1 /*

     2  * Copyright 1998-2005 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    24 

    25 #include "incls/_precompiled.incl"

    26 #include "incls/_interpreterRT_x86_32.cpp.incl"

    27 

    28 

    29 #define __ _masm->

    30 

    31 

    32 // Implementation of SignatureHandlerGenerator

    33 void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {

    34   move(offset(), jni_offset() + 1);

    35 }

    36 

    37 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {

    38    move(offset(), jni_offset() + 2);

    39    move(offset() + 1, jni_offset() + 1);

    40 }

    41 

    42 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {

    43   box (offset(), jni_offset() + 1);

    44 }

    45 

    46 void InterpreterRuntime::SignatureHandlerGenerator::move(int from_offset, int to_offset) {

    47   __ movl(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));

    48   __ movl(Address(to(), to_offset * wordSize), temp());

    49 }

    50 

    51 

    52 void InterpreterRuntime::SignatureHandlerGenerator::box(int from_offset, int to_offset) {

    53   __ leal(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));

    54   __ cmpl(Address(from(), Interpreter::local_offset_in_bytes(from_offset)), 0); // do not use temp() to avoid AGI

    55   Label L;

    56   __ jcc(Assembler::notZero, L);

    57   __ movl(temp(), 0);

    58   __ bind(L);

    59   __ movl(Address(to(), to_offset * wordSize), temp());

    60 }

    61 

    62 

    63 void InterpreterRuntime::SignatureHandlerGenerator::generate( uint64_t fingerprint) {

    64   // generate code to handle arguments

    65   iterate(fingerprint);

    66   // return result handler

    67   __ lea(rax,

    68          ExternalAddress((address)Interpreter::result_handler(method()->result_type())));

    69   // return

    70   __ ret(0);

    71   __ flush();

    72 }

    73 

    74 

    75 Register InterpreterRuntime::SignatureHandlerGenerator::from()       { return rdi; }

    76 Register InterpreterRuntime::SignatureHandlerGenerator::to()         { return rsp; }

    77 Register InterpreterRuntime::SignatureHandlerGenerator::temp()       { return rcx; }

    78 

    79 

    80 // Implementation of SignatureHandlerLibrary

    81 

    82 void SignatureHandlerLibrary::pd_set_handler(address handler) {}

    83 

    84 class SlowSignatureHandler: public NativeSignatureIterator {

    85  private:

    86   address   _from;

    87   intptr_t* _to;

    88 

    89 #ifdef ASSERT

    90   void verify_tag(frame::Tag t) {

    91     assert(!TaggedStackInterpreter ||

    92            *(intptr_t*)(_from+Interpreter::local_tag_offset_in_bytes(0)) == t, "wrong tag");

    93   }

    94 #endif // ASSERT

    95 

    96   virtual void pass_int() {

    97     *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));

    98     debug_only(verify_tag(frame::TagValue));

    99     _from -= Interpreter::stackElementSize();

   100   }

   101 

   102   virtual void pass_long() {

   103     _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));

   104     _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));

   105     debug_only(verify_tag(frame::TagValue));

   106     _to += 2;

   107     _from -= 2*Interpreter::stackElementSize();

   108   }

   109 

   110   virtual void pass_object() {

   111     // pass address of from

   112     intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));

   113     *_to++ = (*(intptr_t*)from_addr == 0) ? NULL : from_addr;

   114     debug_only(verify_tag(frame::TagReference));

   115     _from -= Interpreter::stackElementSize();

   116    }

   117 

   118  public:

   119   SlowSignatureHandler(methodHandle method, address from, intptr_t* to) :

   120     NativeSignatureIterator(method) {

   121     _from = from;

   122     _to   = to + (is_static() ? 2 : 1);

   123   }

   124 };

   125 

   126 IRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(JavaThread* thread, methodOopDesc* method, intptr_t* from, intptr_t* to))

   127   methodHandle m(thread, (methodOop)method);

   128   assert(m->is_native(), "sanity check");

   129   // handle arguments

   130   SlowSignatureHandler(m, (address)from, to + 1).iterate(UCONST64(-1));

   131   // return result handler

   132   return Interpreter::result_handler(m->result_type());

   133 IRT_END