1 /*
   2  * Copyright (c) 1998, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * 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_float() {
  38   move(offset(), jni_offset() + 1);
  39 }
  40 
  41 void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
  42    move(offset(), jni_offset() + 2);
  43    move(offset() + 1, jni_offset() + 1);
  44 }
  45 
  46 void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
  47   box (offset(), jni_offset() + 1);
  48 }
  49 
  50 void InterpreterRuntime::SignatureHandlerGenerator::move(int from_offset, int to_offset) {
  51   __ movl(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
  52   __ movl(Address(to(), to_offset * wordSize), temp());
  53 }
  54 
  55 
  56 void InterpreterRuntime::SignatureHandlerGenerator::box(int from_offset, int to_offset) {
  57   __ lea(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
  58   __ cmpptr(Address(from(), Interpreter::local_offset_in_bytes(from_offset)), (int32_t)NULL_WORD); // do not use temp() to avoid AGI
  59   Label L;
  60   __ jcc(Assembler::notZero, L);
  61   __ movptr(temp(), NULL_WORD);
  62   __ bind(L);
  63   __ movptr(Address(to(), to_offset * wordSize), temp());
  64 }
  65 
  66 
  67 void InterpreterRuntime::SignatureHandlerGenerator::generate( uint64_t fingerprint) {
  68   // generate code to handle arguments
  69   iterate(fingerprint);
  70   // return result handler
  71   __ lea(rax,
  72          ExternalAddress((address)Interpreter::result_handler(method()->result_type())));
  73   // return
  74   __ ret(0);
  75   __ flush();
  76 }
  77 
  78 
  79 Register InterpreterRuntime::SignatureHandlerGenerator::from()       { return rdi; }
  80 Register InterpreterRuntime::SignatureHandlerGenerator::to()         { return rsp; }
  81 Register InterpreterRuntime::SignatureHandlerGenerator::temp()       { return rcx; }
  82 
  83 
  84 // Implementation of SignatureHandlerLibrary
  85 
  86 void SignatureHandlerLibrary::pd_set_handler(address handler) {}
  87 
  88 class SlowSignatureHandler: public NativeSignatureIterator {
  89  private:
  90   address   _from;
  91   intptr_t* _to;
  92 
  93   virtual void pass_int() {
  94     *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
  95     _from -= Interpreter::stackElementSize;
  96   }
  97 
  98   virtual void pass_float() {
  99     *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
 100     _from -= Interpreter::stackElementSize;
 101   }
 102 
 103   virtual void pass_long() {
 104     _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
 105     _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
 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_WORD : from_addr;
 114     _from -= Interpreter::stackElementSize;
 115    }
 116 
 117  public:
 118   SlowSignatureHandler(methodHandle method, address from, intptr_t* to) :
 119     NativeSignatureIterator(method) {
 120     _from = from;
 121     _to   = to + (is_static() ? 2 : 1);
 122   }
 123 };
 124 
 125 IRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(JavaThread* thread, methodOopDesc* method, intptr_t* from, intptr_t* to))
 126   methodHandle m(thread, (methodOop)method);
 127   assert(m->is_native(), "sanity check");
 128   // handle arguments
 129   SlowSignatureHandler(m, (address)from, to + 1).iterate(UCONST64(-1));
 130   // return result handler
 131   return Interpreter::result_handler(m->result_type());
 132 IRT_END