Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.max.cri/src/com/sun/cri/ci/CiRegisterConfig.java @ 3733:e233f5660da4
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author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 19:59:18 +0100 |
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children | 319860ae697a |
rev | line source |
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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 import java.util.*; |
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26 |
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27 import com.sun.cri.ci.CiCallingConvention.Type; |
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28 import com.sun.cri.ci.CiRegister.RegisterFlag; |
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29 import com.sun.cri.ri.*; |
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30 |
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31 /** |
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32 * A default implementation of {@link RiRegisterConfig}. |
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33 */ |
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34 public class CiRegisterConfig implements RiRegisterConfig { |
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35 |
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36 /** |
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37 * The object describing the callee save area of this register configuration. |
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38 */ |
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39 public CiCalleeSaveLayout csl; |
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40 |
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41 /** |
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42 * The minimum register role identifier. |
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43 */ |
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44 public final int minRole; |
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45 |
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46 /** |
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47 * The map from register role IDs to registers. |
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48 */ |
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49 public final CiRegister[] registersRoleMap; |
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50 |
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51 /** |
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52 * The set of registers that can be used by the register allocator. |
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53 */ |
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54 public final CiRegister[] allocatable; |
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55 |
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56 /** |
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57 * The set of registers that can be used by the register allocator, |
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58 * {@linkplain CiRegister#categorize(CiRegister[]) categorized} by register |
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59 * {@linkplain RegisterFlag flags}. |
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60 */ |
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61 public final EnumMap<RegisterFlag, CiRegister[]> categorized; |
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62 |
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63 /** |
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64 * The ordered set of registers used to pass integral arguments. |
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65 */ |
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66 public final CiRegister[] cpuParameters; |
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67 |
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68 /** |
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69 * The ordered set of registers used to pass floating point arguments. |
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70 */ |
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71 public final CiRegister[] fpuParameters; |
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72 |
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73 /** |
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74 * The caller saved registers. |
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75 */ |
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76 public final CiRegister[] callerSave; |
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77 |
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78 /** |
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79 * The register to which {@link CiRegister#Frame} and {@link CiRegister#CallerFrame} are bound. |
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80 */ |
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81 public final CiRegister frame; |
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82 |
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83 /** |
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84 * Register for returning an integral value. |
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85 */ |
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86 public final CiRegister integralReturn; |
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87 |
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88 /** |
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89 * Register for returning a floating point value. |
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90 */ |
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91 public final CiRegister floatingPointReturn; |
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92 |
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93 /** |
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94 * The map from register {@linkplain CiRegister#number numbers} to register |
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95 * {@linkplain RiRegisterAttributes attributes} for this register configuration. |
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96 */ |
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97 public final RiRegisterAttributes[] attributesMap; |
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98 |
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99 /** |
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100 * The scratch register. |
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101 */ |
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102 public final CiRegister scratch; |
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103 |
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104 /** |
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105 * The frame offset of the first stack argument for each calling convention {@link CiCallingConvention.Type}. |
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106 */ |
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107 public final int[] stackArg0Offsets = new int[CiCallingConvention.Type.VALUES.length]; |
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108 |
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109 public CiRegisterConfig( |
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110 CiRegister frame, |
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111 CiRegister integralReturn, |
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112 CiRegister floatingPointReturn, |
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113 CiRegister scratch, |
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114 CiRegister[] allocatable, |
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115 CiRegister[] callerSave, |
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116 CiRegister[] parameters, |
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117 CiCalleeSaveLayout csl, |
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118 CiRegister[] allRegisters, |
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119 Map<Integer, CiRegister> roles) { |
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120 this.frame = frame; |
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121 this.csl = csl; |
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122 this.allocatable = allocatable; |
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123 this.callerSave = callerSave; |
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124 assert !Arrays.asList(allocatable).contains(scratch); |
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125 this.scratch = scratch; |
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126 EnumMap<RegisterFlag, CiRegister[]> categorizedParameters = CiRegister.categorize(parameters); |
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127 this.cpuParameters = categorizedParameters.get(RegisterFlag.CPU); |
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128 this.fpuParameters = categorizedParameters.get(RegisterFlag.FPU); |
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129 categorized = CiRegister.categorize(allocatable); |
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130 attributesMap = RiRegisterAttributes.createMap(this, allRegisters); |
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131 this.floatingPointReturn = floatingPointReturn; |
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132 this.integralReturn = integralReturn; |
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133 int minRoleId = Integer.MAX_VALUE; |
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134 int maxRoleId = Integer.MIN_VALUE; |
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135 for (Map.Entry<Integer, CiRegister> e : roles.entrySet()) { |
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136 int id = e.getKey(); |
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137 assert id >= 0; |
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138 if (minRoleId > id) { |
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139 minRoleId = id; |
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140 } |
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141 if (maxRoleId < id) { |
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142 maxRoleId = id; |
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143 } |
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144 } |
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145 registersRoleMap = new CiRegister[(maxRoleId - minRoleId) + 1]; |
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146 for (Map.Entry<Integer, CiRegister> e : roles.entrySet()) { |
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147 int id = e.getKey(); |
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148 registersRoleMap[id] = e.getValue(); |
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149 } |
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150 minRole = minRoleId; |
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151 } |
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152 |
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153 public CiRegisterConfig(CiRegisterConfig src, CiCalleeSaveLayout csl) { |
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154 this.frame = src.frame; |
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155 this.csl = csl; |
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156 this.allocatable = src.allocatable; |
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157 this.callerSave = src.callerSave; |
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158 this.scratch = src.scratch; |
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159 this.cpuParameters = src.cpuParameters; |
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160 this.fpuParameters = src.fpuParameters; |
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161 this.categorized = src.categorized; |
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162 this.attributesMap = src.attributesMap; |
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163 this.floatingPointReturn = src.floatingPointReturn; |
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164 this.integralReturn = src.integralReturn; |
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165 this.registersRoleMap = src.registersRoleMap; |
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166 this.minRole = src.minRole; |
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167 System.arraycopy(src.stackArg0Offsets, 0, stackArg0Offsets, 0, stackArg0Offsets.length); |
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168 } |
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169 |
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170 public CiRegister getReturnRegister(CiKind kind) { |
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171 if (kind.isDouble() || kind.isFloat()) { |
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172 return floatingPointReturn; |
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173 } |
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174 return integralReturn; |
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175 } |
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176 |
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177 public CiRegister getFrameRegister() { |
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178 return frame; |
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179 } |
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180 |
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181 public CiRegister getScratchRegister() { |
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182 return scratch; |
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183 } |
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184 |
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185 /** |
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186 * {@inheritDoc} |
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187 * |
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188 * This implementation assigns all available registers to parameters before assigning |
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189 * any stack slots to parameters. |
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190 */ |
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191 public CiCallingConvention getCallingConvention(Type type, CiKind[] parameters, CiTarget target, boolean stackOnly) { |
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192 CiValue[] locations = new CiValue[parameters.length]; |
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193 |
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194 int currentGeneral = 0; |
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195 int currentXMM = 0; |
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196 int firstStackIndex = (stackArg0Offsets[type.ordinal()]) / target.spillSlotSize; |
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197 int currentStackIndex = firstStackIndex; |
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198 |
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199 for (int i = 0; i < parameters.length; i++) { |
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200 final CiKind kind = parameters[i]; |
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201 |
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202 switch (kind) { |
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203 case Byte: |
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204 case Boolean: |
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205 case Short: |
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206 case Char: |
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207 case Int: |
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208 case Long: |
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209 case Object: |
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210 if (!stackOnly && currentGeneral < cpuParameters.length) { |
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211 CiRegister register = cpuParameters[currentGeneral++]; |
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212 locations[i] = register.asValue(kind); |
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213 } |
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214 break; |
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215 |
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216 case Float: |
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217 case Double: |
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218 if (!stackOnly && currentXMM < fpuParameters.length) { |
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219 CiRegister register = fpuParameters[currentXMM++]; |
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220 locations[i] = register.asValue(kind); |
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221 } |
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222 break; |
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223 |
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224 default: |
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225 throw new InternalError("Unexpected parameter kind: " + kind); |
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|
226 } |
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227 |
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|
228 if (locations[i] == null) { |
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229 locations[i] = CiStackSlot.get(kind.stackKind(), currentStackIndex, !type.out); |
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230 currentStackIndex += target.spillSlots(kind); |
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|
231 } |
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|
232 } |
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|
233 |
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234 return new CiCallingConvention(locations, (currentStackIndex - firstStackIndex) * target.spillSlotSize); |
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|
235 } |
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236 |
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|
237 public CiRegister[] getCallingConventionRegisters(Type type, RegisterFlag flag) { |
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238 if (flag == RegisterFlag.CPU) { |
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|
239 return cpuParameters; |
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|
240 } |
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|
241 assert flag == RegisterFlag.FPU; |
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|
242 return fpuParameters; |
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|
243 } |
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244 |
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|
245 public CiRegister[] getAllocatableRegisters() { |
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246 return allocatable; |
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|
247 } |
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248 |
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249 public EnumMap<RegisterFlag, CiRegister[]> getCategorizedAllocatableRegisters() { |
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|
250 return categorized; |
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|
251 } |
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|
252 |
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253 public CiRegister[] getCallerSaveRegisters() { |
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254 return callerSave; |
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255 } |
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256 |
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257 public CiCalleeSaveLayout getCalleeSaveLayout() { |
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258 return csl; |
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259 } |
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260 |
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261 public RiRegisterAttributes[] getAttributesMap() { |
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262 return attributesMap; |
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263 } |
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264 |
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265 public CiRegister getRegisterForRole(int id) { |
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266 return registersRoleMap[id - minRole]; |
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267 } |
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268 |
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269 @Override |
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270 public String toString() { |
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271 StringBuilder roleMap = new StringBuilder(); |
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272 for (int i = 0; i < registersRoleMap.length; ++i) { |
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273 CiRegister reg = registersRoleMap[i]; |
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274 if (reg != null) { |
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275 if (roleMap.length() != 0) { |
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276 roleMap.append(", "); |
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277 } |
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278 roleMap.append(i + minRole).append(" -> ").append(reg); |
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279 } |
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280 } |
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281 StringBuilder stackArg0OffsetsMap = new StringBuilder(); |
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282 for (Type t : Type.VALUES) { |
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283 if (stackArg0OffsetsMap.length() != 0) { |
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284 stackArg0OffsetsMap.append(", "); |
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285 } |
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286 stackArg0OffsetsMap.append(t).append(" -> ").append(stackArg0Offsets[t.ordinal()]); |
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287 } |
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288 String res = String.format( |
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289 "Allocatable: " + Arrays.toString(getAllocatableRegisters()) + "%n" + |
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290 "CallerSave: " + Arrays.toString(getCallerSaveRegisters()) + "%n" + |
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291 "CalleeSave: " + getCalleeSaveLayout() + "%n" + |
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292 "CPU Params: " + Arrays.toString(cpuParameters) + "%n" + |
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293 "FPU Params: " + Arrays.toString(fpuParameters) + "%n" + |
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294 "VMRoles: " + roleMap + "%n" + |
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295 "stackArg0: " + stackArg0OffsetsMap + "%n" + |
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296 "Scratch: " + getScratchRegister() + "%n"); |
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297 return res; |
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298 } |
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299 } |