interpreterRT_x86_32.cpp revision 1472:c18cbe5936b8 
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
33void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
34  move(offset(), jni_offset() + 1);
35}
36
37void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
38   move(offset(), jni_offset() + 2);
39   move(offset() + 1, jni_offset() + 1);
40}
41
42void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
43  box (offset(), jni_offset() + 1);
44}
45
46void 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
52void InterpreterRuntime::SignatureHandlerGenerator::box(int from_offset, int to_offset) {
53  __ lea(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
54  __ cmpptr(Address(from(), Interpreter::local_offset_in_bytes(from_offset)), (int32_t)NULL_WORD); // do not use temp() to avoid AGI
55  Label L;
56  __ jcc(Assembler::notZero, L);
57  __ movptr(temp(), NULL_WORD);
58  __ bind(L);
59  __ movptr(Address(to(), to_offset * wordSize), temp());
60}
61
62
63void 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
75Register InterpreterRuntime::SignatureHandlerGenerator::from()       { return rdi; }
76Register InterpreterRuntime::SignatureHandlerGenerator::to()         { return rsp; }
77Register InterpreterRuntime::SignatureHandlerGenerator::temp()       { return rcx; }
78
79
80// Implementation of SignatureHandlerLibrary
81
82void SignatureHandlerLibrary::pd_set_handler(address handler) {}
83
84class SlowSignatureHandler: public NativeSignatureIterator {
85 private:
86  address   _from;
87  intptr_t* _to;
88
89  virtual void pass_int() {
90    *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
91    _from -= Interpreter::stackElementSize;
92  }
93
94  virtual void pass_long() {
95    _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
96    _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
97    _to += 2;
98    _from -= 2*Interpreter::stackElementSize;
99  }
100
101  virtual void pass_object() {
102    // pass address of from
103    intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));
104    *_to++ = (*(intptr_t*)from_addr == 0) ? NULL_WORD : from_addr;
105    _from -= Interpreter::stackElementSize;
106   }
107
108 public:
109  SlowSignatureHandler(methodHandle method, address from, intptr_t* to) :
110    NativeSignatureIterator(method) {
111    _from = from;
112    _to   = to + (is_static() ? 2 : 1);
113  }
114};
115
116IRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(JavaThread* thread, methodOopDesc* method, intptr_t* from, intptr_t* to))
117  methodHandle m(thread, (methodOop)method);
118  assert(m->is_native(), "sanity check");
119  // handle arguments
120  SlowSignatureHandler(m, (address)from, to + 1).iterate(UCONST64(-1));
121  // return result handler
122  return Interpreter::result_handler(m->result_type());
123IRT_END
124