1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* Copyright (C) 2010, 2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "BytecodeConventions.h"
#include "CCallHelpers.h"
#include "FPRInfo.h"
#include "GPRInfo.h"
#include "JSCJSValue.h"
#include "JSString.h"
#include "MacroAssembler.h"
#if ENABLE(JIT)
namespace JSC {
class JSInterfaceJIT : public CCallHelpers, public GPRInfo, public FPRInfo {
public:
JSInterfaceJIT(VM* vm = nullptr, CodeBlock* codeBlock = nullptr)
: CCallHelpers(codeBlock)
, m_vm(vm)
{
}
inline Jump emitLoadJSCell(VirtualRegister, RegisterID payload);
inline Jump emitLoadInt32(VirtualRegister, RegisterID dst);
inline Jump emitLoadDouble(VirtualRegister, FPRegisterID dst, RegisterID scratch);
#if USE(JSVALUE32_64)
inline Jump emitJumpIfNotJSCell(VirtualRegister);
#endif
void emitGetFromCallFrameHeaderPtr(VirtualRegister entry, RegisterID to, RegisterID from = callFrameRegister);
void emitPutToCallFrameHeader(RegisterID from, VirtualRegister entry);
void emitPutToCallFrameHeader(void* value, VirtualRegister entry);
void emitPutCellToCallFrameHeader(RegisterID from, VirtualRegister entry);
VM* vm() const { return m_vm; }
VM* m_vm;
};
#if USE(JSVALUE32_64)
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadJSCell(VirtualRegister virtualRegister, RegisterID payload)
{
loadPtr(payloadFor(virtualRegister), payload);
return emitJumpIfNotJSCell(virtualRegister);
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitJumpIfNotJSCell(VirtualRegister virtualRegister)
{
ASSERT(virtualRegister < VirtualRegister(FirstConstantRegisterIndex));
return branch32(NotEqual, tagFor(virtualRegister), TrustedImm32(JSValue::CellTag));
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadInt32(VirtualRegister virtualRegister, RegisterID dst)
{
ASSERT(virtualRegister < VirtualRegister(FirstConstantRegisterIndex));
loadPtr(payloadFor(virtualRegister), dst);
return branch32(NotEqual, tagFor(virtualRegister), TrustedImm32(JSValue::Int32Tag));
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadDouble(VirtualRegister virtualRegister, FPRegisterID dst, RegisterID scratch)
{
ASSERT(virtualRegister < VirtualRegister(FirstConstantRegisterIndex));
loadPtr(tagFor(virtualRegister), scratch);
Jump isDouble = branch32(Below, scratch, TrustedImm32(JSValue::LowestTag));
Jump notInt = branch32(NotEqual, scratch, TrustedImm32(JSValue::Int32Tag));
loadPtr(payloadFor(virtualRegister), scratch);
convertInt32ToDouble(scratch, dst);
Jump done = jump();
isDouble.link(this);
loadDouble(addressFor(virtualRegister), dst);
done.link(this);
return notInt;
}
#endif
#if USE(JSVALUE64)
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadJSCell(VirtualRegister virtualRegister, RegisterID dst)
{
load64(addressFor(virtualRegister), dst);
return branchIfNotCell(dst);
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadInt32(VirtualRegister virtualRegister, RegisterID dst)
{
load64(addressFor(virtualRegister), dst);
Jump notInt32 = branchIfNotInt32(dst);
zeroExtend32ToWord(dst, dst);
return notInt32;
}
inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadDouble(VirtualRegister virtualRegister, FPRegisterID dst, RegisterID scratch)
{
load64(addressFor(virtualRegister), scratch);
Jump notNumber = branchIfNotNumber(scratch);
Jump notInt = branchIfNotInt32(scratch);
convertInt32ToDouble(scratch, dst);
Jump done = jump();
notInt.link(this);
unboxDouble(scratch, scratch, dst);
done.link(this);
return notNumber;
}
#endif
ALWAYS_INLINE void JSInterfaceJIT::emitGetFromCallFrameHeaderPtr(VirtualRegister entry, RegisterID to, RegisterID from)
{
loadPtr(Address(from, entry.offset() * sizeof(Register)), to);
}
ALWAYS_INLINE void JSInterfaceJIT::emitPutToCallFrameHeader(RegisterID from, VirtualRegister entry)
{
#if USE(JSVALUE32_64)
storePtr(from, payloadFor(entry));
#else
store64(from, addressFor(entry));
#endif
}
ALWAYS_INLINE void JSInterfaceJIT::emitPutToCallFrameHeader(void* value, VirtualRegister entry)
{
storePtr(TrustedImmPtr(value), addressFor(entry));
}
ALWAYS_INLINE void JSInterfaceJIT::emitPutCellToCallFrameHeader(RegisterID from, VirtualRegister entry)
{
#if USE(JSVALUE32_64)
store32(TrustedImm32(JSValue::CellTag), tagFor(entry));
store32(from, payloadFor(entry));
#else
store64(from, addressFor(entry));
#endif
}
} // namespace JSC
#endif // ENABLE(JIT)
|
