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
|
/*
* Copyright 2019 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef wasm_features_h
#define wasm_features_h
#include <stdint.h>
#include <string>
#include "compiler-support.h"
struct FeatureSet {
enum Feature : uint32_t {
MVP = 0,
Atomics = 1 << 0,
MutableGlobals = 1 << 1,
TruncSat = 1 << 2,
SIMD = 1 << 3,
BulkMemory = 1 << 4,
SignExt = 1 << 5,
ExceptionHandling = 1 << 6,
All = Atomics | MutableGlobals | TruncSat | SIMD | BulkMemory | SignExt |
ExceptionHandling
};
static std::string toString(Feature f) {
switch (f) {
case Atomics:
return "threads";
case MutableGlobals:
return "mutable-globals";
case TruncSat:
return "nontrapping-float-to-int";
case SIMD:
return "simd";
case BulkMemory:
return "bulk-memory";
case SignExt:
return "sign-ext";
case ExceptionHandling:
return "exception-handling";
default:
WASM_UNREACHABLE();
}
}
FeatureSet() : features(MVP) {}
FeatureSet(uint32_t features) : features(features) {}
bool isMVP() const { return features == MVP; }
bool has(Feature f) { return (features & f) == f; }
bool hasAtomics() const { return features & Atomics; }
bool hasMutableGlobals() const { return features & MutableGlobals; }
bool hasTruncSat() const { return features & TruncSat; }
bool hasSIMD() const { return features & SIMD; }
bool hasBulkMemory() const { return features & BulkMemory; }
bool hasSignExt() const { return features & SignExt; }
bool hasExceptionHandling() const { return features & ExceptionHandling; }
bool hasAll() const { return features & All; }
void makeMVP() { features = MVP; }
void set(Feature f, bool v = true) {
features = v ? (features | f) : (features & ~f);
}
void setAtomics(bool v = true) { set(Atomics, v); }
void setMutableGlobals(bool v = true) { set(MutableGlobals, v); }
void setTruncSat(bool v = true) { set(TruncSat, v); }
void setSIMD(bool v = true) { set(SIMD, v); }
void setBulkMemory(bool v = true) { set(BulkMemory, v); }
void setSignExt(bool v = true) { set(SignExt, v); }
void setExceptionHandling(bool v = true) { set(ExceptionHandling, v); }
void setAll(bool v = true) { features = v ? All : MVP; }
void enable(const FeatureSet& other) { features |= other.features; }
void disable(const FeatureSet& other) {
features = features & ~other.features & All;
}
template<typename F> void iterFeatures(F f) {
if (hasAtomics()) {
f(Atomics);
}
if (hasBulkMemory()) {
f(BulkMemory);
}
if (hasExceptionHandling()) {
f(ExceptionHandling);
}
if (hasMutableGlobals()) {
f(MutableGlobals);
}
if (hasTruncSat()) {
f(TruncSat);
}
if (hasSignExt()) {
f(SignExt);
}
if (hasSIMD()) {
f(SIMD);
}
}
bool operator<=(const FeatureSet& other) const {
return !(features & ~other.features);
}
bool operator==(const FeatureSet& other) const {
return *this <= other && other <= *this;
}
bool operator!=(const FeatureSet& other) const { return !(*this == other); }
FeatureSet& operator|=(const FeatureSet& other) {
features |= other.features;
return *this;
}
private:
uint32_t features;
};
#endif // wasm_features_h
|