+" + s(index) + "]";
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
233 case BASE_INDEX_DISP : return "[" + s(base) + "+(" + s(index) + "*" + scale.value + ")" + signed(displacement) + "]";
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
234 case PLACEHOLDER : return "[<placeholder>]";
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
235 default : throw new IllegalArgumentException("unknown format: " + format());
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
236 }
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
237 // Checkstyle: resume
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
238 }
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
239
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
240 @Override
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
241 public boolean equals(Object obj) {
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
242 if (obj instanceof CiAddress) {
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
243 CiAddress addr = (CiAddress) obj;
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
244 return kind == addr.kind && displacement == addr.displacement && base.equals(addr.base) && scale == addr.scale && index.equals(addr.index);
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
245 }
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
246 return false;
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
247 }
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
248
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
249 @Override
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
250 public boolean equalsIgnoringKind(CiValue o) {
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
251 if (o instanceof CiAddress) {
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
252 CiAddress addr = (CiAddress) o;
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
253 return displacement == addr.displacement && base.equalsIgnoringKind(addr.base) && scale == addr.scale && index.equalsIgnoringKind(addr.index);
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
254 }
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
255 return false;
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
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
258 @Override
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
259 public int hashCode() {
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
260 return (base.hashCode() << 4) | kind.ordinal();
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
261 }
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
262 }