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annotate graal/com.oracle.max.cri/src/com/sun/cri/ci/CiCallingConvention.java @ 3733:e233f5660da4

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Added Java files from Maxine project.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 19:59:18 +0100
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children 9e0c1b4cfef5
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3733
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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.sun.cri.ci;
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24
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25 import com.sun.cri.ri.*;
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26
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27
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28 /**
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29 * A calling convention describes the locations in which the arguments for a call are placed.
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30 */
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31 public class CiCallingConvention {
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32
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33 /**
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34 * Constants denoting the type of a call for which a calling convention is
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35 * {@linkplain RiRegisterConfig#getCallingConvention(Type, CiKind[], CiTarget, boolean) requested}.
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36 */
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37 public enum Type {
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38 /**
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39 * A request for the outgoing argument locations at a call site to Java code.
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40 */
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41 JavaCall(true),
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42
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43 /**
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44 * A request for the incoming argument locations.
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45 */
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46 JavaCallee(false),
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47
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48 /**
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49 * A request for the outgoing argument locations at a call site to the runtime (which may be Java or native code).
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50 */
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51 RuntimeCall(true),
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52
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53 /**
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54 * A request for the outgoing argument locations at a call site to
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55 * external native code that complies with the platform ABI.
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56 */
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57 NativeCall(true);
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58
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59 /**
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60 * Determines if this is a request for the outgoing argument locations at a call site.
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61 */
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62 public final boolean out;
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63
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64 public static final Type[] VALUES = values();
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65
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66 private Type(boolean out) {
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67 this.out = out;
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68 }
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69 }
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70
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71 /**
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72 * The amount of stack space (in bytes) required for the stack-based arguments of the call.
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73 */
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74 public final int stackSize;
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75
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76 /**
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77 * The locations in which the arguments are placed. This array ordered by argument index.
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78 */
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79 public final CiValue[] locations;
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80
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81 public CiCallingConvention(CiValue[] locations, int stackSize) {
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82 this.locations = locations;
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83 this.stackSize = stackSize;
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84 assert verify();
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85 }
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86
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87 @Override
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88 public String toString() {
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89 StringBuilder result = new StringBuilder();
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90 result.append("CallingConvention[");
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91 for (CiValue op : locations) {
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92 result.append(op.toString()).append(" ");
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93 }
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94 result.append("]");
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95 return result.toString();
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96 }
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97
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98 private boolean verify() {
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99 for (int i = 0; i < locations.length; i++) {
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100 CiValue location = locations[i];
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101 assert location.isStackSlot() || location.isRegister();
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102 }
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103 return true;
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104 }
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105 }