Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.hotspot.amd64/src/jdk/vm/ci/hotspot/amd64/AMD64HotSpotRegisterConfig.java @ 23700:9e1235406b59
[Findbugs] various warnings reported for JVMCI sources (JDK-8159613)
author | Doug Simon <doug.simon@oracle.com> |
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date | Sat, 18 Jun 2016 13:19:01 +0200 |
parents | b5557b757040 |
children | fec2e64c06a8 |
rev | line source |
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1 /* |
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2 * Copyright (c) 2011, 2016, 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 jdk.vm.ci.hotspot.amd64; |
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24 |
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25 import static jdk.vm.ci.amd64.AMD64.r12; |
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26 import static jdk.vm.ci.amd64.AMD64.r15; |
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27 import static jdk.vm.ci.amd64.AMD64.r8; |
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28 import static jdk.vm.ci.amd64.AMD64.r9; |
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29 import static jdk.vm.ci.amd64.AMD64.rax; |
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30 import static jdk.vm.ci.amd64.AMD64.rcx; |
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31 import static jdk.vm.ci.amd64.AMD64.rdi; |
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32 import static jdk.vm.ci.amd64.AMD64.rdx; |
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33 import static jdk.vm.ci.amd64.AMD64.rsi; |
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34 import static jdk.vm.ci.amd64.AMD64.rsp; |
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35 import static jdk.vm.ci.amd64.AMD64.xmm0; |
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36 import static jdk.vm.ci.amd64.AMD64.xmm1; |
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37 import static jdk.vm.ci.amd64.AMD64.xmm2; |
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38 import static jdk.vm.ci.amd64.AMD64.xmm3; |
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39 import static jdk.vm.ci.amd64.AMD64.xmm4; |
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40 import static jdk.vm.ci.amd64.AMD64.xmm5; |
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41 import static jdk.vm.ci.amd64.AMD64.xmm6; |
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42 import static jdk.vm.ci.amd64.AMD64.xmm7; |
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43 |
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44 import java.util.ArrayList; |
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45 import java.util.HashSet; |
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46 import java.util.List; |
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47 import java.util.Set; |
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48 |
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49 import jdk.vm.ci.code.Architecture; |
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50 import jdk.vm.ci.code.CallingConvention; |
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51 import jdk.vm.ci.code.CallingConvention.Type; |
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52 import jdk.vm.ci.code.Register; |
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53 import jdk.vm.ci.code.RegisterArray; |
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54 import jdk.vm.ci.code.RegisterAttributes; |
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55 import jdk.vm.ci.code.RegisterConfig; |
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56 import jdk.vm.ci.code.StackSlot; |
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57 import jdk.vm.ci.code.TargetDescription; |
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58 import jdk.vm.ci.code.ValueKindFactory; |
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59 import jdk.vm.ci.common.JVMCIError; |
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60 import jdk.vm.ci.hotspot.HotSpotCallingConventionType; |
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61 import jdk.vm.ci.meta.AllocatableValue; |
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62 import jdk.vm.ci.meta.JavaKind; |
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63 import jdk.vm.ci.meta.JavaType; |
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64 import jdk.vm.ci.meta.PlatformKind; |
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65 import jdk.vm.ci.meta.Value; |
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66 import jdk.vm.ci.meta.ValueKind; |
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67 |
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68 public class AMD64HotSpotRegisterConfig implements RegisterConfig { |
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69 |
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70 private final TargetDescription target; |
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71 |
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72 private final RegisterArray allocatable; |
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73 |
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74 /** |
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75 * The caller saved registers always include all parameter registers. |
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76 */ |
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77 private final RegisterArray callerSaved; |
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78 |
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79 private final boolean allAllocatableAreCallerSaved; |
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80 |
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81 private final RegisterAttributes[] attributesMap; |
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82 |
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83 @Override |
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84 public RegisterArray getAllocatableRegisters() { |
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85 return allocatable; |
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86 } |
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87 |
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88 @Override |
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89 public RegisterArray filterAllocatableRegisters(PlatformKind kind, RegisterArray registers) { |
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90 ArrayList<Register> list = new ArrayList<>(); |
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91 for (Register reg : registers) { |
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92 if (target.arch.canStoreValue(reg.getRegisterCategory(), kind)) { |
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93 list.add(reg); |
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94 } |
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95 } |
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96 |
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97 RegisterArray ret = new RegisterArray(list); |
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98 return ret; |
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99 } |
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100 |
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101 @Override |
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102 public RegisterAttributes[] getAttributesMap() { |
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103 return attributesMap.clone(); |
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104 } |
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105 |
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106 private final RegisterArray javaGeneralParameterRegisters; |
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107 private final RegisterArray nativeGeneralParameterRegisters; |
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108 private final RegisterArray xmmParameterRegisters = new RegisterArray(xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7); |
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109 |
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110 /* |
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111 * Some ABIs (e.g. Windows) require a so-called "home space", that is a save area on the stack |
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112 * to store the argument registers |
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113 */ |
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114 private final boolean needsNativeStackHomeSpace; |
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115 |
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116 private static final RegisterArray reservedRegisters = new RegisterArray(rsp, r15); |
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117 |
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118 private static RegisterArray initAllocatable(Architecture arch, boolean reserveForHeapBase) { |
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119 RegisterArray allRegisters = arch.getAvailableValueRegisters(); |
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120 Register[] registers = new Register[allRegisters.size() - reservedRegisters.size() - (reserveForHeapBase ? 1 : 0)]; |
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121 List<Register> reservedRegistersList = reservedRegisters.asList(); |
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122 |
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123 int idx = 0; |
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124 for (Register reg : allRegisters) { |
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125 if (reservedRegistersList.contains(reg)) { |
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126 // skip reserved registers |
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127 continue; |
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128 } |
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129 if (reserveForHeapBase && reg.equals(r12)) { |
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130 // skip heap base register |
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131 continue; |
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132 } |
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133 |
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134 registers[idx++] = reg; |
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135 } |
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136 |
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137 assert idx == registers.length; |
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138 return new RegisterArray(registers); |
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139 } |
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140 |
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141 public AMD64HotSpotRegisterConfig(TargetDescription target, boolean useCompressedOops, boolean windowsOs) { |
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142 this(target, initAllocatable(target.arch, useCompressedOops), windowsOs); |
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143 assert callerSaved.size() >= allocatable.size(); |
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144 } |
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145 |
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146 public AMD64HotSpotRegisterConfig(TargetDescription target, RegisterArray allocatable, boolean windowsOs) { |
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147 this.target = target; |
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148 |
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149 if (windowsOs) { |
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150 javaGeneralParameterRegisters = new RegisterArray(rdx, r8, r9, rdi, rsi, rcx); |
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151 nativeGeneralParameterRegisters = new RegisterArray(rcx, rdx, r8, r9); |
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152 this.needsNativeStackHomeSpace = true; |
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153 } else { |
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154 javaGeneralParameterRegisters = new RegisterArray(rsi, rdx, rcx, r8, r9, rdi); |
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155 nativeGeneralParameterRegisters = new RegisterArray(rdi, rsi, rdx, rcx, r8, r9); |
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156 this.needsNativeStackHomeSpace = false; |
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157 } |
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158 |
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159 this.allocatable = allocatable; |
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160 Set<Register> callerSaveSet = new HashSet<>(); |
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161 allocatable.addTo(callerSaveSet); |
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162 xmmParameterRegisters.addTo(callerSaveSet); |
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163 callerSaveSet.addAll(javaGeneralParameterRegisters.asList()); |
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164 nativeGeneralParameterRegisters.addTo(callerSaveSet); |
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165 callerSaved = new RegisterArray(callerSaveSet); |
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166 |
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167 allAllocatableAreCallerSaved = true; |
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168 attributesMap = RegisterAttributes.createMap(this, target.arch.getRegisters()); |
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169 } |
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170 |
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171 @Override |
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172 public RegisterArray getCallerSaveRegisters() { |
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173 return callerSaved; |
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174 } |
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175 |
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176 @Override |
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177 public RegisterArray getCalleeSaveRegisters() { |
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178 return null; |
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179 } |
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180 |
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181 @Override |
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182 public boolean areAllAllocatableRegistersCallerSaved() { |
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183 return allAllocatableAreCallerSaved; |
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184 } |
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185 |
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186 @Override |
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187 public CallingConvention getCallingConvention(Type type, JavaType returnType, JavaType[] parameterTypes, ValueKindFactory<?> valueKindFactory) { |
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188 HotSpotCallingConventionType hotspotType = (HotSpotCallingConventionType) type; |
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189 if (type == HotSpotCallingConventionType.NativeCall) { |
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190 return callingConvention(nativeGeneralParameterRegisters, returnType, parameterTypes, hotspotType, valueKindFactory); |
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191 } |
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192 // On x64, parameter locations are the same whether viewed |
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193 // from the caller or callee perspective |
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194 return callingConvention(javaGeneralParameterRegisters, returnType, parameterTypes, hotspotType, valueKindFactory); |
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195 } |
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196 |
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197 @Override |
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198 public RegisterArray getCallingConventionRegisters(Type type, JavaKind kind) { |
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199 HotSpotCallingConventionType hotspotType = (HotSpotCallingConventionType) type; |
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200 switch (kind) { |
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201 case Boolean: |
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202 case Byte: |
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203 case Short: |
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204 case Char: |
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205 case Int: |
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206 case Long: |
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207 case Object: |
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208 return hotspotType == HotSpotCallingConventionType.NativeCall ? nativeGeneralParameterRegisters : javaGeneralParameterRegisters; |
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209 case Float: |
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210 case Double: |
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211 return xmmParameterRegisters; |
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212 default: |
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|
213 throw JVMCIError.shouldNotReachHere(); |
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214 } |
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215 } |
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216 |
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217 private CallingConvention callingConvention(RegisterArray generalParameterRegisters, JavaType returnType, JavaType[] parameterTypes, HotSpotCallingConventionType type, |
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218 ValueKindFactory<?> valueKindFactory) { |
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219 AllocatableValue[] locations = new AllocatableValue[parameterTypes.length]; |
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220 |
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221 int currentGeneral = 0; |
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222 int currentXMM = 0; |
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223 int currentStackOffset = type == HotSpotCallingConventionType.NativeCall && needsNativeStackHomeSpace ? generalParameterRegisters.size() * target.wordSize : 0; |
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224 |
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More complete and reusable Word type
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225 for (int i = 0; i < parameterTypes.length; i++) { |
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226 final JavaKind kind = parameterTypes[i].getJavaKind().getStackKind(); |
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227 |
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228 switch (kind) { |
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229 case Byte: |
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230 case Boolean: |
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231 case Short: |
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232 case Char: |
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233 case Int: |
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234 case Long: |
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235 case Object: |
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236 if (currentGeneral < generalParameterRegisters.size()) { |
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237 Register register = generalParameterRegisters.get(currentGeneral++); |
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238 locations[i] = register.asValue(valueKindFactory.getValueKind(kind)); |
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239 } |
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240 break; |
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241 case Float: |
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242 case Double: |
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243 if (currentXMM < xmmParameterRegisters.size()) { |
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244 Register register = xmmParameterRegisters.get(currentXMM++); |
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245 locations[i] = register.asValue(valueKindFactory.getValueKind(kind)); |
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246 } |
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247 break; |
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248 default: |
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249 throw JVMCIError.shouldNotReachHere(); |
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250 } |
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251 |
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252 if (locations[i] == null) { |
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253 ValueKind<?> valueKind = valueKindFactory.getValueKind(kind); |
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254 locations[i] = StackSlot.get(valueKind, currentStackOffset, !type.out); |
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255 currentStackOffset += Math.max(valueKind.getPlatformKind().getSizeInBytes(), target.wordSize); |
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256 } |
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257 } |
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258 |
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259 JavaKind returnKind = returnType == null ? JavaKind.Void : returnType.getJavaKind(); |
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260 AllocatableValue returnLocation = returnKind == JavaKind.Void ? Value.ILLEGAL : getReturnRegister(returnKind).asValue(valueKindFactory.getValueKind(returnKind.getStackKind())); |
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261 return new CallingConvention(currentStackOffset, returnLocation, locations); |
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262 } |
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263 |
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264 @Override |
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265 public Register getReturnRegister(JavaKind kind) { |
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266 switch (kind) { |
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267 case Boolean: |
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268 case Byte: |
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269 case Char: |
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270 case Short: |
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271 case Int: |
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272 case Long: |
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273 case Object: |
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274 return rax; |
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275 case Float: |
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276 case Double: |
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277 return xmm0; |
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278 case Void: |
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279 case Illegal: |
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280 return null; |
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281 default: |
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282 throw new UnsupportedOperationException("no return register for type " + kind); |
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283 } |
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284 } |
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285 |
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286 @Override |
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287 public Register getFrameRegister() { |
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288 return rsp; |
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289 } |
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290 |
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291 @Override |
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292 public String toString() { |
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293 return String.format("Allocatable: " + getAllocatableRegisters() + "%n" + "CallerSave: " + getCallerSaveRegisters() + "%n"); |
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294 } |
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295 } |