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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
|
// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#if V8_TARGET_ARCH_X64
#include "src/interface-descriptors.h"
namespace v8 {
namespace internal {
const Register CallInterfaceDescriptor::ContextRegister() { return rsi; }
void CallInterfaceDescriptor::DefaultInitializePlatformSpecific(
CallInterfaceDescriptorData* data, int register_parameter_count) {
const Register default_stub_registers[] = {rax, rbx, rcx, rdx, rdi};
CHECK_LE(static_cast<size_t>(register_parameter_count),
arraysize(default_stub_registers));
data->InitializePlatformSpecific(register_parameter_count,
default_stub_registers);
}
void RecordWriteDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
const Register default_stub_registers[] = {arg_reg_1, arg_reg_2, arg_reg_3,
arg_reg_4, kReturnRegister0};
data->RestrictAllocatableRegisters(default_stub_registers,
arraysize(default_stub_registers));
CHECK_LE(static_cast<size_t>(kParameterCount),
arraysize(default_stub_registers));
data->InitializePlatformSpecific(kParameterCount, default_stub_registers);
}
const Register FastNewFunctionContextDescriptor::ScopeInfoRegister() {
return rdi;
}
const Register FastNewFunctionContextDescriptor::SlotsRegister() { return rax; }
const Register LoadDescriptor::ReceiverRegister() { return rdx; }
const Register LoadDescriptor::NameRegister() { return rcx; }
const Register LoadDescriptor::SlotRegister() { return rax; }
const Register LoadWithVectorDescriptor::VectorRegister() { return rbx; }
const Register StoreDescriptor::ReceiverRegister() { return rdx; }
const Register StoreDescriptor::NameRegister() { return rcx; }
const Register StoreDescriptor::ValueRegister() { return rax; }
const Register StoreDescriptor::SlotRegister() { return rdi; }
const Register StoreWithVectorDescriptor::VectorRegister() { return rbx; }
const Register StoreTransitionDescriptor::SlotRegister() { return rdi; }
const Register StoreTransitionDescriptor::VectorRegister() { return rbx; }
const Register StoreTransitionDescriptor::MapRegister() { return r11; }
const Register ApiGetterDescriptor::HolderRegister() { return rcx; }
const Register ApiGetterDescriptor::CallbackRegister() { return rbx; }
const Register GrowArrayElementsDescriptor::ObjectRegister() { return rax; }
const Register GrowArrayElementsDescriptor::KeyRegister() { return rbx; }
void TypeofDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
Register registers[] = {rbx};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
// static
const Register TypeConversionDescriptor::ArgumentRegister() { return rax; }
void CallFunctionDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
Register registers[] = {rdi};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void CallTrampolineDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
// rax : number of arguments
// rdi : the target to call
Register registers[] = {rdi, rax};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void CallVarargsDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
// rax : number of arguments (on the stack, not including receiver)
// rdi : the target to call
// rbx : arguments list (FixedArray)
// rcx : arguments list length (untagged)
Register registers[] = {rdi, rax, rbx, rcx};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void CallForwardVarargsDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
// rax : number of arguments
// rcx : start index (to support rest parameters)
// rdi : the target to call
Register registers[] = {rdi, rax, rcx};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void CallWithSpreadDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
// rax : number of arguments (on the stack, not including receiver)
// rdi : the target to call
// rbx : the object to spread
Register registers[] = {rdi, rax, rbx};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void CallWithArrayLikeDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
// rdi : the target to call
// rbx : the arguments list
Register registers[] = {rdi, rbx};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void ConstructVarargsDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
// rax : number of arguments (on the stack, not including receiver)
// rdi : the target to call
// rdx : the new target
// rbx : arguments list (FixedArray)
// rcx : arguments list length (untagged)
Register registers[] = {rdi, rdx, rax, rbx, rcx};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void ConstructForwardVarargsDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
// rax : number of arguments
// rdx : the new target
// rcx : start index (to support rest parameters)
// rdi : the target to call
Register registers[] = {rdi, rdx, rax, rcx};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void ConstructWithSpreadDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
// rax : number of arguments (on the stack, not including receiver)
// rdi : the target to call
// rdx : the new target
// rbx : the object to spread
Register registers[] = {rdi, rdx, rax, rbx};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void ConstructWithArrayLikeDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
// rdi : the target to call
// rdx : the new target
// rbx : the arguments list
Register registers[] = {rdi, rdx, rbx};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void ConstructStubDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
// rax : number of arguments
// rdx : the new target
// rdi : the target to call
// rbx : allocation site or undefined
Register registers[] = {rdi, rdx, rax, rbx};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void AbortDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
Register registers[] = {rdx};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void AllocateHeapNumberDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
data->InitializePlatformSpecific(0, nullptr);
}
void CompareDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
Register registers[] = {rdx, rax};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void BinaryOpDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
Register registers[] = {rdx, rax};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void ArgumentAdaptorDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
Register registers[] = {
rdi, // JSFunction
rdx, // the new target
rax, // actual number of arguments
rbx, // expected number of arguments
};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void ApiCallbackDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
Register registers[] = {
JavaScriptFrame::context_register(), // callee context
rbx, // call_data
rcx, // holder
rdx, // api_function_address
};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void InterpreterDispatchDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
Register registers[] = {
kInterpreterAccumulatorRegister, kInterpreterBytecodeOffsetRegister,
kInterpreterBytecodeArrayRegister, kInterpreterDispatchTableRegister};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void InterpreterPushArgsThenCallDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
Register registers[] = {
rax, // argument count (not including receiver)
rbx, // address of first argument
rdi // the target callable to be call
};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void InterpreterPushArgsThenConstructDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
Register registers[] = {
rax, // argument count (not including receiver)
rdx, // new target
rdi, // constructor
rbx, // allocation site feedback if available, undefined otherwise
rcx, // address of first argument
};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void ResumeGeneratorDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
Register registers[] = {
rax, // the value to pass to the generator
rdx // the JSGeneratorObject / JSAsyncGeneratorObject to resume
};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
void FrameDropperTrampolineDescriptor::InitializePlatformSpecific(
CallInterfaceDescriptorData* data) {
Register registers[] = {
rbx, // loaded new FP
};
data->InitializePlatformSpecific(arraysize(registers), registers);
}
} // namespace internal
} // namespace v8
#endif // V8_TARGET_ARCH_X64
|