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
|
/*
* Copyright 2016 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_builder_h
#define wasm_builder_h
#include <wasm.h>
namespace wasm {
class Builder {
MixedArena &allocator;
public:
Builder(AllocatingModule& wasm) : allocator(wasm.allocator) {}
// Nop TODO: add all the rest
// Block
If* makeIf(Expression* condition, Expression* ifTrue, Expression* ifFalse=nullptr) {
auto* ret = allocator.alloc<If>();
ret->condition = condition; ret->ifTrue = ifTrue; ret->ifFalse = ifFalse;
ret->finalize();
return ret;
}
// Loop
// Break
// Switch
// CallBase
// Call
// CallImport
// FunctionType
GetLocal* makeGetLocal(Name name, WasmType type) {
auto* ret = allocator.alloc<GetLocal>();
ret->name = name;
ret->type = type;
return ret;
}
SetLocal* makeSetLocal(Name name, Expression* value) {
auto* ret = allocator.alloc<SetLocal>();
ret->name = name;
ret->value = value;
ret->type = value->type;
return ret;
}
// Load
Store* makeStore(unsigned bytes, uint32_t offset, unsigned align, Expression *ptr, Expression *value) {
auto* ret = allocator.alloc<Store>();
ret->bytes = bytes; ret->offset = offset; ret->align = align; ret->ptr = ptr; ret->value = value;
ret->type = value->type;
return ret;
}
Const* makeConst(Literal value) {
auto* ret = allocator.alloc<Const>();
ret->value = value;
ret->type = value.type;
return ret;
}
Unary* makeUnary(UnaryOp op, Expression *value, WasmType type=none) {
auto* ret = allocator.alloc<Unary>();
ret->op = op; ret->value = value;
if (type != none) {
ret->type = type; // some opcodes have more than one type, user must provide it
} else {
switch (op) {
case Clz:
case Ctz:
case Popcnt:
case Neg:
case Abs:
case Ceil:
case Floor:
case Trunc:
case Nearest:
case Sqrt: ret->type = value->type; break;
case EqZ: ret->type = i32; break;
case ExtendSInt32: case ExtendUInt32: ret->type = i64; break;
case WrapInt64: ret->type = i32; break;
case PromoteFloat32: ret->type = f64; break;
case DemoteFloat64: ret->type = f32; break;
case TruncSFloat32: case TruncUFloat32: case TruncSFloat64: case TruncUFloat64: case ReinterpretFloat:
case ConvertSInt32: case ConvertUInt32: case ConvertSInt64: case ConvertUInt64: case ReinterpretInt: abort(); // user needs to say the type
default: abort();
}
}
return ret;
}
Binary* makeBinary(BinaryOp op, Expression *left, Expression *right) {
auto* ret = allocator.alloc<Binary>();
ret->op = op; ret->left = left; ret->right = right;
ret->finalize();
return ret;
}
// Select
// Return
// Host
// Unreachable
};
} // namespace wasm
#endif // wasm_builder_h
|
