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
|
// @flow
/* eslint no-unused-vars: off */
type Bytes = number;
type Functype = [Array<Valtype>, Array<Valtype>];
type Addr = {
index: Bytes,
size: Bytes
};
type FuncAddr = Addr;
type TableAddr = Addr;
type MemAddr = Addr;
type GlobalAddr = Addr;
interface ExternalVal {
type: string;
addr: Addr;
}
type FuncExternalVal = ExternalVal & {
type: "Func"
};
type ExportInstance = {
name: string,
value: ExternalVal
};
type FuncInstance = {
type: Functype,
module: ?ModuleInstance, // its originating module
// TODO(sven): according to the spec the code property is a string
// see https://webassembly.github.io/spec/core/exec/runtime.html#function-instances
// but in the context of an interpreter it make no sense to me.
// I'll store the instructions from the function body here.
code: Array<Instruction> | Function,
isExternal: boolean
};
type GlobalInstance = {
type: Valtype,
mutability: Mutability,
value: ?NumericOperations<*>
};
type ModuleInstance = {
types: any,
funcaddrs: Array<FuncAddr>,
tableaddrs: Array<TableAddr>,
memaddrs: Array<MemAddr>,
globaladdrs: Array<GlobalAddr>,
exports: Array<ExportInstance>
};
/**
* Stack
*/
// https://webassembly.github.io/spec/core/exec/runtime.html#syntax-frame
type StackFrame = {
values: Array<any>,
globals: Array<any>,
locals: Array<StackLocal>,
labels: Array<Label>,
originatingModule: ModuleInstance,
allocator: Allocator,
trace?: (number, number, Instruction, StackFrame) => void,
returnAddress: number
};
type StackLocal = {
type: Valtype,
value: any
};
type i32 = any;
interface IntegerValue<T> extends NumericOperations<T> {
div_s(operand: T): T;
div_u(operand: T): T;
rem_s(operand: T): T;
rem_u(operand: T): T;
shl(operand: T): T;
shr_s(operand: T): T;
shr_u(operand: T): T;
rotl(operand: T): T;
rotr(operand: T): T;
and(operand: T): T;
or(operand: T): T;
xor(operand: T): T;
eq(operand: T): i32;
ne(operand: T): i32;
lt_s(operand: T): i32;
lt_u(operand: T): i32;
le_s(operand: T): i32;
le_u(operand: T): i32;
gt_s(operand: T): i32;
gt_u(operand: T): i32;
ge_s(operand: T): i32;
ge_u(operand: T): i32;
clz(): T;
popcnt(): T;
eqz(): i32;
}
interface FloatingPointValue<T, U> extends NumericOperations<T> {
min(operand: T): T;
max(operand: T): T;
copysign(operand: T): T;
neg(): T;
abs(): T;
reinterpret(): U;
eq(operand: T): i32;
}
interface NumericOperations<T> {
add(operand: T): T;
sub(operand: T): T;
mul(operand: T): T;
div(operand: T): T;
equals(operand: T): boolean;
toNumber(): number;
toString(): string;
isTrue(): boolean;
toString(): string;
// converts the number into an array of bytes - for integers
// this is in little-endian order
toByteArray(): Array<number>;
}
type Label = {
arity: number,
value: any,
id: ?Identifier
};
interface Allocator {
malloc(Bytes): Addr;
get(Addr): any;
set(Addr, any): void;
free(Addr): void;
}
interface TableInstance {
get(number): ?Hostfunc;
push(Hostfunc): void;
}
type SignatureMap = { [string]: string } | [string, string];
type IRFuncTable = {
name: string,
startAt: number
};
type IR = {
funcTable: Array<IRFuncTable>,
program: {
[number]: Instruction
}
};
|
