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annotate graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/CallingConvention.java @ 21556:48c1ebd24120

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renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Wed, 27 May 2015 00:36:16 +0200
parents graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/CallingConvention.java@1cde96b96673
children f5b549811bac
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1 /*
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2 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.jvmci.code;
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24
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25 import com.oracle.jvmci.meta.Value;
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26 import com.oracle.jvmci.meta.AllocatableValue;
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27 import static com.oracle.jvmci.code.ValueUtil.*;
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28
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29
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30 /**
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31 * A calling convention describes the locations in which the arguments for a call are placed and the
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32 * location in which the return value is placed if the call is not void.
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33 */
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34 public class CallingConvention {
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35
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36 /**
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37 * Constants denoting the type of a call for which a calling convention is requested.
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38 */
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39 public enum Type {
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40 /**
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41 * A request for the outgoing argument locations at a call site to Java code.
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42 */
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43 JavaCall(true),
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44
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45 /**
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46 * A request for the incoming argument locations.
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47 */
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48 JavaCallee(false),
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49
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50 /**
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51 * A request for the outgoing argument locations at a call site to external native code that
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52 * complies with the platform ABI.
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53 */
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54 NativeCall(true);
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55
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56 /**
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57 * Determines if this is a request for the outgoing argument locations at a call site.
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58 */
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59 public final boolean out;
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60
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61 public static final Type[] VALUES = values();
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62
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63 private Type(boolean out) {
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64 this.out = out;
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65 }
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66 }
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67
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68 /**
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69 * The amount of stack space (in bytes) required for the stack-based arguments of the call.
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70 */
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71 private final int stackSize;
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72
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73 private final AllocatableValue returnLocation;
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74
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75 /**
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76 * The ordered locations in which the arguments are placed.
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77 */
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78 private final AllocatableValue[] argumentLocations;
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79
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80 /**
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81 * Creates a description of the registers and stack locations used by a call.
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82 *
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83 * @param stackSize amount of stack space (in bytes) required for the stack-based arguments of
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84 * the call
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85 * @param returnLocation the location for the return value or {@link Value#ILLEGAL} if a void
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86 * call
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87 * @param argumentLocations the ordered locations in which the arguments are placed
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88 */
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89 public CallingConvention(int stackSize, AllocatableValue returnLocation, AllocatableValue... argumentLocations) {
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90 assert argumentLocations != null;
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91 assert returnLocation != null;
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92 this.argumentLocations = argumentLocations;
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93 this.stackSize = stackSize;
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94 this.returnLocation = returnLocation;
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95 assert verify();
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96 }
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97
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98 /**
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99 * Gets the location for the return value or {@link Value#ILLEGAL} if a void call.
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100 */
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101 public AllocatableValue getReturn() {
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102 return returnLocation;
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103 }
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104
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105 /**
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106 * Gets the location for the {@code index}'th argument.
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107 */
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108 public AllocatableValue getArgument(int index) {
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109 return argumentLocations[index];
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110 }
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111
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112 /**
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113 * Gets the amount of stack space (in bytes) required for the stack-based arguments of the call.
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114 */
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115 public int getStackSize() {
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116 return stackSize;
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117 }
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118
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119 /**
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120 * Gets the number of locations required for the arguments.
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121 */
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122 public int getArgumentCount() {
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123 return argumentLocations.length;
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124 }
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125
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126 /**
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127 * Gets the locations required for the arguments.
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128 */
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129 public AllocatableValue[] getArguments() {
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130 if (argumentLocations.length == 0) {
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131 return argumentLocations;
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132 }
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133 return argumentLocations.clone();
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134 }
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135
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136 @Override
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137 public String toString() {
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138 StringBuilder sb = new StringBuilder();
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139 sb.append("CallingConvention[");
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140 String sep = "";
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141 for (Value op : argumentLocations) {
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142 sb.append(sep).append(op);
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143 sep = ", ";
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144 }
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Bernhard Urban <bernhard.urban@jku.at>
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145 if (!returnLocation.equals(Value.ILLEGAL)) {
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146 sb.append(" -> ").append(returnLocation);
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147 }
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148 sb.append("]");
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149 return sb.toString();
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150 }
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151
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152 private boolean verify() {
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153 for (int i = 0; i < argumentLocations.length; i++) {
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154 Value location = argumentLocations[i];
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b04b94b71649 Finished PTX assembler and Register -> Variable conversion
Morris Meyer <morris.meyer@oracle.com>
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155 assert isStackSlot(location) || isAllocatableValue(location);
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156 }
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157 return true;
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158 }
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159 }