duke@435: /*
coleenp@4037:  * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #include "precompiled.hpp"
stefank@2314: #include "c1/c1_CodeStubs.hpp"
stefank@2314: #include "c1/c1_FrameMap.hpp"
stefank@2314: #include "c1/c1_LIRAssembler.hpp"
stefank@2314: #include "c1/c1_MacroAssembler.hpp"
stefank@2314: #include "c1/c1_Runtime1.hpp"
stefank@2314: #include "nativeInst_x86.hpp"
stefank@2314: #include "runtime/sharedRuntime.hpp"
jprovino@4542: #include "utilities/macros.hpp"
stefank@2314: #include "vmreg_x86.inline.hpp"
jprovino@4542: #if INCLUDE_ALL_GCS
stefank@2314: #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
jprovino@4542: #endif // INCLUDE_ALL_GCS
duke@435: 
duke@435: 
duke@435: #define __ ce->masm()->
duke@435: 
duke@435: float ConversionStub::float_zero = 0.0;
duke@435: double ConversionStub::double_zero = 0.0;
duke@435: 
duke@435: void ConversionStub::emit_code(LIR_Assembler* ce) {
duke@435:   __ bind(_entry);
duke@435:   assert(bytecode() == Bytecodes::_f2i || bytecode() == Bytecodes::_d2i, "other conversions do not require stub");
duke@435: 
duke@435: 
duke@435:   if (input()->is_single_xmm()) {
duke@435:     __ comiss(input()->as_xmm_float_reg(),
duke@435:               ExternalAddress((address)&float_zero));
duke@435:   } else if (input()->is_double_xmm()) {
duke@435:     __ comisd(input()->as_xmm_double_reg(),
duke@435:               ExternalAddress((address)&double_zero));
duke@435:   } else {
never@739:     LP64_ONLY(ShouldNotReachHere());
never@739:     __ push(rax);
duke@435:     __ ftst();
duke@435:     __ fnstsw_ax();
duke@435:     __ sahf();
never@739:     __ pop(rax);
duke@435:   }
duke@435: 
duke@435:   Label NaN, do_return;
duke@435:   __ jccb(Assembler::parity, NaN);
duke@435:   __ jccb(Assembler::below, do_return);
duke@435: 
duke@435:   // input is > 0 -> return maxInt
duke@435:   // result register already contains 0x80000000, so subtracting 1 gives 0x7fffffff
duke@435:   __ decrement(result()->as_register());
duke@435:   __ jmpb(do_return);
duke@435: 
duke@435:   // input is NaN -> return 0
duke@435:   __ bind(NaN);
never@739:   __ xorptr(result()->as_register(), result()->as_register());
duke@435: 
duke@435:   __ bind(do_return);
duke@435:   __ jmp(_continuation);
duke@435: }
duke@435: 
duke@435: void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
duke@435:   __ bind(_entry);
iveresov@2138:   ce->store_parameter(_method->as_register(), 1);
duke@435:   ce->store_parameter(_bci, 0);
duke@435:   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));
duke@435:   ce->add_call_info_here(_info);
duke@435:   ce->verify_oop_map(_info);
duke@435:   __ jmp(_continuation);
duke@435: }
duke@435: 
duke@435: RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
duke@435:                                bool throw_index_out_of_bounds_exception)
duke@435:   : _throw_index_out_of_bounds_exception(throw_index_out_of_bounds_exception)
duke@435:   , _index(index)
duke@435: {
roland@2174:   assert(info != NULL, "must have info");
roland@2174:   _info = new CodeEmitInfo(info);
duke@435: }
duke@435: 
duke@435: 
duke@435: void RangeCheckStub::emit_code(LIR_Assembler* ce) {
duke@435:   __ bind(_entry);
duke@435:   // pass the array index on stack because all registers must be preserved
duke@435:   if (_index->is_cpu_register()) {
duke@435:     ce->store_parameter(_index->as_register(), 0);
duke@435:   } else {
duke@435:     ce->store_parameter(_index->as_jint(), 0);
duke@435:   }
duke@435:   Runtime1::StubID stub_id;
duke@435:   if (_throw_index_out_of_bounds_exception) {
duke@435:     stub_id = Runtime1::throw_index_exception_id;
duke@435:   } else {
duke@435:     stub_id = Runtime1::throw_range_check_failed_id;
duke@435:   }
duke@435:   __ call(RuntimeAddress(Runtime1::entry_for(stub_id)));
duke@435:   ce->add_call_info_here(_info);
duke@435:   debug_only(__ should_not_reach_here());
duke@435: }
duke@435: 
duke@435: 
duke@435: void DivByZeroStub::emit_code(LIR_Assembler* ce) {
duke@435:   if (_offset != -1) {
duke@435:     ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
duke@435:   }
duke@435:   __ bind(_entry);
duke@435:   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_div0_exception_id)));
duke@435:   ce->add_call_info_here(_info);
duke@435:   debug_only(__ should_not_reach_here());
duke@435: }
duke@435: 
duke@435: 
duke@435: // Implementation of NewInstanceStub
duke@435: 
duke@435: NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
duke@435:   _result = result;
duke@435:   _klass = klass;
duke@435:   _klass_reg = klass_reg;
duke@435:   _info = new CodeEmitInfo(info);
duke@435:   assert(stub_id == Runtime1::new_instance_id                 ||
duke@435:          stub_id == Runtime1::fast_new_instance_id            ||
duke@435:          stub_id == Runtime1::fast_new_instance_init_check_id,
duke@435:          "need new_instance id");
duke@435:   _stub_id   = stub_id;
duke@435: }
duke@435: 
duke@435: 
duke@435: void NewInstanceStub::emit_code(LIR_Assembler* ce) {
duke@435:   assert(__ rsp_offset() == 0, "frame size should be fixed");
duke@435:   __ bind(_entry);
never@739:   __ movptr(rdx, _klass_reg->as_register());
duke@435:   __ call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
duke@435:   ce->add_call_info_here(_info);
duke@435:   ce->verify_oop_map(_info);
duke@435:   assert(_result->as_register() == rax, "result must in rax,");
duke@435:   __ jmp(_continuation);
duke@435: }
duke@435: 
duke@435: 
duke@435: // Implementation of NewTypeArrayStub
duke@435: 
duke@435: NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
duke@435:   _klass_reg = klass_reg;
duke@435:   _length = length;
duke@435:   _result = result;
duke@435:   _info = new CodeEmitInfo(info);
duke@435: }
duke@435: 
duke@435: 
duke@435: void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
duke@435:   assert(__ rsp_offset() == 0, "frame size should be fixed");
duke@435:   __ bind(_entry);
duke@435:   assert(_length->as_register() == rbx, "length must in rbx,");
duke@435:   assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
duke@435:   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
duke@435:   ce->add_call_info_here(_info);
duke@435:   ce->verify_oop_map(_info);
duke@435:   assert(_result->as_register() == rax, "result must in rax,");
duke@435:   __ jmp(_continuation);
duke@435: }
duke@435: 
duke@435: 
duke@435: // Implementation of NewObjectArrayStub
duke@435: 
duke@435: NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
duke@435:   _klass_reg = klass_reg;
duke@435:   _result = result;
duke@435:   _length = length;
duke@435:   _info = new CodeEmitInfo(info);
duke@435: }
duke@435: 
duke@435: 
duke@435: void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
duke@435:   assert(__ rsp_offset() == 0, "frame size should be fixed");
duke@435:   __ bind(_entry);
duke@435:   assert(_length->as_register() == rbx, "length must in rbx,");
duke@435:   assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
duke@435:   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
duke@435:   ce->add_call_info_here(_info);
duke@435:   ce->verify_oop_map(_info);
duke@435:   assert(_result->as_register() == rax, "result must in rax,");
duke@435:   __ jmp(_continuation);
duke@435: }
duke@435: 
duke@435: 
duke@435: // Implementation of MonitorAccessStubs
duke@435: 
duke@435: MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info)
duke@435: : MonitorAccessStub(obj_reg, lock_reg)
duke@435: {
duke@435:   _info = new CodeEmitInfo(info);
duke@435: }
duke@435: 
duke@435: 
duke@435: void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
duke@435:   assert(__ rsp_offset() == 0, "frame size should be fixed");
duke@435:   __ bind(_entry);
duke@435:   ce->store_parameter(_obj_reg->as_register(),  1);
duke@435:   ce->store_parameter(_lock_reg->as_register(), 0);
duke@435:   Runtime1::StubID enter_id;
duke@435:   if (ce->compilation()->has_fpu_code()) {
duke@435:     enter_id = Runtime1::monitorenter_id;
duke@435:   } else {
duke@435:     enter_id = Runtime1::monitorenter_nofpu_id;
duke@435:   }
duke@435:   __ call(RuntimeAddress(Runtime1::entry_for(enter_id)));
duke@435:   ce->add_call_info_here(_info);
duke@435:   ce->verify_oop_map(_info);
duke@435:   __ jmp(_continuation);
duke@435: }
duke@435: 
duke@435: 
duke@435: void MonitorExitStub::emit_code(LIR_Assembler* ce) {
duke@435:   __ bind(_entry);
duke@435:   if (_compute_lock) {
duke@435:     // lock_reg was destroyed by fast unlocking attempt => recompute it
duke@435:     ce->monitor_address(_monitor_ix, _lock_reg);
duke@435:   }
duke@435:   ce->store_parameter(_lock_reg->as_register(), 0);
duke@435:   // note: non-blocking leaf routine => no call info needed
duke@435:   Runtime1::StubID exit_id;
duke@435:   if (ce->compilation()->has_fpu_code()) {
duke@435:     exit_id = Runtime1::monitorexit_id;
duke@435:   } else {
duke@435:     exit_id = Runtime1::monitorexit_nofpu_id;
duke@435:   }
duke@435:   __ call(RuntimeAddress(Runtime1::entry_for(exit_id)));
duke@435:   __ jmp(_continuation);
duke@435: }
duke@435: 
duke@435: 
duke@435: // Implementation of patching:
duke@435: // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
duke@435: // - Replace original code with a call to the stub
duke@435: // At Runtime:
duke@435: // - call to stub, jump to runtime
duke@435: // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
duke@435: // - in runtime: after initializing class, restore original code, reexecute instruction
duke@435: 
duke@435: int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
duke@435: 
duke@435: void PatchingStub::align_patch_site(MacroAssembler* masm) {
duke@435:   // We're patching a 5-7 byte instruction on intel and we need to
duke@435:   // make sure that we don't see a piece of the instruction.  It
duke@435:   // appears mostly impossible on Intel to simply invalidate other
duke@435:   // processors caches and since they may do aggressive prefetch it's
duke@435:   // very hard to make a guess about what code might be in the icache.
duke@435:   // Force the instruction to be double word aligned so that it
duke@435:   // doesn't span a cache line.
duke@435:   masm->align(round_to(NativeGeneralJump::instruction_size, wordSize));
duke@435: }
duke@435: 
duke@435: void PatchingStub::emit_code(LIR_Assembler* ce) {
duke@435:   assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, "not enough room for call");
duke@435: 
duke@435:   Label call_patch;
duke@435: 
duke@435:   // static field accesses have special semantics while the class
duke@435:   // initializer is being run so we emit a test which can be used to
duke@435:   // check that this code is being executed by the initializing
duke@435:   // thread.
duke@435:   address being_initialized_entry = __ pc();
duke@435:   if (CommentedAssembly) {
duke@435:     __ block_comment(" patch template");
duke@435:   }
duke@435:   if (_id == load_klass_id) {
duke@435:     // produce a copy of the load klass instruction for use by the being initialized case
coleenp@4037: #ifdef ASSERT
duke@435:     address start = __ pc();
coleenp@4037: #endif
coleenp@4037:     Metadata* o = NULL;
coleenp@4037:     __ mov_metadata(_obj, o);
coleenp@4037: #ifdef ASSERT
coleenp@4037:     for (int i = 0; i < _bytes_to_copy; i++) {
coleenp@4037:       address ptr = (address)(_pc_start + i);
coleenp@4037:       int a_byte = (*ptr) & 0xFF;
coleenp@4037:       assert(a_byte == *start++, "should be the same code");
coleenp@4037:     }
coleenp@4037: #endif
coleenp@4037:   } else if (_id == load_mirror_id) {
coleenp@4037:     // produce a copy of the load mirror instruction for use by the being
coleenp@4037:     // initialized case
coleenp@4037: #ifdef ASSERT
coleenp@4037:     address start = __ pc();
coleenp@4037: #endif
duke@435:     jobject o = NULL;
duke@435:     __ movoop(_obj, o);
duke@435: #ifdef ASSERT
duke@435:     for (int i = 0; i < _bytes_to_copy; i++) {
duke@435:       address ptr = (address)(_pc_start + i);
duke@435:       int a_byte = (*ptr) & 0xFF;
duke@435:       assert(a_byte == *start++, "should be the same code");
duke@435:     }
duke@435: #endif
duke@435:   } else {
duke@435:     // make a copy the code which is going to be patched.
twisti@4366:     for (int i = 0; i < _bytes_to_copy; i++) {
duke@435:       address ptr = (address)(_pc_start + i);
duke@435:       int a_byte = (*ptr) & 0xFF;
twisti@4366:       __ emit_int8(a_byte);
duke@435:       *ptr = 0x90; // make the site look like a nop
duke@435:     }
duke@435:   }
duke@435: 
duke@435:   address end_of_patch = __ pc();
duke@435:   int bytes_to_skip = 0;
coleenp@4037:   if (_id == load_mirror_id) {
duke@435:     int offset = __ offset();
duke@435:     if (CommentedAssembly) {
duke@435:       __ block_comment(" being_initialized check");
duke@435:     }
duke@435:     assert(_obj != noreg, "must be a valid register");
duke@435:     Register tmp = rax;
never@2658:     Register tmp2 = rbx;
never@739:     __ push(tmp);
never@2658:     __ push(tmp2);
iveresov@2746:     // Load without verification to keep code size small. We need it because
iveresov@2746:     // begin_initialized_entry_offset has to fit in a byte. Also, we know it's not null.
coleenp@4037:     __ movptr(tmp2, Address(_obj, java_lang_Class::klass_offset_in_bytes()));
duke@435:     __ get_thread(tmp);
coleenp@4037:     __ cmpptr(tmp, Address(tmp2, InstanceKlass::init_thread_offset()));
never@2658:     __ pop(tmp2);
never@739:     __ pop(tmp);
duke@435:     __ jcc(Assembler::notEqual, call_patch);
duke@435: 
duke@435:     // access_field patches may execute the patched code before it's
duke@435:     // copied back into place so we need to jump back into the main
duke@435:     // code of the nmethod to continue execution.
duke@435:     __ jmp(_patch_site_continuation);
duke@435: 
duke@435:     // make sure this extra code gets skipped
duke@435:     bytes_to_skip += __ offset() - offset;
duke@435:   }
duke@435:   if (CommentedAssembly) {
duke@435:     __ block_comment("patch data encoded as movl");
duke@435:   }
duke@435:   // Now emit the patch record telling the runtime how to find the
duke@435:   // pieces of the patch.  We only need 3 bytes but for readability of
duke@435:   // the disassembly we make the data look like a movl reg, imm32,
duke@435:   // which requires 5 bytes
duke@435:   int sizeof_patch_record = 5;
duke@435:   bytes_to_skip += sizeof_patch_record;
duke@435: 
duke@435:   // emit the offsets needed to find the code to patch
duke@435:   int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record;
duke@435: 
twisti@4366:   __ emit_int8((unsigned char)0xB8);
twisti@4366:   __ emit_int8(0);
twisti@4366:   __ emit_int8(being_initialized_entry_offset);
twisti@4366:   __ emit_int8(bytes_to_skip);
twisti@4366:   __ emit_int8(_bytes_to_copy);
duke@435:   address patch_info_pc = __ pc();
duke@435:   assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
duke@435: 
duke@435:   address entry = __ pc();
duke@435:   NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
duke@435:   address target = NULL;
coleenp@4037:   relocInfo::relocType reloc_type = relocInfo::none;
duke@435:   switch (_id) {
duke@435:     case access_field_id:  target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
coleenp@4037:     case load_klass_id:    target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break;
coleenp@4037:     case load_mirror_id:   target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break;
duke@435:     default: ShouldNotReachHere();
duke@435:   }
duke@435:   __ bind(call_patch);
duke@435: 
duke@435:   if (CommentedAssembly) {
duke@435:     __ block_comment("patch entry point");
duke@435:   }
duke@435:   __ call(RuntimeAddress(target));
duke@435:   assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
duke@435:   ce->add_call_info_here(_info);
duke@435:   int jmp_off = __ offset();
duke@435:   __ jmp(_patch_site_entry);
duke@435:   // Add enough nops so deoptimization can overwrite the jmp above with a call
duke@435:   // and not destroy the world.
duke@435:   for (int j = __ offset() ; j < jmp_off + 5 ; j++ ) {
duke@435:     __ nop();
duke@435:   }
coleenp@4037:   if (_id == load_klass_id || _id == load_mirror_id) {
duke@435:     CodeSection* cs = __ code_section();
duke@435:     RelocIterator iter(cs, (address)_pc_start, (address)(_pc_start + 1));
coleenp@4037:     relocInfo::change_reloc_info_for_address(&iter, (address) _pc_start, reloc_type, relocInfo::none);
duke@435:   }
duke@435: }
duke@435: 
duke@435: 
twisti@1730: void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
twisti@1730:   __ bind(_entry);
twisti@3244:   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
twisti@1730:   ce->add_call_info_here(_info);
twisti@3244:   DEBUG_ONLY(__ should_not_reach_here());
twisti@1730: }
twisti@1730: 
twisti@1730: 
duke@435: void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
duke@435:   ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
duke@435:   __ bind(_entry);
duke@435:   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id)));
duke@435:   ce->add_call_info_here(_info);
duke@435:   debug_only(__ should_not_reach_here());
duke@435: }
duke@435: 
duke@435: 
duke@435: void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
duke@435:   assert(__ rsp_offset() == 0, "frame size should be fixed");
duke@435: 
duke@435:   __ bind(_entry);
duke@435:   // pass the object on stack because all registers must be preserved
duke@435:   if (_obj->is_cpu_register()) {
duke@435:     ce->store_parameter(_obj->as_register(), 0);
duke@435:   }
duke@435:   __ call(RuntimeAddress(Runtime1::entry_for(_stub)));
duke@435:   ce->add_call_info_here(_info);
duke@435:   debug_only(__ should_not_reach_here());
duke@435: }
duke@435: 
duke@435: 
duke@435: void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
duke@435:   //---------------slow case: call to native-----------------
duke@435:   __ bind(_entry);
duke@435:   // Figure out where the args should go
coleenp@4037:   // This should really convert the IntrinsicID to the Method* and signature
duke@435:   // but I don't know how to do that.
duke@435:   //
duke@435:   VMRegPair args[5];
duke@435:   BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
duke@435:   SharedRuntime::java_calling_convention(signature, args, 5, true);
duke@435: 
duke@435:   // push parameters
duke@435:   // (src, src_pos, dest, destPos, length)
duke@435:   Register r[5];
duke@435:   r[0] = src()->as_register();
duke@435:   r[1] = src_pos()->as_register();
duke@435:   r[2] = dst()->as_register();
duke@435:   r[3] = dst_pos()->as_register();
duke@435:   r[4] = length()->as_register();
duke@435: 
duke@435:   // next registers will get stored on the stack
duke@435:   for (int i = 0; i < 5 ; i++ ) {
duke@435:     VMReg r_1 = args[i].first();
duke@435:     if (r_1->is_stack()) {
duke@435:       int st_off = r_1->reg2stack() * wordSize;
never@739:       __ movptr (Address(rsp, st_off), r[i]);
duke@435:     } else {
duke@435:       assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
duke@435:     }
duke@435:   }
duke@435: 
duke@435:   ce->align_call(lir_static_call);
duke@435: 
duke@435:   ce->emit_static_call_stub();
duke@435:   AddressLiteral resolve(SharedRuntime::get_resolve_static_call_stub(),
duke@435:                          relocInfo::static_call_type);
duke@435:   __ call(resolve);
duke@435:   ce->add_call_info_here(info());
duke@435: 
duke@435: #ifndef PRODUCT
never@739:   __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
duke@435: #endif
duke@435: 
duke@435:   __ jmp(_continuation);
duke@435: }
duke@435: 
ysr@777: /////////////////////////////////////////////////////////////////////////////
jprovino@4542: #if INCLUDE_ALL_GCS
ysr@777: 
ysr@777: void G1PreBarrierStub::emit_code(LIR_Assembler* ce) {
johnc@2781:   // At this point we know that marking is in progress.
johnc@2781:   // If do_load() is true then we have to emit the
johnc@2781:   // load of the previous value; otherwise it has already
johnc@2781:   // been loaded into _pre_val.
ysr@777: 
ysr@777:   __ bind(_entry);
ysr@777:   assert(pre_val()->is_register(), "Precondition.");
ysr@777: 
ysr@777:   Register pre_val_reg = pre_val()->as_register();
ysr@777: 
johnc@2781:   if (do_load()) {
johnc@2781:     ce->mem2reg(addr(), pre_val(), T_OBJECT, patch_code(), info(), false /*wide*/, false /*unaligned*/);
johnc@2781:   }
ysr@777: 
apetrusenko@797:   __ cmpptr(pre_val_reg, (int32_t) NULL_WORD);
ysr@777:   __ jcc(Assembler::equal, _continuation);
ysr@777:   ce->store_parameter(pre_val()->as_register(), 0);
ysr@777:   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_pre_barrier_slow_id)));
ysr@777:   __ jmp(_continuation);
ysr@777: 
ysr@777: }
ysr@777: 
ysr@777: jbyte* G1PostBarrierStub::_byte_map_base = NULL;
ysr@777: 
ysr@777: jbyte* G1PostBarrierStub::byte_map_base_slow() {
ysr@777:   BarrierSet* bs = Universe::heap()->barrier_set();
ysr@777:   assert(bs->is_a(BarrierSet::G1SATBCTLogging),
ysr@777:          "Must be if we're using this.");
ysr@777:   return ((G1SATBCardTableModRefBS*)bs)->byte_map_base;
ysr@777: }
ysr@777: 
ysr@777: void G1PostBarrierStub::emit_code(LIR_Assembler* ce) {
ysr@777:   __ bind(_entry);
ysr@777:   assert(addr()->is_register(), "Precondition.");
ysr@777:   assert(new_val()->is_register(), "Precondition.");
ysr@777:   Register new_val_reg = new_val()->as_register();
apetrusenko@797:   __ cmpptr(new_val_reg, (int32_t) NULL_WORD);
ysr@777:   __ jcc(Assembler::equal, _continuation);
never@2228:   ce->store_parameter(addr()->as_pointer_register(), 0);
ysr@777:   __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::g1_post_barrier_slow_id)));
ysr@777:   __ jmp(_continuation);
ysr@777: }
ysr@777: 
jprovino@4542: #endif // INCLUDE_ALL_GCS
ysr@777: /////////////////////////////////////////////////////////////////////////////
duke@435: 
duke@435: #undef __