rev 4136 : 7153771: array bound check elimination for c1
Summary: when possible optimize out array bound checks, inserting predicates when needed.
Reviewed-by:

   1 /*
   2  * Copyright (c) 1999, 2012, 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_x86.hpp"
  32 #include "runtime/sharedRuntime.hpp"
  33 #include "utilities/macros.hpp"
  34 #include "vmreg_x86.inline.hpp"
  35 #if INCLUDE_ALL_GCS
  36 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
  37 #endif // INCLUDE_ALL_GCS
  38 
  39 
  40 #define __ ce->masm()->
  41 
  42 float ConversionStub::float_zero = 0.0;
  43 double ConversionStub::double_zero = 0.0;
  44 
  45 void ConversionStub::emit_code(LIR_Assembler* ce) {
  46   __ bind(_entry);
  47   assert(bytecode() == Bytecodes::_f2i || bytecode() == Bytecodes::_d2i, "other conversions do not require stub");
  48 
  49 
  50   if (input()->is_single_xmm()) {
  51     __ comiss(input()->as_xmm_float_reg(),
  52               ExternalAddress((address)&float_zero));
  53   } else if (input()->is_double_xmm()) {
  54     __ comisd(input()->as_xmm_double_reg(),
  55               ExternalAddress((address)&double_zero));
  56   } else {
  57     LP64_ONLY(ShouldNotReachHere());
  58     __ push(rax);
  59     __ ftst();
  60     __ fnstsw_ax();
  61     __ sahf();
  62     __ pop(rax);
  63   }
  64 
  65   Label NaN, do_return;
  66   __ jccb(Assembler::parity, NaN);
  67   __ jccb(Assembler::below, do_return);
  68 
  69   // input is > 0 -> return maxInt
  70   // result register already contains 0x80000000, so subtracting 1 gives 0x7fffffff
  71   __ decrement(result()->as_register());
  72   __ jmpb(do_return);
  73 
  74   // input is NaN -> return 0
  75   __ bind(NaN);
  76   __ xorptr(result()->as_register(), result()->as_register());
  77 
  78   __ bind(do_return);
  79   __ jmp(_continuation);
  80 }
  81 
  82 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
  83   __ bind(_entry);
  84   ce->store_parameter(_method->as_register(), 1);
  85   ce->store_parameter(_bci, 0);
  86   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));
  87   ce->add_call_info_here(_info);
  88   ce->verify_oop_map(_info);
  89   __ jmp(_continuation);
  90 }
  91 
  92 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
  93                                bool throw_index_out_of_bounds_exception)
  94   : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
  95   , _index(index)
  96 {
  97   assert(info != NULL, "must have info");
  98   _info = new CodeEmitInfo(info);
  99 }
 100 
 101 
 102 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
 103   __ bind(_entry);
 104   if (_info->deoptimize_on_exception()) {
 105     address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
 106     __ call(RuntimeAddress(a));
 107     ce->add_call_info_here(_info);
 108     debug_only(__ should_not_reach_here());
 109     return;
 110   }
 111 
 112   // pass the array index on stack because all registers must be preserved
 113   if (_index->is_cpu_register()) {
 114     ce->store_parameter(_index->as_register(), 0);
 115   } else {
 116     ce->store_parameter(_index->as_jint(), 0);
 117   }
 118   Runtime1::StubID stub_id;
 119   if (_throw_index_out_of_bounds_exception) {
 120     stub_id = Runtime1::throw_index_exception_id;
 121   } else {
 122     stub_id = Runtime1::throw_range_check_failed_id;
 123   }
 124   __ call(RuntimeAddress(Runtime1::entry_for(stub_id)));
 125   ce->add_call_info_here(_info);
 126   debug_only(__ should_not_reach_here());
 127 }
 128 
 129 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) { 
 130   _info = new CodeEmitInfo(info);
 131 }
 132 
 133 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
 134   __ bind(_entry); 
 135   address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
 136   __ call(RuntimeAddress(a));
 137   ce->add_call_info_here(_info);
 138   ce->verify_oop_map(_info); 
 139   debug_only(__ should_not_reach_here()); 
 140 }
 141 
 142 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
 143   if (_offset != -1) {
 144     ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
 145   }
 146   __ bind(_entry);
 147   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_div0_exception_id)));
 148   ce->add_call_info_here(_info);
 149   debug_only(__ should_not_reach_here());
 150 }
 151 
 152 
 153 // Implementation of NewInstanceStub
 154 
 155 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
 156   _result = result;
 157   _klass = klass;
 158   _klass_reg = klass_reg;
 159   _info = new CodeEmitInfo(info);
 160   assert(stub_id == Runtime1::new_instance_id                 ||
 161          stub_id == Runtime1::fast_new_instance_id            ||
 162          stub_id == Runtime1::fast_new_instance_init_check_id,
 163          "need new_instance id");
 164   _stub_id   = stub_id;
 165 }
 166 
 167 
 168 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
 169   assert(__ rsp_offset() == 0, "frame size should be fixed");
 170   __ bind(_entry);
 171   __ movptr(rdx, _klass_reg->as_register());
 172   __ call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
 173   ce->add_call_info_here(_info);
 174   ce->verify_oop_map(_info);
 175   assert(_result->as_register() == rax, "result must in rax,");
 176   __ jmp(_continuation);
 177 }
 178 
 179 
 180 // Implementation of NewTypeArrayStub
 181 
 182 NewTypeArrayStub::NewTypeArrayStub(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 NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
 191   assert(__ rsp_offset() == 0, "frame size should be fixed");
 192   __ bind(_entry);
 193   assert(_length->as_register() == rbx, "length must in rbx,");
 194   assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
 195   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
 196   ce->add_call_info_here(_info);
 197   ce->verify_oop_map(_info);
 198   assert(_result->as_register() == rax, "result must in rax,");
 199   __ jmp(_continuation);
 200 }
 201 
 202 
 203 // Implementation of NewObjectArrayStub
 204 
 205 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
 206   _klass_reg = klass_reg;
 207   _result = result;
 208   _length = length;
 209   _info = new CodeEmitInfo(info);
 210 }
 211 
 212 
 213 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
 214   assert(__ rsp_offset() == 0, "frame size should be fixed");
 215   __ bind(_entry);
 216   assert(_length->as_register() == rbx, "length must in rbx,");
 217   assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
 218   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
 219   ce->add_call_info_here(_info);
 220   ce->verify_oop_map(_info);
 221   assert(_result->as_register() == rax, "result must in rax,");
 222   __ jmp(_continuation);
 223 }
 224 
 225 
 226 // Implementation of MonitorAccessStubs
 227 
 228 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
 229 : MonitorAccessStub(obj_reg, lock_reg)
 230 {
 231   _info = new CodeEmitInfo(info);
 232 }
 233 
 234 
 235 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
 236   assert(__ rsp_offset() == 0, "frame size should be fixed");
 237   __ bind(_entry);
 238   ce->store_parameter(_obj_reg->as_register(),  1);
 239   ce->store_parameter(_lock_reg->as_register(), 0);
 240   Runtime1::StubID enter_id;
 241   if (ce->compilation()->has_fpu_code()) {
 242     enter_id = Runtime1::monitorenter_id;
 243   } else {
 244     enter_id = Runtime1::monitorenter_nofpu_id;
 245   }
 246   __ call(RuntimeAddress(Runtime1::entry_for(enter_id)));
 247   ce->add_call_info_here(_info);
 248   ce->verify_oop_map(_info);
 249   __ jmp(_continuation);
 250 }
 251 
 252 
 253 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
 254   __ bind(_entry);
 255   if (_compute_lock) {
 256     // lock_reg was destroyed by fast unlocking attempt => recompute it
 257     ce->monitor_address(_monitor_ix, _lock_reg);
 258   }
 259   ce->store_parameter(_lock_reg->as_register(), 0);
 260   // note: non-blocking leaf routine => no call info needed
 261   Runtime1::StubID exit_id;
 262   if (ce->compilation()->has_fpu_code()) {
 263     exit_id = Runtime1::monitorexit_id;
 264   } else {
 265     exit_id = Runtime1::monitorexit_nofpu_id;
 266   }
 267   __ call(RuntimeAddress(Runtime1::entry_for(exit_id)));
 268   __ jmp(_continuation);
 269 }
 270 
 271 
 272 // Implementation of patching:
 273 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
 274 // - Replace original code with a call to the stub
 275 // At Runtime:
 276 // - call to stub, jump to runtime
 277 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
 278 // - in runtime: after initializing class, restore original code, reexecute instruction
 279 
 280 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
 281 
 282 void PatchingStub::align_patch_site(MacroAssembler* masm) {
 283   // We're patching a 5-7 byte instruction on intel and we need to
 284   // make sure that we don't see a piece of the instruction.  It
 285   // appears mostly impossible on Intel to simply invalidate other
 286   // processors caches and since they may do aggressive prefetch it's
 287   // very hard to make a guess about what code might be in the icache.
 288   // Force the instruction to be double word aligned so that it
 289   // doesn't span a cache line.
 290   masm->align(round_to(NativeGeneralJump::instruction_size, wordSize));
 291 }
 292 
 293 void PatchingStub::emit_code(LIR_Assembler* ce) {
 294   assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, "not enough room for call");
 295 
 296   Label call_patch;
 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   address being_initialized_entry = __ pc();
 303   if (CommentedAssembly) {
 304     __ block_comment(" patch template");
 305   }
 306   if (_id == load_klass_id) {
 307     // produce a copy of the load klass instruction for use by the being initialized case
 308 #ifdef ASSERT
 309     address start = __ pc();
 310 #endif
 311     Metadata* o = NULL;
 312     __ mov_metadata(_obj, o);
 313 #ifdef ASSERT
 314     for (int i = 0; i < _bytes_to_copy; i++) {
 315       address ptr = (address)(_pc_start + i);
 316       int a_byte = (*ptr) & 0xFF;
 317       assert(a_byte == *start++, "should be the same code");
 318     }
 319 #endif
 320   } else if (_id == load_mirror_id) {
 321     // produce a copy of the load mirror instruction for use by the being
 322     // initialized case
 323 #ifdef ASSERT
 324     address start = __ pc();
 325 #endif
 326     jobject o = NULL;
 327     __ movoop(_obj, o);
 328 #ifdef ASSERT
 329     for (int i = 0; i < _bytes_to_copy; i++) {
 330       address ptr = (address)(_pc_start + i);
 331       int a_byte = (*ptr) & 0xFF;
 332       assert(a_byte == *start++, "should be the same code");
 333     }
 334 #endif
 335   } else {
 336     // make a copy the code which is going to be patched.
 337     for (int i = 0; i < _bytes_to_copy; i++) {
 338       address ptr = (address)(_pc_start + i);
 339       int a_byte = (*ptr) & 0xFF;
 340       __ emit_int8(a_byte);
 341       *ptr = 0x90; // make the site look like a nop
 342     }
 343   }
 344 
 345   address end_of_patch = __ pc();
 346   int bytes_to_skip = 0;
 347   if (_id == load_mirror_id) {
 348     int offset = __ offset();
 349     if (CommentedAssembly) {
 350       __ block_comment(" being_initialized check");
 351     }
 352     assert(_obj != noreg, "must be a valid register");
 353     Register tmp = rax;
 354     Register tmp2 = rbx;
 355     __ push(tmp);
 356     __ push(tmp2);
 357     // Load without verification to keep code size small. We need it because
 358     // begin_initialized_entry_offset has to fit in a byte. Also, we know it's not null.
 359     __ movptr(tmp2, Address(_obj, java_lang_Class::klass_offset_in_bytes()));
 360     __ get_thread(tmp);
 361     __ cmpptr(tmp, Address(tmp2, InstanceKlass::init_thread_offset()));
 362     __ pop(tmp2);
 363     __ pop(tmp);
 364     __ jcc(Assembler::notEqual, call_patch);
 365 
 366     // access_field patches may execute the patched code before it's
 367     // copied back into place so we need to jump back into the main
 368     // code of the nmethod to continue execution.
 369     __ jmp(_patch_site_continuation);
 370 
 371     // make sure this extra code gets skipped
 372     bytes_to_skip += __ offset() - offset;
 373   }
 374   if (CommentedAssembly) {
 375     __ block_comment("patch data encoded as movl");
 376   }
 377   // Now emit the patch record telling the runtime how to find the
 378   // pieces of the patch.  We only need 3 bytes but for readability of
 379   // the disassembly we make the data look like a movl reg, imm32,
 380   // which requires 5 bytes
 381   int sizeof_patch_record = 5;
 382   bytes_to_skip += sizeof_patch_record;
 383 
 384   // emit the offsets needed to find the code to patch
 385   int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record;
 386 
 387   __ emit_int8((unsigned char)0xB8);
 388   __ emit_int8(0);
 389   __ emit_int8(being_initialized_entry_offset);
 390   __ emit_int8(bytes_to_skip);
 391   __ emit_int8(_bytes_to_copy);
 392   address patch_info_pc = __ pc();
 393   assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
 394 
 395   address entry = __ pc();
 396   NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
 397   address target = NULL;
 398   relocInfo::relocType reloc_type = relocInfo::none;
 399   switch (_id) {
 400     case access_field_id:  target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
 401     case load_klass_id:    target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break;
 402     case load_mirror_id:   target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break;
 403     default: ShouldNotReachHere();
 404   }
 405   __ bind(call_patch);
 406 
 407   if (CommentedAssembly) {
 408     __ block_comment("patch entry point");
 409   }
 410   __ call(RuntimeAddress(target));
 411   assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
 412   ce->add_call_info_here(_info);
 413   int jmp_off = __ offset();
 414   __ jmp(_patch_site_entry);
 415   // Add enough nops so deoptimization can overwrite the jmp above with a call
 416   // and not destroy the world.
 417   for (int j = __ offset() ; j < jmp_off + 5 ; j++ ) {
 418     __ nop();
 419   }
 420   if (_id == load_klass_id || _id == load_mirror_id) {
 421     CodeSection* cs = __ code_section();
 422     RelocIterator iter(cs, (address)_pc_start, (address)(_pc_start + 1));
 423     relocInfo::change_reloc_info_for_address(&iter, (address) _pc_start, reloc_type, relocInfo::none);
 424   }
 425 }
 426 
 427 
 428 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
 429   __ bind(_entry);
 430   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
 431   ce->add_call_info_here(_info);
 432   DEBUG_ONLY(__ should_not_reach_here());
 433 }
 434 
 435 
 436 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
 437  
 438   address a;
 439   if (_info->deoptimize_on_exception()) {
 440     // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
 441     a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
 442   } else {
 443     a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
 444   }
 445 
 446   ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
 447   __ bind(_entry);
 448   __ call(RuntimeAddress(a));
 449   ce->add_call_info_here(_info);
 450   debug_only(__ should_not_reach_here());
 451 }
 452 
 453 
 454 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
 455   assert(__ rsp_offset() == 0, "frame size should be fixed");
 456 
 457   __ bind(_entry);
 458   // pass the object on stack because all registers must be preserved
 459   if (_obj->is_cpu_register()) {
 460     ce->store_parameter(_obj->as_register(), 0);
 461   }
 462   __ call(RuntimeAddress(Runtime1::entry_for(_stub)));
 463   ce->add_call_info_here(_info);
 464   debug_only(__ should_not_reach_here());
 465 }
 466 
 467 
 468 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
 469   //---------------slow case: call to native-----------------
 470   __ bind(_entry);
 471   // Figure out where the args should go
 472   // This should really convert the IntrinsicID to the Method* and signature
 473   // but I don't know how to do that.
 474   //
 475   VMRegPair args[5];
 476   BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
 477   SharedRuntime::java_calling_convention(signature, args, 5, true);
 478 
 479   // push parameters
 480   // (src, src_pos, dest, destPos, length)
 481   Register r[5];
 482   r[0] = src()->as_register();
 483   r[1] = src_pos()->as_register();
 484   r[2] = dst()->as_register();
 485   r[3] = dst_pos()->as_register();
 486   r[4] = length()->as_register();
 487 
 488   // next registers will get stored on the stack
 489   for (int i = 0; i < 5 ; i++ ) {
 490     VMReg r_1 = args[i].first();
 491     if (r_1->is_stack()) {
 492       int st_off = r_1->reg2stack() * wordSize;
 493       __ movptr (Address(rsp, st_off), r[i]);
 494     } else {
 495       assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
 496     }
 497   }
 498 
 499   ce->align_call(lir_static_call);
 500 
 501   ce->emit_static_call_stub();
 502   AddressLiteral resolve(SharedRuntime::get_resolve_static_call_stub(),
 503                          relocInfo::static_call_type);
 504   __ call(resolve);
 505   ce->add_call_info_here(info());
 506 
 507 #ifndef PRODUCT
 508   __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
 509 #endif
 510 
 511   __ jmp(_continuation);
 512 }
 513 
 514 /////////////////////////////////////////////////////////////////////////////
 515 #if INCLUDE_ALL_GCS
 516 
 517 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
 518   // At this point we know that marking is in progress.
 519   // If do_load() is true then we have to emit the
 520   // load of the previous value; otherwise it has already
 521   // been loaded into _pre_val.
 522 
 523   __ bind(_entry);
 524   assert(pre_val()->is_register(), "Precondition.");
 525 
 526   Register pre_val_reg = pre_val()->as_register();
 527 
 528   if (do_load()) {
 529     ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/);
 530   }
 531 
 532   __ cmpptr(pre_val_reg, (int32_t) NULL_WORD);
 533   __ jcc(Assembler::equal, _continuation);
 534   ce->store_parameter(pre_val()->as_register(), 0);
 535   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id)));
 536   __ jmp(_continuation);
 537 
 538 }
 539 
 540 jbyte* G1PostBarrierStub::_byte_map_base = NULL;
 541 
 542 jbyte* G1PostBarrierStub::byte_map_base_slow() {
 543   BarrierSet* bs = Universe::heap()->barrier_set();
 544   assert(bs->is_a(BarrierSet::G1SATBCTLogging),
 545          "Must be if we're using this.");
 546   return ((G1SATBCardTableModRefBS*)bs)->byte_map_base;
 547 }
 548 
 549 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
 550   __ bind(_entry);
 551   assert(addr()->is_register(), "Precondition.");
 552   assert(new_val()->is_register(), "Precondition.");
 553   Register new_val_reg = new_val()->as_register();
 554   __ cmpptr(new_val_reg, (int32_t) NULL_WORD);
 555   __ jcc(Assembler::equal, _continuation);
 556   ce->store_parameter(addr()->as_pointer_register(), 0);
 557   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_post_barrier_slow_id)));
 558   __ jmp(_continuation);
 559 }
 560 
 561 #endif // INCLUDE_ALL_GCS
 562 /////////////////////////////////////////////////////////////////////////////
 563 
 564 #undef __
--- EOF ---