src/hotspot/cpu/x86/c1_CodeStubs_x86.cpp
changeset 47216 71c04702a3d5
parent 46625 edefffab74e2
child 49347 edb65305d3ac
equal deleted inserted replaced
47215:4ebc2e2fb97c 47216:71c04702a3d5
       
     1 /*
       
     2  * Copyright (c) 1999, 2015, 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/align.hpp"
       
    34 #include "utilities/macros.hpp"
       
    35 #include "vmreg_x86.inline.hpp"
       
    36 #if INCLUDE_ALL_GCS
       
    37 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
       
    38 #endif // INCLUDE_ALL_GCS
       
    39 
       
    40 
       
    41 #define __ ce->masm()->
       
    42 
       
    43 float ConversionStub::float_zero = 0.0;
       
    44 double ConversionStub::double_zero = 0.0;
       
    45 
       
    46 void ConversionStub::emit_code(LIR_Assembler* ce) {
       
    47   __ bind(_entry);
       
    48   assert(bytecode() == Bytecodes::_f2i || bytecode() == Bytecodes::_d2i, "other conversions do not require stub");
       
    49 
       
    50 
       
    51   if (input()->is_single_xmm()) {
       
    52     __ comiss(input()->as_xmm_float_reg(),
       
    53               ExternalAddress((address)&float_zero));
       
    54   } else if (input()->is_double_xmm()) {
       
    55     __ comisd(input()->as_xmm_double_reg(),
       
    56               ExternalAddress((address)&double_zero));
       
    57   } else {
       
    58     LP64_ONLY(ShouldNotReachHere());
       
    59     __ push(rax);
       
    60     __ ftst();
       
    61     __ fnstsw_ax();
       
    62     __ sahf();
       
    63     __ pop(rax);
       
    64   }
       
    65 
       
    66   Label NaN, do_return;
       
    67   __ jccb(Assembler::parity, NaN);
       
    68   __ jccb(Assembler::below, do_return);
       
    69 
       
    70   // input is > 0 -> return maxInt
       
    71   // result register already contains 0x80000000, so subtracting 1 gives 0x7fffffff
       
    72   __ decrement(result()->as_register());
       
    73   __ jmpb(do_return);
       
    74 
       
    75   // input is NaN -> return 0
       
    76   __ bind(NaN);
       
    77   __ xorptr(result()->as_register(), result()->as_register());
       
    78 
       
    79   __ bind(do_return);
       
    80   __ jmp(_continuation);
       
    81 }
       
    82 
       
    83 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
       
    84   __ bind(_entry);
       
    85   Metadata *m = _method->as_constant_ptr()->as_metadata();
       
    86   ce->store_parameter(m, 1);
       
    87   ce->store_parameter(_bci, 0);
       
    88   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));
       
    89   ce->add_call_info_here(_info);
       
    90   ce->verify_oop_map(_info);
       
    91   __ jmp(_continuation);
       
    92 }
       
    93 
       
    94 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
       
    95                                bool throw_index_out_of_bounds_exception)
       
    96   : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
       
    97   , _index(index)
       
    98 {
       
    99   assert(info != NULL, "must have info");
       
   100   _info = new CodeEmitInfo(info);
       
   101 }
       
   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   }
       
   127   __ call(RuntimeAddress(Runtime1::entry_for(stub_id)));
       
   128   ce->add_call_info_here(_info);
       
   129   ce->verify_oop_map(_info);
       
   130   debug_only(__ should_not_reach_here());
       
   131 }
       
   132 
       
   133 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
       
   134   _info = new CodeEmitInfo(info);
       
   135 }
       
   136 
       
   137 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
       
   138   __ bind(_entry);
       
   139   address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
       
   140   __ call(RuntimeAddress(a));
       
   141   ce->add_call_info_here(_info);
       
   142   ce->verify_oop_map(_info);
       
   143   debug_only(__ should_not_reach_here());
       
   144 }
       
   145 
       
   146 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
       
   147   if (_offset != -1) {
       
   148     ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
       
   149   }
       
   150   __ bind(_entry);
       
   151   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_div0_exception_id)));
       
   152   ce->add_call_info_here(_info);
       
   153   debug_only(__ should_not_reach_here());
       
   154 }
       
   155 
       
   156 
       
   157 // Implementation of NewInstanceStub
       
   158 
       
   159 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
       
   160   _result = result;
       
   161   _klass = klass;
       
   162   _klass_reg = klass_reg;
       
   163   _info = new CodeEmitInfo(info);
       
   164   assert(stub_id == Runtime1::new_instance_id                 ||
       
   165          stub_id == Runtime1::fast_new_instance_id            ||
       
   166          stub_id == Runtime1::fast_new_instance_init_check_id,
       
   167          "need new_instance id");
       
   168   _stub_id   = stub_id;
       
   169 }
       
   170 
       
   171 
       
   172 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
       
   173   assert(__ rsp_offset() == 0, "frame size should be fixed");
       
   174   __ bind(_entry);
       
   175   __ movptr(rdx, _klass_reg->as_register());
       
   176   __ call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
       
   177   ce->add_call_info_here(_info);
       
   178   ce->verify_oop_map(_info);
       
   179   assert(_result->as_register() == rax, "result must in rax,");
       
   180   __ jmp(_continuation);
       
   181 }
       
   182 
       
   183 
       
   184 // Implementation of NewTypeArrayStub
       
   185 
       
   186 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
       
   187   _klass_reg = klass_reg;
       
   188   _length = length;
       
   189   _result = result;
       
   190   _info = new CodeEmitInfo(info);
       
   191 }
       
   192 
       
   193 
       
   194 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
       
   195   assert(__ rsp_offset() == 0, "frame size should be fixed");
       
   196   __ bind(_entry);
       
   197   assert(_length->as_register() == rbx, "length must in rbx,");
       
   198   assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
       
   199   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
       
   200   ce->add_call_info_here(_info);
       
   201   ce->verify_oop_map(_info);
       
   202   assert(_result->as_register() == rax, "result must in rax,");
       
   203   __ jmp(_continuation);
       
   204 }
       
   205 
       
   206 
       
   207 // Implementation of NewObjectArrayStub
       
   208 
       
   209 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
       
   210   _klass_reg = klass_reg;
       
   211   _result = result;
       
   212   _length = length;
       
   213   _info = new CodeEmitInfo(info);
       
   214 }
       
   215 
       
   216 
       
   217 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
       
   218   assert(__ rsp_offset() == 0, "frame size should be fixed");
       
   219   __ bind(_entry);
       
   220   assert(_length->as_register() == rbx, "length must in rbx,");
       
   221   assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
       
   222   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
       
   223   ce->add_call_info_here(_info);
       
   224   ce->verify_oop_map(_info);
       
   225   assert(_result->as_register() == rax, "result must in rax,");
       
   226   __ jmp(_continuation);
       
   227 }
       
   228 
       
   229 
       
   230 // Implementation of MonitorAccessStubs
       
   231 
       
   232 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
       
   233 : MonitorAccessStub(obj_reg, lock_reg)
       
   234 {
       
   235   _info = new CodeEmitInfo(info);
       
   236 }
       
   237 
       
   238 
       
   239 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
       
   240   assert(__ rsp_offset() == 0, "frame size should be fixed");
       
   241   __ bind(_entry);
       
   242   ce->store_parameter(_obj_reg->as_register(),  1);
       
   243   ce->store_parameter(_lock_reg->as_register(), 0);
       
   244   Runtime1::StubID enter_id;
       
   245   if (ce->compilation()->has_fpu_code()) {
       
   246     enter_id = Runtime1::monitorenter_id;
       
   247   } else {
       
   248     enter_id = Runtime1::monitorenter_nofpu_id;
       
   249   }
       
   250   __ call(RuntimeAddress(Runtime1::entry_for(enter_id)));
       
   251   ce->add_call_info_here(_info);
       
   252   ce->verify_oop_map(_info);
       
   253   __ jmp(_continuation);
       
   254 }
       
   255 
       
   256 
       
   257 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
       
   258   __ bind(_entry);
       
   259   if (_compute_lock) {
       
   260     // lock_reg was destroyed by fast unlocking attempt => recompute it
       
   261     ce->monitor_address(_monitor_ix, _lock_reg);
       
   262   }
       
   263   ce->store_parameter(_lock_reg->as_register(), 0);
       
   264   // note: non-blocking leaf routine => no call info needed
       
   265   Runtime1::StubID exit_id;
       
   266   if (ce->compilation()->has_fpu_code()) {
       
   267     exit_id = Runtime1::monitorexit_id;
       
   268   } else {
       
   269     exit_id = Runtime1::monitorexit_nofpu_id;
       
   270   }
       
   271   __ call(RuntimeAddress(Runtime1::entry_for(exit_id)));
       
   272   __ jmp(_continuation);
       
   273 }
       
   274 
       
   275 
       
   276 // Implementation of patching:
       
   277 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
       
   278 // - Replace original code with a call to the stub
       
   279 // At Runtime:
       
   280 // - call to stub, jump to runtime
       
   281 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
       
   282 // - in runtime: after initializing class, restore original code, reexecute instruction
       
   283 
       
   284 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
       
   285 
       
   286 void PatchingStub::align_patch_site(MacroAssembler* masm) {
       
   287   // We're patching a 5-7 byte instruction on intel and we need to
       
   288   // make sure that we don't see a piece of the instruction.  It
       
   289   // appears mostly impossible on Intel to simply invalidate other
       
   290   // processors caches and since they may do aggressive prefetch it's
       
   291   // very hard to make a guess about what code might be in the icache.
       
   292   // Force the instruction to be double word aligned so that it
       
   293   // doesn't span a cache line.
       
   294   masm->align(align_up((int)NativeGeneralJump::instruction_size, wordSize));
       
   295 }
       
   296 
       
   297 void PatchingStub::emit_code(LIR_Assembler* ce) {
       
   298   assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, "not enough room for call");
       
   299 
       
   300   Label call_patch;
       
   301 
       
   302   // static field accesses have special semantics while the class
       
   303   // initializer is being run so we emit a test which can be used to
       
   304   // check that this code is being executed by the initializing
       
   305   // thread.
       
   306   address being_initialized_entry = __ pc();
       
   307   if (CommentedAssembly) {
       
   308     __ block_comment(" patch template");
       
   309   }
       
   310   if (_id == load_klass_id) {
       
   311     // produce a copy of the load klass instruction for use by the being initialized case
       
   312 #ifdef ASSERT
       
   313     address start = __ pc();
       
   314 #endif
       
   315     Metadata* o = NULL;
       
   316     __ mov_metadata(_obj, o);
       
   317 #ifdef ASSERT
       
   318     for (int i = 0; i < _bytes_to_copy; i++) {
       
   319       address ptr = (address)(_pc_start + i);
       
   320       int a_byte = (*ptr) & 0xFF;
       
   321       assert(a_byte == *start++, "should be the same code");
       
   322     }
       
   323 #endif
       
   324   } else if (_id == load_mirror_id) {
       
   325     // produce a copy of the load mirror instruction for use by the being
       
   326     // initialized case
       
   327 #ifdef ASSERT
       
   328     address start = __ pc();
       
   329 #endif
       
   330     jobject o = NULL;
       
   331     __ movoop(_obj, o);
       
   332 #ifdef ASSERT
       
   333     for (int i = 0; i < _bytes_to_copy; i++) {
       
   334       address ptr = (address)(_pc_start + i);
       
   335       int a_byte = (*ptr) & 0xFF;
       
   336       assert(a_byte == *start++, "should be the same code");
       
   337     }
       
   338 #endif
       
   339   } else {
       
   340     // make a copy the code which is going to be patched.
       
   341     for (int i = 0; i < _bytes_to_copy; i++) {
       
   342       address ptr = (address)(_pc_start + i);
       
   343       int a_byte = (*ptr) & 0xFF;
       
   344       __ emit_int8(a_byte);
       
   345       *ptr = 0x90; // make the site look like a nop
       
   346     }
       
   347   }
       
   348 
       
   349   address end_of_patch = __ pc();
       
   350   int bytes_to_skip = 0;
       
   351   if (_id == load_mirror_id) {
       
   352     int offset = __ offset();
       
   353     if (CommentedAssembly) {
       
   354       __ block_comment(" being_initialized check");
       
   355     }
       
   356     assert(_obj != noreg, "must be a valid register");
       
   357     Register tmp = rax;
       
   358     Register tmp2 = rbx;
       
   359     __ push(tmp);
       
   360     __ push(tmp2);
       
   361     // Load without verification to keep code size small. We need it because
       
   362     // begin_initialized_entry_offset has to fit in a byte. Also, we know it's not null.
       
   363     __ movptr(tmp2, Address(_obj, java_lang_Class::klass_offset_in_bytes()));
       
   364     __ get_thread(tmp);
       
   365     __ cmpptr(tmp, Address(tmp2, InstanceKlass::init_thread_offset()));
       
   366     __ pop(tmp2);
       
   367     __ pop(tmp);
       
   368     __ jcc(Assembler::notEqual, call_patch);
       
   369 
       
   370     // access_field patches may execute the patched code before it's
       
   371     // copied back into place so we need to jump back into the main
       
   372     // code of the nmethod to continue execution.
       
   373     __ jmp(_patch_site_continuation);
       
   374 
       
   375     // make sure this extra code gets skipped
       
   376     bytes_to_skip += __ offset() - offset;
       
   377   }
       
   378   if (CommentedAssembly) {
       
   379     __ block_comment("patch data encoded as movl");
       
   380   }
       
   381   // Now emit the patch record telling the runtime how to find the
       
   382   // pieces of the patch.  We only need 3 bytes but for readability of
       
   383   // the disassembly we make the data look like a movl reg, imm32,
       
   384   // which requires 5 bytes
       
   385   int sizeof_patch_record = 5;
       
   386   bytes_to_skip += sizeof_patch_record;
       
   387 
       
   388   // emit the offsets needed to find the code to patch
       
   389   int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record;
       
   390 
       
   391   __ emit_int8((unsigned char)0xB8);
       
   392   __ emit_int8(0);
       
   393   __ emit_int8(being_initialized_entry_offset);
       
   394   __ emit_int8(bytes_to_skip);
       
   395   __ emit_int8(_bytes_to_copy);
       
   396   address patch_info_pc = __ pc();
       
   397   assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
       
   398 
       
   399   address entry = __ pc();
       
   400   NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
       
   401   address target = NULL;
       
   402   relocInfo::relocType reloc_type = relocInfo::none;
       
   403   switch (_id) {
       
   404     case access_field_id:  target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
       
   405     case load_klass_id:    target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break;
       
   406     case load_mirror_id:   target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break;
       
   407     case load_appendix_id:      target = Runtime1::entry_for(Runtime1::load_appendix_patching_id); reloc_type = relocInfo::oop_type; break;
       
   408     default: ShouldNotReachHere();
       
   409   }
       
   410   __ bind(call_patch);
       
   411 
       
   412   if (CommentedAssembly) {
       
   413     __ block_comment("patch entry point");
       
   414   }
       
   415   __ call(RuntimeAddress(target));
       
   416   assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
       
   417   ce->add_call_info_here(_info);
       
   418   int jmp_off = __ offset();
       
   419   __ jmp(_patch_site_entry);
       
   420   // Add enough nops so deoptimization can overwrite the jmp above with a call
       
   421   // and not destroy the world. We cannot use fat nops here, since the concurrent
       
   422   // code rewrite may transiently create the illegal instruction sequence.
       
   423   for (int j = __ offset() ; j < jmp_off + 5 ; j++ ) {
       
   424     __ nop();
       
   425   }
       
   426   if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) {
       
   427     CodeSection* cs = __ code_section();
       
   428     RelocIterator iter(cs, (address)_pc_start, (address)(_pc_start + 1));
       
   429     relocInfo::change_reloc_info_for_address(&iter, (address) _pc_start, reloc_type, relocInfo::none);
       
   430   }
       
   431 }
       
   432 
       
   433 
       
   434 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
       
   435   __ bind(_entry);
       
   436   ce->store_parameter(_trap_request, 0);
       
   437   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
       
   438   ce->add_call_info_here(_info);
       
   439   DEBUG_ONLY(__ should_not_reach_here());
       
   440 }
       
   441 
       
   442 
       
   443 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
       
   444   address a;
       
   445   if (_info->deoptimize_on_exception()) {
       
   446     // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
       
   447     a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
       
   448   } else {
       
   449     a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
       
   450   }
       
   451 
       
   452   ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
       
   453   __ bind(_entry);
       
   454   __ call(RuntimeAddress(a));
       
   455   ce->add_call_info_here(_info);
       
   456   ce->verify_oop_map(_info);
       
   457   debug_only(__ should_not_reach_here());
       
   458 }
       
   459 
       
   460 
       
   461 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
       
   462   assert(__ rsp_offset() == 0, "frame size should be fixed");
       
   463 
       
   464   __ bind(_entry);
       
   465   // pass the object on stack because all registers must be preserved
       
   466   if (_obj->is_cpu_register()) {
       
   467     ce->store_parameter(_obj->as_register(), 0);
       
   468   }
       
   469   __ call(RuntimeAddress(Runtime1::entry_for(_stub)));
       
   470   ce->add_call_info_here(_info);
       
   471   debug_only(__ should_not_reach_here());
       
   472 }
       
   473 
       
   474 
       
   475 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
       
   476   //---------------slow case: call to native-----------------
       
   477   __ bind(_entry);
       
   478   // Figure out where the args should go
       
   479   // This should really convert the IntrinsicID to the Method* and signature
       
   480   // but I don't know how to do that.
       
   481   //
       
   482   VMRegPair args[5];
       
   483   BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
       
   484   SharedRuntime::java_calling_convention(signature, args, 5, true);
       
   485 
       
   486   // push parameters
       
   487   // (src, src_pos, dest, destPos, length)
       
   488   Register r[5];
       
   489   r[0] = src()->as_register();
       
   490   r[1] = src_pos()->as_register();
       
   491   r[2] = dst()->as_register();
       
   492   r[3] = dst_pos()->as_register();
       
   493   r[4] = length()->as_register();
       
   494 
       
   495   // next registers will get stored on the stack
       
   496   for (int i = 0; i < 5 ; i++ ) {
       
   497     VMReg r_1 = args[i].first();
       
   498     if (r_1->is_stack()) {
       
   499       int st_off = r_1->reg2stack() * wordSize;
       
   500       __ movptr (Address(rsp, st_off), r[i]);
       
   501     } else {
       
   502       assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
       
   503     }
       
   504   }
       
   505 
       
   506   ce->align_call(lir_static_call);
       
   507 
       
   508   ce->emit_static_call_stub();
       
   509   if (ce->compilation()->bailed_out()) {
       
   510     return; // CodeCache is full
       
   511   }
       
   512   AddressLiteral resolve(SharedRuntime::get_resolve_static_call_stub(),
       
   513                          relocInfo::static_call_type);
       
   514   __ call(resolve);
       
   515   ce->add_call_info_here(info());
       
   516 
       
   517 #ifndef PRODUCT
       
   518   __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
       
   519 #endif
       
   520 
       
   521   __ jmp(_continuation);
       
   522 }
       
   523 
       
   524 /////////////////////////////////////////////////////////////////////////////
       
   525 #if INCLUDE_ALL_GCS
       
   526 
       
   527 void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
       
   528   // At this point we know that marking is in progress.
       
   529   // If do_load() is true then we have to emit the
       
   530   // load of the previous value; otherwise it has already
       
   531   // been loaded into _pre_val.
       
   532 
       
   533   __ bind(_entry);
       
   534   assert(pre_val()->is_register(), "Precondition.");
       
   535 
       
   536   Register pre_val_reg = pre_val()->as_register();
       
   537 
       
   538   if (do_load()) {
       
   539     ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/);
       
   540   }
       
   541 
       
   542   __ cmpptr(pre_val_reg, (int32_t) NULL_WORD);
       
   543   __ jcc(Assembler::equal, _continuation);
       
   544   ce->store_parameter(pre_val()->as_register(), 0);
       
   545   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id)));
       
   546   __ jmp(_continuation);
       
   547 
       
   548 }
       
   549 
       
   550 void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
       
   551   __ bind(_entry);
       
   552   assert(addr()->is_register(), "Precondition.");
       
   553   assert(new_val()->is_register(), "Precondition.");
       
   554   Register new_val_reg = new_val()->as_register();
       
   555   __ cmpptr(new_val_reg, (int32_t) NULL_WORD);
       
   556   __ jcc(Assembler::equal, _continuation);
       
   557   ce->store_parameter(addr()->as_pointer_register(), 0);
       
   558   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_post_barrier_slow_id)));
       
   559   __ jmp(_continuation);
       
   560 }
       
   561 
       
   562 #endif // INCLUDE_ALL_GCS
       
   563 /////////////////////////////////////////////////////////////////////////////
       
   564 
       
   565 #undef __