1 /*
   2  * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
   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  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  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"
  33 #include "vmreg_sparc.inline.hpp"
  34 #ifndef SERIALGC
  35 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
  36 #endif
  37 
  38 #define __ ce->masm()->
  39 
  40 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
  41                                bool throw_index_out_of_bounds_exception)
  42   : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
  43   , _index(index)
  44 {
  45   assert(info != NULL, "must have info");
  46   _info = new CodeEmitInfo(info);
  47 }
  48 
  49 
  50 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
  51   __ bind(_entry);
  52 
  53   if (_index->is_register()) {
  54     __ mov(_index->as_register(), G4);
  55   } else {
  56     __ set(_index->as_jint(), G4);
  57   }
  58   if (_throw_index_out_of_bounds_exception) {
  59     __ call(Runtime1::entry_for(Runtime1::throw_index_exception_id), relocInfo::runtime_call_type);
  60   } else {
  61     __ call(Runtime1::entry_for(Runtime1::throw_range_check_failed_id), relocInfo::runtime_call_type);
  62   }
  63   __ delayed()->nop();
  64   ce->add_call_info_here(_info);
  65   ce->verify_oop_map(_info);
  66 #ifdef ASSERT
  67   __ should_not_reach_here();
  68 #endif
  69 }
  70 
  71 
  72 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
  73   __ bind(_entry);
  74   __ set(_bci, G4);
  75   __ call(Runtime1::entry_for(Runtime1::counter_overflow_id), relocInfo::runtime_call_type);
  76   __ delayed()->mov_or_nop(_method->as_register(), G5);
  77   ce->add_call_info_here(_info);
  78   ce->verify_oop_map(_info);
  79 
  80   __ br(Assembler::always, true, Assembler::pt, _continuation);
  81   __ delayed()->nop();
  82 }
  83 
  84 
  85 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
  86   if (_offset != -1) {
  87     ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
  88   }
  89   __ bind(_entry);
  90   __ call(Runtime1::entry_for(Runtime1::throw_div0_exception_id), relocInfo::runtime_call_type);
  91   __ delayed()->nop();
  92   ce->add_call_info_here(_info);
  93   ce->verify_oop_map(_info);
  94 #ifdef ASSERT
  95   __ should_not_reach_here();
  96 #endif
  97 }
  98 
  99 
 100 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
 101   ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
 102   __ bind(_entry);
 103   __ call(Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id),
 104           relocInfo::runtime_call_type);
 105   __ delayed()->nop();
 106   ce->add_call_info_here(_info);
 107   ce->verify_oop_map(_info);
 108 #ifdef ASSERT
 109   __ should_not_reach_here();
 110 #endif
 111 }
 112 
 113 
 114 // Implementation of SimpleExceptionStub
 115 // Note: %g1 and %g3 are already in use
 116 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
 117   __ bind(_entry);
 118   __ call(Runtime1::entry_for(_stub), relocInfo::runtime_call_type);
 119 
 120   if (_obj->is_valid()) {
 121     __ delayed()->mov(_obj->as_register(), G4); // _obj contains the optional argument to the stub
 122   } else {
 123     __ delayed()->mov(G0, G4);
 124   }
 125   ce->add_call_info_here(_info);
 126 #ifdef ASSERT
 127   __ should_not_reach_here();
 128 #endif
 129 }
 130 
 131 
 132 // Implementation of NewInstanceStub
 133 
 134 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
 135   _result = result;
 136   _klass = klass;
 137   _klass_reg = klass_reg;
 138   _info = new CodeEmitInfo(info);
 139   assert(stub_id == Runtime1::new_instance_id                 ||
 140          stub_id == Runtime1::fast_new_instance_id            ||
 141          stub_id == Runtime1::fast_new_instance_init_check_id,
 142          "need new_instance id");
 143   _stub_id   = stub_id;
 144 }
 145 
 146 
 147 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
 148   __ bind(_entry);
 149   __ call(Runtime1::entry_for(_stub_id), relocInfo::runtime_call_type);
 150   __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
 151   ce->add_call_info_here(_info);
 152   ce->verify_oop_map(_info);
 153   __ br(Assembler::always, false, Assembler::pt, _continuation);
 154   __ delayed()->mov_or_nop(O0, _result->as_register());
 155 }
 156 
 157 
 158 // Implementation of NewTypeArrayStub
 159 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
 160   _klass_reg = klass_reg;
 161   _length = length;
 162   _result = result;
 163   _info = new CodeEmitInfo(info);
 164 }
 165 
 166 
 167 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
 168   __ bind(_entry);
 169 
 170   __ mov(_length->as_register(), G4);
 171   __ call(Runtime1::entry_for(Runtime1::new_type_array_id), relocInfo::runtime_call_type);
 172   __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
 173   ce->add_call_info_here(_info);
 174   ce->verify_oop_map(_info);
 175   __ br(Assembler::always, false, Assembler::pt, _continuation);
 176   __ delayed()->mov_or_nop(O0, _result->as_register());
 177 }
 178 
 179 
 180 // Implementation of NewObjectArrayStub
 181 
 182 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
 183   _klass_reg = klass_reg;
 184   _length = length;
 185   _result = result;
 186   _info = new CodeEmitInfo(info);
 187 }
 188 
 189 
 190 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
 191   __ bind(_entry);
 192 
 193   __ mov(_length->as_register(), G4);
 194   __ call(Runtime1::entry_for(Runtime1::new_object_array_id), relocInfo::runtime_call_type);
 195   __ delayed()->mov_or_nop(_klass_reg->as_register(), G5);
 196   ce->add_call_info_here(_info);
 197   ce->verify_oop_map(_info);
 198   __ br(Assembler::always, false, Assembler::pt, _continuation);
 199   __ delayed()->mov_or_nop(O0, _result->as_register());
 200 }
 201 
 202 
 203 // Implementation of MonitorAccessStubs
 204 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
 205   : MonitorAccessStub(obj_reg, lock_reg) {
 206   _info = new CodeEmitInfo(info);
 207 }
 208 
 209 
 210 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
 211   __ bind(_entry);
 212   __ mov(_obj_reg->as_register(), G4);
 213   if (ce->compilation()->has_fpu_code()) {
 214     __ call(Runtime1::entry_for(Runtime1::monitorenter_id), relocInfo::runtime_call_type);
 215   } else {
 216     __ call(Runtime1::entry_for(Runtime1::monitorenter_nofpu_id), relocInfo::runtime_call_type);
 217   }
 218   __ delayed()->mov_or_nop(_lock_reg->as_register(), G5);
 219   ce->add_call_info_here(_info);
 220   ce->verify_oop_map(_info);
 221   __ br(Assembler::always, true, Assembler::pt, _continuation);
 222   __ delayed()->nop();
 223 }
 224 
 225 
 226 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
 227   __ bind(_entry);
 228   if (_compute_lock) {
 229     ce->monitor_address(_monitor_ix, _lock_reg);
 230   }
 231   if (ce->compilation()->has_fpu_code()) {
 232     __ call(Runtime1::entry_for(Runtime1::monitorexit_id), relocInfo::runtime_call_type);
 233   } else {
 234     __ call(Runtime1::entry_for(Runtime1::monitorexit_nofpu_id), relocInfo::runtime_call_type);
 235   }
 236 
 237   __ delayed()->mov_or_nop(_lock_reg->as_register(), G4);
 238   __ br(Assembler::always, true, Assembler::pt, _continuation);
 239   __ delayed()->nop();
 240 }
 241 
 242 // Implementation of patching:
 243 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
 244 // - Replace original code with a call to the stub
 245 // At Runtime:
 246 // - call to stub, jump to runtime
 247 // - in runtime: preserve all registers (especially objects, i.e., source and destination object)
 248 // - in runtime: after initializing class, restore original code, reexecute instruction
 249 
 250 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
 251 
 252 void PatchingStub::align_patch_site(MacroAssembler* ) {
 253   // patch sites on sparc are always properly aligned.
 254 }
 255 
 256 void PatchingStub::emit_code(LIR_Assembler* ce) {
 257   // copy original code here
 258   assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF,
 259          "not enough room for call");
 260   assert((_bytes_to_copy & 0x3) == 0, "must copy a multiple of four bytes");
 261 
 262   Label call_patch;
 263 
 264   int being_initialized_entry = __ offset();
 265 
 266   if (_id == load_klass_id) {
 267     // produce a copy of the load klass instruction for use by the being initialized case
 268 #ifdef ASSERT
 269     address start = __ pc();
 270 #endif
 271     AddressLiteral addrlit(NULL, oop_Relocation::spec(_oop_index));
 272     __ patchable_set(addrlit, _obj);
 273 
 274 #ifdef ASSERT
 275     for (int i = 0; i < _bytes_to_copy; i++) {
 276       address ptr = (address)(_pc_start + i);
 277       int a_byte = (*ptr) & 0xFF;
 278       assert(a_byte == *start++, "should be the same code");
 279     }
 280 #endif
 281   } else {
 282     // make a copy the code which is going to be patched.
 283     for (int i = 0; i < _bytes_to_copy; i++) {
 284       address ptr = (address)(_pc_start + i);
 285       int a_byte = (*ptr) & 0xFF;
 286       __ a_byte (a_byte);
 287     }
 288   }
 289 
 290   address end_of_patch = __ pc();
 291   int bytes_to_skip = 0;
 292   if (_id == load_klass_id) {
 293     int offset = __ offset();
 294     if (CommentedAssembly) {
 295       __ block_comment(" being_initialized check");
 296     }
 297 
 298     // static field accesses have special semantics while the class
 299     // initializer is being run so we emit a test which can be used to
 300     // check that this code is being executed by the initializing
 301     // thread.
 302     assert(_obj != noreg, "must be a valid register");
 303     assert(_oop_index >= 0, "must have oop index");
 304     __ load_heap_oop(_obj, java_lang_Class::klass_offset_in_bytes(), G3);
 305     __ ld_ptr(G3, instanceKlass::init_thread_offset_in_bytes() + sizeof(klassOopDesc), G3);
 306     __ cmp_and_brx_short(G2_thread, G3, Assembler::notEqual, Assembler::pn, call_patch);
 307 
 308     // load_klass patches may execute the patched code before it's
 309     // copied back into place so we need to jump back into the main
 310     // code of the nmethod to continue execution.
 311     __ br(Assembler::always, false, Assembler::pt, _patch_site_continuation);
 312     __ delayed()->nop();
 313 
 314     // make sure this extra code gets skipped
 315     bytes_to_skip += __ offset() - offset;
 316   }
 317 
 318   // Now emit the patch record telling the runtime how to find the
 319   // pieces of the patch.  We only need 3 bytes but it has to be
 320   // aligned as an instruction so emit 4 bytes.
 321   int sizeof_patch_record = 4;
 322   bytes_to_skip += sizeof_patch_record;
 323 
 324   // emit the offsets needed to find the code to patch
 325   int being_initialized_entry_offset = __ offset() - being_initialized_entry + sizeof_patch_record;
 326 
 327   // Emit the patch record.  We need to emit a full word, so emit an extra empty byte
 328   __ a_byte(0);
 329   __ a_byte(being_initialized_entry_offset);
 330   __ a_byte(bytes_to_skip);
 331   __ a_byte(_bytes_to_copy);
 332   address patch_info_pc = __ pc();
 333   assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
 334 
 335   address entry = __ pc();
 336   NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
 337   address target = NULL;
 338   switch (_id) {
 339     case access_field_id:  target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
 340     case load_klass_id:    target = Runtime1::entry_for(Runtime1::load_klass_patching_id); break;
 341     default: ShouldNotReachHere();
 342   }
 343   __ bind(call_patch);
 344 
 345   if (CommentedAssembly) {
 346     __ block_comment("patch entry point");
 347   }
 348   __ call(target, relocInfo::runtime_call_type);
 349   __ delayed()->nop();
 350   assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
 351   ce->add_call_info_here(_info);
 352   __ br(Assembler::always, false, Assembler::pt, _patch_site_entry);
 353   __ delayed()->nop();
 354   if (_id == load_klass_id) {
 355     CodeSection* cs = __ code_section();
 356     address pc = (address)_pc_start;
 357     RelocIterator iter(cs, pc, pc + 1);
 358     relocInfo::change_reloc_info_for_address(&iter, (address) pc, relocInfo::oop_type, relocInfo::none);
 359 
 360     pc = (address)(_pc_start + NativeMovConstReg::add_offset);
 361     RelocIterator iter2(cs, pc, pc+1);
 362     relocInfo::change_reloc_info_for_address(&iter2, (address) pc, relocInfo::oop_type, relocInfo::none);
 363   }
 364 
 365 }
 366 
 367 
 368 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
 369   __ bind(_entry);
 370   __ call(SharedRuntime::deopt_blob()->unpack_with_reexecution());
 371   __ delayed()->nop();
 372   ce->add_call_info_here(_info);
 373   debug_only(__ should_not_reach_here());
 374 }
 375 
 376 
 377 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
 378   //---------------slow case: call to native-----------------
 379   __ bind(_entry);
 380   __ mov(src()->as_register(),     O0);
 381   __ mov(src_pos()->as_register(), O1);
 382   __ mov(dst()->as_register(),     O2);
 383   __ mov(dst_pos()->as_register(), O3);
 384   __ mov(length()->as_register(),  O4);
 385 
 386   ce->emit_static_call_stub();
 387 
 388   __ call(SharedRuntime::get_resolve_static_call_stub(), relocInfo::static_call_type);
 389   __ delayed()->nop();
 390   ce->add_call_info_here(info());
 391   ce->verify_oop_map(info());
 392 
 393 #ifndef PRODUCT
 394   __ set((intptr_t)&Runtime1::_arraycopy_slowcase_cnt, O0);
 395   __ ld(O0, 0, O1);
 396   __ inc(O1);
 397   __ st(O1, 0, O0);
 398 #endif
 399 
 400   __ br(Assembler::always, false, Assembler::pt, _continuation);
 401   __ delayed()->nop();
 402 }
 403 
 404 
 405 ///////////////////////////////////////////////////////////////////////////////////
 406 #ifndef SERIALGC
 407 
 408 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
 409   // At this point we know that marking is in progress.
 410   // If do_load() is true then we have to emit the
 411   // load of the previous value; otherwise it has already
 412   // been loaded into _pre_val.
 413 
 414   __ bind(_entry);
 415 
 416   assert(pre_val()->is_register(), "Precondition.");
 417   Register pre_val_reg = pre_val()->as_register();
 418 
 419   if (do_load()) {
 420     ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/);
 421   }
 422 
 423   if (__ is_in_wdisp16_range(_continuation)) {
 424     __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
 425                       pre_val_reg, _continuation);
 426   } else {
 427     __ cmp(pre_val_reg, G0);
 428     __ brx(Assembler::equal, false, Assembler::pn, _continuation);
 429   }
 430   __ delayed()->nop();
 431 
 432   __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_pre_barrier_slow_id));
 433   __ delayed()->mov(pre_val_reg, G4);
 434   __ br(Assembler::always, false, Assembler::pt, _continuation);
 435   __ delayed()->nop();
 436 
 437 }
 438 
 439 void G1UnsafeGetObjSATBBarrierStub::emit_code(LIR_Assembler* ce) {
 440   // At this point we know that offset == referent_offset.
 441   //
 442   // So we might have to emit:
 443   //   if (src == null) goto continuation.
 444   //
 445   // and we definitely have to emit:
 446   //   if (klass(src).reference_type == REF_NONE) goto continuation
 447   //   if (!marking_active) goto continuation
 448   //   if (pre_val == null) goto continuation
 449   //   call pre_barrier(pre_val)
 450   //   goto continuation
 451   //
 452   __ bind(_entry);
 453 
 454   assert(src()->is_register(), "sanity");
 455   Register src_reg = src()->as_register();
 456 
 457   if (gen_src_check()) {
 458     // The original src operand was not a constant.
 459     // Generate src == null?
 460     if (__ is_in_wdisp16_range(_continuation)) {
 461       __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
 462                         src_reg, _continuation);
 463     } else {
 464       __ cmp(src_reg, G0);
 465       __ brx(Assembler::equal, false, Assembler::pt, _continuation);
 466     }
 467     __ delayed()->nop();
 468   }
 469 
 470   // Generate src->_klass->_reference_type() == REF_NONE)?
 471   assert(tmp()->is_register(), "sanity");
 472   Register tmp_reg = tmp()->as_register();
 473 
 474   __ load_klass(src_reg, tmp_reg);
 475 
 476   Address ref_type_adr(tmp_reg, instanceKlass::reference_type_offset_in_bytes() + sizeof(oopDesc));
 477   __ ld(ref_type_adr, tmp_reg);
 478 
 479   if (__ is_in_wdisp16_range(_continuation)) {
 480     __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
 481                       tmp_reg, _continuation);
 482   } else {
 483     __ cmp(tmp_reg, G0);
 484     __ brx(Assembler::equal, false, Assembler::pt, _continuation);
 485   }
 486   __ delayed()->nop();
 487 
 488   // Is marking active?
 489   assert(thread()->is_register(), "precondition");
 490   Register thread_reg = thread()->as_pointer_register();
 491 
 492   Address in_progress(thread_reg, in_bytes(JavaThread::satb_mark_queue_offset() +
 493                                        PtrQueue::byte_offset_of_active()));
 494 
 495   if (in_bytes(PtrQueue::byte_width_of_active()) == 4) {
 496     __ ld(in_progress, tmp_reg);
 497   } else {
 498     assert(in_bytes(PtrQueue::byte_width_of_active()) == 1, "Assumption");
 499     __ ldsb(in_progress, tmp_reg);
 500   }
 501   if (__ is_in_wdisp16_range(_continuation)) {
 502     __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
 503                       tmp_reg, _continuation);
 504   } else {
 505     __ cmp(tmp_reg, G0);
 506     __ brx(Assembler::equal, false, Assembler::pt, _continuation);
 507   }
 508   __ delayed()->nop();
 509 
 510   // val == null?
 511   assert(val()->is_register(), "Precondition.");
 512   Register val_reg = val()->as_register();
 513 
 514   if (__ is_in_wdisp16_range(_continuation)) {
 515     __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
 516                       val_reg, _continuation);
 517   } else {
 518     __ cmp(val_reg, G0);
 519     __ brx(Assembler::equal, false, Assembler::pt, _continuation);
 520   }
 521   __ delayed()->nop();
 522 
 523   __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_pre_barrier_slow_id));
 524   __ delayed()->mov(val_reg, G4);
 525   __ br(Assembler::always, false, Assembler::pt, _continuation);
 526   __ delayed()->nop();
 527 }
 528 
 529 jbyte* G1PostBarrierStub::_byte_map_base = NULL;
 530 
 531 jbyte* G1PostBarrierStub::byte_map_base_slow() {
 532   BarrierSet* bs = Universe::heap()->barrier_set();
 533   assert(bs->is_a(BarrierSet::G1SATBCTLogging),
 534          "Must be if we're using this.");
 535   return ((G1SATBCardTableModRefBS*)bs)->byte_map_base;
 536 }
 537 
 538 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
 539   __ bind(_entry);
 540 
 541   assert(addr()->is_register(), "Precondition.");
 542   assert(new_val()->is_register(), "Precondition.");
 543   Register addr_reg = addr()->as_pointer_register();
 544   Register new_val_reg = new_val()->as_register();
 545   if (__ is_in_wdisp16_range(_continuation)) {
 546     __ br_on_reg_cond(Assembler::rc_z, /*annul*/false, Assembler::pt,
 547                       new_val_reg, _continuation);
 548   } else {
 549     __ cmp(new_val_reg, G0);
 550     __ brx(Assembler::equal, false, Assembler::pn, _continuation);
 551   }
 552   __ delayed()->nop();
 553 
 554   __ call(Runtime1::entry_for(Runtime1::Runtime1::g1_post_barrier_slow_id));
 555   __ delayed()->mov(addr_reg, G4);
 556   __ br(Assembler::always, false, Assembler::pt, _continuation);
 557   __ delayed()->nop();
 558 }
 559 
 560 #endif // SERIALGC
 561 ///////////////////////////////////////////////////////////////////////////////////
 562 
 563 #undef __