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
|
// Copyright 2019 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <list>
#include <memory>
#include <optional>
#include <string>
#include <unordered_map>
#include <vector>
#include "video_core/shader/expr.h"
#include "video_core/shader/node.h"
namespace VideoCommon::Shader {
class ASTBase;
class ASTProgram;
class ASTIf;
class ASTBlockEncoded;
class ASTVarSet;
class ASTGoto;
class ASTLabel;
class ASTDoWhile;
class ASTReturn;
using ASTData = std::variant<ASTProgram, ASTIf, ASTBlockEncoded, ASTVarSet, ASTGoto, ASTLabel,
ASTDoWhile, ASTReturn>;
using ASTNode = std::shared_ptr<ASTBase>;
class ASTProgram {
public:
ASTProgram() = default;
std::list<ASTNode> nodes;
};
class ASTIf {
public:
ASTIf(Expr condition, std::list<ASTNode> then_nodes, std::list<ASTNode> else_nodes)
: condition(condition), then_nodes{then_nodes}, else_nodes{then_nodes} {}
Expr condition;
std::list<ASTNode> then_nodes;
std::list<ASTNode> else_nodes;
};
class ASTBlockEncoded {
public:
ASTBlockEncoded(u32 start, u32 end) : start{start}, end{end} {}
u32 start;
u32 end;
};
class ASTVarSet {
public:
ASTVarSet(u32 index, Expr condition) : index{index}, condition{condition} {}
u32 index;
Expr condition;
};
class ASTLabel {
public:
ASTLabel(u32 index) : index{index} {}
u32 index;
};
class ASTGoto {
public:
ASTGoto(Expr condition, u32 label) : condition{condition}, label{label} {}
Expr condition;
u32 label;
};
class ASTDoWhile {
public:
ASTDoWhile(Expr condition, std::list<ASTNode> loop_nodes)
: condition(condition), loop_nodes{loop_nodes} {}
Expr condition;
std::list<ASTNode> loop_nodes;
};
class ASTReturn {
public:
ASTReturn(Expr condition, bool kills) : condition{condition}, kills{kills} {}
Expr condition;
bool kills;
};
class ASTBase {
public:
explicit ASTBase(ASTNode parent, ASTData data) : parent{parent}, data{data} {}
template <class U, class... Args>
static ASTNode Make(ASTNode parent, Args&&... args) {
return std::make_shared<ASTBase>(parent, ASTData(U(std::forward<Args>(args)...)));
}
void SetParent(ASTNode new_parent) {
parent = new_parent;
}
ASTNode& GetParent() {
return parent;
}
const ASTNode& GetParent() const {
return parent;
}
u32 GetLevel() const {
u32 level = 0;
auto next = parent;
while (next) {
next = next->GetParent();
level++;
}
return level;
}
ASTData* GetInnerData() {
return &data;
}
private:
ASTData data;
ASTNode parent;
};
class ASTManager final {
public:
explicit ASTManager() {
main_node = ASTBase::Make<ASTProgram>(nullptr);
program = std::get_if<ASTProgram>(main_node->GetInnerData());
}
void DeclareLabel(u32 address) {
const auto pair = labels_map.emplace(address, labels_count);
if (pair.second) {
labels_count++;
labels.resize(labels_count);
}
}
void InsertLabel(u32 address) {
u32 index = labels_map[address];
ASTNode label = ASTBase::Make<ASTLabel>(main_node, index);
labels[index] = label;
program->nodes.push_back(label);
}
void InsertGoto(Expr condition, u32 address) {
u32 index = labels_map[address];
ASTNode goto_node = ASTBase::Make<ASTGoto>(main_node, condition, index);
gotos.push_back(goto_node);
program->nodes.push_back(goto_node);
}
void InsertBlock(u32 start_address, u32 end_address) {
ASTNode block = ASTBase::Make<ASTBlockEncoded>(main_node, start_address, end_address);
program->nodes.push_back(block);
}
void InsertReturn(Expr condition, bool kills) {
ASTNode node = ASTBase::Make<ASTReturn>(main_node, condition, kills);
program->nodes.push_back(node);
}
std::string Print();
void Decompile() {}
private:
std::unordered_map<u32, u32> labels_map{};
u32 labels_count{};
std::vector<ASTNode> labels{};
std::list<ASTNode> gotos{};
u32 variables{};
ASTProgram* program;
ASTNode main_node;
};
} // namespace VideoCommon::Shader
|
