1 /*
   2  * Copyright (c) 1999, 2018, 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 "oops/objArrayKlass.hpp"
  33 #include "runtime/sharedRuntime.hpp"
  34 #include "utilities/align.hpp"
  35 #include "utilities/macros.hpp"
  36 #include "vmreg_x86.inline.hpp"
  37 
  38 
  39 #define __ ce->masm()->
  40 
  41 float ConversionStub::float_zero = 0.0;
  42 double ConversionStub::double_zero = 0.0;
  43 
  44 void ConversionStub::emit_code(LIR_Assembler* ce) {
  45   __ bind(_entry);
  46   assert(bytecode() == Bytecodes::_f2i || bytecode() == Bytecodes::_d2i, "other conversions do not require stub");
  47 
  48 
  49   if (input()->is_single_xmm()) {
  50     __ comiss(input()->as_xmm_float_reg(),
  51               ExternalAddress((address)&float_zero));
  52   } else if (input()->is_double_xmm()) {
  53     __ comisd(input()->as_xmm_double_reg(),
  54               ExternalAddress((address)&double_zero));
  55   } else {
  56     LP64_ONLY(ShouldNotReachHere());
  57     __ push(rax);
  58     __ ftst();
  59     __ fnstsw_ax();
  60     __ sahf();
  61     __ pop(rax);
  62   }
  63 
  64   Label NaN, do_return;
  65   __ jccb(Assembler::parity, NaN);
  66   __ jccb(Assembler::below, do_return);
  67 
  68   // input is > 0 -> return maxInt
  69   // result register already contains 0x80000000, so subtracting 1 gives 0x7fffffff
  70   __ decrement(result()->as_register());
  71   __ jmpb(do_return);
  72 
  73   // input is NaN -> return 0
  74   __ bind(NaN);
  75   __ xorptr(result()->as_register(), result()->as_register());
  76 
  77   __ bind(do_return);
  78   __ jmp(_continuation);
  79 }
  80 
  81 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
  82   __ bind(_entry);
  83   Metadata *m = _method->as_constant_ptr()->as_metadata();
  84   ce->store_parameter(m, 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, LIR_Opr array)
  93   : _index(index), _array(array), _throw_index_out_of_bounds_exception(false) {
  94   assert(info != NULL, "must have info");
  95   _info = new CodeEmitInfo(info);
  96 }
  97 
  98 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index)
  99   : _index(index), _array(NULL), _throw_index_out_of_bounds_exception(true) {
 100   assert(info != NULL, "must have info");
 101   _info = new CodeEmitInfo(info);
 102 }
 103 
 104 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
 105   __ bind(_entry);
 106   if (_info->deoptimize_on_exception()) {
 107     address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
 108     __ call(RuntimeAddress(a));
 109     ce->add_call_info_here(_info);
 110     ce->verify_oop_map(_info);
 111     debug_only(__ should_not_reach_here());
 112     return;
 113   }
 114 
 115   // pass the array index on stack because all registers must be preserved
 116   if (_index->is_cpu_register()) {
 117     ce->store_parameter(_index->as_register(), 0);
 118   } else {
 119     ce->store_parameter(_index->as_jint(), 0);
 120   }
 121   Runtime1::StubID stub_id;
 122   if (_throw_index_out_of_bounds_exception) {
 123     stub_id = Runtime1::throw_index_exception_id;
 124   } else {
 125     stub_id = Runtime1::throw_range_check_failed_id;
 126     ce->store_parameter(_array->as_pointer_register(), 1);
 127   }
 128   __ call(RuntimeAddress(Runtime1::entry_for(stub_id)));
 129   ce->add_call_info_here(_info);
 130   ce->verify_oop_map(_info);
 131   debug_only(__ should_not_reach_here());
 132 }
 133 
 134 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
 135   _info = new CodeEmitInfo(info);
 136 }
 137 
 138 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
 139   __ bind(_entry);
 140   address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
 141   __ call(RuntimeAddress(a));
 142   ce->add_call_info_here(_info);
 143   ce->verify_oop_map(_info);
 144   debug_only(__ should_not_reach_here());
 145 }
 146 
 147 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
 148   if (_offset != -1) {
 149     ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
 150   }
 151   __ bind(_entry);
 152   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_div0_exception_id)));
 153   ce->add_call_info_here(_info);
 154   debug_only(__ should_not_reach_here());
 155 }
 156 
 157 
 158 // Implementation of LoadFlattenedArrayStub
 159 
 160 LoadFlattenedArrayStub::LoadFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) {
 161   _array = array;
 162   _index = index;
 163   _result = result;
 164   _info = new CodeEmitInfo(info);
 165 }
 166 
 167 
 168 void LoadFlattenedArrayStub::emit_code(LIR_Assembler* ce) {
 169   assert(__ rsp_offset() == 0, "frame size should be fixed");
 170   __ bind(_entry);
 171   ce->store_parameter(_array->as_register(), 1);
 172   ce->store_parameter(_index->as_register(), 0);
 173   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::load_flattened_array_id)));
 174   ce->add_call_info_here(_info);
 175   ce->verify_oop_map(_info);
 176   if (_result->as_register() != rax) {
 177     __ movptr(_result->as_register(), rax);
 178   }
 179   __ jmp(_continuation);
 180 }
 181 
 182 
 183 // Implementation of StoreFlattenedArrayStub
 184 
 185 StoreFlattenedArrayStub::StoreFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr value, CodeEmitInfo* info) {
 186   _array = array;
 187   _index = index;
 188   _value = value;
 189   _info = new CodeEmitInfo(info);
 190 }
 191 
 192 
 193 void StoreFlattenedArrayStub::emit_code(LIR_Assembler* ce) {
 194   assert(__ rsp_offset() == 0, "frame size should be fixed");
 195   __ bind(_entry);
 196   ce->store_parameter(_array->as_register(), 2);
 197   ce->store_parameter(_index->as_register(), 1);
 198   ce->store_parameter(_value->as_register(), 0);
 199   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::store_flattened_array_id)));
 200   ce->add_call_info_here(_info);
 201   ce->verify_oop_map(_info);
 202   __ jmp(_continuation);
 203 }
 204 
 205 
 206 // Implementation of NewInstanceStub
 207 
 208 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
 209   _result = result;
 210   _klass = klass;
 211   _klass_reg = klass_reg;
 212   _info = new CodeEmitInfo(info);
 213   assert(stub_id == Runtime1::new_instance_id                 ||
 214          stub_id == Runtime1::fast_new_instance_id            ||
 215          stub_id == Runtime1::fast_new_instance_init_check_id,
 216          "need new_instance id");
 217   _stub_id   = stub_id;
 218 }
 219 
 220 
 221 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
 222   assert(__ rsp_offset() == 0, "frame size should be fixed");
 223   __ bind(_entry);
 224   __ movptr(rdx, _klass_reg->as_register());
 225   __ call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
 226   ce->add_call_info_here(_info);
 227   ce->verify_oop_map(_info);
 228   assert(_result->as_register() == rax, "result must in rax,");
 229   __ jmp(_continuation);
 230 }
 231 
 232 
 233 // Implementation of NewTypeArrayStub
 234 
 235 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
 236   _klass_reg = klass_reg;
 237   _length = length;
 238   _result = result;
 239   _info = new CodeEmitInfo(info);
 240 }
 241 
 242 
 243 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
 244   assert(__ rsp_offset() == 0, "frame size should be fixed");
 245   __ bind(_entry);
 246   assert(_length->as_register() == rbx, "length must in rbx,");
 247   assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
 248   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
 249   ce->add_call_info_here(_info);
 250   ce->verify_oop_map(_info);
 251   assert(_result->as_register() == rax, "result must in rax,");
 252   __ jmp(_continuation);
 253 }
 254 
 255 
 256 // Implementation of NewObjectArrayStub
 257 
 258 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result,
 259                                        CodeEmitInfo* info, bool is_value_type) {
 260   _klass_reg = klass_reg;
 261   _result = result;
 262   _length = length;
 263   _info = new CodeEmitInfo(info);
 264   _is_value_type = is_value_type;
 265 }
 266 
 267 
 268 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
 269   assert(__ rsp_offset() == 0, "frame size should be fixed");
 270   __ bind(_entry);
 271   assert(_length->as_register() == rbx, "length must in rbx,");
 272   assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
 273   if (_is_value_type) {
 274     __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_value_array_id)));
 275   } else {
 276     __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
 277   }
 278   ce->add_call_info_here(_info);
 279   ce->verify_oop_map(_info);
 280   assert(_result->as_register() == rax, "result must in rax,");
 281   __ jmp(_continuation);
 282 }
 283 
 284 
 285 // Implementation of MonitorAccessStubs
 286 
 287 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info, CodeStub* throw_imse_stub, LIR_Opr scratch_reg)
 288 : MonitorAccessStub(obj_reg, lock_reg)
 289 {
 290   _info = new CodeEmitInfo(info);
 291   _throw_imse_stub = throw_imse_stub;
 292   _scratch_reg = scratch_reg;
 293   if (_throw_imse_stub != NULL) {
 294     assert(_scratch_reg != LIR_OprFact::illegalOpr, "must be");
 295   }
 296 }
 297 
 298 
 299 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
 300   assert(__ rsp_offset() == 0, "frame size should be fixed");
 301   __ bind(_entry);
 302   if (_throw_imse_stub != NULL) {
 303     // When we come here, _obj_reg has already been checked to be non-null.
 304     Register mark = _scratch_reg->as_register();
 305     __ movptr(mark, Address(_obj_reg->as_register(), oopDesc::mark_offset_in_bytes()));
 306     __ testl(mark, markOopDesc::always_locked_pattern);
 307     __ jcc(Assembler::notZero, *_throw_imse_stub->entry());
 308   }
 309   ce->store_parameter(_obj_reg->as_register(),  1);
 310   ce->store_parameter(_lock_reg->as_register(), 0);
 311   Runtime1::StubID enter_id;
 312   if (ce->compilation()->has_fpu_code()) {
 313     enter_id = Runtime1::monitorenter_id;
 314   } else {
 315     enter_id = Runtime1::monitorenter_nofpu_id;
 316   }
 317   __ call(RuntimeAddress(Runtime1::entry_for(enter_id)));
 318   ce->add_call_info_here(_info);
 319   ce->verify_oop_map(_info);
 320   __ jmp(_continuation);
 321 }
 322 
 323 
 324 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
 325   __ bind(_entry);
 326   if (_compute_lock) {
 327     // lock_reg was destroyed by fast unlocking attempt => recompute it
 328     ce->monitor_address(_monitor_ix, _lock_reg);
 329   }
 330   ce->store_parameter(_lock_reg->as_register(), 0);
 331   // note: non-blocking leaf routine => no call info needed
 332   Runtime1::StubID exit_id;
 333   if (ce->compilation()->has_fpu_code()) {
 334     exit_id = Runtime1::monitorexit_id;
 335   } else {
 336     exit_id = Runtime1::monitorexit_nofpu_id;
 337   }
 338   __ call(RuntimeAddress(Runtime1::entry_for(exit_id)));
 339   __ jmp(_continuation);
 340 }
 341 
 342 
 343 // Implementation of patching:
 344 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
 345 // - Replace original code with a call to the stub
 346 // At Runtime:
 347 // - call to stub, jump to runtime
 348 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
 349 // - in runtime: after initializing class, restore original code, reexecute instruction
 350 
 351 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
 352 
 353 void PatchingStub::align_patch_site(MacroAssembler* masm) {
 354   // We're patching a 5-7 byte instruction on intel and we need to
 355   // make sure that we don't see a piece of the instruction.  It
 356   // appears mostly impossible on Intel to simply invalidate other
 357   // processors caches and since they may do aggressive prefetch it's
 358   // very hard to make a guess about what code might be in the icache.
 359   // Force the instruction to be double word aligned so that it
 360   // doesn't span a cache line.
 361   masm->align(align_up((int)NativeGeneralJump::instruction_size, wordSize));
 362 }
 363 
 364 void PatchingStub::emit_code(LIR_Assembler* ce) {
 365   assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, "not enough room for call");
 366 
 367   Label call_patch;
 368 
 369   // static field accesses have special semantics while the class
 370   // initializer is being run so we emit a test which can be used to
 371   // check that this code is being executed by the initializing
 372   // thread.
 373   address being_initialized_entry = __ pc();
 374   if (CommentedAssembly) {
 375     __ block_comment(" patch template");
 376   }
 377   if (_id == load_klass_id) {
 378     // produce a copy of the load klass instruction for use by the being initialized case
 379 #ifdef ASSERT
 380     address start = __ pc();
 381 #endif
 382     Metadata* o = NULL;
 383     __ mov_metadata(_obj, o);
 384 #ifdef ASSERT
 385     for (int i = 0; i < _bytes_to_copy; i++) {
 386       address ptr = (address)(_pc_start + i);
 387       int a_byte = (*ptr) & 0xFF;
 388       assert(a_byte == *start++, "should be the same code");
 389     }
 390 #endif
 391   } else if (_id == load_mirror_id) {
 392     // produce a copy of the load mirror instruction for use by the being
 393     // initialized case
 394 #ifdef ASSERT
 395     address start = __ pc();
 396 #endif
 397     jobject o = NULL;
 398     __ movoop(_obj, o);
 399 #ifdef ASSERT
 400     for (int i = 0; i < _bytes_to_copy; i++) {
 401       address ptr = (address)(_pc_start + i);
 402       int a_byte = (*ptr) & 0xFF;
 403       assert(a_byte == *start++, "should be the same code");
 404     }
 405 #endif
 406   } else {
 407     // make a copy the code which is going to be patched.
 408     for (int i = 0; i < _bytes_to_copy; i++) {
 409       address ptr = (address)(_pc_start + i);
 410       int a_byte = (*ptr) & 0xFF;
 411       __ emit_int8(a_byte);
 412       *ptr = 0x90; // make the site look like a nop
 413     }
 414   }
 415 
 416   address end_of_patch = __ pc();
 417   int bytes_to_skip = 0;
 418   if (_id == load_mirror_id) {
 419     int offset = __ offset();
 420     if (CommentedAssembly) {
 421       __ block_comment(" being_initialized check");
 422     }
 423     assert(_obj != noreg, "must be a valid register");
 424     Register tmp = rax;
 425     Register tmp2 = rbx;
 426     __ push(tmp);
 427     __ push(tmp2);
 428     // Load without verification to keep code size small. We need it because
 429     // begin_initialized_entry_offset has to fit in a byte. Also, we know it's not null.
 430     __ movptr(tmp2, Address(_obj, java_lang_Class::klass_offset_in_bytes()));
 431     __ get_thread(tmp);
 432     __ cmpptr(tmp, Address(tmp2, InstanceKlass::init_thread_offset()));
 433     __ pop(tmp2);
 434     __ pop(tmp);
 435     __ jcc(Assembler::notEqual, call_patch);
 436 
 437     // access_field patches may execute the patched code before it's
 438     // copied back into place so we need to jump back into the main
 439     // code of the nmethod to continue execution.
 440     __ jmp(_patch_site_continuation);
 441 
 442     // make sure this extra code gets skipped
 443     bytes_to_skip += __ offset() - offset;
 444   }
 445   if (CommentedAssembly) {
 446     __ block_comment("patch data encoded as movl");
 447   }
 448   // Now emit the patch record telling the runtime how to find the
 449   // pieces of the patch.  We only need 3 bytes but for readability of
 450   // the disassembly we make the data look like a movl reg, imm32,
 451   // which requires 5 bytes
 452   int sizeof_patch_record = 5;
 453   bytes_to_skip += sizeof_patch_record;
 454 
 455   // emit the offsets needed to find the code to patch
 456   int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record;
 457 
 458   __ emit_int8((unsigned char)0xB8);
 459   __ emit_int8(0);
 460   __ emit_int8(being_initialized_entry_offset);
 461   __ emit_int8(bytes_to_skip);
 462   __ emit_int8(_bytes_to_copy);
 463   address patch_info_pc = __ pc();
 464   assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
 465 
 466   address entry = __ pc();
 467   NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
 468   address target = NULL;
 469   relocInfo::relocType reloc_type = relocInfo::none;
 470   switch (_id) {
 471     case access_field_id:  target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
 472     case load_klass_id:    target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break;
 473     case load_mirror_id:   target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break;
 474     case load_appendix_id:      target = Runtime1::entry_for(Runtime1::load_appendix_patching_id); reloc_type = relocInfo::oop_type; break;
 475     default: ShouldNotReachHere();
 476   }
 477   __ bind(call_patch);
 478 
 479   if (CommentedAssembly) {
 480     __ block_comment("patch entry point");
 481   }
 482   __ call(RuntimeAddress(target));
 483   assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
 484   ce->add_call_info_here(_info);
 485   int jmp_off = __ offset();
 486   __ jmp(_patch_site_entry);
 487   // Add enough nops so deoptimization can overwrite the jmp above with a call
 488   // and not destroy the world. We cannot use fat nops here, since the concurrent
 489   // code rewrite may transiently create the illegal instruction sequence.
 490   for (int j = __ offset() ; j < jmp_off + 5 ; j++ ) {
 491     __ nop();
 492   }
 493   if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) {
 494     CodeSection* cs = __ code_section();
 495     RelocIterator iter(cs, (address)_pc_start, (address)(_pc_start + 1));
 496     relocInfo::change_reloc_info_for_address(&iter, (address) _pc_start, reloc_type, relocInfo::none);
 497   }
 498 }
 499 
 500 
 501 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
 502   __ bind(_entry);
 503   ce->store_parameter(_trap_request, 0);
 504   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
 505   ce->add_call_info_here(_info);
 506   DEBUG_ONLY(__ should_not_reach_here());
 507 }
 508 
 509 
 510 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
 511   address a;
 512   if (_info->deoptimize_on_exception()) {
 513     // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
 514     a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
 515   } else {
 516     a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
 517   }
 518 
 519   ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
 520   __ bind(_entry);
 521   __ call(RuntimeAddress(a));
 522   ce->add_call_info_here(_info);
 523   ce->verify_oop_map(_info);
 524   debug_only(__ should_not_reach_here());
 525 }
 526 
 527 
 528 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
 529   assert(__ rsp_offset() == 0, "frame size should be fixed");
 530 
 531   __ bind(_entry);
 532   // pass the object on stack because all registers must be preserved
 533   if (_obj->is_cpu_register()) {
 534     ce->store_parameter(_obj->as_register(), 0);
 535   }
 536   __ call(RuntimeAddress(Runtime1::entry_for(_stub)));
 537   ce->add_call_info_here(_info);
 538   debug_only(__ should_not_reach_here());
 539 }
 540 
 541 
 542 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
 543   //---------------slow case: call to native-----------------
 544   __ bind(_entry);
 545   // Figure out where the args should go
 546   // This should really convert the IntrinsicID to the Method* and signature
 547   // but I don't know how to do that.
 548   //
 549   VMRegPair args[5];
 550   BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
 551   SharedRuntime::java_calling_convention(signature, args, 5, true);
 552 
 553   // push parameters
 554   // (src, src_pos, dest, destPos, length)
 555   Register r[5];
 556   r[0] = src()->as_register();
 557   r[1] = src_pos()->as_register();
 558   r[2] = dst()->as_register();
 559   r[3] = dst_pos()->as_register();
 560   r[4] = length()->as_register();
 561 
 562   // next registers will get stored on the stack
 563   for (int i = 0; i < 5 ; i++ ) {
 564     VMReg r_1 = args[i].first();
 565     if (r_1->is_stack()) {
 566       int st_off = r_1->reg2stack() * wordSize;
 567       __ movptr (Address(rsp, st_off), r[i]);
 568     } else {
 569       assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
 570     }
 571   }
 572 
 573   ce->align_call(lir_static_call);
 574 
 575   ce->emit_static_call_stub();
 576   if (ce->compilation()->bailed_out()) {
 577     return; // CodeCache is full
 578   }
 579   AddressLiteral resolve(SharedRuntime::get_resolve_static_call_stub(),
 580                          relocInfo::static_call_type);
 581   __ call(resolve);
 582   ce->add_call_info_here(info());
 583 
 584 #ifndef PRODUCT
 585   __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
 586 #endif
 587 
 588   __ jmp(_continuation);
 589 }
 590 
 591 #undef __
--- EOF ---