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annotate graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotCompare.java @ 18662:c9d57a5fb655

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Added PIC support for metaspace access
author adlertz
date Thu, 11 Dec 2014 19:35:25 +0100
parents 7acff34abbf7
children 8fc336a04d77
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2014, 2014, 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.hotspot.amd64;
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24
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25 import static com.oracle.graal.api.code.ValueUtil.*;
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26 import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*;
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27
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28 import com.oracle.graal.hotspot.HotSpotGraalRuntime;
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29 import com.oracle.graal.api.meta.*;
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30 import com.oracle.graal.asm.*;
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31 import com.oracle.graal.asm.amd64.*;
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32 import com.oracle.graal.compiler.common.*;
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33 import com.oracle.graal.hotspot.meta.*;
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34 import com.oracle.graal.lir.*;
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35 import com.oracle.graal.lir.amd64.*;
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36 import com.oracle.graal.lir.amd64.AMD64Move.MemOp;
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37 import com.oracle.graal.lir.asm.*;
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38
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39 public class AMD64HotSpotCompare {
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40
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41 @Opcode("CMP")
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42 public static class HotSpotCompareConstantOp extends AMD64LIRInstruction {
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43
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44 @Use({REG}) protected AllocatableValue x;
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45 protected JavaConstant y;
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46
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47 public HotSpotCompareConstantOp(AllocatableValue x, JavaConstant y) {
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48 this.x = x;
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49 this.y = y;
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50 }
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51
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52 @Override
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53 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
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54 assert isRegister(x);
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55 if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(y)) {
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56 // compressed null
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57 masm.testl(asRegister(x), asRegister(x));
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58 } else if (y instanceof HotSpotObjectConstant) {
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59 HotSpotObjectConstant yConst = (HotSpotObjectConstant) y;
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60 if (yConst.isCompressed()) {
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61 // compressed oop
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62 crb.recordInlineDataInCode(y);
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63 masm.cmpl(asRegister(x), 0xDEADDEAD);
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64 } else {
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65 // uncompressed oop
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66 AMD64Address patch = (AMD64Address) crb.recordDataReferenceInCode(y, 8);
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67 masm.cmpq(asRegister(x), patch);
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68 }
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69 } else if (y instanceof HotSpotMetaspaceConstant) {
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70 boolean isImmutable = GraalOptions.ImmutableCode.getValue();
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71 boolean generatePIC = GraalOptions.GeneratePIC.getValue();
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72 if (y.getKind() == Kind.Int) {
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73 // compressed metaspace pointer
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74 crb.recordInlineDataInCode(y);
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75 if (isImmutable && generatePIC) {
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76 Kind hostWordKind = HotSpotGraalRuntime.getHostWordKind();
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77 int alignment = hostWordKind.getBitCount() / Byte.SIZE;
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78 // recordDataReferenceInCode forces the mov to be rip-relative
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79 masm.cmpl(asRegister(x), (AMD64Address) crb.recordDataReferenceInCode(JavaConstant.INT_0, alignment));
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80 } else {
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81 masm.cmpl(asRegister(x), y.asInt());
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82 }
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83 } else {
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84 // uncompressed metaspace pointer
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85 if (isImmutable && generatePIC) {
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86 crb.recordInlineDataInCode(y);
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87 Kind hostWordKind = HotSpotGraalRuntime.getHostWordKind();
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88 int alignment = hostWordKind.getBitCount() / Byte.SIZE;
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89 // recordDataReferenceInCode forces the mov to be rip-relative
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90 masm.cmpq(asRegister(x), (AMD64Address) crb.recordDataReferenceInCode(JavaConstant.INT_0, alignment));
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91 } else {
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92 AMD64Address patch = (AMD64Address) crb.recordDataReferenceInCode(y, 8);
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93 masm.cmpq(asRegister(x), patch);
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94 }
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95 }
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96 } else {
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97 throw GraalInternalError.shouldNotReachHere();
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98 }
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99 }
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100 }
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101
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102 @Opcode("CMP")
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103 public static class HotSpotCompareMemoryConstantOp extends MemOp {
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104
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105 protected JavaConstant y;
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106
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107 public HotSpotCompareMemoryConstantOp(Kind kind, AMD64AddressValue x, JavaConstant y, LIRFrameState state) {
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108 super(kind, x, state);
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109 this.y = y;
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110 }
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111
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112 @Override
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113 protected void emitMemAccess(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
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114 if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(y)) {
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115 // compressed null
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116 masm.cmpl(address.toAddress(), 0);
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117 } else if (y instanceof HotSpotObjectConstant) {
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118 HotSpotObjectConstant yConst = (HotSpotObjectConstant) y;
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119 if (yConst.isCompressed() && crb.target.inlineObjects) {
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120 // compressed oop
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121 crb.recordInlineDataInCode(y);
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122 masm.cmpl(address.toAddress(), 0xDEADDEAD);
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123 } else {
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124 // uncompressed oop
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125 throw GraalInternalError.shouldNotReachHere();
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126 }
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127 } else if (y instanceof HotSpotMetaspaceConstant) {
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128 if (y.getKind() == Kind.Int) {
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129 // compressed metaspace pointer
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130 crb.recordInlineDataInCode(y);
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131 masm.cmpl(address.toAddress(), y.asInt());
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132 } else if (y.getKind() == Kind.Long && NumUtil.is32bit(y.asLong())) {
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133 // uncompressed metaspace pointer
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134 crb.recordInlineDataInCode(y);
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135 masm.cmpq(address.toAddress(), (int) y.asLong());
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136 } else {
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137 throw GraalInternalError.shouldNotReachHere();
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138 }
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139 } else {
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140 throw GraalInternalError.shouldNotReachHere();
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141 }
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142 }
79a0d9065849 Support direct comparison of compressed pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff changeset
143 }
79a0d9065849 Support direct comparison of compressed pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff changeset
144
79a0d9065849 Support direct comparison of compressed pointers.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff changeset
145 }