interpreterRT_x86_32.cpp revision 1879:f95d63e2154a 
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 "precompiled.hpp"
26#include "interpreter/interpreter.hpp"
27#include "interpreter/interpreterRuntime.hpp"
28#include "memory/allocation.inline.hpp"
29#include "memory/universe.inline.hpp"
30#include "oops/methodOop.hpp"
31#include "oops/oop.inline.hpp"
32#include "runtime/handles.inline.hpp"
33#include "runtime/icache.hpp"
34#include "runtime/interfaceSupport.hpp"
35#include "runtime/signature.hpp"
36
37
38#define __ _masm->
39
40
41// Implementation of SignatureHandlerGenerator
42void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
43  move(offset(), jni_offset() + 1);
44}
45
46void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
47  move(offset(), jni_offset() + 1);
48}
49
50void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
51   move(offset(), jni_offset() + 2);
52   move(offset() + 1, jni_offset() + 1);
53}
54
55void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
56  box (offset(), jni_offset() + 1);
57}
58
59void InterpreterRuntime::SignatureHandlerGenerator::move(int from_offset, int to_offset) {
60  __ movl(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
61  __ movl(Address(to(), to_offset * wordSize), temp());
62}
63
64
65void InterpreterRuntime::SignatureHandlerGenerator::box(int from_offset, int to_offset) {
66  __ lea(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
67  __ cmpptr(Address(from(), Interpreter::local_offset_in_bytes(from_offset)), (int32_t)NULL_WORD); // do not use temp() to avoid AGI
68  Label L;
69  __ jcc(Assembler::notZero, L);
70  __ movptr(temp(), NULL_WORD);
71  __ bind(L);
72  __ movptr(Address(to(), to_offset * wordSize), temp());
73}
74
75
76void InterpreterRuntime::SignatureHandlerGenerator::generate( uint64_t fingerprint) {
77  // generate code to handle arguments
78  iterate(fingerprint);
79  // return result handler
80  __ lea(rax,
81         ExternalAddress((address)Interpreter::result_handler(method()->result_type())));
82  // return
83  __ ret(0);
84  __ flush();
85}
86
87
88Register InterpreterRuntime::SignatureHandlerGenerator::from()       { return rdi; }
89Register InterpreterRuntime::SignatureHandlerGenerator::to()         { return rsp; }
90Register InterpreterRuntime::SignatureHandlerGenerator::temp()       { return rcx; }
91
92
93// Implementation of SignatureHandlerLibrary
94
95void SignatureHandlerLibrary::pd_set_handler(address handler) {}
96
97class SlowSignatureHandler: public NativeSignatureIterator {
98 private:
99  address   _from;
100  intptr_t* _to;
101
102  virtual void pass_int() {
103    *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
104    _from -= Interpreter::stackElementSize;
105  }
106
107  virtual void pass_float() {
108    *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
109    _from -= Interpreter::stackElementSize;
110  }
111
112  virtual void pass_long() {
113    _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
114    _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
115    _to += 2;
116    _from -= 2*Interpreter::stackElementSize;
117  }
118
119  virtual void pass_object() {
120    // pass address of from
121    intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));
122    *_to++ = (*(intptr_t*)from_addr == 0) ? NULL_WORD : from_addr;
123    _from -= Interpreter::stackElementSize;
124   }
125
126 public:
127  SlowSignatureHandler(methodHandle method, address from, intptr_t* to) :
128    NativeSignatureIterator(method) {
129    _from = from;
130    _to   = to + (is_static() ? 2 : 1);
131  }
132};
133
134IRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(JavaThread* thread, methodOopDesc* method, intptr_t* from, intptr_t* to))
135  methodHandle m(thread, (methodOop)method);
136  assert(m->is_native(), "sanity check");
137  // handle arguments
138  SlowSignatureHandler(m, (address)from, to + 1).iterate(UCONST64(-1));
139  // return result handler
140  return Interpreter::result_handler(m->result_type());
141IRT_END
142