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 /*

  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  *

  */

 // StubRoutines provides entry points to assembly routines used by

 // compiled code and the run-time system. Platform-specific entry

 // points are defined in the platform-specific inner class.

 //

 // Class scheme:

 //

 //    platform-independent               platform-dependent

 //

 //    stubRoutines.hpp  <-- included --  stubRoutines_<arch>.hpp

 //           ^                                  ^

 //           |                                  |

 //       implements                         implements

 //           |                                  |

 //           |                                  |

 //    stubRoutines.cpp                   stubRoutines_<arch>.cpp

 //    stubRoutines_<os_family>.cpp       stubGenerator_<arch>.cpp

 //    stubRoutines_<os_arch>.cpp

 //

 // Note 1: The important thing is a clean decoupling between stub

 //         entry points (interfacing to the whole vm; i.e., 1-to-n

 //         relationship) and stub generators (interfacing only to

 //         the entry points implementation; i.e., 1-to-1 relationship).

 //         This significantly simplifies changes in the generator

 //         structure since the rest of the vm is not affected.

 //

 // Note 2: stubGenerator_<arch>.cpp contains a minimal portion of

 //         machine-independent code; namely the generator calls of

 //         the generator functions that are used platform-independently.

 //         However, it comes with the advantage of having a 1-file

 //         implementation of the generator. It should be fairly easy

 //         to change, should it become a problem later.

 //

 // Scheme for adding a new entry point:

 //

 // 1. determine if it's a platform-dependent or independent entry point

 //    a) if platform independent: make subsequent changes in the independent files

 //    b) if platform   dependent: make subsequent changes in the   dependent files

 // 2. add a private instance variable holding the entry point address

 // 3. add a public accessor function to the instance variable

 // 4. implement the corresponding generator function in the platform-dependent

 //    stubGenerator_<arch>.cpp file and call the function in generate_all() of that file

 class StubRoutines: AllStatic {

  public:

   enum platform_independent_constants {

     max_size_of_parameters = 256                           // max. parameter size supported by megamorphic lookups

   };

   // Dependencies

   friend class StubGenerator;

   #include "incls/_stubRoutines_pd.hpp.incl"               // machine-specific parts

   static jint    _verify_oop_count;

   static address _verify_oop_subroutine_entry;

   static address _call_stub_return_address;                // the return PC, when returning to a call stub

   static address _call_stub_entry;

   static address _forward_exception_entry;

   static address _catch_exception_entry;

   static address _throw_AbstractMethodError_entry;

   static address _throw_IncompatibleClassChangeError_entry;

   static address _throw_ArithmeticException_entry;

   static address _throw_NullPointerException_entry;

   static address _throw_NullPointerException_at_call_entry;

   static address _throw_StackOverflowError_entry;

   static address _handler_for_unsafe_access_entry;

   static address _atomic_xchg_entry;

   static address _atomic_xchg_ptr_entry;

   static address _atomic_store_entry;

   static address _atomic_store_ptr_entry;

   static address _atomic_cmpxchg_entry;

   static address _atomic_cmpxchg_ptr_entry;

   static address _atomic_cmpxchg_long_entry;

   static address _atomic_add_entry;

   static address _atomic_add_ptr_entry;

   static address _fence_entry;

   static address _d2i_wrapper;

   static address _d2l_wrapper;

   static jint    _fpu_cntrl_wrd_std;

   static jint    _fpu_cntrl_wrd_24;

   static jint    _fpu_cntrl_wrd_64;

   static jint    _fpu_cntrl_wrd_trunc;

   static jint    _mxcsr_std;

   static jint    _fpu_subnormal_bias1[3];

   static jint    _fpu_subnormal_bias2[3];

   static BufferBlob* _code1;                               // code buffer for initial routines

   static BufferBlob* _code2;                               // code buffer for all other routines

   // Leaf routines which implement arraycopy and their addresses

   // arraycopy operands aligned on element type boundary

   static address _jbyte_arraycopy;

   static address _jshort_arraycopy;

   static address _jint_arraycopy;

   static address _jlong_arraycopy;

   static address _oop_arraycopy;

   static address _jbyte_disjoint_arraycopy;

   static address _jshort_disjoint_arraycopy;

   static address _jint_disjoint_arraycopy;

   static address _jlong_disjoint_arraycopy;

   static address _oop_disjoint_arraycopy;

   // arraycopy operands aligned on zero'th element boundary

   // These are identical to the ones aligned aligned on an

   // element type boundary, except that they assume that both

   // source and destination are HeapWord aligned.

   static address _arrayof_jbyte_arraycopy;

   static address _arrayof_jshort_arraycopy;

   static address _arrayof_jint_arraycopy;

   static address _arrayof_jlong_arraycopy;

   static address _arrayof_oop_arraycopy;

   static address _arrayof_jbyte_disjoint_arraycopy;

   static address _arrayof_jshort_disjoint_arraycopy;

   static address _arrayof_jint_disjoint_arraycopy;

   static address _arrayof_jlong_disjoint_arraycopy;

   static address _arrayof_oop_disjoint_arraycopy;

   // these are recommended but optional:

   static address _checkcast_arraycopy;

   static address _unsafe_arraycopy;

   static address _generic_arraycopy;

   // These are versions of the java.lang.Math methods which perform

   // the same operations as the intrinsic version.  They are used for

   // constant folding in the compiler to ensure equivalence.  If the

   // intrinsic version returns the same result as the strict version

   // then they can be set to the appropriate function from

   // SharedRuntime.

   static double (*_intrinsic_log)(double);

   static double (*_intrinsic_log10)(double);

   static double (*_intrinsic_exp)(double);

   static double (*_intrinsic_pow)(double, double);

   static double (*_intrinsic_sin)(double);

   static double (*_intrinsic_cos)(double);

   static double (*_intrinsic_tan)(double);

  public:

   // Initialization/Testing

   static void    initialize1();                            // must happen before universe::genesis

   static void    initialize2();                            // must happen after  universe::genesis

   static bool contains(address addr) {

     return

       (_code1 != NULL && _code1->blob_contains(addr)) ||

       (_code2 != NULL && _code2->blob_contains(addr)) ;

   }

   // Debugging

   static jint    verify_oop_count()                        { return _verify_oop_count; }

   static jint*   verify_oop_count_addr()                   { return &_verify_oop_count; }

   // a subroutine for debugging the GC

   static address verify_oop_subroutine_entry_address()    { return (address)&_verify_oop_subroutine_entry; }

   static address catch_exception_entry()                   { return _catch_exception_entry; }

   // Calls to Java

   typedef void (*CallStub)(

     address   link,

     intptr_t* result,

     BasicType result_type,

     methodOopDesc* method,

     address   entry_point,

     intptr_t* parameters,

     int       size_of_parameters,

     TRAPS

   );

   static CallStub call_stub()                              { return CAST_TO_FN_PTR(CallStub, _call_stub_entry); }

   // Exceptions

   static address forward_exception_entry()                 { return _forward_exception_entry; }

   // Implicit exceptions

   static address throw_AbstractMethodError_entry()         { return _throw_AbstractMethodError_entry; }

   static address throw_IncompatibleClassChangeError_entry(){ return _throw_IncompatibleClassChangeError_entry; }

   static address throw_ArithmeticException_entry()         { return _throw_ArithmeticException_entry; }

   static address throw_NullPointerException_entry()        { return _throw_NullPointerException_entry; }

   static address throw_NullPointerException_at_call_entry(){ return _throw_NullPointerException_at_call_entry; }

   static address throw_StackOverflowError_entry()          { return _throw_StackOverflowError_entry; }

   // Exceptions during unsafe access - should throw Java exception rather

   // than crash.

   static address handler_for_unsafe_access()               { return _handler_for_unsafe_access_entry; }

   static address atomic_xchg_entry()                       { return _atomic_xchg_entry; }

   static address atomic_xchg_ptr_entry()                   { return _atomic_xchg_ptr_entry; }

   static address atomic_store_entry()                      { return _atomic_store_entry; }

   static address atomic_store_ptr_entry()                  { return _atomic_store_ptr_entry; }

   static address atomic_cmpxchg_entry()                    { return _atomic_cmpxchg_entry; }

   static address atomic_cmpxchg_ptr_entry()                { return _atomic_cmpxchg_ptr_entry; }

   static address atomic_cmpxchg_long_entry()               { return _atomic_cmpxchg_long_entry; }

   static address atomic_add_entry()                        { return _atomic_add_entry; }

   static address atomic_add_ptr_entry()                    { return _atomic_add_ptr_entry; }

   static address fence_entry()                             { return _fence_entry; }

   static address d2i_wrapper()                             { return _d2i_wrapper; }

   static address d2l_wrapper()                             { return _d2l_wrapper; }

   static jint    fpu_cntrl_wrd_std()                       { return _fpu_cntrl_wrd_std;   }

   static address addr_fpu_cntrl_wrd_std()                  { return (address)&_fpu_cntrl_wrd_std;   }

   static address addr_fpu_cntrl_wrd_24()                   { return (address)&_fpu_cntrl_wrd_24;   }

   static address addr_fpu_cntrl_wrd_64()                   { return (address)&_fpu_cntrl_wrd_64;   }

   static address addr_fpu_cntrl_wrd_trunc()                { return (address)&_fpu_cntrl_wrd_trunc; }

   static address addr_mxcsr_std()                          { return (address)&_mxcsr_std; }

   static address addr_fpu_subnormal_bias1()                { return (address)&_fpu_subnormal_bias1; }

   static address addr_fpu_subnormal_bias2()                { return (address)&_fpu_subnormal_bias2; }

   static address jbyte_arraycopy()  { return _jbyte_arraycopy; }

   static address jshort_arraycopy() { return _jshort_arraycopy; }

   static address jint_arraycopy()   { return _jint_arraycopy; }

   static address jlong_arraycopy()  { return _jlong_arraycopy; }

   static address oop_arraycopy()    { return _oop_arraycopy; }

   static address jbyte_disjoint_arraycopy()  { return _jbyte_disjoint_arraycopy; }

   static address jshort_disjoint_arraycopy() { return _jshort_disjoint_arraycopy; }

   static address jint_disjoint_arraycopy()   { return _jint_disjoint_arraycopy; }

   static address jlong_disjoint_arraycopy()  { return _jlong_disjoint_arraycopy; }

   static address oop_disjoint_arraycopy()    { return _oop_disjoint_arraycopy; }

   static address arrayof_jbyte_arraycopy()  { return _arrayof_jbyte_arraycopy; }

   static address arrayof_jshort_arraycopy() { return _arrayof_jshort_arraycopy; }

   static address arrayof_jint_arraycopy()   { return _arrayof_jint_arraycopy; }

   static address arrayof_jlong_arraycopy()  { return _arrayof_jlong_arraycopy; }

   static address arrayof_oop_arraycopy()    { return _arrayof_oop_arraycopy; }

   static address arrayof_jbyte_disjoint_arraycopy()  { return _arrayof_jbyte_disjoint_arraycopy; }

   static address arrayof_jshort_disjoint_arraycopy() { return _arrayof_jshort_disjoint_arraycopy; }

   static address arrayof_jint_disjoint_arraycopy()   { return _arrayof_jint_disjoint_arraycopy; }

   static address arrayof_jlong_disjoint_arraycopy()  { return _arrayof_jlong_disjoint_arraycopy; }

   static address arrayof_oop_disjoint_arraycopy()    { return _arrayof_oop_disjoint_arraycopy; }

   static address checkcast_arraycopy()     { return _checkcast_arraycopy; }

   static address unsafe_arraycopy()        { return _unsafe_arraycopy; }

   static address generic_arraycopy()       { return _generic_arraycopy; }

   static double  intrinsic_log(double d) {

     assert(_intrinsic_log != NULL, "must be defined");

     return _intrinsic_log(d);

   }

   static double  intrinsic_log10(double d) {

     assert(_intrinsic_log != NULL, "must be defined");

     return _intrinsic_log10(d);

   }

   static double  intrinsic_exp(double d) {

     assert(_intrinsic_exp != NULL, "must be defined");

     return _intrinsic_exp(d);

   }

   static double  intrinsic_pow(double d, double d2) {

     assert(_intrinsic_pow != NULL, "must be defined");

     return _intrinsic_pow(d, d2);

   }

   static double  intrinsic_sin(double d) {

     assert(_intrinsic_sin != NULL, "must be defined");

     return _intrinsic_sin(d);

   }

   static double  intrinsic_cos(double d) {

     assert(_intrinsic_cos != NULL, "must be defined");

     return _intrinsic_cos(d);

   }

   static double  intrinsic_tan(double d) {

     assert(_intrinsic_tan != NULL, "must be defined");

     return _intrinsic_tan(d);

   }

   //

   // Default versions of the above arraycopy functions for platforms which do

   // not have specialized versions

   //

   static void jbyte_copy (jbyte*  src, jbyte*  dest, size_t count);

   static void jshort_copy(jshort* src, jshort* dest, size_t count);

   static void jint_copy  (jint*   src, jint*   dest, size_t count);

   static void jlong_copy (jlong*  src, jlong*  dest, size_t count);

   static void oop_copy   (oop*    src, oop*    dest, size_t count);

   static void arrayof_jbyte_copy (HeapWord* src, HeapWord* dest, size_t count);

   static void arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count);

   static void arrayof_jint_copy  (HeapWord* src, HeapWord* dest, size_t count);

   static void arrayof_jlong_copy (HeapWord* src, HeapWord* dest, size_t count);

   static void arrayof_oop_copy   (HeapWord* src, HeapWord* dest, size_t count);

 };