aoqi@0: /*
aoqi@0:  * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #ifndef SHARE_VM_C1_C1_CODESTUBS_HPP
aoqi@0: #define SHARE_VM_C1_C1_CODESTUBS_HPP
aoqi@0: 
aoqi@0: #include "c1/c1_FrameMap.hpp"
aoqi@0: #include "c1/c1_IR.hpp"
aoqi@0: #include "c1/c1_Instruction.hpp"
aoqi@0: #include "c1/c1_LIR.hpp"
aoqi@0: #include "c1/c1_Runtime1.hpp"
aoqi@0: #include "utilities/array.hpp"
aoqi@0: #include "utilities/macros.hpp"
aoqi@0: 
aoqi@0: class CodeEmitInfo;
aoqi@0: class LIR_Assembler;
aoqi@0: class LIR_OpVisitState;
aoqi@0: 
aoqi@0: // CodeStubs are little 'out-of-line' pieces of code that
aoqi@0: // usually handle slow cases of operations. All code stubs
aoqi@0: // are collected and code is emitted at the end of the
aoqi@0: // nmethod.
aoqi@0: 
aoqi@0: class CodeStub: public CompilationResourceObj {
aoqi@0:  protected:
aoqi@0:   Label _entry;                                  // label at the stub entry point
aoqi@0:   Label _continuation;                           // label where stub continues, if any
aoqi@0: 
aoqi@0:  public:
aoqi@0:   CodeStub() {}
aoqi@0: 
aoqi@0:   // code generation
aoqi@0:   void assert_no_unbound_labels()                { assert(!_entry.is_unbound() && !_continuation.is_unbound(), "unbound label"); }
aoqi@0:   virtual void emit_code(LIR_Assembler* e) = 0;
aoqi@0:   virtual CodeEmitInfo* info() const             { return NULL; }
aoqi@0:   virtual bool is_exception_throw_stub() const   { return false; }
aoqi@0:   virtual bool is_range_check_stub() const       { return false; }
aoqi@0:   virtual bool is_divbyzero_stub() const         { return false; }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const = 0;
aoqi@0: #endif
aoqi@0: 
aoqi@0:   // label access
aoqi@0:   Label* entry()                                 { return &_entry; }
aoqi@0:   Label* continuation()                          { return &_continuation; }
aoqi@0:   // for LIR
aoqi@0:   virtual void visit(LIR_OpVisitState* visit) {
aoqi@0: #ifndef PRODUCT
aoqi@0:     if (LIRTracePeephole && Verbose) {
aoqi@0:       tty->print("no visitor for ");
aoqi@0:       print_name(tty);
aoqi@0:       tty->cr();
aoqi@0:     }
aoqi@0: #endif
aoqi@0:   }
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: define_array(CodeStubArray, CodeStub*)
aoqi@0: define_stack(_CodeStubList, CodeStubArray)
aoqi@0: 
aoqi@0: class CodeStubList: public _CodeStubList {
aoqi@0:  public:
aoqi@0:   CodeStubList(): _CodeStubList() {}
aoqi@0: 
aoqi@0:   void append(CodeStub* stub) {
aoqi@0:     if (!contains(stub)) {
aoqi@0:       _CodeStubList::append(stub);
aoqi@0:     }
aoqi@0:   }
aoqi@0: };
aoqi@0: 
aoqi@0: class CounterOverflowStub: public CodeStub {
aoqi@0:  private:
aoqi@0:   CodeEmitInfo* _info;
aoqi@0:   int           _bci;
aoqi@0:   LIR_Opr       _method;
aoqi@0: 
aoqi@0: public:
aoqi@0:   CounterOverflowStub(CodeEmitInfo* info, int bci, LIR_Opr method) :  _info(info), _bci(bci), _method(method) {
aoqi@0:   }
aoqi@0: 
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0: 
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     visitor->do_slow_case(_info);
aoqi@0:     visitor->do_input(_method);
aoqi@0:   }
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("CounterOverflowStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: 
aoqi@0: };
aoqi@0: 
aoqi@0: class ConversionStub: public CodeStub {
aoqi@0:  private:
aoqi@0:   Bytecodes::Code _bytecode;
aoqi@0:   LIR_Opr         _input;
aoqi@0:   LIR_Opr         _result;
aoqi@0: 
aoqi@0:   static float float_zero;
aoqi@0:   static double double_zero;
aoqi@0:  public:
aoqi@0:   ConversionStub(Bytecodes::Code bytecode, LIR_Opr input, LIR_Opr result)
aoqi@0:     : _bytecode(bytecode), _input(input), _result(result) {
aoqi@0:   }
aoqi@0: 
aoqi@0:   Bytecodes::Code bytecode() { return _bytecode; }
aoqi@0:   LIR_Opr         input()    { return _input; }
aoqi@0:   LIR_Opr         result()   { return _result; }
aoqi@0: 
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     visitor->do_slow_case();
aoqi@0:     visitor->do_input(_input);
aoqi@0:     visitor->do_output(_result);
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("ConversionStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: // Throws ArrayIndexOutOfBoundsException by default but can be
aoqi@0: // configured to throw IndexOutOfBoundsException in constructor
aoqi@0: class RangeCheckStub: public CodeStub {
aoqi@0:  private:
aoqi@0:   CodeEmitInfo* _info;
aoqi@0:   LIR_Opr       _index;
aoqi@0:   bool          _throw_index_out_of_bounds_exception;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, bool throw_index_out_of_bounds_exception = false);
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual CodeEmitInfo* info() const             { return _info; }
aoqi@0:   virtual bool is_exception_throw_stub() const   { return true; }
aoqi@0:   virtual bool is_range_check_stub() const       { return true; }
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     visitor->do_slow_case(_info);
aoqi@0:     visitor->do_input(_index);
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("RangeCheckStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: // stub used when predicate fails and deoptimization is needed
aoqi@0: class PredicateFailedStub: public CodeStub {
aoqi@0:  private:
aoqi@0:   CodeEmitInfo* _info;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   PredicateFailedStub(CodeEmitInfo* info);
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual CodeEmitInfo* info() const             { return _info; }
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     visitor->do_slow_case(_info);
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("PredicateFailedStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: class DivByZeroStub: public CodeStub {
aoqi@0:  private:
aoqi@0:   CodeEmitInfo* _info;
aoqi@0:   int           _offset;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   DivByZeroStub(CodeEmitInfo* info)
aoqi@0:     : _info(info), _offset(-1) {
aoqi@0:   }
aoqi@0:   DivByZeroStub(int offset, CodeEmitInfo* info)
aoqi@0:     : _info(info), _offset(offset) {
aoqi@0:   }
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual CodeEmitInfo* info() const             { return _info; }
aoqi@0:   virtual bool is_exception_throw_stub() const   { return true; }
aoqi@0:   virtual bool is_divbyzero_stub() const         { return true; }
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     visitor->do_slow_case(_info);
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("DivByZeroStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: class ImplicitNullCheckStub: public CodeStub {
aoqi@0:  private:
aoqi@0:   CodeEmitInfo* _info;
aoqi@0:   int           _offset;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   ImplicitNullCheckStub(int offset, CodeEmitInfo* info)
aoqi@0:     : _offset(offset), _info(info) {
aoqi@0:   }
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual CodeEmitInfo* info() const             { return _info; }
aoqi@0:   virtual bool is_exception_throw_stub() const   { return true; }
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     visitor->do_slow_case(_info);
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("ImplicitNullCheckStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: class NewInstanceStub: public CodeStub {
aoqi@0:  private:
aoqi@0:   ciInstanceKlass* _klass;
aoqi@0:   LIR_Opr          _klass_reg;
aoqi@0:   LIR_Opr          _result;
aoqi@0:   CodeEmitInfo*    _info;
aoqi@0:   Runtime1::StubID _stub_id;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id);
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual CodeEmitInfo* info() const             { return _info; }
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     visitor->do_slow_case(_info);
aoqi@0:     visitor->do_input(_klass_reg);
aoqi@0:     visitor->do_output(_result);
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("NewInstanceStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: class NewTypeArrayStub: public CodeStub {
aoqi@0:  private:
aoqi@0:   LIR_Opr       _klass_reg;
aoqi@0:   LIR_Opr       _length;
aoqi@0:   LIR_Opr       _result;
aoqi@0:   CodeEmitInfo* _info;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info);
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual CodeEmitInfo* info() const             { return _info; }
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     visitor->do_slow_case(_info);
aoqi@0:     visitor->do_input(_klass_reg);
aoqi@0:     visitor->do_input(_length);
aoqi@0:     assert(_result->is_valid(), "must be valid"); visitor->do_output(_result);
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("NewTypeArrayStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: class NewObjectArrayStub: public CodeStub {
aoqi@0:  private:
aoqi@0:   LIR_Opr        _klass_reg;
aoqi@0:   LIR_Opr        _length;
aoqi@0:   LIR_Opr        _result;
aoqi@0:   CodeEmitInfo*  _info;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info);
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual CodeEmitInfo* info() const             { return _info; }
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     visitor->do_slow_case(_info);
aoqi@0:     visitor->do_input(_klass_reg);
aoqi@0:     visitor->do_input(_length);
aoqi@0:     assert(_result->is_valid(), "must be valid"); visitor->do_output(_result);
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("NewObjectArrayStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: class MonitorAccessStub: public CodeStub {
aoqi@0:  protected:
aoqi@0:   LIR_Opr _obj_reg;
aoqi@0:   LIR_Opr _lock_reg;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   MonitorAccessStub(LIR_Opr obj_reg, LIR_Opr lock_reg) {
aoqi@0:     _obj_reg  = obj_reg;
aoqi@0:     _lock_reg  = lock_reg;
aoqi@0:   }
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("MonitorAccessStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: class MonitorEnterStub: public MonitorAccessStub {
aoqi@0:  private:
aoqi@0:   CodeEmitInfo* _info;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info);
aoqi@0: 
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual CodeEmitInfo* info() const             { return _info; }
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     visitor->do_input(_obj_reg);
aoqi@0:     visitor->do_input(_lock_reg);
aoqi@0:     visitor->do_slow_case(_info);
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("MonitorEnterStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: class MonitorExitStub: public MonitorAccessStub {
aoqi@0:  private:
aoqi@0:   bool _compute_lock;
aoqi@0:   int  _monitor_ix;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   MonitorExitStub(LIR_Opr lock_reg, bool compute_lock, int monitor_ix)
aoqi@0:     : MonitorAccessStub(LIR_OprFact::illegalOpr, lock_reg),
aoqi@0:       _compute_lock(compute_lock), _monitor_ix(monitor_ix) { }
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     assert(_obj_reg->is_illegal(), "unused");
aoqi@0:     if (_compute_lock) {
aoqi@0:       visitor->do_temp(_lock_reg);
aoqi@0:     } else {
aoqi@0:       visitor->do_input(_lock_reg);
aoqi@0:     }
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("MonitorExitStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: class PatchingStub: public CodeStub {
aoqi@0:  public:
aoqi@0:   enum PatchID {
aoqi@0:     access_field_id,
aoqi@0:     load_klass_id,
aoqi@0:     load_mirror_id,
aoqi@0:     load_appendix_id
aoqi@0:   };
aoqi@0:   enum constants {
aoqi@0:     patch_info_size = 3
aoqi@0:   };
aoqi@0:  private:
aoqi@0:   PatchID       _id;
aoqi@0:   address       _pc_start;
aoqi@0:   int           _bytes_to_copy;
aoqi@0:   Label         _patched_code_entry;
aoqi@0:   Label         _patch_site_entry;
aoqi@0:   Label         _patch_site_continuation;
aoqi@0:   Register      _obj;
aoqi@0:   CodeEmitInfo* _info;
aoqi@0:   int           _index;  // index of the patchable oop or Klass* in nmethod oop or metadata table if needed
aoqi@0:   static int    _patch_info_offset;
aoqi@0: 
aoqi@0:   void align_patch_site(MacroAssembler* masm);
aoqi@0: 
aoqi@0:  public:
aoqi@0:   static int patch_info_offset() { return _patch_info_offset; }
aoqi@0: 
aoqi@0:   PatchingStub(MacroAssembler* masm, PatchID id, int index = -1):
aoqi@0:       _id(id)
aoqi@0:     , _info(NULL)
aoqi@0:     , _index(index) {
aoqi@0:     if (os::is_MP()) {
aoqi@0:       // force alignment of patch sites on MP hardware so we
aoqi@0:       // can guarantee atomic writes to the patch site.
aoqi@0:       align_patch_site(masm);
aoqi@0:     }
aoqi@0:     _pc_start = masm->pc();
aoqi@0:     masm->bind(_patch_site_entry);
aoqi@0:   }
aoqi@0: 
aoqi@0:   void install(MacroAssembler* masm, LIR_PatchCode patch_code, Register obj, CodeEmitInfo* info) {
aoqi@0:     _info = info;
aoqi@0:     _obj = obj;
aoqi@0:     masm->bind(_patch_site_continuation);
aoqi@0:     _bytes_to_copy = masm->pc() - pc_start();
aoqi@0:     if (_id == PatchingStub::access_field_id) {
aoqi@0:       // embed a fixed offset to handle long patches which need to be offset by a word.
aoqi@0:       // the patching code will just add the field offset field to this offset so
aoqi@0:       // that we can refernce either the high or low word of a double word field.
aoqi@0:       int field_offset = 0;
aoqi@0:       switch (patch_code) {
aoqi@0:       case lir_patch_low:         field_offset = lo_word_offset_in_bytes; break;
aoqi@0:       case lir_patch_high:        field_offset = hi_word_offset_in_bytes; break;
aoqi@0:       case lir_patch_normal:      field_offset = 0;                       break;
aoqi@0:       default: ShouldNotReachHere();
aoqi@0:       }
aoqi@0:       NativeMovRegMem* n_move = nativeMovRegMem_at(pc_start());
aoqi@0:       n_move->set_offset(field_offset);
aoqi@0:     } else if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) {
aoqi@0:       assert(_obj != noreg, "must have register object for load_klass/load_mirror");
aoqi@0: #ifdef ASSERT
aoqi@0:       // verify that we're pointing at a NativeMovConstReg
aoqi@0:       nativeMovConstReg_at(pc_start());
aoqi@0: #endif
aoqi@0:     } else {
aoqi@0:       ShouldNotReachHere();
aoqi@0:     }
aoqi@0:     assert(_bytes_to_copy <= (masm->pc() - pc_start()), "not enough bytes");
aoqi@0:   }
aoqi@0: 
aoqi@0:   address pc_start() const                       { return _pc_start; }
aoqi@0:   PatchID id() const                             { return _id; }
aoqi@0: 
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual CodeEmitInfo* info() const             { return _info; }
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     visitor->do_slow_case(_info);
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("PatchingStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: //------------------------------------------------------------------------------
aoqi@0: // DeoptimizeStub
aoqi@0: //
aoqi@0: class DeoptimizeStub : public CodeStub {
aoqi@0: private:
aoqi@0:   CodeEmitInfo* _info;
aoqi@0: 
aoqi@0: public:
aoqi@0:   DeoptimizeStub(CodeEmitInfo* info) : _info(new CodeEmitInfo(info)) {}
aoqi@0: 
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual CodeEmitInfo* info() const           { return _info; }
aoqi@0:   virtual bool is_exception_throw_stub() const { return true; }
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     visitor->do_slow_case(_info);
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("DeoptimizeStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: class SimpleExceptionStub: public CodeStub {
aoqi@0:  private:
aoqi@0:   LIR_Opr          _obj;
aoqi@0:   Runtime1::StubID _stub;
aoqi@0:   CodeEmitInfo*    _info;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   SimpleExceptionStub(Runtime1::StubID stub, LIR_Opr obj, CodeEmitInfo* info):
aoqi@0:     _obj(obj), _info(info), _stub(stub) {
aoqi@0:   }
aoqi@0: 
aoqi@0:   void set_obj(LIR_Opr obj) {
aoqi@0:     _obj = obj;
aoqi@0:   }
aoqi@0: 
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual CodeEmitInfo* info() const             { return _info; }
aoqi@0:   virtual bool is_exception_throw_stub() const   { return true; }
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     if (_obj->is_valid()) visitor->do_input(_obj);
aoqi@0:     visitor->do_slow_case(_info);
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("SimpleExceptionStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: 
aoqi@0: class ArrayStoreExceptionStub: public SimpleExceptionStub {
aoqi@0:  private:
aoqi@0:   CodeEmitInfo* _info;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   ArrayStoreExceptionStub(LIR_Opr obj, CodeEmitInfo* info): SimpleExceptionStub(Runtime1::throw_array_store_exception_id, obj, info) {}
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("ArrayStoreExceptionStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: class ArrayCopyStub: public CodeStub {
aoqi@0:  private:
aoqi@0:   LIR_OpArrayCopy* _op;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   ArrayCopyStub(LIR_OpArrayCopy* op): _op(op) { }
aoqi@0: 
aoqi@0:   LIR_Opr src() const                         { return _op->src(); }
aoqi@0:   LIR_Opr src_pos() const                     { return _op->src_pos(); }
aoqi@0:   LIR_Opr dst() const                         { return _op->dst(); }
aoqi@0:   LIR_Opr dst_pos() const                     { return _op->dst_pos(); }
aoqi@0:   LIR_Opr length() const                      { return _op->length(); }
aoqi@0:   LIR_Opr tmp() const                         { return _op->tmp(); }
aoqi@0: 
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual CodeEmitInfo* info() const          { return _op->info(); }
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     // don't pass in the code emit info since it's processed in the fast path
aoqi@0:     visitor->do_slow_case();
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("ArrayCopyStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: //////////////////////////////////////////////////////////////////////////////////////////
aoqi@0: #if INCLUDE_ALL_GCS
aoqi@0: 
aoqi@0: // Code stubs for Garbage-First barriers.
aoqi@0: class G1PreBarrierStub: public CodeStub {
aoqi@0:  private:
aoqi@0:   bool _do_load;
aoqi@0:   LIR_Opr _addr;
aoqi@0:   LIR_Opr _pre_val;
aoqi@0:   LIR_PatchCode _patch_code;
aoqi@0:   CodeEmitInfo* _info;
aoqi@0: 
aoqi@0:  public:
aoqi@0:   // Version that _does_ generate a load of the previous value from addr.
aoqi@0:   // addr (the address of the field to be read) must be a LIR_Address
aoqi@0:   // pre_val (a temporary register) must be a register;
aoqi@0:   G1PreBarrierStub(LIR_Opr addr, LIR_Opr pre_val, LIR_PatchCode patch_code, CodeEmitInfo* info) :
aoqi@0:     _addr(addr), _pre_val(pre_val), _do_load(true),
aoqi@0:     _patch_code(patch_code), _info(info)
aoqi@0:   {
aoqi@0:     assert(_pre_val->is_register(), "should be temporary register");
aoqi@0:     assert(_addr->is_address(), "should be the address of the field");
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Version that _does not_ generate load of the previous value; the
aoqi@0:   // previous value is assumed to have already been loaded into pre_val.
aoqi@0:   G1PreBarrierStub(LIR_Opr pre_val) :
aoqi@0:     _addr(LIR_OprFact::illegalOpr), _pre_val(pre_val), _do_load(false),
aoqi@0:     _patch_code(lir_patch_none), _info(NULL)
aoqi@0:   {
aoqi@0:     assert(_pre_val->is_register(), "should be a register");
aoqi@0:   }
aoqi@0: 
aoqi@0:   LIR_Opr addr() const { return _addr; }
aoqi@0:   LIR_Opr pre_val() const { return _pre_val; }
aoqi@0:   LIR_PatchCode patch_code() const { return _patch_code; }
aoqi@0:   CodeEmitInfo* info() const { return _info; }
aoqi@0:   bool do_load() const { return _do_load; }
aoqi@0: 
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     if (_do_load) {
aoqi@0:       // don't pass in the code emit info since it's processed in the fast
aoqi@0:       // path
aoqi@0:       if (_info != NULL)
aoqi@0:         visitor->do_slow_case(_info);
aoqi@0:       else
aoqi@0:         visitor->do_slow_case();
aoqi@0: 
aoqi@0:       visitor->do_input(_addr);
aoqi@0:       visitor->do_temp(_pre_val);
aoqi@0:     } else {
aoqi@0:       visitor->do_slow_case();
aoqi@0:       visitor->do_input(_pre_val);
aoqi@0:     }
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("G1PreBarrierStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: class G1PostBarrierStub: public CodeStub {
aoqi@0:  private:
aoqi@0:   LIR_Opr _addr;
aoqi@0:   LIR_Opr _new_val;
aoqi@0: 
aoqi@0:   static jbyte* _byte_map_base;
aoqi@0:   static jbyte* byte_map_base_slow();
aoqi@0:   static jbyte* byte_map_base() {
aoqi@0:     if (_byte_map_base == NULL) {
aoqi@0:       _byte_map_base = byte_map_base_slow();
aoqi@0:     }
aoqi@0:     return _byte_map_base;
aoqi@0:   }
aoqi@0: 
aoqi@0:  public:
aoqi@0:   // addr (the address of the object head) and new_val must be registers.
aoqi@0:   G1PostBarrierStub(LIR_Opr addr, LIR_Opr new_val): _addr(addr), _new_val(new_val) { }
aoqi@0: 
aoqi@0:   LIR_Opr addr() const { return _addr; }
aoqi@0:   LIR_Opr new_val() const { return _new_val; }
aoqi@0: 
aoqi@0:   virtual void emit_code(LIR_Assembler* e);
aoqi@0:   virtual void visit(LIR_OpVisitState* visitor) {
aoqi@0:     // don't pass in the code emit info since it's processed in the fast path
aoqi@0:     visitor->do_slow_case();
aoqi@0:     visitor->do_input(_addr);
aoqi@0:     visitor->do_input(_new_val);
aoqi@0:   }
aoqi@0: #ifndef PRODUCT
aoqi@0:   virtual void print_name(outputStream* out) const { out->print("G1PostBarrierStub"); }
aoqi@0: #endif // PRODUCT
aoqi@0: };
aoqi@0: 
aoqi@0: #endif // INCLUDE_ALL_GCS
aoqi@0: //////////////////////////////////////////////////////////////////////////////////////////
aoqi@0: 
aoqi@0: #endif // SHARE_VM_C1_C1_CODESTUBS_HPP