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annotate graal/com.oracle.graal.lir.amd64/src/com/oracle/graal/lir/amd64/AMD64Call.java @ 7143:445193cc2a7d

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added support for writing stubs in Java and wrote the TLAB fast refill stub
author Doug Simon <doug.simon@oracle.com>
date Fri, 07 Dec 2012 15:12:05 +0100
parents cc32ce37eddc
children ae69cd8c08a9
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1 /*
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2 * Copyright (c) 2011, 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.graal.lir.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.api.code.*;
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29 import com.oracle.graal.api.code.RuntimeCall.Descriptor;
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30 import com.oracle.graal.api.meta.*;
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31 import com.oracle.graal.asm.amd64.*;
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32 import com.oracle.graal.lir.*;
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33 import com.oracle.graal.lir.LIRInstruction.Opcode;
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34 import com.oracle.graal.lir.asm.*;
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35
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36 public class AMD64Call {
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37
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38 public static final Descriptor DEBUG = new Descriptor("debug", false, Kind.Void);
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39
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40 @Opcode("CALL_DIRECT")
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41 public static class DirectCallOp extends AMD64LIRInstruction implements StandardOp.CallOp {
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42 @Def({REG, ILLEGAL}) protected Value result;
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43 @Use({REG, STACK}) protected Value[] parameters;
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44 @Temp protected Value[] temps;
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45 @State protected LIRFrameState state;
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46
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47 protected final Object callTarget;
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48
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49 public DirectCallOp(Object callTarget, Value result, Value[] parameters, Value[] temps, LIRFrameState state) {
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50 this.callTarget = callTarget;
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51 this.result = result;
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52 this.parameters = parameters;
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53 this.state = state;
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54 this.temps = temps;
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55 assert temps != null;
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56 }
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57
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58 @Override
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59 public void emitCode(TargetMethodAssembler tasm, AMD64MacroAssembler masm) {
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60 emitAlignmentForDirectCall(tasm, masm);
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61 directCall(tasm, masm, callTarget, state);
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62 }
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63
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64 protected void emitAlignmentForDirectCall(TargetMethodAssembler tasm, AMD64MacroAssembler masm) {
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65 // make sure that the displacement word of the call ends up word aligned
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66 int offset = masm.codeBuffer.position();
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67 offset += tasm.target.arch.getMachineCodeCallDisplacementOffset();
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68 while (offset++ % tasm.target.wordSize != 0) {
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69 masm.nop();
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70 }
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71 }
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72 }
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73
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74 @Opcode("CALL_INDIRECT")
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75 public static class IndirectCallOp extends AMD64LIRInstruction implements StandardOp.CallOp {
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76 @Def({REG, ILLEGAL}) protected Value result;
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77 @Use({REG, STACK}) protected Value[] parameters;
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78 @Use({REG}) protected Value targetAddress;
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79 @Temp protected Value[] temps;
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80 @State protected LIRFrameState state;
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81
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82 protected final Object callTarget;
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83
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84 public IndirectCallOp(Object callTarget, Value result, Value[] parameters, Value[] temps, Value targetAddress, LIRFrameState state) {
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85 this.callTarget = callTarget;
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86 this.result = result;
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87 this.parameters = parameters;
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88 this.targetAddress = targetAddress;
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89 this.state = state;
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90 this.temps = temps;
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91 assert temps != null;
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92 }
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93
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94 @Override
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95 public void emitCode(TargetMethodAssembler tasm, AMD64MacroAssembler masm) {
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96 indirectCall(tasm, masm, asRegister(targetAddress), callTarget, state);
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97 }
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98
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99 @Override
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100 protected void verify() {
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101 super.verify();
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102 assert isRegister(targetAddress) : "The current register allocator cannot handle variables to be used at call sites, it must be in a fixed register for now";
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103 }
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104 }
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105
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106 public static void directCall(TargetMethodAssembler tasm, AMD64MacroAssembler masm, Object callTarget, LIRFrameState info) {
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107 int before = masm.codeBuffer.position();
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108 if (callTarget instanceof RuntimeCall) {
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109 long maxOffset = ((RuntimeCall) callTarget).getMaxCallTargetOffset();
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110 if (maxOffset != (int) maxOffset) {
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111 // offset might not fit a 32-bit immediate, generate an
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112 // indirect call with a 64-bit immediate
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113 Register scratch = tasm.frameMap.registerConfig.getScratchRegister();
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114 // TODO (cwimmer): we want to get rid of a generally reserved scratch register.
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115 masm.movq(scratch, 0L);
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116 masm.call(scratch);
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117 } else {
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118 masm.call();
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119 }
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120
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121 } else {
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122 masm.call();
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123 }
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124 int after = masm.codeBuffer.position();
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125 tasm.recordDirectCall(before, after, tasm.runtime.lookupCallTarget(callTarget), info);
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126 tasm.recordExceptionHandlers(after, info);
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127 masm.ensureUniquePC();
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128 }
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129
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130 public static void directJmp(TargetMethodAssembler tasm, AMD64MacroAssembler masm, Object target) {
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131 int before = masm.codeBuffer.position();
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132 masm.jmp(0, true);
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133 int after = masm.codeBuffer.position();
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134 tasm.recordDirectCall(before, after, tasm.runtime.lookupCallTarget(target), null);
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135 masm.ensureUniquePC();
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136 }
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137
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138 public static void indirectCall(TargetMethodAssembler tasm, AMD64MacroAssembler masm, Register dst, Object callTarget, LIRFrameState info) {
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139 int before = masm.codeBuffer.position();
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140 masm.call(dst);
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141 int after = masm.codeBuffer.position();
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142 tasm.recordIndirectCall(before, after, tasm.runtime.lookupCallTarget(callTarget), info);
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143 tasm.recordExceptionHandlers(after, info);
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144 masm.ensureUniquePC();
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145 }
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146
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147 public static void shouldNotReachHere(TargetMethodAssembler tasm, AMD64MacroAssembler masm) {
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148 boolean assertions = false;
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149 assert (assertions = true) == true;
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150
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151 if (assertions) {
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152 directCall(tasm, masm, tasm.runtime.lookupRuntimeCall(DEBUG), null);
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153 masm.hlt();
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154 }
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155 }
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156 }