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annotate graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/RegisterConfig.java @ 7530:5e3d1a68664e

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applied mx eclipseformat to all Java files
author Doug Simon <doug.simon@oracle.com>
date Wed, 23 Jan 2013 16:34:57 +0100
parents 2912b72d840a
children c63d0033f8e7
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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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23 package com.oracle.graal.api.code;
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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.oracle.graal.api.code.CallingConvention.*;
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28 import com.oracle.graal.api.code.Register.*;
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29 import com.oracle.graal.api.meta.*;
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31 /**
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32 * A register configuration binds roles and {@linkplain RegisterAttributes attributes} to physical
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33 * registers.
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34 */
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35 public interface RegisterConfig {
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36
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37 /**
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38 * Gets the register to be used for returning a value of a given kind.
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39 */
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40 Register getReturnRegister(Kind kind);
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41
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42 /**
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43 * Gets the register to which {@link Register#Frame} and {@link Register#CallerFrame} are bound.
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44 */
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45 Register getFrameRegister();
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46
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47 Register getScratchRegister();
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48
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49 /**
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50 * Gets the calling convention describing how arguments are passed.
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51 *
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52 * @param type the type of calling convention being requested
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53 * @param returnType the return type (can be null for methods returning {@code void})
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54 * @param parameterTypes the types of the arguments of the call
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55 * @param target the target platform
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56 * @param stackOnly ignore registers
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57 */
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58 CallingConvention getCallingConvention(Type type, JavaType returnType, JavaType[] parameterTypes, TargetDescription target, boolean stackOnly);
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59
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60 /**
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61 * Gets the ordered set of registers that are can be used to pass parameters according to a
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62 * given calling convention.
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63 *
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64 * @param type the type of calling convention
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65 * @param flag specifies whether registers for {@linkplain RegisterFlag#CPU integral} or
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66 * {@linkplain RegisterFlag#FPU floating point} parameters are being requested
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67 * @return the ordered set of registers that may be used to pass parameters in a call conforming
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68 * to {@code type}
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69 */
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70 Register[] getCallingConventionRegisters(Type type, RegisterFlag flag);
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71
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72 /**
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73 * Gets the set of registers that can be used by the register allocator.
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74 */
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75 Register[] getAllocatableRegisters();
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76
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77 /**
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78 * Gets the set of registers that can be used by the register allocator,
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79 * {@linkplain Register#categorize(Register[]) categorized} by register
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80 * {@linkplain RegisterFlag flags}.
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81 *
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82 * @return a map from each {@link RegisterFlag} constant to the list of
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83 * {@linkplain #getAllocatableRegisters() allocatable} registers for which the flag is
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84 * set
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85 *
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86 */
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87 EnumMap<RegisterFlag, Register[]> getCategorizedAllocatableRegisters();
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88
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89 /**
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90 * Gets the registers whose values must be preserved by a method across any call it makes.
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91 */
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92 Register[] getCallerSaveRegisters();
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93
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94 /**
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95 * Gets the layout of the callee save area of this register configuration.
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96 *
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97 * @return {@code null} if there is no callee save area
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98 */
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99 CalleeSaveLayout getCalleeSaveLayout();
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100
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101 /**
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102 * Gets a map from register {@linkplain Register#number numbers} to register
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103 * {@linkplain RegisterAttributes attributes} for this register configuration.
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104 *
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105 * @return an array where an element at index i holds the attributes of the register whose
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106 * number is i
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107 * @see Register#categorize(Register[])
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108 */
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109 RegisterAttributes[] getAttributesMap();
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110
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111 /**
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112 * Gets the register corresponding to a runtime-defined role.
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113 *
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114 * @param id the identifier of a runtime-defined register role
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115 * @return the register playing the role specified by {@code id}
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116 */
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117 Register getRegisterForRole(int id);
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118 }