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
|
// Copyright 2017 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_ENABLE_WEBASSEMBLY
#error This header should only be included if WebAssembly is enabled.
#endif // !V8_ENABLE_WEBASSEMBLY
#ifndef V8_WASM_WASM_VALUE_H_
#define V8_WASM_WASM_VALUE_H_
#include "src/base/memory.h"
#include "src/handles/handles.h"
#include "src/utils/boxed-float.h"
#include "src/wasm/wasm-opcodes.h"
#include "src/zone/zone-containers.h"
namespace v8 {
namespace internal {
namespace wasm {
#define FOREACH_SIMD_TYPE(V) \
V(double, float2, f64x2, 2) \
V(float, float4, f32x4, 4) \
V(int64_t, int2, i64x2, 2) \
V(int32_t, int4, i32x4, 4) \
V(int16_t, int8, i16x8, 8) \
V(int8_t, int16, i8x16, 16)
#define DEFINE_SIMD_TYPE(cType, sType, name, kSize) \
struct sType { \
cType val[kSize]; \
};
FOREACH_SIMD_TYPE(DEFINE_SIMD_TYPE)
#undef DEFINE_SIMD_TYPE
class Simd128 {
public:
Simd128() = default;
#define DEFINE_SIMD_TYPE_SPECIFIC_METHODS(cType, sType, name, size) \
explicit Simd128(sType val) { \
base::WriteUnalignedValue<sType>(reinterpret_cast<Address>(val_), val); \
} \
sType to_##name() { \
return base::ReadUnalignedValue<sType>(reinterpret_cast<Address>(val_)); \
}
FOREACH_SIMD_TYPE(DEFINE_SIMD_TYPE_SPECIFIC_METHODS)
#undef DEFINE_SIMD_TYPE_SPECIFIC_METHODS
const uint8_t* bytes() { return val_; }
template <typename T>
inline T to();
private:
uint8_t val_[16] = {0};
};
#define DECLARE_CAST(cType, sType, name, size) \
template <> \
inline sType Simd128::to() { \
return to_##name(); \
}
FOREACH_SIMD_TYPE(DECLARE_CAST)
#undef DECLARE_CAST
// Macro for defining WasmValue methods for different types.
// Elements:
// - name (for to_<name>() method)
// - wasm type
// - c type
#define FOREACH_PRIMITIVE_WASMVAL_TYPE(V) \
V(i8, kWasmI8, int8_t) \
V(i16, kWasmI16, int16_t) \
V(i32, kWasmI32, int32_t) \
V(u32, kWasmI32, uint32_t) \
V(i64, kWasmI64, int64_t) \
V(u64, kWasmI64, uint64_t) \
V(f32, kWasmF32, float) \
V(f32_boxed, kWasmF32, Float32) \
V(f64, kWasmF64, double) \
V(f64_boxed, kWasmF64, Float64) \
V(s128, kWasmS128, Simd128)
ASSERT_TRIVIALLY_COPYABLE(Handle<Object>);
// A wasm value with type information.
class WasmValue {
public:
WasmValue() : type_(kWasmVoid), bit_pattern_{} {}
#define DEFINE_TYPE_SPECIFIC_METHODS(name, localtype, ctype) \
explicit WasmValue(ctype v) : type_(localtype), bit_pattern_{} { \
static_assert(sizeof(ctype) <= sizeof(bit_pattern_), \
"size too big for WasmValue"); \
base::WriteLittleEndianValue<ctype>( \
reinterpret_cast<Address>(bit_pattern_), v); \
} \
ctype to_##name() const { \
DCHECK_EQ(localtype, type_); \
return to_##name##_unchecked(); \
} \
ctype to_##name##_unchecked() const { \
return base::ReadLittleEndianValue<ctype>( \
reinterpret_cast<Address>(bit_pattern_)); \
}
FOREACH_PRIMITIVE_WASMVAL_TYPE(DEFINE_TYPE_SPECIFIC_METHODS)
#undef DEFINE_TYPE_SPECIFIC_METHODS
WasmValue(Handle<Object> ref, ValueType type) : type_(type), bit_pattern_{} {
static_assert(sizeof(Handle<Object>) <= sizeof(bit_pattern_),
"bit_pattern_ must be large enough to fit a Handle");
base::WriteUnalignedValue<Handle<Object>>(
reinterpret_cast<Address>(bit_pattern_), ref);
}
Handle<Object> to_ref() const {
DCHECK(type_.is_reference());
return base::ReadUnalignedValue<Handle<Object>>(
reinterpret_cast<Address>(bit_pattern_));
}
ValueType type() const { return type_; }
// Checks equality of type and bit pattern (also for float and double values).
bool operator==(const WasmValue& other) const {
return type_ == other.type_ &&
!memcmp(bit_pattern_, other.bit_pattern_, 16);
}
template <typename T>
inline T to() const;
template <typename T>
inline T to_unchecked() const;
static WasmValue ForUintPtr(uintptr_t value) {
using type =
std::conditional<kSystemPointerSize == 8, uint64_t, uint32_t>::type;
return WasmValue{type{value}};
}
private:
ValueType type_;
uint8_t bit_pattern_[16];
};
#define DECLARE_CAST(name, localtype, ctype, ...) \
template <> \
inline ctype WasmValue::to_unchecked() const { \
return to_##name##_unchecked(); \
} \
template <> \
inline ctype WasmValue::to() const { \
return to_##name(); \
}
FOREACH_PRIMITIVE_WASMVAL_TYPE(DECLARE_CAST)
#undef DECLARE_CAST
} // namespace wasm
} // namespace internal
} // namespace v8
#endif // V8_WASM_WASM_VALUE_H_
|
