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
|
// Copyright 2016 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_INTERPRETER_BYTECODE_OPERANDS_H_
#define V8_INTERPRETER_BYTECODE_OPERANDS_H_
#include "src/common/globals.h"
#include "src/utils/utils.h"
namespace v8 {
namespace internal {
namespace interpreter {
#define INVALID_OPERAND_TYPE_LIST(V) V(None, OperandTypeInfo::kNone)
#define REGISTER_INPUT_OPERAND_TYPE_LIST(V) \
V(Reg, OperandTypeInfo::kScalableSignedByte) \
V(RegList, OperandTypeInfo::kScalableSignedByte) \
V(RegPair, OperandTypeInfo::kScalableSignedByte)
#define REGISTER_OUTPUT_OPERAND_TYPE_LIST(V) \
V(RegOut, OperandTypeInfo::kScalableSignedByte) \
V(RegOutList, OperandTypeInfo::kScalableSignedByte) \
V(RegOutPair, OperandTypeInfo::kScalableSignedByte) \
V(RegOutTriple, OperandTypeInfo::kScalableSignedByte)
#define SIGNED_SCALABLE_SCALAR_OPERAND_TYPE_LIST(V) \
V(Imm, OperandTypeInfo::kScalableSignedByte)
#define UNSIGNED_SCALABLE_SCALAR_OPERAND_TYPE_LIST(V) \
V(Idx, OperandTypeInfo::kScalableUnsignedByte) \
V(UImm, OperandTypeInfo::kScalableUnsignedByte) \
V(RegCount, OperandTypeInfo::kScalableUnsignedByte)
#define UNSIGNED_FIXED_SCALAR_OPERAND_TYPE_LIST(V) \
V(Flag8, OperandTypeInfo::kFixedUnsignedByte) \
V(IntrinsicId, OperandTypeInfo::kFixedUnsignedByte) \
V(RuntimeId, OperandTypeInfo::kFixedUnsignedShort) \
V(NativeContextIndex, OperandTypeInfo::kScalableUnsignedByte)
// Carefully ordered for operand type range checks below.
#define NON_REGISTER_OPERAND_TYPE_LIST(V) \
INVALID_OPERAND_TYPE_LIST(V) \
UNSIGNED_FIXED_SCALAR_OPERAND_TYPE_LIST(V) \
UNSIGNED_SCALABLE_SCALAR_OPERAND_TYPE_LIST(V) \
SIGNED_SCALABLE_SCALAR_OPERAND_TYPE_LIST(V)
// Carefully ordered for operand type range checks below.
#define REGISTER_OPERAND_TYPE_LIST(V) \
REGISTER_INPUT_OPERAND_TYPE_LIST(V) \
REGISTER_OUTPUT_OPERAND_TYPE_LIST(V)
// The list of operand types used by bytecodes.
// Carefully ordered for operand type range checks below.
#define OPERAND_TYPE_LIST(V) \
NON_REGISTER_OPERAND_TYPE_LIST(V) \
REGISTER_OPERAND_TYPE_LIST(V)
// Enumeration of scaling factors applicable to scalable operands. Code
// relies on being able to cast values to integer scaling values.
#define OPERAND_SCALE_LIST(V) \
V(Single, 1) \
V(Double, 2) \
V(Quadruple, 4)
enum class OperandScale : uint8_t {
#define DECLARE_OPERAND_SCALE(Name, Scale) k##Name = Scale,
OPERAND_SCALE_LIST(DECLARE_OPERAND_SCALE)
#undef DECLARE_OPERAND_SCALE
kLast = kQuadruple
};
// Enumeration of the size classes of operand types used by
// bytecodes. Code relies on being able to cast values to integer
// types to get the size in bytes.
enum class OperandSize : uint8_t {
kNone = 0,
kByte = 1,
kShort = 2,
kQuad = 4,
kLast = kQuad
};
// Primitive operand info used that summarize properties of operands.
// Columns are Name, IsScalable, IsUnsigned, UnscaledSize.
#define OPERAND_TYPE_INFO_LIST(V) \
V(None, false, false, OperandSize::kNone) \
V(ScalableSignedByte, true, false, OperandSize::kByte) \
V(ScalableUnsignedByte, true, true, OperandSize::kByte) \
V(FixedUnsignedByte, false, true, OperandSize::kByte) \
V(FixedUnsignedShort, false, true, OperandSize::kShort)
enum class OperandTypeInfo : uint8_t {
#define DECLARE_OPERAND_TYPE_INFO(Name, ...) k##Name,
OPERAND_TYPE_INFO_LIST(DECLARE_OPERAND_TYPE_INFO)
#undef DECLARE_OPERAND_TYPE_INFO
};
// Enumeration of operand types used by bytecodes.
enum class OperandType : uint8_t {
#define DECLARE_OPERAND_TYPE(Name, _) k##Name,
OPERAND_TYPE_LIST(DECLARE_OPERAND_TYPE)
#undef DECLARE_OPERAND_TYPE
#define COUNT_OPERAND_TYPES(x, _) +1
// The COUNT_OPERAND macro will turn this into kLast = -1 +1 +1... which will
// evaluate to the same value as the last operand.
kLast = -1 OPERAND_TYPE_LIST(COUNT_OPERAND_TYPES)
#undef COUNT_OPERAND_TYPES
};
enum class AccumulatorUse : uint8_t {
kNone = 0,
kRead = 1 << 0,
kWrite = 1 << 1,
kReadWrite = kRead | kWrite
};
constexpr inline AccumulatorUse operator&(AccumulatorUse lhs,
AccumulatorUse rhs) {
return static_cast<AccumulatorUse>(static_cast<int>(lhs) &
static_cast<int>(rhs));
}
constexpr inline AccumulatorUse operator|(AccumulatorUse lhs,
AccumulatorUse rhs) {
return static_cast<AccumulatorUse>(static_cast<int>(lhs) |
static_cast<int>(rhs));
}
V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
const AccumulatorUse& use);
V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
const OperandScale& operand_scale);
V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
const OperandSize& operand_size);
V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
const OperandType& operand_type);
class BytecodeOperands : public AllStatic {
public:
// The total number of bytecode operand types used.
static const int kOperandTypeCount = static_cast<int>(OperandType::kLast) + 1;
// The total number of bytecode operand scales used.
#define OPERAND_SCALE_COUNT(...) +1
static const int kOperandScaleCount =
0 OPERAND_SCALE_LIST(OPERAND_SCALE_COUNT);
#undef OPERAND_SCALE_COUNT
static constexpr int OperandScaleAsIndex(OperandScale operand_scale) {
#ifdef V8_CAN_HAVE_DCHECK_IN_CONSTEXPR
#ifdef DEBUG
int result = static_cast<int>(operand_scale) >> 1;
switch (operand_scale) {
case OperandScale::kSingle:
DCHECK_EQ(0, result);
break;
case OperandScale::kDouble:
DCHECK_EQ(1, result);
break;
case OperandScale::kQuadruple:
DCHECK_EQ(2, result);
break;
default:
UNREACHABLE();
}
#endif
#endif
return static_cast<int>(operand_scale) >> 1;
}
// Returns true if |accumulator_use| reads the accumulator.
static constexpr bool ReadsAccumulator(AccumulatorUse accumulator_use) {
return (accumulator_use & AccumulatorUse::kRead) == AccumulatorUse::kRead;
}
// Returns true if |accumulator_use| writes the accumulator.
static constexpr bool WritesAccumulator(AccumulatorUse accumulator_use) {
return (accumulator_use & AccumulatorUse::kWrite) == AccumulatorUse::kWrite;
}
// Returns true if |operand_type| is a scalable signed byte.
static constexpr bool IsScalableSignedByte(OperandType operand_type) {
return IsInRange(operand_type, OperandType::kImm,
OperandType::kRegOutTriple);
}
// Returns true if |operand_type| is a scalable unsigned byte.
static constexpr bool IsScalableUnsignedByte(OperandType operand_type) {
return IsInRange(operand_type, OperandType::kIdx, OperandType::kRegCount);
}
};
} // namespace interpreter
} // namespace internal
} // namespace v8
#endif // V8_INTERPRETER_BYTECODE_OPERANDS_H_
|
