Mercurial > hg > graal-compiler
annotate graal/com.oracle.jvmci.asm/src/com/oracle/jvmci/asm/Assembler.java @ 21708:6df25b1418be
moved com.oracle.asm.** to jvmci-util.jar (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 03 Jun 2015 18:06:44 +0200 |
parents | graal/com.oracle.graal.asm/src/com/oracle/graal/asm/Assembler.java@48c1ebd24120 |
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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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moved com.oracle.asm.** to jvmci-util.jar (JBS:GRAAL-53)
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23 package com.oracle.jvmci.asm; |
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24 |
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25 import java.nio.*; |
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26 import java.util.*; |
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27 |
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renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
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28 import com.oracle.jvmci.code.*; |
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29 |
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30 /** |
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31 * The platform-independent base class for the assembler. |
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32 */ |
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33 public abstract class Assembler { |
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34 |
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Dropping Ci* prefixes. Some additional renamings in the api.code interface.
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35 public final TargetDescription target; |
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LabelHints are now collected in ArrayLists instead of HashSet
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36 private List<LabelHint> jumpDisplacementHints; |
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37 |
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38 /** |
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39 * Backing code buffer. |
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40 */ |
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41 private final Buffer codeBuffer; |
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42 |
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43 public Assembler(TargetDescription target) { |
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44 this.target = target; |
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45 if (target.arch.getByteOrder() == ByteOrder.BIG_ENDIAN) { |
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46 this.codeBuffer = new Buffer.BigEndian(); |
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47 } else { |
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48 this.codeBuffer = new Buffer.LittleEndian(); |
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49 } |
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50 } |
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51 |
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52 /** |
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53 * Returns the current position of the underlying code buffer. |
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54 * |
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55 * @return current position in code buffer |
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56 */ |
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57 public int position() { |
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58 return codeBuffer.position(); |
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59 } |
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60 |
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61 public final void emitByte(int x) { |
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62 codeBuffer.emitByte(x); |
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63 } |
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64 |
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65 public final void emitShort(int x) { |
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66 codeBuffer.emitShort(x); |
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67 } |
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68 |
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69 public final void emitInt(int x) { |
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70 codeBuffer.emitInt(x); |
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71 } |
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72 |
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73 public final void emitLong(long x) { |
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74 codeBuffer.emitLong(x); |
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75 } |
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76 |
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77 public final void emitByte(int b, int pos) { |
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78 codeBuffer.emitByte(b, pos); |
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79 } |
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80 |
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81 public final void emitShort(int b, int pos) { |
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82 codeBuffer.emitShort(b, pos); |
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83 } |
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84 |
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85 public final void emitInt(int b, int pos) { |
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86 codeBuffer.emitInt(b, pos); |
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87 } |
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88 |
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89 public final void emitLong(long b, int pos) { |
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90 codeBuffer.emitLong(b, pos); |
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91 } |
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92 |
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93 public final int getByte(int pos) { |
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94 return codeBuffer.getByte(pos); |
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95 } |
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96 |
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97 public final int getShort(int pos) { |
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98 return codeBuffer.getShort(pos); |
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99 } |
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100 |
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101 public final int getInt(int pos) { |
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102 return codeBuffer.getInt(pos); |
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103 } |
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104 |
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105 private static final String NEWLINE = System.getProperty("line.separator"); |
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106 |
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107 /** |
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108 * Some GPU architectures have a text based encoding. |
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109 */ |
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110 public final void emitString(String x) { |
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111 emitString0("\t"); // XXX REMOVE ME pretty-printing |
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112 emitString0(x); |
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113 emitString0(NEWLINE); |
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114 } |
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115 |
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116 // XXX for pretty-printing |
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117 public final void emitString0(String x) { |
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118 codeBuffer.emitBytes(x.getBytes(), 0, x.length()); |
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119 } |
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120 |
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121 public void emitString(String s, int pos) { |
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122 codeBuffer.emitBytes(s.getBytes(), pos); |
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123 } |
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124 |
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125 /** |
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126 * Closes this assembler. No extra data can be written to this assembler after this call. |
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127 * |
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128 * @param trimmedCopy if {@code true}, then a copy of the underlying byte array up to (but not |
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129 * including) {@code position()} is returned |
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130 * @return the data in this buffer or a trimmed copy if {@code trimmedCopy} is {@code true} |
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131 */ |
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132 public byte[] close(boolean trimmedCopy) { |
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133 return codeBuffer.close(trimmedCopy); |
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134 } |
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135 |
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136 public void bind(Label l) { |
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137 assert !l.isBound() : "can bind label only once"; |
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138 l.bind(position()); |
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139 l.patchInstructions(this); |
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140 } |
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141 |
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142 public abstract void align(int modulus); |
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143 |
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144 public abstract void jmp(Label l); |
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145 |
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146 protected abstract void patchJumpTarget(int branch, int jumpTarget); |
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147 |
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148 private Map<Label, String> nameMap; |
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149 |
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150 /** |
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151 * Creates a name for a label. |
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152 * |
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153 * @param l the label for which a name is being created |
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154 * @param id a label identifier that is unique with the scope of this assembler |
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155 * @return a label name in the form of "L123" |
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156 */ |
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157 protected String createLabelName(Label l, int id) { |
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158 return "L" + id; |
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159 } |
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160 |
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161 /** |
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162 * Gets a name for a label, creating it if it does not yet exist. By default, the returned name |
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163 * is only unique with the scope of this assembler. |
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164 */ |
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165 public String nameOf(Label l) { |
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166 if (nameMap == null) { |
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167 nameMap = new HashMap<>(); |
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168 } |
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169 String name = nameMap.get(l); |
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170 if (name == null) { |
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171 name = createLabelName(l, nameMap.size()); |
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172 nameMap.put(l, name); |
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173 } |
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174 return name; |
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175 } |
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176 |
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177 /** |
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178 * This is used by the CompilationResultBuilder to convert a {@link StackSlot} to an |
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179 * {@link AbstractAddress}. |
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180 */ |
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181 public abstract AbstractAddress makeAddress(Register base, int displacement); |
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182 |
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183 /** |
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184 * Returns a target specific placeholder address that can be used for code patching. |
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185 */ |
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186 public abstract AbstractAddress getPlaceholder(); |
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187 |
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188 /** |
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189 * Emits a NOP instruction to advance the current PC. |
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190 */ |
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191 public abstract void ensureUniquePC(); |
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192 |
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193 public void reset() { |
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194 codeBuffer.reset(); |
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195 captureLabelPositions(); |
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196 } |
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197 |
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198 private void captureLabelPositions() { |
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199 if (jumpDisplacementHints == null) { |
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200 return; |
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201 } |
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202 for (LabelHint request : this.jumpDisplacementHints) { |
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203 request.capture(); |
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204 } |
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205 } |
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206 |
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207 public LabelHint requestLabelHint(Label label) { |
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208 if (jumpDisplacementHints == null) { |
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209 jumpDisplacementHints = new ArrayList<>(); |
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210 } |
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211 LabelHint hint = new LabelHint(label, position()); |
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212 this.jumpDisplacementHints.add(hint); |
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213 return hint; |
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214 } |
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215 |
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216 public InstructionCounter getInstructionCounter() { |
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217 throw new UnsupportedOperationException("Instruction counter is not implemented for " + this); |
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218 } |
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219 |
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220 public static class LabelHint { |
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221 private Label label; |
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222 private int forPosition; |
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223 private int capturedTarget = -1; |
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224 |
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225 protected LabelHint(Label label, int lastPosition) { |
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226 super(); |
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227 this.label = label; |
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228 this.forPosition = lastPosition; |
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229 } |
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230 |
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231 protected void capture() { |
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232 this.capturedTarget = label.position(); |
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233 } |
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234 |
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235 public int getTarget() { |
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236 assert isValid(); |
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237 return capturedTarget; |
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238 } |
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239 |
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240 public int getPosition() { |
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241 assert isValid(); |
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242 return forPosition; |
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243 } |
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244 |
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245 public boolean isValid() { |
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246 return capturedTarget >= 0; |
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247 } |
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248 } |
20003
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249 |
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250 /** |
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251 * Instruction counter class which gives the user of the assembler to count different kinds of |
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252 * instructions in the generated assembler code. |
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253 */ |
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254 public interface InstructionCounter { |
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255 String[] getSupportedInstructionTypes(); |
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256 |
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257 int[] countInstructions(String[] instructionTypes, int beginPc, int endPc); |
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258 } |
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259 } |