duke@435: /*
twisti@1730:  * Copyright 1999-2010 Sun Microsystems, Inc.  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:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: class CodeEmitInfo;
duke@435: class LIR_Assembler;
duke@435: class LIR_OpVisitState;
duke@435: 
duke@435: // CodeStubs are little 'out-of-line' pieces of code that
duke@435: // usually handle slow cases of operations. All code stubs
duke@435: // are collected and code is emitted at the end of the
duke@435: // nmethod.
duke@435: 
duke@435: class CodeStub: public CompilationResourceObj {
duke@435:  protected:
duke@435:   Label _entry;                                  // label at the stub entry point
duke@435:   Label _continuation;                           // label where stub continues, if any
duke@435: 
duke@435:  public:
duke@435:   CodeStub() {}
duke@435: 
duke@435:   // code generation
duke@435:   void assert_no_unbound_labels()                { assert(!_entry.is_unbound() && !_continuation.is_unbound(), "unbound label"); }
duke@435:   virtual void emit_code(LIR_Assembler* e) = 0;
duke@435:   virtual CodeEmitInfo* info() const             { return NULL; }
duke@435:   virtual bool is_exception_throw_stub() const   { return false; }
duke@435:   virtual bool is_range_check_stub() const       { return false; }
duke@435:   virtual bool is_divbyzero_stub() const         { return false; }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const = 0;
duke@435: #endif
duke@435: 
duke@435:   // label access
duke@435:   Label* entry()                                 { return &_entry; }
duke@435:   Label* continuation()                          { return &_continuation; }
duke@435:   // for LIR
duke@435:   virtual void visit(LIR_OpVisitState* visit) {
duke@435: #ifndef PRODUCT
duke@435:     if (LIRTracePeephole && Verbose) {
duke@435:       tty->print("no visitor for ");
duke@435:       print_name(tty);
duke@435:       tty->cr();
duke@435:     }
duke@435: #endif
duke@435:   }
duke@435: };
duke@435: 
duke@435: 
duke@435: define_array(CodeStubArray, CodeStub*)
duke@435: define_stack(_CodeStubList, CodeStubArray)
duke@435: 
duke@435: class CodeStubList: public _CodeStubList {
duke@435:  public:
duke@435:   CodeStubList(): _CodeStubList() {}
duke@435: 
duke@435:   void append(CodeStub* stub) {
duke@435:     if (!contains(stub)) {
duke@435:       _CodeStubList::append(stub);
duke@435:     }
duke@435:   }
duke@435: };
duke@435: 
duke@435: #ifdef TIERED
duke@435: class CounterOverflowStub: public CodeStub {
duke@435:  private:
duke@435:   CodeEmitInfo* _info;
duke@435:   int           _bci;
duke@435: 
duke@435: public:
duke@435:   CounterOverflowStub(CodeEmitInfo* info, int bci) : _info(info), _bci(bci) {
duke@435:   }
duke@435: 
duke@435:   virtual void emit_code(LIR_Assembler* e);
duke@435: 
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     visitor->do_slow_case(_info);
duke@435:   }
duke@435: 
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("CounterOverflowStub"); }
duke@435: #endif // PRODUCT
duke@435: 
duke@435: };
duke@435: #endif // TIERED
duke@435: 
duke@435: class ConversionStub: public CodeStub {
duke@435:  private:
duke@435:   Bytecodes::Code _bytecode;
duke@435:   LIR_Opr         _input;
duke@435:   LIR_Opr         _result;
duke@435: 
duke@435:   static float float_zero;
duke@435:   static double double_zero;
duke@435:  public:
duke@435:   ConversionStub(Bytecodes::Code bytecode, LIR_Opr input, LIR_Opr result)
duke@435:     : _bytecode(bytecode), _input(input), _result(result) {
duke@435:   }
duke@435: 
duke@435:   Bytecodes::Code bytecode() { return _bytecode; }
duke@435:   LIR_Opr         input()    { return _input; }
duke@435:   LIR_Opr         result()   { return _result; }
duke@435: 
duke@435:   virtual void emit_code(LIR_Assembler* e);
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     visitor->do_slow_case();
duke@435:     visitor->do_input(_input);
duke@435:     visitor->do_output(_result);
duke@435:   }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("ConversionStub"); }
duke@435: #endif // PRODUCT
duke@435: };
duke@435: 
duke@435: 
duke@435: // Throws ArrayIndexOutOfBoundsException by default but can be
duke@435: // configured to throw IndexOutOfBoundsException in constructor
duke@435: class RangeCheckStub: public CodeStub {
duke@435:  private:
duke@435:   CodeEmitInfo* _info;
duke@435:   LIR_Opr       _index;
duke@435:   bool          _throw_index_out_of_bounds_exception;
duke@435: 
duke@435:  public:
duke@435:   RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, bool throw_index_out_of_bounds_exception = false);
duke@435:   virtual void emit_code(LIR_Assembler* e);
duke@435:   virtual CodeEmitInfo* info() const             { return _info; }
duke@435:   virtual bool is_exception_throw_stub() const   { return true; }
duke@435:   virtual bool is_range_check_stub() const       { return true; }
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     visitor->do_slow_case(_info);
duke@435:     visitor->do_input(_index);
duke@435:   }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("RangeCheckStub"); }
duke@435: #endif // PRODUCT
duke@435: };
duke@435: 
duke@435: 
duke@435: class DivByZeroStub: public CodeStub {
duke@435:  private:
duke@435:   CodeEmitInfo* _info;
duke@435:   int           _offset;
duke@435: 
duke@435:  public:
duke@435:   DivByZeroStub(CodeEmitInfo* info)
duke@435:     : _info(info), _offset(-1) {
duke@435:   }
duke@435:   DivByZeroStub(int offset, CodeEmitInfo* info)
duke@435:     : _info(info), _offset(offset) {
duke@435:   }
duke@435:   virtual void emit_code(LIR_Assembler* e);
duke@435:   virtual CodeEmitInfo* info() const             { return _info; }
duke@435:   virtual bool is_exception_throw_stub() const   { return true; }
duke@435:   virtual bool is_divbyzero_stub() const         { return true; }
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     visitor->do_slow_case(_info);
duke@435:   }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("DivByZeroStub"); }
duke@435: #endif // PRODUCT
duke@435: };
duke@435: 
duke@435: 
duke@435: class ImplicitNullCheckStub: public CodeStub {
duke@435:  private:
duke@435:   CodeEmitInfo* _info;
duke@435:   int           _offset;
duke@435: 
duke@435:  public:
duke@435:   ImplicitNullCheckStub(int offset, CodeEmitInfo* info)
duke@435:     : _offset(offset), _info(info) {
duke@435:   }
duke@435:   virtual void emit_code(LIR_Assembler* e);
duke@435:   virtual CodeEmitInfo* info() const             { return _info; }
duke@435:   virtual bool is_exception_throw_stub() const   { return true; }
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     visitor->do_slow_case(_info);
duke@435:   }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("ImplicitNullCheckStub"); }
duke@435: #endif // PRODUCT
duke@435: };
duke@435: 
duke@435: 
duke@435: class NewInstanceStub: public CodeStub {
duke@435:  private:
duke@435:   ciInstanceKlass* _klass;
duke@435:   LIR_Opr          _klass_reg;
duke@435:   LIR_Opr          _result;
duke@435:   CodeEmitInfo*    _info;
duke@435:   Runtime1::StubID _stub_id;
duke@435: 
duke@435:  public:
duke@435:   NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id);
duke@435:   virtual void emit_code(LIR_Assembler* e);
duke@435:   virtual CodeEmitInfo* info() const             { return _info; }
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     visitor->do_slow_case(_info);
duke@435:     visitor->do_input(_klass_reg);
duke@435:     visitor->do_output(_result);
duke@435:   }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("NewInstanceStub"); }
duke@435: #endif // PRODUCT
duke@435: };
duke@435: 
duke@435: 
duke@435: class NewTypeArrayStub: public CodeStub {
duke@435:  private:
duke@435:   LIR_Opr       _klass_reg;
duke@435:   LIR_Opr       _length;
duke@435:   LIR_Opr       _result;
duke@435:   CodeEmitInfo* _info;
duke@435: 
duke@435:  public:
duke@435:   NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info);
duke@435:   virtual void emit_code(LIR_Assembler* e);
duke@435:   virtual CodeEmitInfo* info() const             { return _info; }
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     visitor->do_slow_case(_info);
duke@435:     visitor->do_input(_klass_reg);
duke@435:     visitor->do_input(_length);
duke@435:     assert(_result->is_valid(), "must be valid"); visitor->do_output(_result);
duke@435:   }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("NewTypeArrayStub"); }
duke@435: #endif // PRODUCT
duke@435: };
duke@435: 
duke@435: 
duke@435: class NewObjectArrayStub: public CodeStub {
duke@435:  private:
duke@435:   LIR_Opr        _klass_reg;
duke@435:   LIR_Opr        _length;
duke@435:   LIR_Opr        _result;
duke@435:   CodeEmitInfo*  _info;
duke@435: 
duke@435:  public:
duke@435:   NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info);
duke@435:   virtual void emit_code(LIR_Assembler* e);
duke@435:   virtual CodeEmitInfo* info() const             { return _info; }
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     visitor->do_slow_case(_info);
duke@435:     visitor->do_input(_klass_reg);
duke@435:     visitor->do_input(_length);
duke@435:     assert(_result->is_valid(), "must be valid"); visitor->do_output(_result);
duke@435:   }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("NewObjectArrayStub"); }
duke@435: #endif // PRODUCT
duke@435: };
duke@435: 
duke@435: 
duke@435: class MonitorAccessStub: public CodeStub {
duke@435:  protected:
duke@435:   LIR_Opr _obj_reg;
duke@435:   LIR_Opr _lock_reg;
duke@435: 
duke@435:  public:
duke@435:   MonitorAccessStub(LIR_Opr obj_reg, LIR_Opr lock_reg) {
duke@435:     _obj_reg  = obj_reg;
duke@435:     _lock_reg  = lock_reg;
duke@435:   }
duke@435: 
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("MonitorAccessStub"); }
duke@435: #endif // PRODUCT
duke@435: };
duke@435: 
duke@435: 
duke@435: class MonitorEnterStub: public MonitorAccessStub {
duke@435:  private:
duke@435:   CodeEmitInfo* _info;
duke@435: 
duke@435:  public:
duke@435:   MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info);
duke@435: 
duke@435:   virtual void emit_code(LIR_Assembler* e);
duke@435:   virtual CodeEmitInfo* info() const             { return _info; }
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     visitor->do_input(_obj_reg);
duke@435:     visitor->do_input(_lock_reg);
duke@435:     visitor->do_slow_case(_info);
duke@435:   }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("MonitorEnterStub"); }
duke@435: #endif // PRODUCT
duke@435: };
duke@435: 
duke@435: 
duke@435: class MonitorExitStub: public MonitorAccessStub {
duke@435:  private:
duke@435:   bool _compute_lock;
duke@435:   int  _monitor_ix;
duke@435: 
duke@435:  public:
duke@435:   MonitorExitStub(LIR_Opr lock_reg, bool compute_lock, int monitor_ix)
duke@435:     : MonitorAccessStub(LIR_OprFact::illegalOpr, lock_reg),
duke@435:       _compute_lock(compute_lock), _monitor_ix(monitor_ix) { }
duke@435:   virtual void emit_code(LIR_Assembler* e);
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     assert(_obj_reg->is_illegal(), "unused");
duke@435:     if (_compute_lock) {
duke@435:       visitor->do_temp(_lock_reg);
duke@435:     } else {
duke@435:       visitor->do_input(_lock_reg);
duke@435:     }
duke@435:   }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("MonitorExitStub"); }
duke@435: #endif // PRODUCT
duke@435: };
duke@435: 
duke@435: 
duke@435: class PatchingStub: public CodeStub {
duke@435:  public:
duke@435:   enum PatchID {
duke@435:     access_field_id,
duke@435:     load_klass_id
duke@435:   };
duke@435:   enum constants {
duke@435:     patch_info_size = 3
duke@435:   };
duke@435:  private:
duke@435:   PatchID       _id;
duke@435:   address       _pc_start;
duke@435:   int           _bytes_to_copy;
duke@435:   Label         _patched_code_entry;
duke@435:   Label         _patch_site_entry;
duke@435:   Label         _patch_site_continuation;
duke@435:   Register      _obj;
duke@435:   CodeEmitInfo* _info;
duke@435:   int           _oop_index;  // index of the patchable oop in nmethod oop table if needed
duke@435:   static int    _patch_info_offset;
duke@435: 
duke@435:   void align_patch_site(MacroAssembler* masm);
duke@435: 
duke@435:  public:
duke@435:   static int patch_info_offset() { return _patch_info_offset; }
duke@435: 
duke@435:   PatchingStub(MacroAssembler* masm, PatchID id, int oop_index = -1):
duke@435:       _id(id)
duke@435:     , _info(NULL)
duke@435:     , _oop_index(oop_index) {
duke@435:     if (os::is_MP()) {
duke@435:       // force alignment of patch sites on MP hardware so we
duke@435:       // can guarantee atomic writes to the patch site.
duke@435:       align_patch_site(masm);
duke@435:     }
duke@435:     _pc_start = masm->pc();
duke@435:     masm->bind(_patch_site_entry);
duke@435:   }
duke@435: 
duke@435:   void install(MacroAssembler* masm, LIR_PatchCode patch_code, Register obj, CodeEmitInfo* info) {
duke@435:     _info = info;
duke@435:     _obj = obj;
duke@435:     masm->bind(_patch_site_continuation);
duke@435:     _bytes_to_copy = masm->pc() - pc_start();
duke@435:     if (_id == PatchingStub::access_field_id) {
duke@435:       // embed a fixed offset to handle long patches which need to be offset by a word.
duke@435:       // the patching code will just add the field offset field to this offset so
duke@435:       // that we can refernce either the high or low word of a double word field.
duke@435:       int field_offset = 0;
duke@435:       switch (patch_code) {
duke@435:       case lir_patch_low:         field_offset = lo_word_offset_in_bytes; break;
duke@435:       case lir_patch_high:        field_offset = hi_word_offset_in_bytes; break;
duke@435:       case lir_patch_normal:      field_offset = 0;                       break;
duke@435:       default: ShouldNotReachHere();
duke@435:       }
duke@435:       NativeMovRegMem* n_move = nativeMovRegMem_at(pc_start());
duke@435:       n_move->set_offset(field_offset);
duke@435:     } else if (_id == load_klass_id) {
duke@435:       assert(_obj != noreg, "must have register object for load_klass");
duke@435: #ifdef ASSERT
duke@435:       // verify that we're pointing at a NativeMovConstReg
duke@435:       nativeMovConstReg_at(pc_start());
duke@435: #endif
duke@435:     } else {
duke@435:       ShouldNotReachHere();
duke@435:     }
duke@435:     assert(_bytes_to_copy <= (masm->pc() - pc_start()), "not enough bytes");
duke@435:   }
duke@435: 
duke@435:   address pc_start() const                       { return _pc_start; }
duke@435:   PatchID id() const                             { return _id; }
duke@435: 
duke@435:   virtual void emit_code(LIR_Assembler* e);
duke@435:   virtual CodeEmitInfo* info() const             { return _info; }
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     visitor->do_slow_case(_info);
duke@435:   }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("PatchingStub"); }
duke@435: #endif // PRODUCT
duke@435: };
duke@435: 
duke@435: 
twisti@1730: //------------------------------------------------------------------------------
twisti@1730: // DeoptimizeStub
twisti@1730: //
twisti@1730: class DeoptimizeStub : public CodeStub {
twisti@1730: private:
twisti@1730:   CodeEmitInfo* _info;
twisti@1730: 
twisti@1730: public:
twisti@1730:   DeoptimizeStub(CodeEmitInfo* info) : _info(new CodeEmitInfo(info)) {}
twisti@1730: 
twisti@1730:   virtual void emit_code(LIR_Assembler* e);
twisti@1730:   virtual CodeEmitInfo* info() const           { return _info; }
twisti@1730:   virtual bool is_exception_throw_stub() const { return true; }
twisti@1730:   virtual void visit(LIR_OpVisitState* visitor) {
twisti@1730:     visitor->do_slow_case(_info);
twisti@1730:   }
twisti@1730: #ifndef PRODUCT
twisti@1730:   virtual void print_name(outputStream* out) const { out->print("DeoptimizeStub"); }
twisti@1730: #endif // PRODUCT
twisti@1730: };
twisti@1730: 
twisti@1730: 
duke@435: class SimpleExceptionStub: public CodeStub {
duke@435:  private:
duke@435:   LIR_Opr          _obj;
duke@435:   Runtime1::StubID _stub;
duke@435:   CodeEmitInfo*    _info;
duke@435: 
duke@435:  public:
duke@435:   SimpleExceptionStub(Runtime1::StubID stub, LIR_Opr obj, CodeEmitInfo* info):
duke@435:     _obj(obj), _info(info), _stub(stub) {
duke@435:   }
duke@435: 
duke@435:   virtual void emit_code(LIR_Assembler* e);
duke@435:   virtual CodeEmitInfo* info() const             { return _info; }
duke@435:   virtual bool is_exception_throw_stub() const   { return true; }
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     if (_obj->is_valid()) visitor->do_input(_obj);
duke@435:     visitor->do_slow_case(_info);
duke@435:   }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("SimpleExceptionStub"); }
duke@435: #endif // PRODUCT
duke@435: };
duke@435: 
duke@435: 
duke@435: 
duke@435: class ArrayStoreExceptionStub: public CodeStub {
duke@435:  private:
duke@435:   CodeEmitInfo* _info;
duke@435: 
duke@435:  public:
duke@435:   ArrayStoreExceptionStub(CodeEmitInfo* info);
duke@435:   virtual void emit_code(LIR_Assembler* emit);
duke@435:   virtual CodeEmitInfo* info() const             { return _info; }
duke@435:   virtual bool is_exception_throw_stub() const   { return true; }
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     visitor->do_slow_case(_info);
duke@435:   }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("ArrayStoreExceptionStub"); }
duke@435: #endif // PRODUCT
duke@435: };
duke@435: 
duke@435: 
duke@435: class ArrayCopyStub: public CodeStub {
duke@435:  private:
duke@435:   LIR_OpArrayCopy* _op;
duke@435: 
duke@435:  public:
duke@435:   ArrayCopyStub(LIR_OpArrayCopy* op): _op(op) { }
duke@435: 
duke@435:   LIR_Opr src() const                         { return _op->src(); }
duke@435:   LIR_Opr src_pos() const                     { return _op->src_pos(); }
duke@435:   LIR_Opr dst() const                         { return _op->dst(); }
duke@435:   LIR_Opr dst_pos() const                     { return _op->dst_pos(); }
duke@435:   LIR_Opr length() const                      { return _op->length(); }
duke@435:   LIR_Opr tmp() const                         { return _op->tmp(); }
duke@435: 
duke@435:   virtual void emit_code(LIR_Assembler* e);
duke@435:   virtual CodeEmitInfo* info() const          { return _op->info(); }
duke@435:   virtual void visit(LIR_OpVisitState* visitor) {
duke@435:     // don't pass in the code emit info since it's processed in the fast path
duke@435:     visitor->do_slow_case();
duke@435:   }
duke@435: #ifndef PRODUCT
duke@435:   virtual void print_name(outputStream* out) const { out->print("ArrayCopyStub"); }
duke@435: #endif // PRODUCT
duke@435: };
ysr@777: 
ysr@777: //////////////////////////////////////////////////////////////////////////////////////////
ysr@777: #ifndef SERIALGC
ysr@777: 
ysr@777: // Code stubs for Garbage-First barriers.
ysr@777: class G1PreBarrierStub: public CodeStub {
ysr@777:  private:
ysr@777:   LIR_Opr _addr;
ysr@777:   LIR_Opr _pre_val;
ysr@777:   LIR_PatchCode _patch_code;
ysr@777:   CodeEmitInfo* _info;
ysr@777: 
ysr@777:  public:
ysr@777:   // pre_val (a temporary register) must be a register;
ysr@777:   // addr (the address of the field to be read) must be a LIR_Address
ysr@777:   G1PreBarrierStub(LIR_Opr addr, LIR_Opr pre_val, LIR_PatchCode patch_code, CodeEmitInfo* info) :
ysr@777:     _addr(addr), _pre_val(pre_val), _patch_code(patch_code), _info(info)
ysr@777:   {
ysr@777:     assert(_pre_val->is_register(), "should be temporary register");
ysr@777:     assert(_addr->is_address(), "should be the address of the field");
ysr@777:   }
ysr@777: 
ysr@777:   LIR_Opr addr() const { return _addr; }
ysr@777:   LIR_Opr pre_val() const { return _pre_val; }
ysr@777:   LIR_PatchCode patch_code() const { return _patch_code; }
ysr@777:   CodeEmitInfo* info() const { return _info; }
ysr@777: 
ysr@777:   virtual void emit_code(LIR_Assembler* e);
ysr@777:   virtual void visit(LIR_OpVisitState* visitor) {
ysr@777:     // don't pass in the code emit info since it's processed in the fast
ysr@777:     // path
ysr@777:     if (_info != NULL)
ysr@777:       visitor->do_slow_case(_info);
ysr@777:     else
ysr@777:       visitor->do_slow_case();
ysr@777:     visitor->do_input(_addr);
ysr@777:     visitor->do_temp(_pre_val);
ysr@777:   }
ysr@777: #ifndef PRODUCT
ysr@777:   virtual void print_name(outputStream* out) const { out->print("G1PreBarrierStub"); }
ysr@777: #endif // PRODUCT
ysr@777: };
ysr@777: 
ysr@777: class G1PostBarrierStub: public CodeStub {
ysr@777:  private:
ysr@777:   LIR_Opr _addr;
ysr@777:   LIR_Opr _new_val;
ysr@777: 
ysr@777:   static jbyte* _byte_map_base;
ysr@777:   static jbyte* byte_map_base_slow();
ysr@777:   static jbyte* byte_map_base() {
ysr@777:     if (_byte_map_base == NULL) {
ysr@777:       _byte_map_base = byte_map_base_slow();
ysr@777:     }
ysr@777:     return _byte_map_base;
ysr@777:   }
ysr@777: 
ysr@777:  public:
ysr@777:   // addr (the address of the object head) and new_val must be registers.
ysr@777:   G1PostBarrierStub(LIR_Opr addr, LIR_Opr new_val): _addr(addr), _new_val(new_val) { }
ysr@777: 
ysr@777:   LIR_Opr addr() const { return _addr; }
ysr@777:   LIR_Opr new_val() const { return _new_val; }
ysr@777: 
ysr@777:   virtual void emit_code(LIR_Assembler* e);
ysr@777:   virtual void visit(LIR_OpVisitState* visitor) {
ysr@777:     // don't pass in the code emit info since it's processed in the fast path
ysr@777:     visitor->do_slow_case();
ysr@777:     visitor->do_input(_addr);
ysr@777:     visitor->do_input(_new_val);
ysr@777:   }
ysr@777: #ifndef PRODUCT
ysr@777:   virtual void print_name(outputStream* out) const { out->print("G1PostBarrierStub"); }
ysr@777: #endif // PRODUCT
ysr@777: };
ysr@777: 
ysr@777: #endif // SERIALGC
ysr@777: //////////////////////////////////////////////////////////////////////////////////////////