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annotate graal/com.oracle.jvmci.asm.sparc/src/com/oracle/jvmci/asm/sparc/SPARCAddress.java @ 21708:6df25b1418be

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moved com.oracle.asm.** to jvmci-util.jar (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Wed, 03 Jun 2015 18:06:44 +0200
parents graal/com.oracle.graal.asm.sparc/src/com/oracle/graal/asm/sparc/SPARCAddress.java@5024c80224c7
children
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1 /*
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2 * Copyright (c) 2013, 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.asm.sparc;
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24
5024c80224c7 moved com.oracle.graal.[amd64|sparc] to com.oracle.jvmci.[amd64|sparc] (JBS:GRAAL-53)
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25 import static com.oracle.jvmci.sparc.SPARC.*;
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26
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27 import com.oracle.jvmci.code.*;
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28 import com.oracle.jvmci.sparc.*;
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29
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30 public class SPARCAddress extends AbstractAddress {
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31
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32 private final Register base;
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33 private final Register index;
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34 private final int displacement;
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35
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36 /**
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37 * Creates an {@link SPARCAddress} with given base register, no scaling and a given
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38 * displacement.
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39 *
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40 * @param base the base register
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41 * @param displacement the displacement
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42 */
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43 public SPARCAddress(Register base, int displacement) {
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44 this.base = base;
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45 this.index = Register.None;
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46 this.displacement = displacement;
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47 }
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48
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49 /**
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50 * Creates an {@link SPARCAddress} with given base register, no scaling and a given index.
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51 *
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52 * @param base the base register
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53 * @param index the index register
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54 */
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55 public SPARCAddress(Register base, Register index) {
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56 this.base = base;
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57 this.index = index;
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58 this.displacement = 0;
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59 }
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60
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61 @Override
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62 public String toString() {
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63 StringBuilder s = new StringBuilder();
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64 s.append("[");
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65 String sep = "";
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66 if (!getBase().equals(Register.None)) {
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67 s.append(getBase());
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68 sep = " + ";
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69 }
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70 if (!getIndex().equals(Register.None)) {
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71 s.append(sep).append(getIndex());
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72 sep = " + ";
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73 } else {
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74 if (getDisplacement() < 0) {
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75 s.append(" - ").append(-getDisplacement());
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76 } else if (getDisplacement() > 0) {
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77 s.append(sep).append(getDisplacement());
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78 }
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79 }
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80 s.append("]");
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81 return s.toString();
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82 }
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83
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84 /**
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85 * @return Base register that defines the start of the address computation. If not present, is
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86 * denoted by {@link Register#None}.
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87 */
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88 public Register getBase() {
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89 return base;
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90 }
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91
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92 /**
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93 * @return Index register, the value of which is added to {@link #getBase}. If not present, is
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94 * denoted by {@link Register#None}.
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95 */
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96 public Register getIndex() {
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97 return index;
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98 }
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99
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100 /**
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101 * @return true if this address has an index register
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102 */
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103 public boolean hasIndex() {
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104 return !getIndex().equals(Register.None);
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105 }
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106
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107 /**
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108 * This method adds the stack-bias to the displacement if the base register is either
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109 * {@link SPARC#sp} or {@link SPARC#fp}.
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110 *
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111 * @return Optional additive displacement.
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112 */
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113 public int getDisplacement() {
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114 if (hasIndex()) {
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115 throw new InternalError("address has index register");
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116 }
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117 // TODO Should we also hide the register save area size here?
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118 if (getBase().equals(sp) || getBase().equals(fp)) {
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119 return displacement + STACK_BIAS;
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120 }
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121 return displacement;
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122 }
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123 }