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1 /*
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2 * Copyright 1999-2010 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 #include "incls/_precompiled.incl"
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26 #include "incls/_c1_CodeStubs_sparc.cpp.incl"
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27
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28 #define __ ce->masm()->
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29
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30 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
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31 bool throw_index_out_of_bounds_exception)
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32 : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
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33 , _index(index)
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34 {
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35 _info = new CodeEmitInfo(info);
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36 }
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37
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38
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39 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
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40 __ bind(_entry);
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41
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42 if (_index->is_register()) {
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43 __ mov(_index->as_register(), G4);
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44 } else {
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45 __ set(_index->as_jint(), G4);
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46 }
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47 if (_throw_index_out_of_bounds_exception) {
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48 __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type);
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49 } else {
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50 __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type);
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51 }
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52 __ delayed()->nop();
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53 ce->add_call_info_here(_info);
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54 ce->verify_oop_map(_info);
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55 #ifdef ASSERT
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56 __ should_not_reach_here();
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57 #endif
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58 }
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59
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60 #ifdef TIERED
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61
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62 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
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63 __ bind(_entry);
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64 __ set(_bci, G4);
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65 __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type);
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66 __ delayed()->nop();
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67 ce->add_call_info_here(_info);
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68 ce->verify_oop_map(_info);
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69
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70 __ br(Assembler::always, true, Assembler::pt, _continuation);
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71 __ delayed()->nop();
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72 }
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73
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74 #endif // TIERED
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75
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76 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
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77 if (_offset != -1) {
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78 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
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79 }
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80 __ bind(_entry);
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81 __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type);
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82 __ delayed()->nop();
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83 ce->add_call_info_here(_info);
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84 ce->verify_oop_map(_info);
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85 #ifdef ASSERT
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86 __ should_not_reach_here();
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87 #endif
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88 }
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89
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90
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91 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
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92 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
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93 __ bind(_entry);
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94 __ call(Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id),
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95 relocInfo::runtime_call_type);
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96 __ delayed()->nop();
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97 ce->add_call_info_here(_info);
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98 ce->verify_oop_map(_info);
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99 #ifdef ASSERT
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100 __ should_not_reach_here();
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101 #endif
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102 }
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103
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104
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105 // Implementation of SimpleExceptionStub
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106 // Note: %g1 and %g3 are already in use
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107 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
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108 __ bind(_entry);
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109 __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type);
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110
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111 if (_obj->is_valid()) {
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112 __ delayed()->mov(_obj->as_register(), G4); // _obj contains the optional argument to the stub
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113 } else {
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114 __ delayed()->mov(G0, G4);
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115 }
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116 ce->add_call_info_here(_info);
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117 #ifdef ASSERT
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118 __ should_not_reach_here();
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119 #endif
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120 }
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121
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122
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123 // Implementation of ArrayStoreExceptionStub
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124
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125 ArrayStoreExceptionStub::ArrayStoreExceptionStub(CodeEmitInfo* info):
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126 _info(info) {
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127 }
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128
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129
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130 void ArrayStoreExceptionStub::emit_code(LIR_Assembler* ce) {
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131 __ bind(_entry);
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132 __ call(Runtime1::entry_for(Runtime1::throw_array_store_exception_id), relocInfo::runtime_call_type);
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133 __ delayed()->nop();
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134 ce->add_call_info_here(_info);
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135 ce->verify_oop_map(_info);
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136 #ifdef ASSERT
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137 __ should_not_reach_here();
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138 #endif
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139 }
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140
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141
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142
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143
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144 // Implementation of NewInstanceStub
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145
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146 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
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147 _result = result;
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148 _klass = klass;
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149 _klass_reg = klass_reg;
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150 _info = new CodeEmitInfo(info);
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151 assert(stub_id == Runtime1::new_instance_id ||
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152 stub_id == Runtime1::fast_new_instance_id ||
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153 stub_id == Runtime1::fast_new_instance_init_check_id,
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154 "need new_instance id");
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155 _stub_id = stub_id;
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156 }
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157
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158
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159 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
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160 __ bind(_entry);
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161 __ call(Runtime1::entry_for(_stub_id), relocInfo::runtime_call_type);
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162 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
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163 ce->add_call_info_here(_info);
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164 ce->verify_oop_map(_info);
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165 __ br(Assembler::always, false, Assembler::pt, _continuation);
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166 __ delayed()->mov_or_nop(O0, _result->as_register());
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167 }
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168
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169
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170 // Implementation of NewTypeArrayStub
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171 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
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172 _klass_reg = klass_reg;
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173 _length = length;
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174 _result = result;
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175 _info = new CodeEmitInfo(info);
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176 }
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177
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178
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179 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
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180 __ bind(_entry);
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181
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182 __ mov(_length->as_register(), G4);
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183 __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type);
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184 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
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185 ce->add_call_info_here(_info);
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186 ce->verify_oop_map(_info);
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187 __ br(Assembler::always, false, Assembler::pt, _continuation);
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188 __ delayed()->mov_or_nop(O0, _result->as_register());
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189 }
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190
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191
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192 // Implementation of NewObjectArrayStub
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193
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194 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
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195 _klass_reg = klass_reg;
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196 _length = length;
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197 _result = result;
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198 _info = new CodeEmitInfo(info);
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199 }
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200
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201
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202 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
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203 __ bind(_entry);
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204
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205 __ mov(_length->as_register(), G4);
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206 __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type);
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207 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
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208 ce->add_call_info_here(_info);
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209 ce->verify_oop_map(_info);
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210 __ br(Assembler::always, false, Assembler::pt, _continuation);
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211 __ delayed()->mov_or_nop(O0, _result->as_register());
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212 }
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213
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214
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215 // Implementation of MonitorAccessStubs
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216 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
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217 : MonitorAccessStub(obj_reg, lock_reg) {
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218 _info = new CodeEmitInfo(info);
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219 }
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220
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221
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222 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
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223 __ bind(_entry);
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224 __ mov(_obj_reg->as_register(), G4);
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225 if (ce->compilation()->has_fpu_code()) {
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226 __ call(Runtime1::entry_for(Runtime1::monitorenter_id), relocInfo::runtime_call_type);
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227 } else {
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228 __ call(Runtime1::entry_for(Runtime1::monitorenter_nofpu_id), relocInfo::runtime_call_type);
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229 }
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230 __ delayed()->mov_or_nop(_lock_reg->as_register(), G5);
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231 ce->add_call_info_here(_info);
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232 ce->verify_oop_map(_info);
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233 __ br(Assembler::always, true, Assembler::pt, _continuation);
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234 __ delayed()->nop();
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235 }
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236
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237
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238 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
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239 __ bind(_entry);
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240 if (_compute_lock) {
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241 ce->monitor_address(_monitor_ix, _lock_reg);
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242 }
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243 if (ce->compilation()->has_fpu_code()) {
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244 __ call(Runtime1::entry_for(Runtime1::monitorexit_id), relocInfo::runtime_call_type);
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245 } else {
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246 __ call(Runtime1::entry_for(Runtime1::monitorexit_nofpu_id), relocInfo::runtime_call_type);
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247 }
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248
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249 __ delayed()->mov_or_nop(_lock_reg->as_register(), G4);
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250 __ br(Assembler::always, true, Assembler::pt, _continuation);
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251 __ delayed()->nop();
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252 }
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253
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254 // Implementation of patching:
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255 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
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256 // - Replace original code with a call to the stub
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257 // At Runtime:
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258 // - call to stub, jump to runtime
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259 // - in runtime: preserve all registers (especially objects, i.e., source and destination object)
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260 // - in runtime: after initializing class, restore original code, reexecute instruction
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261
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262 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
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263
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264 void PatchingStub::align_patch_site(MacroAssembler* ) {
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265 // patch sites on sparc are always properly aligned.
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266 }
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267
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268 void PatchingStub::emit_code(LIR_Assembler* ce) {
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269 // copy original code here
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270 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF,
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271 "not enough room for call");
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272 assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes");
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273
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274 Label call_patch;
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275
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276 int being_initialized_entry = __ offset();
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277
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278 if (_id == load_klass_id) {
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279 // produce a copy of the load klass instruction for use by the being initialized case
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280 #ifdef ASSERT
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281 address start = __ pc();
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727
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282 #endif
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283 AddressLiteral addrlit(NULL, oop_Relocation::spec(_oop_index));
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284 __ patchable_set(addrlit, _obj);
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285
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286 #ifdef ASSERT
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287 for (int i = 0; i < _bytes_to_copy; i++) {
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288 address ptr = (address)(_pc_start + i);
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289 int a_byte = (*ptr) & 0xFF;
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290 assert(a_byte == *start++, "should be the same code");
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291 }
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292 #endif
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293 } else {
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294 // make a copy the code which is going to be patched.
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295 for (int i = 0; i < _bytes_to_copy; i++) {
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296 address ptr = (address)(_pc_start + i);
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297 int a_byte = (*ptr) & 0xFF;
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298 __ a_byte (a_byte);
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299 }
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300 }
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301
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302 address end_of_patch = __ pc();
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303 int bytes_to_skip = 0;
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304 if (_id == load_klass_id) {
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305 int offset = __ offset();
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306 if (CommentedAssembly) {
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307 __ block_comment(" being_initialized check");
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308 }
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309
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310 // static field accesses have special semantics while the class
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311 // initializer is being run so we emit a test which can be used to
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312 // check that this code is being executed by the initializing
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313 // thread.
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314 assert(_obj != noreg, "must be a valid register");
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315 assert(_oop_index >= 0, "must have oop index");
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316 __ ld_ptr(_obj, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc), G3);
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317 __ cmp(G2_thread, G3);
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318 __ br(Assembler::notEqual, false, Assembler::pn, call_patch);
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319 __ delayed()->nop();
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320
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321 // load_klass patches may execute the patched code before it's
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322 // copied back into place so we need to jump back into the main
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323 // code of the nmethod to continue execution.
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324 __ br(Assembler::always, false, Assembler::pt, _patch_site_continuation);
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325 __ delayed()->nop();
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326
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327 // make sure this extra code gets skipped
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328 bytes_to_skip += __ offset() - offset;
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329 }
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330
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331 // Now emit the patch record telling the runtime how to find the
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332 // pieces of the patch. We only need 3 bytes but it has to be
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333 // aligned as an instruction so emit 4 bytes.
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334 int sizeof_patch_record = 4;
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335 bytes_to_skip += sizeof_patch_record;
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336
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337 // emit the offsets needed to find the code to patch
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338 int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record;
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339
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340 // Emit the patch record. We need to emit a full word, so emit an extra empty byte
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341 __ a_byte(0);
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342 __ a_byte(being_initialized_entry_offset);
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343 __ a_byte(bytes_to_skip);
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344 __ a_byte(_bytes_to_copy);
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345 address patch_info_pc = __ pc();
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346 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
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347
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348 address entry = __ pc();
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349 NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
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350 address target = NULL;
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351 switch (_id) {
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352 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
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353 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); break;
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354 default: ShouldNotReachHere();
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355 }
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356 __ bind(call_patch);
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357
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358 if (CommentedAssembly) {
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359 __ block_comment("patch entry point");
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360 }
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361 __ call(target, relocInfo::runtime_call_type);
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362 __ delayed()->nop();
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363 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
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364 ce->add_call_info_here(_info);
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365 __ br(Assembler::always, false, Assembler::pt, _patch_site_entry);
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366 __ delayed()->nop();
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367 if (_id == load_klass_id) {
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368 CodeSection* cs = __ code_section();
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369 address pc = (address)_pc_start;
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370 RelocIterator iter(cs, pc, pc + 1);
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371 relocInfo::change_reloc_info_for_address(&iter, (address) pc, relocInfo::oop_type, relocInfo::none);
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372
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373 pc = (address)(_pc_start + NativeMovConstReg::add_offset);
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374 RelocIterator iter2(cs, pc, pc+1);
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375 relocInfo::change_reloc_info_for_address(&iter2, (address) pc, relocInfo::oop_type, relocInfo::none);
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376 }
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377
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378 }
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379
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1295
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380
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381 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
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382 __ bind(_entry);
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383 __ call(SharedRuntime::deopt_blob()->unpack_with_reexecution());
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384 __ delayed()->nop();
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385 ce->add_call_info_here(_info);
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386 debug_only(__ should_not_reach_here());
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387 }
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388
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389
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0
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390 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
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391 //---------------slow case: call to native-----------------
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392 __ bind(_entry);
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393 __ mov(src()->as_register(), O0);
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394 __ mov(src_pos()->as_register(), O1);
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395 __ mov(dst()->as_register(), O2);
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396 __ mov(dst_pos()->as_register(), O3);
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397 __ mov(length()->as_register(), O4);
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398
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399 ce->emit_static_call_stub();
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400
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401 __ call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type);
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402 __ delayed()->nop();
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403 ce->add_call_info_here(info());
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404 ce->verify_oop_map(info());
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405
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406 #ifndef PRODUCT
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407 __ set((intptr_t)&Runtime1::_arraycopy_slowcase_cnt, O0);
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408 __ ld(O0, 0, O1);
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409 __ inc(O1);
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410 __ st(O1, 0, O0);
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411 #endif
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412
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413 __ br(Assembler::always, false, Assembler::pt, _continuation);
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414 __ delayed()->nop();
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415 }
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416
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417
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342
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418 ///////////////////////////////////////////////////////////////////////////////////
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419 #ifndef SERIALGC
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420
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421 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
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422 __ bind(_entry);
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423
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424 assert(pre_val()->is_register(), "Precondition.");
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425
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426 Register pre_val_reg = pre_val()->as_register();
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427
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428 ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false);
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429 __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
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430 pre_val_reg, _continuation);
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431 __ delayed()->nop();
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432
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433 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_pre_barrier_slow_id));
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434 __ delayed()->mov(pre_val_reg, G4);
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435 __ br(Assembler::always, false, Assembler::pt, _continuation);
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436 __ delayed()->nop();
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437
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438 }
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439
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440 jbyte* G1PostBarrierStub::_byte_map_base = NULL;
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441
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442 jbyte* G1PostBarrierStub::byte_map_base_slow() {
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443 BarrierSet* bs = Universe::heap()->barrier_set();
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444 assert(bs->is_a(BarrierSet::G1SATBCTLogging),
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445 "Must be if we're using this.");
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446 return ((G1SATBCardTableModRefBS*)bs)->byte_map_base;
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447 }
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448
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449 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
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450 __ bind(_entry);
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451
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452 assert(addr()->is_register(), "Precondition.");
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453 assert(new_val()->is_register(), "Precondition.");
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454 Register addr_reg = addr()->as_pointer_register();
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455 Register new_val_reg = new_val()->as_register();
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456 __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
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457 new_val_reg, _continuation);
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458 __ delayed()->nop();
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459
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460 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_post_barrier_slow_id));
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461 __ delayed()->mov(addr_reg, G4);
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462 __ br(Assembler::always, false, Assembler::pt, _continuation);
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463 __ delayed()->nop();
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464 }
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465
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466 #endif // SERIALGC
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467 ///////////////////////////////////////////////////////////////////////////////////
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468
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0
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469 #undef __
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