annotate src/cpu/sparc/vm/c1_CodeStubs_sparc.cpp @ 2376:c7f3d0b4570f

7017732: move static fields into Class to prepare for perm gen removal Reviewed-by: kvn, coleenp, twisti, stefank
author never
date Fri, 18 Mar 2011 16:00:34 -0700
parents e4fee0bdaa85
children 32f7097f9d8f
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1 /*
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2 * Copyright (c) 1999, 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 */
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24
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25 #include "precompiled.hpp"
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26 #include "c1/c1_CodeStubs.hpp"
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27 #include "c1/c1_FrameMap.hpp"
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28 #include "c1/c1_LIRAssembler.hpp"
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29 #include "c1/c1_MacroAssembler.hpp"
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30 #include "c1/c1_Runtime1.hpp"
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31 #include "nativeInst_sparc.hpp"
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32 #include "runtime/sharedRuntime.hpp"
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33 #include "vmreg_sparc.inline.hpp"
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34 #ifndef SERIALGC
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35 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
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36 #endif
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37
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38 #define __ ce->masm()->
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39
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40 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
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41 bool throw_index_out_of_bounds_exception)
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42 : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
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43 , _index(index)
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44 {
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45 assert(info != NULL, "must have info");
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46 _info = new CodeEmitInfo(info);
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47 }
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48
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49
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50 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
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51 __ bind(_entry);
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52
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53 if (_index->is_register()) {
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54 __ mov(_index->as_register(), G4);
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55 } else {
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56 __ set(_index->as_jint(), G4);
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57 }
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58 if (_throw_index_out_of_bounds_exception) {
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59 __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type);
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60 } else {
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61 __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type);
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62 }
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63 __ delayed()->nop();
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64 ce->add_call_info_here(_info);
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65 ce->verify_oop_map(_info);
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66 #ifdef ASSERT
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67 __ should_not_reach_here();
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68 #endif
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69 }
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70
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71
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72 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
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73 __ bind(_entry);
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74 __ set(_bci, G4);
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75 __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type);
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76 __ delayed()->mov_or_nop(_method->as_register(), G5);
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77 ce->add_call_info_here(_info);
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78 ce->verify_oop_map(_info);
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79
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80 __ br(Assembler::always, true, Assembler::pt, _continuation);
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81 __ delayed()->nop();
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82 }
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83
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84
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85 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
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86 if (_offset != -1) {
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87 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
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88 }
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89 __ bind(_entry);
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90 __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type);
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91 __ delayed()->nop();
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92 ce->add_call_info_here(_info);
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93 ce->verify_oop_map(_info);
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94 #ifdef ASSERT
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95 __ should_not_reach_here();
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96 #endif
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97 }
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98
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99
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100 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
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101 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
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102 __ bind(_entry);
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103 __ call(Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id),
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104 relocInfo::runtime_call_type);
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105 __ delayed()->nop();
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106 ce->add_call_info_here(_info);
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107 ce->verify_oop_map(_info);
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108 #ifdef ASSERT
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109 __ should_not_reach_here();
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110 #endif
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111 }
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112
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113
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114 // Implementation of SimpleExceptionStub
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115 // Note: %g1 and %g3 are already in use
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116 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
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117 __ bind(_entry);
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118 __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type);
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119
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120 if (_obj->is_valid()) {
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121 __ delayed()->mov(_obj->as_register(), G4); // _obj contains the optional argument to the stub
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122 } else {
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123 __ delayed()->mov(G0, G4);
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124 }
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125 ce->add_call_info_here(_info);
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126 #ifdef ASSERT
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127 __ should_not_reach_here();
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128 #endif
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129 }
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130
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131
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132 // Implementation of NewInstanceStub
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133
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134 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
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135 _result = result;
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136 _klass = klass;
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137 _klass_reg = klass_reg;
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138 _info = new CodeEmitInfo(info);
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139 assert(stub_id == Runtime1::new_instance_id ||
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140 stub_id == Runtime1::fast_new_instance_id ||
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141 stub_id == Runtime1::fast_new_instance_init_check_id,
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142 "need new_instance id");
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143 _stub_id = stub_id;
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144 }
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145
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146
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147 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
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148 __ bind(_entry);
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149 __ call(Runtime1::entry_for(_stub_id), relocInfo::runtime_call_type);
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150 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
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151 ce->add_call_info_here(_info);
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152 ce->verify_oop_map(_info);
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153 __ br(Assembler::always, false, Assembler::pt, _continuation);
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154 __ delayed()->mov_or_nop(O0, _result->as_register());
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155 }
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156
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157
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158 // Implementation of NewTypeArrayStub
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159 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
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160 _klass_reg = klass_reg;
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161 _length = length;
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162 _result = result;
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163 _info = new CodeEmitInfo(info);
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164 }
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165
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166
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167 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
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168 __ bind(_entry);
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169
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170 __ mov(_length->as_register(), G4);
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171 __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type);
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172 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
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173 ce->add_call_info_here(_info);
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174 ce->verify_oop_map(_info);
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175 __ br(Assembler::always, false, Assembler::pt, _continuation);
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176 __ delayed()->mov_or_nop(O0, _result->as_register());
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177 }
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178
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179
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180 // Implementation of NewObjectArrayStub
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181
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182 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
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183 _klass_reg = klass_reg;
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184 _length = length;
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185 _result = result;
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186 _info = new CodeEmitInfo(info);
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187 }
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188
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189
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190 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
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191 __ bind(_entry);
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192
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193 __ mov(_length->as_register(), G4);
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194 __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type);
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195 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
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196 ce->add_call_info_here(_info);
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197 ce->verify_oop_map(_info);
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198 __ br(Assembler::always, false, Assembler::pt, _continuation);
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199 __ delayed()->mov_or_nop(O0, _result->as_register());
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200 }
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201
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202
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203 // Implementation of MonitorAccessStubs
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204 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
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205 : MonitorAccessStub(obj_reg, lock_reg) {
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206 _info = new CodeEmitInfo(info);
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207 }
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208
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209
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210 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
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211 __ bind(_entry);
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212 __ mov(_obj_reg->as_register(), G4);
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213 if (ce->compilation()->has_fpu_code()) {
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214 __ call(Runtime1::entry_for(Runtime1::monitorenter_id), relocInfo::runtime_call_type);
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215 } else {
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216 __ call(Runtime1::entry_for(Runtime1::monitorenter_nofpu_id), relocInfo::runtime_call_type);
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217 }
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218 __ delayed()->mov_or_nop(_lock_reg->as_register(), G5);
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219 ce->add_call_info_here(_info);
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220 ce->verify_oop_map(_info);
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221 __ br(Assembler::always, true, Assembler::pt, _continuation);
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222 __ delayed()->nop();
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223 }
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224
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225
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226 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
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227 __ bind(_entry);
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228 if (_compute_lock) {
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229 ce->monitor_address(_monitor_ix, _lock_reg);
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230 }
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231 if (ce->compilation()->has_fpu_code()) {
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232 __ call(Runtime1::entry_for(Runtime1::monitorexit_id), relocInfo::runtime_call_type);
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233 } else {
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234 __ call(Runtime1::entry_for(Runtime1::monitorexit_nofpu_id), relocInfo::runtime_call_type);
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235 }
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236
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237 __ delayed()->mov_or_nop(_lock_reg->as_register(), G4);
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238 __ br(Assembler::always, true, Assembler::pt, _continuation);
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239 __ delayed()->nop();
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240 }
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241
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242 // Implementation of patching:
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243 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
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244 // - Replace original code with a call to the stub
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245 // At Runtime:
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246 // - call to stub, jump to runtime
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247 // - in runtime: preserve all registers (especially objects, i.e., source and destination object)
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248 // - in runtime: after initializing class, restore original code, reexecute instruction
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249
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250 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
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251
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252 void PatchingStub::align_patch_site(MacroAssembler* ) {
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253 // patch sites on sparc are always properly aligned.
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254 }
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255
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256 void PatchingStub::emit_code(LIR_Assembler* ce) {
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257 // copy original code here
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258 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF,
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259 "not enough room for call");
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260 assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes");
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261
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262 Label call_patch;
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263
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264 int being_initialized_entry = __ offset();
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265
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266 if (_id == load_klass_id) {
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267 // produce a copy of the load klass instruction for use by the being initialized case
727
6b2273dd6fa9 6822110: Add AddressLiteral class on SPARC
twisti
parents: 342
diff changeset
268 #ifdef ASSERT
0
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269 address start = __ pc();
727
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twisti
parents: 342
diff changeset
270 #endif
6b2273dd6fa9 6822110: Add AddressLiteral class on SPARC
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parents: 342
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271 AddressLiteral addrlit(NULL, oop_Relocation::spec(_oop_index));
6b2273dd6fa9 6822110: Add AddressLiteral class on SPARC
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parents: 342
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272 __ patchable_set(addrlit, _obj);
0
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273
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274 #ifdef ASSERT
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275 for (int i = 0; i < _bytes_to_copy; i++) {
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276 address ptr = (address)(_pc_start + i);
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277 int a_byte = (*ptr) & 0xFF;
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278 assert(a_byte == *start++, "should be the same code");
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parents:
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279 }
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280 #endif
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281 } else {
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282 // make a copy the code which is going to be patched.
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parents:
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283 for (int i = 0; i < _bytes_to_copy; i++) {
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284 address ptr = (address)(_pc_start + i);
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285 int a_byte = (*ptr) & 0xFF;
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286 __ a_byte (a_byte);
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287 }
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288 }
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289
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290 address end_of_patch = __ pc();
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291 int bytes_to_skip = 0;
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parents:
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292 if (_id == load_klass_id) {
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293 int offset = __ offset();
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parents:
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294 if (CommentedAssembly) {
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295 __ block_comment(" being_initialized check");
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parents:
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296 }
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297
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298 // static field accesses have special semantics while the class
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parents:
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299 // initializer is being run so we emit a test which can be used to
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300 // check that this code is being executed by the initializing
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301 // thread.
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302 assert(_obj != noreg, "must be a valid register");
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parents:
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303 assert(_oop_index >= 0, "must have oop index");
2376
c7f3d0b4570f 7017732: move static fields into Class to prepare for perm gen removal
never
parents: 2168
diff changeset
304 __ ld_ptr(_obj, java_lang_Class::klass_offset_in_bytes(), G3);
c7f3d0b4570f 7017732: move static fields into Class to prepare for perm gen removal
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parents: 2168
diff changeset
305 __ ld_ptr(G3, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc), G3);
0
a61af66fc99e Initial load
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306 __ cmp(G2_thread, G3);
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parents:
diff changeset
307 __ br(Assembler::notEqual, false, Assembler::pn, call_patch);
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parents:
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308 __ delayed()->nop();
a61af66fc99e Initial load
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309
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310 // load_klass patches may execute the patched code before it's
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311 // copied back into place so we need to jump back into the main
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parents:
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312 // code of the nmethod to continue execution.
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313 __ br(Assembler::always, false, Assembler::pt, _patch_site_continuation);
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314 __ delayed()->nop();
a61af66fc99e Initial load
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315
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316 // make sure this extra code gets skipped
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317 bytes_to_skip += __ offset() - offset;
a61af66fc99e Initial load
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parents:
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318 }
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319
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320 // Now emit the patch record telling the runtime how to find the
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parents:
diff changeset
321 // pieces of the patch. We only need 3 bytes but it has to be
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parents:
diff changeset
322 // aligned as an instruction so emit 4 bytes.
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parents:
diff changeset
323 int sizeof_patch_record = 4;
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324 bytes_to_skip += sizeof_patch_record;
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325
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parents:
diff changeset
326 // emit the offsets needed to find the code to patch
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327 int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record;
a61af66fc99e Initial load
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parents:
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328
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329 // Emit the patch record. We need to emit a full word, so emit an extra empty byte
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330 __ a_byte(0);
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331 __ a_byte(being_initialized_entry_offset);
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332 __ a_byte(bytes_to_skip);
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333 __ a_byte(_bytes_to_copy);
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334 address patch_info_pc = __ pc();
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335 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
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336
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337 address entry = __ pc();
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338 NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
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339 address target = NULL;
a61af66fc99e Initial load
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340 switch (_id) {
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341 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
a61af66fc99e Initial load
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parents:
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342 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); break;
a61af66fc99e Initial load
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parents:
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343 default: ShouldNotReachHere();
a61af66fc99e Initial load
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parents:
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344 }
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parents:
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345 __ bind(call_patch);
a61af66fc99e Initial load
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parents:
diff changeset
346
a61af66fc99e Initial load
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347 if (CommentedAssembly) {
a61af66fc99e Initial load
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parents:
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348 __ block_comment("patch entry point");
a61af66fc99e Initial load
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parents:
diff changeset
349 }
a61af66fc99e Initial load
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parents:
diff changeset
350 __ call(target, relocInfo::runtime_call_type);
a61af66fc99e Initial load
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parents:
diff changeset
351 __ delayed()->nop();
a61af66fc99e Initial load
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parents:
diff changeset
352 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
a61af66fc99e Initial load
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parents:
diff changeset
353 ce->add_call_info_here(_info);
a61af66fc99e Initial load
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parents:
diff changeset
354 __ br(Assembler::always, false, Assembler::pt, _patch_site_entry);
a61af66fc99e Initial load
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parents:
diff changeset
355 __ delayed()->nop();
a61af66fc99e Initial load
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parents:
diff changeset
356 if (_id == load_klass_id) {
a61af66fc99e Initial load
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parents:
diff changeset
357 CodeSection* cs = __ code_section();
a61af66fc99e Initial load
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parents:
diff changeset
358 address pc = (address)_pc_start;
a61af66fc99e Initial load
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parents:
diff changeset
359 RelocIterator iter(cs, pc, pc + 1);
a61af66fc99e Initial load
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parents:
diff changeset
360 relocInfo::change_reloc_info_for_address(&iter, (address) pc, relocInfo::oop_type, relocInfo::none);
a61af66fc99e Initial load
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parents:
diff changeset
361
a61af66fc99e Initial load
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parents:
diff changeset
362 pc = (address)(_pc_start + NativeMovConstReg::add_offset);
a61af66fc99e Initial load
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parents:
diff changeset
363 RelocIterator iter2(cs, pc, pc+1);
a61af66fc99e Initial load
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parents:
diff changeset
364 relocInfo::change_reloc_info_for_address(&iter2, (address) pc, relocInfo::oop_type, relocInfo::none);
a61af66fc99e Initial load
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parents:
diff changeset
365 }
a61af66fc99e Initial load
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parents:
diff changeset
366
a61af66fc99e Initial load
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parents:
diff changeset
367 }
a61af66fc99e Initial load
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parents:
diff changeset
368
1295
3cf667df43ef 6919934: JSR 292 needs to support x86 C1
twisti
parents: 727
diff changeset
369
3cf667df43ef 6919934: JSR 292 needs to support x86 C1
twisti
parents: 727
diff changeset
370 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
3cf667df43ef 6919934: JSR 292 needs to support x86 C1
twisti
parents: 727
diff changeset
371 __ bind(_entry);
3cf667df43ef 6919934: JSR 292 needs to support x86 C1
twisti
parents: 727
diff changeset
372 __ call(SharedRuntime::deopt_blob()->unpack_with_reexecution());
3cf667df43ef 6919934: JSR 292 needs to support x86 C1
twisti
parents: 727
diff changeset
373 __ delayed()->nop();
3cf667df43ef 6919934: JSR 292 needs to support x86 C1
twisti
parents: 727
diff changeset
374 ce->add_call_info_here(_info);
3cf667df43ef 6919934: JSR 292 needs to support x86 C1
twisti
parents: 727
diff changeset
375 debug_only(__ should_not_reach_here());
3cf667df43ef 6919934: JSR 292 needs to support x86 C1
twisti
parents: 727
diff changeset
376 }
3cf667df43ef 6919934: JSR 292 needs to support x86 C1
twisti
parents: 727
diff changeset
377
3cf667df43ef 6919934: JSR 292 needs to support x86 C1
twisti
parents: 727
diff changeset
378
0
a61af66fc99e Initial load
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parents:
diff changeset
379 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
a61af66fc99e Initial load
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parents:
diff changeset
380 //---------------slow case: call to native-----------------
a61af66fc99e Initial load
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parents:
diff changeset
381 __ bind(_entry);
a61af66fc99e Initial load
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parents:
diff changeset
382 __ mov(src()->as_register(), O0);
a61af66fc99e Initial load
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parents:
diff changeset
383 __ mov(src_pos()->as_register(), O1);
a61af66fc99e Initial load
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parents:
diff changeset
384 __ mov(dst()->as_register(), O2);
a61af66fc99e Initial load
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parents:
diff changeset
385 __ mov(dst_pos()->as_register(), O3);
a61af66fc99e Initial load
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parents:
diff changeset
386 __ mov(length()->as_register(), O4);
a61af66fc99e Initial load
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parents:
diff changeset
387
a61af66fc99e Initial load
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parents:
diff changeset
388 ce->emit_static_call_stub();
a61af66fc99e Initial load
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parents:
diff changeset
389
a61af66fc99e Initial load
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parents:
diff changeset
390 __ call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type);
a61af66fc99e Initial load
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parents:
diff changeset
391 __ delayed()->nop();
a61af66fc99e Initial load
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parents:
diff changeset
392 ce->add_call_info_here(info());
a61af66fc99e Initial load
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parents:
diff changeset
393 ce->verify_oop_map(info());
a61af66fc99e Initial load
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parents:
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394
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parents:
diff changeset
395 #ifndef PRODUCT
a61af66fc99e Initial load
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parents:
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396 __ set((intptr_t)&Runtime1::_arraycopy_slowcase_cnt, O0);
a61af66fc99e Initial load
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parents:
diff changeset
397 __ ld(O0, 0, O1);
a61af66fc99e Initial load
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parents:
diff changeset
398 __ inc(O1);
a61af66fc99e Initial load
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parents:
diff changeset
399 __ st(O1, 0, O0);
a61af66fc99e Initial load
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parents:
diff changeset
400 #endif
a61af66fc99e Initial load
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parents:
diff changeset
401
a61af66fc99e Initial load
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parents:
diff changeset
402 __ br(Assembler::always, false, Assembler::pt, _continuation);
a61af66fc99e Initial load
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parents:
diff changeset
403 __ delayed()->nop();
a61af66fc99e Initial load
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parents:
diff changeset
404 }
a61af66fc99e Initial load
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parents:
diff changeset
405
a61af66fc99e Initial load
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parents:
diff changeset
406
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 0
diff changeset
407 ///////////////////////////////////////////////////////////////////////////////////
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 0
diff changeset
408 #ifndef SERIALGC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 0
diff changeset
409
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 0
diff changeset
410 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 0
diff changeset
411 __ bind(_entry);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 0
diff changeset
412
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 0
diff changeset
413 assert(pre_val()->is_register(), "Precondition.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 0
diff changeset
414
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 0
diff changeset
415 Register pre_val_reg = pre_val()->as_register();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 0
diff changeset
416
2002
ac637b7220d1 6985015: C1 needs to support compressed oops
iveresov
parents: 1972
diff changeset
417 ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/);
1848
c393f046f4c5 6991512: G1 barriers fail with 64bit C1
iveresov
parents: 1819
diff changeset
418 if (__ is_in_wdisp16_range(_continuation)) {
c393f046f4c5 6991512: G1 barriers fail with 64bit C1
iveresov
parents: 1819
diff changeset
419 __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
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420 pre_val_reg, _continuation);
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421 } else {
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422 __ cmp(pre_val_reg, G0);
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423 __ brx(Assembler::equal, false, Assembler::pn, _continuation);
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424 }
342
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425 __ delayed()->nop();
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426
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427 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_pre_barrier_slow_id));
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428 __ delayed()->mov(pre_val_reg, G4);
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429 __ br(Assembler::always, false, Assembler::pt, _continuation);
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430 __ delayed()->nop();
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431
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432 }
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433
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434 jbyte* G1PostBarrierStub::_byte_map_base = NULL;
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435
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436 jbyte* G1PostBarrierStub::byte_map_base_slow() {
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437 BarrierSet* bs = Universe::heap()->barrier_set();
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438 assert(bs->is_a(BarrierSet::G1SATBCTLogging),
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439 "Must be if we're using this.");
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440 return ((G1SATBCardTableModRefBS*)bs)->byte_map_base;
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441 }
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442
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443 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
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444 __ bind(_entry);
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445
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446 assert(addr()->is_register(), "Precondition.");
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447 assert(new_val()->is_register(), "Precondition.");
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448 Register addr_reg = addr()->as_pointer_register();
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449 Register new_val_reg = new_val()->as_register();
1848
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450 if (__ is_in_wdisp16_range(_continuation)) {
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451 __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
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452 new_val_reg, _continuation);
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453 } else {
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454 __ cmp(new_val_reg, G0);
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455 __ brx(Assembler::equal, false, Assembler::pn, _continuation);
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456 }
342
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457 __ delayed()->nop();
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458
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459 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_post_barrier_slow_id));
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460 __ delayed()->mov(addr_reg, G4);
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461 __ br(Assembler::always, false, Assembler::pt, _continuation);
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462 __ delayed()->nop();
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463 }
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464
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465 #endif // SERIALGC
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466 ///////////////////////////////////////////////////////////////////////////////////
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467
0
a61af66fc99e Initial load
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468 #undef __