Mercurial > hg > graal-compiler
annotate src/cpu/x86/vm/c1_CodeStubs_x86.cpp @ 1819:f02a8bbe6ed4
6986046: C1 valuestack cleanup
Summary: fixes an historical oddity in C1 with inlining where all of the expression stacks are kept in the topmost ValueStack instead of being in their respective ValueStacks.
Reviewed-by: never
Contributed-by: Christian Wimmer <cwimmer@uci.edu>
| author | roland |
|---|---|
| date | Tue, 29 Dec 2009 19:08:54 +0100 |
| parents | d5d065957597 |
| children | 07a218de38cb |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 1999, 2010, 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 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_c1_CodeStubs_x86.cpp.incl" | |
| 27 | |
| 28 | |
| 29 #define __ ce->masm()-> | |
| 30 | |
| 31 float ConversionStub::float_zero = 0.0; | |
| 32 double ConversionStub::double_zero = 0.0; | |
| 33 | |
| 34 void ConversionStub::emit_code(LIR_Assembler* ce) { | |
| 35 __ bind(_entry); | |
| 36 assert(bytecode() == Bytecodes::_f2i || bytecode() == Bytecodes::_d2i, "other conversions do not require stub"); | |
| 37 | |
| 38 | |
| 39 if (input()->is_single_xmm()) { | |
| 40 __ comiss(input()->as_xmm_float_reg(), | |
| 41 ExternalAddress((address)&float_zero)); | |
| 42 } else if (input()->is_double_xmm()) { | |
| 43 __ comisd(input()->as_xmm_double_reg(), | |
| 44 ExternalAddress((address)&double_zero)); | |
| 45 } else { | |
| 304 | 46 LP64_ONLY(ShouldNotReachHere()); |
| 47 __ push(rax); | |
| 0 | 48 __ ftst(); |
| 49 __ fnstsw_ax(); | |
| 50 __ sahf(); | |
| 304 | 51 __ pop(rax); |
| 0 | 52 } |
| 53 | |
| 54 Label NaN, do_return; | |
| 55 __ jccb(Assembler::parity, NaN); | |
| 56 __ jccb(Assembler::below, do_return); | |
| 57 | |
| 58 // input is > 0 -> return maxInt | |
| 59 // result register already contains 0x80000000, so subtracting 1 gives 0x7fffffff | |
| 60 __ decrement(result()->as_register()); | |
| 61 __ jmpb(do_return); | |
| 62 | |
| 63 // input is NaN -> return 0 | |
| 64 __ bind(NaN); | |
| 304 | 65 __ xorptr(result()->as_register(), result()->as_register()); |
| 0 | 66 |
| 67 __ bind(do_return); | |
| 68 __ jmp(_continuation); | |
| 69 } | |
| 70 | |
| 71 void CounterOverflowStub::emit_code(LIR_Assembler* ce) { | |
| 72 __ bind(_entry); | |
| 1783 | 73 ce->store_parameter(_method->as_register(), 1); |
| 0 | 74 ce->store_parameter(_bci, 0); |
| 75 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id))); | |
| 76 ce->add_call_info_here(_info); | |
| 77 ce->verify_oop_map(_info); | |
| 78 __ jmp(_continuation); | |
| 79 } | |
| 80 | |
| 81 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, | |
| 82 bool throw_index_out_of_bounds_exception) | |
| 83 : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception) | |
| 84 , _index(index) | |
| 85 { | |
| 1819 | 86 assert(info != NULL, "must have info"); |
| 87 _info = new CodeEmitInfo(info); | |
| 0 | 88 } |
| 89 | |
| 90 | |
| 91 void RangeCheckStub::emit_code(LIR_Assembler* ce) { | |
| 92 __ bind(_entry); | |
| 93 // pass the array index on stack because all registers must be preserved | |
| 94 if (_index->is_cpu_register()) { | |
| 95 ce->store_parameter(_index->as_register(), 0); | |
| 96 } else { | |
| 97 ce->store_parameter(_index->as_jint(), 0); | |
| 98 } | |
| 99 Runtime1::StubID stub_id; | |
| 100 if (_throw_index_out_of_bounds_exception) { | |
| 101 stub_id = Runtime1::throw_index_exception_id; | |
| 102 } else { | |
| 103 stub_id = Runtime1::throw_range_check_failed_id; | |
| 104 } | |
| 105 __ call(RuntimeAddress(Runtime1::entry_for(stub_id))); | |
| 106 ce->add_call_info_here(_info); | |
| 107 debug_only(__ should_not_reach_here()); | |
| 108 } | |
| 109 | |
| 110 | |
| 111 void DivByZeroStub::emit_code(LIR_Assembler* ce) { | |
| 112 if (_offset != -1) { | |
| 113 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); | |
| 114 } | |
| 115 __ bind(_entry); | |
| 116 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_div0_exception_id))); | |
| 117 ce->add_call_info_here(_info); | |
| 118 debug_only(__ should_not_reach_here()); | |
| 119 } | |
| 120 | |
| 121 | |
| 122 // Implementation of NewInstanceStub | |
| 123 | |
| 124 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) { | |
| 125 _result = result; | |
| 126 _klass = klass; | |
| 127 _klass_reg = klass_reg; | |
| 128 _info = new CodeEmitInfo(info); | |
| 129 assert(stub_id == Runtime1::new_instance_id || | |
| 130 stub_id == Runtime1::fast_new_instance_id || | |
| 131 stub_id == Runtime1::fast_new_instance_init_check_id, | |
| 132 "need new_instance id"); | |
| 133 _stub_id = stub_id; | |
| 134 } | |
| 135 | |
| 136 | |
| 137 void NewInstanceStub::emit_code(LIR_Assembler* ce) { | |
| 138 assert(__ rsp_offset() == 0, "frame size should be fixed"); | |
| 139 __ bind(_entry); | |
| 304 | 140 __ movptr(rdx, _klass_reg->as_register()); |
| 0 | 141 __ call(RuntimeAddress(Runtime1::entry_for(_stub_id))); |
| 142 ce->add_call_info_here(_info); | |
| 143 ce->verify_oop_map(_info); | |
| 144 assert(_result->as_register() == rax, "result must in rax,"); | |
| 145 __ jmp(_continuation); | |
| 146 } | |
| 147 | |
| 148 | |
| 149 // Implementation of NewTypeArrayStub | |
| 150 | |
| 151 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { | |
| 152 _klass_reg = klass_reg; | |
| 153 _length = length; | |
| 154 _result = result; | |
| 155 _info = new CodeEmitInfo(info); | |
| 156 } | |
| 157 | |
| 158 | |
| 159 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) { | |
| 160 assert(__ rsp_offset() == 0, "frame size should be fixed"); | |
| 161 __ bind(_entry); | |
| 162 assert(_length->as_register() == rbx, "length must in rbx,"); | |
| 163 assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx"); | |
| 164 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id))); | |
| 165 ce->add_call_info_here(_info); | |
| 166 ce->verify_oop_map(_info); | |
| 167 assert(_result->as_register() == rax, "result must in rax,"); | |
| 168 __ jmp(_continuation); | |
| 169 } | |
| 170 | |
| 171 | |
| 172 // Implementation of NewObjectArrayStub | |
| 173 | |
| 174 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) { | |
| 175 _klass_reg = klass_reg; | |
| 176 _result = result; | |
| 177 _length = length; | |
| 178 _info = new CodeEmitInfo(info); | |
| 179 } | |
| 180 | |
| 181 | |
| 182 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) { | |
| 183 assert(__ rsp_offset() == 0, "frame size should be fixed"); | |
| 184 __ bind(_entry); | |
| 185 assert(_length->as_register() == rbx, "length must in rbx,"); | |
| 186 assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx"); | |
| 187 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id))); | |
| 188 ce->add_call_info_here(_info); | |
| 189 ce->verify_oop_map(_info); | |
| 190 assert(_result->as_register() == rax, "result must in rax,"); | |
| 191 __ jmp(_continuation); | |
| 192 } | |
| 193 | |
| 194 | |
| 195 // Implementation of MonitorAccessStubs | |
| 196 | |
| 197 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info) | |
| 198 : MonitorAccessStub(obj_reg, lock_reg) | |
| 199 { | |
| 200 _info = new CodeEmitInfo(info); | |
| 201 } | |
| 202 | |
| 203 | |
| 204 void MonitorEnterStub::emit_code(LIR_Assembler* ce) { | |
| 205 assert(__ rsp_offset() == 0, "frame size should be fixed"); | |
| 206 __ bind(_entry); | |
| 207 ce->store_parameter(_obj_reg->as_register(), 1); | |
| 208 ce->store_parameter(_lock_reg->as_register(), 0); | |
| 209 Runtime1::StubID enter_id; | |
| 210 if (ce->compilation()->has_fpu_code()) { | |
| 211 enter_id = Runtime1::monitorenter_id; | |
| 212 } else { | |
| 213 enter_id = Runtime1::monitorenter_nofpu_id; | |
| 214 } | |
| 215 __ call(RuntimeAddress(Runtime1::entry_for(enter_id))); | |
| 216 ce->add_call_info_here(_info); | |
| 217 ce->verify_oop_map(_info); | |
| 218 __ jmp(_continuation); | |
| 219 } | |
| 220 | |
| 221 | |
| 222 void MonitorExitStub::emit_code(LIR_Assembler* ce) { | |
| 223 __ bind(_entry); | |
| 224 if (_compute_lock) { | |
| 225 // lock_reg was destroyed by fast unlocking attempt => recompute it | |
| 226 ce->monitor_address(_monitor_ix, _lock_reg); | |
| 227 } | |
| 228 ce->store_parameter(_lock_reg->as_register(), 0); | |
| 229 // note: non-blocking leaf routine => no call info needed | |
| 230 Runtime1::StubID exit_id; | |
| 231 if (ce->compilation()->has_fpu_code()) { | |
| 232 exit_id = Runtime1::monitorexit_id; | |
| 233 } else { | |
| 234 exit_id = Runtime1::monitorexit_nofpu_id; | |
| 235 } | |
| 236 __ call(RuntimeAddress(Runtime1::entry_for(exit_id))); | |
| 237 __ jmp(_continuation); | |
| 238 } | |
| 239 | |
| 240 | |
| 241 // Implementation of patching: | |
| 242 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes) | |
| 243 // - Replace original code with a call to the stub | |
| 244 // At Runtime: | |
| 245 // - call to stub, jump to runtime | |
| 246 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object) | |
| 247 // - in runtime: after initializing class, restore original code, reexecute instruction | |
| 248 | |
| 249 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size; | |
| 250 | |
| 251 void PatchingStub::align_patch_site(MacroAssembler* masm) { | |
| 252 // We're patching a 5-7 byte instruction on intel and we need to | |
| 253 // make sure that we don't see a piece of the instruction. It | |
| 254 // appears mostly impossible on Intel to simply invalidate other | |
| 255 // processors caches and since they may do aggressive prefetch it's | |
| 256 // very hard to make a guess about what code might be in the icache. | |
| 257 // Force the instruction to be double word aligned so that it | |
| 258 // doesn't span a cache line. | |
| 259 masm->align(round_to(NativeGeneralJump::instruction_size, wordSize)); | |
| 260 } | |
| 261 | |
| 262 void PatchingStub::emit_code(LIR_Assembler* ce) { | |
| 263 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, "not enough room for call"); | |
| 264 | |
| 265 Label call_patch; | |
| 266 | |
| 267 // static field accesses have special semantics while the class | |
| 268 // initializer is being run so we emit a test which can be used to | |
| 269 // check that this code is being executed by the initializing | |
| 270 // thread. | |
| 271 address being_initialized_entry = __ pc(); | |
| 272 if (CommentedAssembly) { | |
| 273 __ block_comment(" patch template"); | |
| 274 } | |
| 275 if (_id == load_klass_id) { | |
| 276 // produce a copy of the load klass instruction for use by the being initialized case | |
| 277 address start = __ pc(); | |
| 278 jobject o = NULL; | |
| 279 __ movoop(_obj, o); | |
| 280 #ifdef ASSERT | |
| 281 for (int i = 0; i < _bytes_to_copy; i++) { | |
| 282 address ptr = (address)(_pc_start + i); | |
| 283 int a_byte = (*ptr) & 0xFF; | |
| 284 assert(a_byte == *start++, "should be the same code"); | |
| 285 } | |
| 286 #endif | |
| 287 } else { | |
| 288 // make a copy the code which is going to be patched. | |
| 289 for ( int i = 0; i < _bytes_to_copy; i++) { | |
| 290 address ptr = (address)(_pc_start + i); | |
| 291 int a_byte = (*ptr) & 0xFF; | |
| 292 __ a_byte (a_byte); | |
| 293 *ptr = 0x90; // make the site look like a nop | |
| 294 } | |
| 295 } | |
| 296 | |
| 297 address end_of_patch = __ pc(); | |
| 298 int bytes_to_skip = 0; | |
| 299 if (_id == load_klass_id) { | |
| 300 int offset = __ offset(); | |
| 301 if (CommentedAssembly) { | |
| 302 __ block_comment(" being_initialized check"); | |
| 303 } | |
| 304 assert(_obj != noreg, "must be a valid register"); | |
| 305 Register tmp = rax; | |
| 306 if (_obj == tmp) tmp = rbx; | |
| 304 | 307 __ push(tmp); |
| 0 | 308 __ get_thread(tmp); |
| 304 | 309 __ cmpptr(tmp, Address(_obj, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc))); |
| 310 __ pop(tmp); | |
| 0 | 311 __ jcc(Assembler::notEqual, call_patch); |
| 312 | |
| 313 // access_field patches may execute the patched code before it's | |
| 314 // copied back into place so we need to jump back into the main | |
| 315 // code of the nmethod to continue execution. | |
| 316 __ jmp(_patch_site_continuation); | |
| 317 | |
| 318 // make sure this extra code gets skipped | |
| 319 bytes_to_skip += __ offset() - offset; | |
| 320 } | |
| 321 if (CommentedAssembly) { | |
| 322 __ block_comment("patch data encoded as movl"); | |
| 323 } | |
| 324 // Now emit the patch record telling the runtime how to find the | |
| 325 // pieces of the patch. We only need 3 bytes but for readability of | |
| 326 // the disassembly we make the data look like a movl reg, imm32, | |
| 327 // which requires 5 bytes | |
| 328 int sizeof_patch_record = 5; | |
| 329 bytes_to_skip += sizeof_patch_record; | |
| 330 | |
| 331 // emit the offsets needed to find the code to patch | |
| 332 int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record; | |
| 333 | |
| 334 __ a_byte(0xB8); | |
| 335 __ a_byte(0); | |
| 336 __ a_byte(being_initialized_entry_offset); | |
| 337 __ a_byte(bytes_to_skip); | |
| 338 __ a_byte(_bytes_to_copy); | |
| 339 address patch_info_pc = __ pc(); | |
| 340 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info"); | |
| 341 | |
| 342 address entry = __ pc(); | |
| 343 NativeGeneralJump::insert_unconditional((address)_pc_start, entry); | |
| 344 address target = NULL; | |
| 345 switch (_id) { | |
| 346 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break; | |
| 347 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); break; | |
| 348 default: ShouldNotReachHere(); | |
| 349 } | |
| 350 __ bind(call_patch); | |
| 351 | |
| 352 if (CommentedAssembly) { | |
| 353 __ block_comment("patch entry point"); | |
| 354 } | |
| 355 __ call(RuntimeAddress(target)); | |
| 356 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change"); | |
| 357 ce->add_call_info_here(_info); | |
| 358 int jmp_off = __ offset(); | |
| 359 __ jmp(_patch_site_entry); | |
| 360 // Add enough nops so deoptimization can overwrite the jmp above with a call | |
| 361 // and not destroy the world. | |
| 362 for (int j = __ offset() ; j < jmp_off + 5 ; j++ ) { | |
| 363 __ nop(); | |
| 364 } | |
| 365 if (_id == load_klass_id) { | |
| 366 CodeSection* cs = __ code_section(); | |
| 367 RelocIterator iter(cs, (address)_pc_start, (address)(_pc_start + 1)); | |
| 368 relocInfo::change_reloc_info_for_address(&iter, (address) _pc_start, relocInfo::oop_type, relocInfo::none); | |
| 369 } | |
| 370 } | |
| 371 | |
| 372 | |
| 1295 | 373 void DeoptimizeStub::emit_code(LIR_Assembler* ce) { |
| 374 __ bind(_entry); | |
| 375 __ call(RuntimeAddress(SharedRuntime::deopt_blob()->unpack_with_reexecution())); | |
| 376 ce->add_call_info_here(_info); | |
| 377 debug_only(__ should_not_reach_here()); | |
| 378 } | |
| 379 | |
| 380 | |
| 0 | 381 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) { |
| 382 ce->compilation()->implicit_exception_table()->append(_offset, __ offset()); | |
| 383 __ bind(_entry); | |
| 384 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id))); | |
| 385 ce->add_call_info_here(_info); | |
| 386 debug_only(__ should_not_reach_here()); | |
| 387 } | |
| 388 | |
| 389 | |
| 390 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) { | |
| 391 assert(__ rsp_offset() == 0, "frame size should be fixed"); | |
| 392 | |
| 393 __ bind(_entry); | |
| 394 // pass the object on stack because all registers must be preserved | |
| 395 if (_obj->is_cpu_register()) { | |
| 396 ce->store_parameter(_obj->as_register(), 0); | |
| 397 } | |
| 398 __ call(RuntimeAddress(Runtime1::entry_for(_stub))); | |
| 399 ce->add_call_info_here(_info); | |
| 400 debug_only(__ should_not_reach_here()); | |
| 401 } | |
| 402 | |
| 403 | |
| 404 ArrayStoreExceptionStub::ArrayStoreExceptionStub(CodeEmitInfo* info): | |
| 405 _info(info) { | |
| 406 } | |
| 407 | |
| 408 | |
| 409 void ArrayStoreExceptionStub::emit_code(LIR_Assembler* ce) { | |
| 410 assert(__ rsp_offset() == 0, "frame size should be fixed"); | |
| 411 __ bind(_entry); | |
| 412 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_array_store_exception_id))); | |
| 413 ce->add_call_info_here(_info); | |
| 414 debug_only(__ should_not_reach_here()); | |
| 415 } | |
| 416 | |
| 417 | |
| 418 void ArrayCopyStub::emit_code(LIR_Assembler* ce) { | |
| 419 //---------------slow case: call to native----------------- | |
| 420 __ bind(_entry); | |
| 421 // Figure out where the args should go | |
| 422 // This should really convert the IntrinsicID to the methodOop and signature | |
| 423 // but I don't know how to do that. | |
| 424 // | |
| 425 VMRegPair args[5]; | |
| 426 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT}; | |
| 427 SharedRuntime::java_calling_convention(signature, args, 5, true); | |
| 428 | |
| 429 // push parameters | |
| 430 // (src, src_pos, dest, destPos, length) | |
| 431 Register r[5]; | |
| 432 r[0] = src()->as_register(); | |
| 433 r[1] = src_pos()->as_register(); | |
| 434 r[2] = dst()->as_register(); | |
| 435 r[3] = dst_pos()->as_register(); | |
| 436 r[4] = length()->as_register(); | |
| 437 | |
| 438 // next registers will get stored on the stack | |
| 439 for (int i = 0; i < 5 ; i++ ) { | |
| 440 VMReg r_1 = args[i].first(); | |
| 441 if (r_1->is_stack()) { | |
| 442 int st_off = r_1->reg2stack() * wordSize; | |
| 304 | 443 __ movptr (Address(rsp, st_off), r[i]); |
| 0 | 444 } else { |
| 445 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg "); | |
| 446 } | |
| 447 } | |
| 448 | |
| 449 ce->align_call(lir_static_call); | |
| 450 | |
| 451 ce->emit_static_call_stub(); | |
| 452 AddressLiteral resolve(SharedRuntime::get_resolve_static_call_stub(), | |
| 453 relocInfo::static_call_type); | |
| 454 __ call(resolve); | |
| 455 ce->add_call_info_here(info()); | |
| 456 | |
| 457 #ifndef PRODUCT | |
| 304 | 458 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt)); |
| 0 | 459 #endif |
| 460 | |
| 461 __ jmp(_continuation); | |
| 462 } | |
| 463 | |
| 342 | 464 ///////////////////////////////////////////////////////////////////////////// |
| 465 #ifndef SERIALGC | |
| 466 | |
| 467 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) { | |
| 468 | |
| 469 // At this point we know that marking is in progress | |
| 470 | |
| 471 __ bind(_entry); | |
| 472 assert(pre_val()->is_register(), "Precondition."); | |
| 473 | |
| 474 Register pre_val_reg = pre_val()->as_register(); | |
| 475 | |
| 476 ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false); | |
| 477 | |
| 362 | 478 __ cmpptr(pre_val_reg, (int32_t) NULL_WORD); |
| 342 | 479 __ jcc(Assembler::equal, _continuation); |
| 480 ce->store_parameter(pre_val()->as_register(), 0); | |
| 481 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id))); | |
| 482 __ jmp(_continuation); | |
| 483 | |
| 484 } | |
| 485 | |
| 486 jbyte* G1PostBarrierStub::_byte_map_base = NULL; | |
| 487 | |
| 488 jbyte* G1PostBarrierStub::byte_map_base_slow() { | |
| 489 BarrierSet* bs = Universe::heap()->barrier_set(); | |
| 490 assert(bs->is_a(BarrierSet::G1SATBCTLogging), | |
| 491 "Must be if we're using this."); | |
| 492 return ((G1SATBCardTableModRefBS*)bs)->byte_map_base; | |
| 493 } | |
| 494 | |
| 495 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) { | |
| 496 __ bind(_entry); | |
| 497 assert(addr()->is_register(), "Precondition."); | |
| 498 assert(new_val()->is_register(), "Precondition."); | |
| 499 Register new_val_reg = new_val()->as_register(); | |
| 362 | 500 __ cmpptr(new_val_reg, (int32_t) NULL_WORD); |
| 342 | 501 __ jcc(Assembler::equal, _continuation); |
| 502 ce->store_parameter(addr()->as_register(), 0); | |
| 503 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_post_barrier_slow_id))); | |
| 504 __ jmp(_continuation); | |
| 505 } | |
| 506 | |
| 507 #endif // SERIALGC | |
| 508 ///////////////////////////////////////////////////////////////////////////// | |
| 0 | 509 |
| 510 #undef __ |