Mercurial > hg > truffle
annotate src/cpu/sparc/vm/c1_CodeStubs_sparc.cpp @ 17524:89152779163c
Merge with jdk8-b132
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Wed, 15 Oct 2014 11:59:32 +0200 |
| parents | 4ca6dc0799b6 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 17524 | 2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "c1/c1_CodeStubs.hpp" | |
| 27 #include "c1/c1_FrameMap.hpp" | |
| 28 #include "c1/c1_LIRAssembler.hpp" | |
| 29 #include "c1/c1_MacroAssembler.hpp" | |
| 30 #include "c1/c1_Runtime1.hpp" | |
| 31 #include "nativeInst_sparc.hpp" | |
| 32 #include "runtime/sharedRuntime.hpp" | |
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33 #include "utilities/macros.hpp" |
| 1972 | 34 #include "vmreg_sparc.inline.hpp" |
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35 #if INCLUDE_ALL_GCS |
| 1972 | 36 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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37 #endif // INCLUDE_ALL_GCS |
| 0 | 38 |
| 39 #define __ ce->masm()-> | |
| 40 | |
| 41 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, | |
| 42 bool throw_index_out_of_bounds_exception) | |
| 43 : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception) | |
| 44 , _index(index) | |
| 45 { | |
| 1819 | 46 assert(info != NULL, "must have info"); |
| 0 | 47 _info = new CodeEmitInfo(info); |
| 48 } | |
| 49 | |
| 50 | |
| 51 void RangeCheckStub::emit_code(LIR_Assembler* ce) { | |
| 52 __ bind(_entry); | |
| 53 | |
| 8860 | 54 if (_info->deoptimize_on_exception()) { |
| 55 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); | |
| 56 __ call(a, relocInfo::runtime_call_type); | |
| 57 __ delayed()->nop(); | |
| 58 ce->add_call_info_here(_info); | |
| 59 ce->verify_oop_map(_info); | |
| 60 debug_only(__ should_not_reach_here()); | |
| 61 return; | |
| 62 } | |
| 63 | |
| 0 | 64 if (_index->is_register()) { |
| 65 __ mov(_index->as_register(), G4); | |
| 66 } else { | |
| 67 __ set(_index->as_jint(), G4); | |
| 68 } | |
| 69 if (_throw_index_out_of_bounds_exception) { | |
| 70 __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type); | |
| 71 } else { | |
| 72 __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type); | |
| 73 } | |
| 74 __ delayed()->nop(); | |
| 75 ce->add_call_info_here(_info); | |
| 76 ce->verify_oop_map(_info); | |
| 8860 | 77 debug_only(__ should_not_reach_here()); |
| 78 } | |
| 79 | |
| 80 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) { | |
| 81 _info = new CodeEmitInfo(info); | |
| 0 | 82 } |
| 83 | |
| 8860 | 84 void PredicateFailedStub::emit_code(LIR_Assembler* ce) { |
| 85 __ bind(_entry); | |
| 86 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); | |
| 87 __ call(a, relocInfo::runtime_call_type); | |
| 88 __ delayed()->nop(); | |
| 89 ce->add_call_info_here(_info); | |
| 90 ce->verify_oop_map(_info); | |
| 91 debug_only(__ should_not_reach_here()); | |
| 92 } | |
| 0 | 93 |
| 94 void CounterOverflowStub::emit_code(LIR_Assembler* ce) { | |
| 95 __ bind(_entry); | |
| 96 __ set(_bci, G4); | |
| 97 __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type); | |
| 1783 | 98 __ delayed()->mov_or_nop(_method->as_register(), G5); |
| 0 | 99 ce->add_call_info_here(_info); |
| 100 ce->verify_oop_map(_info); | |
| 101 | |
| 102 __ br(Assembler::always, true, Assembler::pt, _continuation); | |
| 103 __ delayed()->nop(); | |
| 104 } | |
| 105 | |
| 106 | |
| 107 void DivByZeroStub::emit_code(LIR_Assembler* ce) { | |
| 108 if (_offset != -1) { | |
| 109 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); | |
| 110 } | |
| 111 __ bind(_entry); | |
| 112 __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type); | |
| 113 __ delayed()->nop(); | |
| 114 ce->add_call_info_here(_info); | |
| 115 ce->verify_oop_map(_info); | |
| 116 #ifdef ASSERT | |
| 117 __ should_not_reach_here(); | |
| 118 #endif | |
| 119 } | |
| 120 | |
| 121 | |
| 122 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) { | |
| 8860 | 123 address a; |
| 124 if (_info->deoptimize_on_exception()) { | |
| 125 // Deoptimize, do not throw the exception, because it is probably wrong to do it here. | |
| 126 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id); | |
| 127 } else { | |
| 128 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id); | |
| 129 } | |
| 130 | |
| 0 | 131 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); |
| 132 __ bind(_entry); | |
| 8860 | 133 __ call(a, relocInfo::runtime_call_type); |
| 0 | 134 __ delayed()->nop(); |
| 135 ce->add_call_info_here(_info); | |
| 136 ce->verify_oop_map(_info); | |
| 137 #ifdef ASSERT | |
| 138 __ should_not_reach_here(); | |
| 139 #endif | |
| 140 } | |
| 141 | |
| 142 | |
| 143 // Implementation of SimpleExceptionStub | |
| 144 // Note: %g1 and %g3 are already in use | |
| 145 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) { | |
| 146 __ bind(_entry); | |
| 147 __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type); | |
| 148 | |
| 149 if (_obj->is_valid()) { | |
| 150 __ delayed()->mov(_obj->as_register(), G4); // _obj contains the optional argument to the stub | |
| 151 } else { | |
| 152 __ delayed()->mov(G0, G4); | |
| 153 } | |
| 154 ce->add_call_info_here(_info); | |
| 155 #ifdef ASSERT | |
| 156 __ should_not_reach_here(); | |
| 157 #endif | |
| 158 } | |
| 159 | |
| 160 | |
| 161 // Implementation of NewInstanceStub | |
| 162 | |
| 163 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) { | |
| 164 _result = result; | |
| 165 _klass = klass; | |
| 166 _klass_reg = klass_reg; | |
| 167 _info = new CodeEmitInfo(info); | |
| 168 assert(stub_id == Runtime1::new_instance_id || | |
| 169 stub_id == Runtime1::fast_new_instance_id || | |
| 170 stub_id == Runtime1::fast_new_instance_init_check_id, | |
| 171 "need new_instance id"); | |
| 172 _stub_id = stub_id; | |
| 173 } | |
| 174 | |
| 175 | |
| 176 void NewInstanceStub::emit_code(LIR_Assembler* ce) { | |
| 177 __ bind(_entry); | |
| 178 __ call(Runtime1::entry_for(_stub_id), relocInfo::runtime_call_type); | |
| 179 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5); | |
| 180 ce->add_call_info_here(_info); | |
| 181 ce->verify_oop_map(_info); | |
| 182 __ br(Assembler::always, false, Assembler::pt, _continuation); | |
| 183 __ delayed()->mov_or_nop(O0, _result->as_register()); | |
| 184 } | |
| 185 | |
| 186 | |
| 187 // Implementation of NewTypeArrayStub | |
| 188 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { | |
| 189 _klass_reg = klass_reg; | |
| 190 _length = length; | |
| 191 _result = result; | |
| 192 _info = new CodeEmitInfo(info); | |
| 193 } | |
| 194 | |
| 195 | |
| 196 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) { | |
| 197 __ bind(_entry); | |
| 198 | |
| 199 __ mov(_length->as_register(), G4); | |
| 200 __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type); | |
| 201 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5); | |
| 202 ce->add_call_info_here(_info); | |
| 203 ce->verify_oop_map(_info); | |
| 204 __ br(Assembler::always, false, Assembler::pt, _continuation); | |
| 205 __ delayed()->mov_or_nop(O0, _result->as_register()); | |
| 206 } | |
| 207 | |
| 208 | |
| 209 // Implementation of NewObjectArrayStub | |
| 210 | |
| 211 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { | |
| 212 _klass_reg = klass_reg; | |
| 213 _length = length; | |
| 214 _result = result; | |
| 215 _info = new CodeEmitInfo(info); | |
| 216 } | |
| 217 | |
| 218 | |
| 219 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) { | |
| 220 __ bind(_entry); | |
| 221 | |
| 222 __ mov(_length->as_register(), G4); | |
| 223 __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type); | |
| 224 __ delayed()->mov_or_nop(_klass_reg->as_register(), G5); | |
| 225 ce->add_call_info_here(_info); | |
| 226 ce->verify_oop_map(_info); | |
| 227 __ br(Assembler::always, false, Assembler::pt, _continuation); | |
| 228 __ delayed()->mov_or_nop(O0, _result->as_register()); | |
| 229 } | |
| 230 | |
| 231 | |
| 232 // Implementation of MonitorAccessStubs | |
| 233 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info) | |
| 234 : MonitorAccessStub(obj_reg, lock_reg) { | |
| 235 _info = new CodeEmitInfo(info); | |
| 236 } | |
| 237 | |
| 238 | |
| 239 void MonitorEnterStub::emit_code(LIR_Assembler* ce) { | |
| 240 __ bind(_entry); | |
| 241 __ mov(_obj_reg->as_register(), G4); | |
| 242 if (ce->compilation()->has_fpu_code()) { | |
| 243 __ call(Runtime1::entry_for(Runtime1::monitorenter_id), relocInfo::runtime_call_type); | |
| 244 } else { | |
| 245 __ call(Runtime1::entry_for(Runtime1::monitorenter_nofpu_id), relocInfo::runtime_call_type); | |
| 246 } | |
| 247 __ delayed()->mov_or_nop(_lock_reg->as_register(), G5); | |
| 248 ce->add_call_info_here(_info); | |
| 249 ce->verify_oop_map(_info); | |
| 250 __ br(Assembler::always, true, Assembler::pt, _continuation); | |
| 251 __ delayed()->nop(); | |
| 252 } | |
| 253 | |
| 254 | |
| 255 void MonitorExitStub::emit_code(LIR_Assembler* ce) { | |
| 256 __ bind(_entry); | |
| 257 if (_compute_lock) { | |
| 258 ce->monitor_address(_monitor_ix, _lock_reg); | |
| 259 } | |
| 260 if (ce->compilation()->has_fpu_code()) { | |
| 261 __ call(Runtime1::entry_for(Runtime1::monitorexit_id), relocInfo::runtime_call_type); | |
| 262 } else { | |
| 263 __ call(Runtime1::entry_for(Runtime1::monitorexit_nofpu_id), relocInfo::runtime_call_type); | |
| 264 } | |
| 265 | |
| 266 __ delayed()->mov_or_nop(_lock_reg->as_register(), G4); | |
| 267 __ br(Assembler::always, true, Assembler::pt, _continuation); | |
| 268 __ delayed()->nop(); | |
| 269 } | |
| 270 | |
| 271 // Implementation of patching: | |
| 272 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes) | |
| 273 // - Replace original code with a call to the stub | |
| 274 // At Runtime: | |
| 275 // - call to stub, jump to runtime | |
| 276 // - in runtime: preserve all registers (especially objects, i.e., source and destination object) | |
| 277 // - in runtime: after initializing class, restore original code, reexecute instruction | |
| 278 | |
| 279 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size; | |
| 280 | |
| 281 void PatchingStub::align_patch_site(MacroAssembler* ) { | |
| 282 // patch sites on sparc are always properly aligned. | |
| 283 } | |
| 284 | |
| 285 void PatchingStub::emit_code(LIR_Assembler* ce) { | |
| 286 // copy original code here | |
| 287 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, | |
| 288 "not enough room for call"); | |
| 289 assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes"); | |
| 290 | |
| 291 Label call_patch; | |
| 292 | |
| 293 int being_initialized_entry = __ offset(); | |
| 294 | |
| 295 if (_id == load_klass_id) { | |
| 296 // produce a copy of the load klass instruction for use by the being initialized case | |
| 727 | 297 #ifdef ASSERT |
| 0 | 298 address start = __ pc(); |
| 727 | 299 #endif |
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300 AddressLiteral addrlit(NULL, metadata_Relocation::spec(_index)); |
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301 __ patchable_set(addrlit, _obj); |
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302 |
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303 #ifdef ASSERT |
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304 for (int i = 0; i < _bytes_to_copy; i++) { |
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305 address ptr = (address)(_pc_start + i); |
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306 int a_byte = (*ptr) & 0xFF; |
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307 assert(a_byte == *start++, "should be the same code"); |
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308 } |
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309 #endif |
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310 } else if (_id == load_mirror_id || _id == load_appendix_id) { |
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311 // produce a copy of the load mirror instruction for use by the being initialized case |
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312 #ifdef ASSERT |
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313 address start = __ pc(); |
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314 #endif |
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315 AddressLiteral addrlit(NULL, oop_Relocation::spec(_index)); |
| 727 | 316 __ patchable_set(addrlit, _obj); |
| 0 | 317 |
| 318 #ifdef ASSERT | |
| 319 for (int i = 0; i < _bytes_to_copy; i++) { | |
| 320 address ptr = (address)(_pc_start + i); | |
| 321 int a_byte = (*ptr) & 0xFF; | |
| 322 assert(a_byte == *start++, "should be the same code"); | |
| 323 } | |
| 324 #endif | |
| 325 } else { | |
| 326 // make a copy the code which is going to be patched. | |
| 327 for (int i = 0; i < _bytes_to_copy; i++) { | |
| 328 address ptr = (address)(_pc_start + i); | |
| 329 int a_byte = (*ptr) & 0xFF; | |
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330 __ emit_int8 (a_byte); |
| 0 | 331 } |
| 332 } | |
| 333 | |
| 334 address end_of_patch = __ pc(); | |
| 335 int bytes_to_skip = 0; | |
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336 if (_id == load_mirror_id) { |
| 0 | 337 int offset = __ offset(); |
| 338 if (CommentedAssembly) { | |
| 339 __ block_comment(" being_initialized check"); | |
| 340 } | |
| 341 | |
| 342 // static field accesses have special semantics while the class | |
| 343 // initializer is being run so we emit a test which can be used to | |
| 344 // check that this code is being executed by the initializing | |
| 345 // thread. | |
| 346 assert(_obj != noreg, "must be a valid register"); | |
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347 assert(_index >= 0, "must have oop index"); |
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348 __ ld_ptr(_obj, java_lang_Class::klass_offset_in_bytes(), G3); |
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349 __ ld_ptr(G3, in_bytes(InstanceKlass::init_thread_offset()), G3); |
| 3839 | 350 __ cmp_and_brx_short(G2_thread, G3, Assembler::notEqual, Assembler::pn, call_patch); |
| 0 | 351 |
| 352 // load_klass patches may execute the patched code before it's | |
| 353 // copied back into place so we need to jump back into the main | |
| 354 // code of the nmethod to continue execution. | |
| 355 __ br(Assembler::always, false, Assembler::pt, _patch_site_continuation); | |
| 356 __ delayed()->nop(); | |
| 357 | |
| 358 // make sure this extra code gets skipped | |
| 359 bytes_to_skip += __ offset() - offset; | |
| 360 } | |
| 361 | |
| 362 // Now emit the patch record telling the runtime how to find the | |
| 363 // pieces of the patch. We only need 3 bytes but it has to be | |
| 364 // aligned as an instruction so emit 4 bytes. | |
| 365 int sizeof_patch_record = 4; | |
| 366 bytes_to_skip += sizeof_patch_record; | |
| 367 | |
| 368 // emit the offsets needed to find the code to patch | |
| 369 int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record; | |
| 370 | |
| 371 // Emit the patch record. We need to emit a full word, so emit an extra empty byte | |
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372 __ emit_int8(0); |
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373 __ emit_int8(being_initialized_entry_offset); |
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374 __ emit_int8(bytes_to_skip); |
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375 __ emit_int8(_bytes_to_copy); |
| 0 | 376 address patch_info_pc = __ pc(); |
| 377 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info"); | |
| 378 | |
| 379 address entry = __ pc(); | |
| 380 NativeGeneralJump::insert_unconditional((address)_pc_start, entry); | |
| 381 address target = NULL; | |
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382 relocInfo::relocType reloc_type = relocInfo::none; |
| 0 | 383 switch (_id) { |
| 384 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break; | |
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385 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break; |
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386 case load_mirror_id: target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break; |
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387 case load_appendix_id: target = Runtime1::entry_for(Runtime1::load_appendix_patching_id); reloc_type = relocInfo::oop_type; break; |
| 0 | 388 default: ShouldNotReachHere(); |
| 389 } | |
| 390 __ bind(call_patch); | |
| 391 | |
| 392 if (CommentedAssembly) { | |
| 393 __ block_comment("patch entry point"); | |
| 394 } | |
| 395 __ call(target, relocInfo::runtime_call_type); | |
| 396 __ delayed()->nop(); | |
| 397 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change"); | |
| 398 ce->add_call_info_here(_info); | |
| 399 __ br(Assembler::always, false, Assembler::pt, _patch_site_entry); | |
| 400 __ delayed()->nop(); | |
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401 if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) { |
| 0 | 402 CodeSection* cs = __ code_section(); |
| 403 address pc = (address)_pc_start; | |
| 404 RelocIterator iter(cs, pc, pc + 1); | |
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405 relocInfo::change_reloc_info_for_address(&iter, (address) pc, reloc_type, relocInfo::none); |
| 0 | 406 |
| 407 pc = (address)(_pc_start + NativeMovConstReg::add_offset); | |
| 408 RelocIterator iter2(cs, pc, pc+1); | |
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409 relocInfo::change_reloc_info_for_address(&iter2, (address) pc, reloc_type, relocInfo::none); |
| 0 | 410 } |
| 411 | |
| 412 } | |
| 413 | |
| 1295 | 414 |
| 415 void DeoptimizeStub::emit_code(LIR_Assembler* ce) { | |
| 416 __ bind(_entry); | |
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417 __ call(Runtime1::entry_for(Runtime1::deoptimize_id), relocInfo::runtime_call_type); |
| 1295 | 418 __ delayed()->nop(); |
| 419 ce->add_call_info_here(_info); | |
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420 DEBUG_ONLY(__ should_not_reach_here()); |
| 1295 | 421 } |
| 422 | |
| 423 | |
| 0 | 424 void ArrayCopyStub::emit_code(LIR_Assembler* ce) { |
| 425 //---------------slow case: call to native----------------- | |
| 426 __ bind(_entry); | |
| 427 __ mov(src()->as_register(), O0); | |
| 428 __ mov(src_pos()->as_register(), O1); | |
| 429 __ mov(dst()->as_register(), O2); | |
| 430 __ mov(dst_pos()->as_register(), O3); | |
| 431 __ mov(length()->as_register(), O4); | |
| 432 | |
| 433 ce->emit_static_call_stub(); | |
| 434 | |
| 435 __ call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type); | |
| 436 __ delayed()->nop(); | |
| 437 ce->add_call_info_here(info()); | |
| 438 ce->verify_oop_map(info()); | |
| 439 | |
| 440 #ifndef PRODUCT | |
| 441 __ set((intptr_t)&Runtime1::_arraycopy_slowcase_cnt, O0); | |
| 442 __ ld(O0, 0, O1); | |
| 443 __ inc(O1); | |
| 444 __ st(O1, 0, O0); | |
| 445 #endif | |
| 446 | |
| 447 __ br(Assembler::always, false, Assembler::pt, _continuation); | |
| 448 __ delayed()->nop(); | |
| 449 } | |
| 450 | |
| 451 | |
| 342 | 452 /////////////////////////////////////////////////////////////////////////////////// |
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453 #if INCLUDE_ALL_GCS |
| 342 | 454 |
| 455 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) { | |
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456 // At this point we know that marking is in progress. |
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457 // If do_load() is true then we have to emit the |
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458 // load of the previous value; otherwise it has already |
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459 // been loaded into _pre_val. |
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460 |
| 342 | 461 __ bind(_entry); |
| 462 | |
| 463 assert(pre_val()->is_register(), "Precondition."); | |
| 464 Register pre_val_reg = pre_val()->as_register(); | |
| 465 | |
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466 if (do_load()) { |
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467 ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/); |
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468 } |
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469 |
| 1848 | 470 if (__ is_in_wdisp16_range(_continuation)) { |
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471 __ br_null(pre_val_reg, /*annul*/false, Assembler::pt, _continuation); |
| 1848 | 472 } else { |
| 473 __ cmp(pre_val_reg, G0); | |
| 474 __ brx(Assembler::equal, false, Assembler::pn, _continuation); | |
| 475 } | |
| 342 | 476 __ delayed()->nop(); |
| 477 | |
| 478 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_pre_barrier_slow_id)); | |
| 479 __ delayed()->mov(pre_val_reg, G4); | |
| 480 __ br(Assembler::always, false, Assembler::pt, _continuation); | |
| 481 __ delayed()->nop(); | |
| 482 | |
| 483 } | |
| 484 | |
| 485 jbyte* G1PostBarrierStub::_byte_map_base = NULL; | |
| 486 | |
| 487 jbyte* G1PostBarrierStub::byte_map_base_slow() { | |
| 488 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 489 assert(bs->is_a(BarrierSet::G1SATBCTLogging), | |
| 490 "Must be if we're using this."); | |
| 491 return ((G1SATBCardTableModRefBS*)bs)->byte_map_base; | |
| 492 } | |
| 493 | |
| 494 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) { | |
| 495 __ bind(_entry); | |
| 496 | |
| 497 assert(addr()->is_register(), "Precondition."); | |
| 498 assert(new_val()->is_register(), "Precondition."); | |
| 499 Register addr_reg = addr()->as_pointer_register(); | |
| 500 Register new_val_reg = new_val()->as_register(); | |
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501 |
| 1848 | 502 if (__ is_in_wdisp16_range(_continuation)) { |
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503 __ br_null(new_val_reg, /*annul*/false, Assembler::pt, _continuation); |
| 1848 | 504 } else { |
| 505 __ cmp(new_val_reg, G0); | |
| 506 __ brx(Assembler::equal, false, Assembler::pn, _continuation); | |
| 507 } | |
| 342 | 508 __ delayed()->nop(); |
| 509 | |
| 510 __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_post_barrier_slow_id)); | |
| 511 __ delayed()->mov(addr_reg, G4); | |
| 512 __ br(Assembler::always, false, Assembler::pt, _continuation); | |
| 513 __ delayed()->nop(); | |
| 514 } | |
| 515 | |
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516 #endif // INCLUDE_ALL_GCS |
| 342 | 517 /////////////////////////////////////////////////////////////////////////////////// |
| 518 | |
| 0 | 519 #undef __ |