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
|
// Copyright 2018 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.
#ifndef V8_CODEGEN_IA32_REGISTER_IA32_H_
#define V8_CODEGEN_IA32_REGISTER_IA32_H_
#include "src/codegen/register.h"
#include "src/codegen/reglist.h"
namespace v8 {
namespace internal {
#define GENERAL_REGISTERS(V) \
V(eax) \
V(ecx) \
V(edx) \
V(ebx) \
V(esp) \
V(ebp) \
V(esi) \
V(edi)
#define ALLOCATABLE_GENERAL_REGISTERS(V) \
V(eax) \
V(ecx) \
V(edx) \
V(esi) \
V(edi)
#define DOUBLE_REGISTERS(V) \
V(xmm0) \
V(xmm1) \
V(xmm2) \
V(xmm3) \
V(xmm4) \
V(xmm5) \
V(xmm6) \
V(xmm7)
#define FLOAT_REGISTERS DOUBLE_REGISTERS
#define SIMD128_REGISTERS DOUBLE_REGISTERS
#define ALLOCATABLE_DOUBLE_REGISTERS(V) \
V(xmm1) \
V(xmm2) \
V(xmm3) \
V(xmm4) \
V(xmm5) \
V(xmm6) \
V(xmm7)
enum RegisterCode {
#define REGISTER_CODE(R) kRegCode_##R,
GENERAL_REGISTERS(REGISTER_CODE)
#undef REGISTER_CODE
kRegAfterLast
};
class Register : public RegisterBase<Register, kRegAfterLast> {
public:
bool is_byte_register() const { return code() <= 3; }
private:
friend class RegisterBase<Register, kRegAfterLast>;
explicit constexpr Register(int code) : RegisterBase(code) {}
};
ASSERT_TRIVIALLY_COPYABLE(Register);
static_assert(sizeof(Register) == sizeof(int),
"Register can efficiently be passed by value");
#define DEFINE_REGISTER(R) \
constexpr Register R = Register::from_code(kRegCode_##R);
GENERAL_REGISTERS(DEFINE_REGISTER)
#undef DEFINE_REGISTER
constexpr Register no_reg = Register::no_reg();
constexpr bool kPadArguments = false;
constexpr bool kSimpleFPAliasing = true;
constexpr bool kSimdMaskRegisters = false;
enum DoubleCode {
#define REGISTER_CODE(R) kDoubleCode_##R,
DOUBLE_REGISTERS(REGISTER_CODE)
#undef REGISTER_CODE
kDoubleAfterLast
};
class XMMRegister : public RegisterBase<XMMRegister, kDoubleAfterLast> {
friend class RegisterBase<XMMRegister, kDoubleAfterLast>;
explicit constexpr XMMRegister(int code) : RegisterBase(code) {}
};
using FloatRegister = XMMRegister;
using DoubleRegister = XMMRegister;
using Simd128Register = XMMRegister;
#define DEFINE_REGISTER(R) \
constexpr DoubleRegister R = DoubleRegister::from_code(kDoubleCode_##R);
DOUBLE_REGISTERS(DEFINE_REGISTER)
#undef DEFINE_REGISTER
constexpr DoubleRegister no_dreg = DoubleRegister::no_reg();
// Note that the bit values must match those used in actual instruction encoding
constexpr int kNumRegs = 8;
// Caller-saved registers
constexpr RegList kJSCallerSaved =
Register::ListOf(eax, ecx, edx,
ebx, // used as caller-saved register in JavaScript code
edi); // callee function
constexpr int kNumJSCallerSaved = 5;
// Number of registers for which space is reserved in safepoints.
constexpr int kNumSafepointRegisters = 8;
// Define {RegisterName} methods for the register types.
DEFINE_REGISTER_NAMES(Register, GENERAL_REGISTERS)
DEFINE_REGISTER_NAMES(XMMRegister, DOUBLE_REGISTERS)
// Give alias names to registers for calling conventions.
constexpr Register kReturnRegister0 = eax;
constexpr Register kReturnRegister1 = edx;
constexpr Register kReturnRegister2 = edi;
constexpr Register kJSFunctionRegister = edi;
constexpr Register kContextRegister = esi;
constexpr Register kAllocateSizeRegister = edx;
constexpr Register kInterpreterAccumulatorRegister = eax;
constexpr Register kInterpreterBytecodeOffsetRegister = edx;
constexpr Register kInterpreterBytecodeArrayRegister = edi;
constexpr Register kInterpreterDispatchTableRegister = esi;
constexpr Register kJavaScriptCallArgCountRegister = eax;
constexpr Register kJavaScriptCallCodeStartRegister = ecx;
constexpr Register kJavaScriptCallTargetRegister = kJSFunctionRegister;
constexpr Register kJavaScriptCallNewTargetRegister = edx;
// The ExtraArg1Register not part of the real JS calling convention and is
// mostly there to simplify consistent interface descriptor definitions across
// platforms. Note that on ia32 it aliases kJavaScriptCallCodeStartRegister.
constexpr Register kJavaScriptCallExtraArg1Register = ecx;
// The off-heap trampoline does not need a register on ia32 (it uses a
// pc-relative call instead).
constexpr Register kOffHeapTrampolineRegister = no_reg;
constexpr Register kRuntimeCallFunctionRegister = edx;
constexpr Register kRuntimeCallArgCountRegister = eax;
constexpr Register kRuntimeCallArgvRegister = ecx;
constexpr Register kWasmInstanceRegister = esi;
constexpr Register kWasmCompileLazyFuncIndexRegister = edi;
constexpr Register kRootRegister = ebx;
// TODO(860429): Remove remaining poisoning infrastructure on ia32.
constexpr Register kSpeculationPoisonRegister = no_reg;
} // namespace internal
} // namespace v8
#endif // V8_CODEGEN_IA32_REGISTER_IA32_H_
|