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
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/frontend/ir/type.h"
namespace Shader::IR {
static void CheckPseudoInstruction(IR::Inst* inst, IR::Opcode opcode) {
if (inst && inst->Opcode() != opcode) {
throw LogicError("Invalid pseudo-instruction");
}
}
static void SetPseudoInstruction(IR::Inst*& dest_inst, IR::Inst* pseudo_inst) {
if (dest_inst) {
throw LogicError("Only one of each type of pseudo-op allowed");
}
dest_inst = pseudo_inst;
}
static void RemovePseudoInstruction(IR::Inst*& inst, IR::Opcode expected_opcode) {
if (inst->Opcode() != expected_opcode) {
throw LogicError("Undoing use of invalid pseudo-op");
}
inst = nullptr;
}
bool Inst::MayHaveSideEffects() const noexcept {
switch (op) {
case Opcode::Branch:
case Opcode::BranchConditional:
case Opcode::Exit:
case Opcode::Return:
case Opcode::Unreachable:
case Opcode::SetAttribute:
case Opcode::SetAttributeIndexed:
case Opcode::WriteGlobalU8:
case Opcode::WriteGlobalS8:
case Opcode::WriteGlobalU16:
case Opcode::WriteGlobalS16:
case Opcode::WriteGlobal32:
case Opcode::WriteGlobal64:
case Opcode::WriteGlobal128:
return true;
default:
return false;
}
}
bool Inst::IsPseudoInstruction() const noexcept {
switch (op) {
case Opcode::GetZeroFromOp:
case Opcode::GetSignFromOp:
case Opcode::GetCarryFromOp:
case Opcode::GetOverflowFromOp:
case Opcode::GetZSCOFromOp:
return true;
default:
return false;
}
}
bool Inst::HasAssociatedPseudoOperation() const noexcept {
return zero_inst || sign_inst || carry_inst || overflow_inst || zsco_inst;
}
Inst* Inst::GetAssociatedPseudoOperation(IR::Opcode opcode) {
// This is faster than doing a search through the block.
switch (opcode) {
case Opcode::GetZeroFromOp:
CheckPseudoInstruction(zero_inst, Opcode::GetZeroFromOp);
return zero_inst;
case Opcode::GetSignFromOp:
CheckPseudoInstruction(sign_inst, Opcode::GetSignFromOp);
return sign_inst;
case Opcode::GetCarryFromOp:
CheckPseudoInstruction(carry_inst, Opcode::GetCarryFromOp);
return carry_inst;
case Opcode::GetOverflowFromOp:
CheckPseudoInstruction(overflow_inst, Opcode::GetOverflowFromOp);
return overflow_inst;
case Opcode::GetZSCOFromOp:
CheckPseudoInstruction(zsco_inst, Opcode::GetZSCOFromOp);
return zsco_inst;
default:
throw InvalidArgument("{} is not a pseudo-instruction", opcode);
}
}
size_t Inst::NumArgs() const {
return NumArgsOf(op);
}
IR::Type Inst::Type() const {
return TypeOf(op);
}
Value Inst::Arg(size_t index) const {
if (index >= NumArgsOf(op)) {
throw InvalidArgument("Out of bounds argument index {} in opcode {}", index, op);
}
return args[index];
}
void Inst::SetArg(size_t index, Value value) {
if (index >= NumArgsOf(op)) {
throw InvalidArgument("Out of bounds argument index {} in opcode {}", index, op);
}
if (!args[index].IsImmediate()) {
UndoUse(args[index]);
}
if (!value.IsImmediate()) {
Use(value);
}
args[index] = value;
}
std::span<const std::pair<Block*, Value>> Inst::PhiOperands() const noexcept {
return phi_operands;
}
void Inst::AddPhiOperand(Block* predecessor, const Value& value) {
if (!value.IsImmediate()) {
Use(value);
}
phi_operands.emplace_back(predecessor, value);
}
void Inst::Invalidate() {
ClearArgs();
op = Opcode::Void;
}
void Inst::ClearArgs() {
for (auto& value : args) {
if (!value.IsImmediate()) {
UndoUse(value);
}
value = {};
}
for (auto& [phi_block, phi_op] : phi_operands) {
if (!phi_op.IsImmediate()) {
UndoUse(phi_op);
}
}
phi_operands.clear();
}
void Inst::ReplaceUsesWith(Value replacement) {
Invalidate();
op = Opcode::Identity;
if (!replacement.IsImmediate()) {
Use(replacement);
}
args[0] = replacement;
}
void Inst::Use(const Value& value) {
++value.Inst()->use_count;
switch (op) {
case Opcode::GetZeroFromOp:
SetPseudoInstruction(value.Inst()->zero_inst, this);
break;
case Opcode::GetSignFromOp:
SetPseudoInstruction(value.Inst()->sign_inst, this);
break;
case Opcode::GetCarryFromOp:
SetPseudoInstruction(value.Inst()->carry_inst, this);
break;
case Opcode::GetOverflowFromOp:
SetPseudoInstruction(value.Inst()->overflow_inst, this);
break;
case Opcode::GetZSCOFromOp:
SetPseudoInstruction(value.Inst()->zsco_inst, this);
break;
default:
break;
}
}
void Inst::UndoUse(const Value& value) {
--value.Inst()->use_count;
switch (op) {
case Opcode::GetZeroFromOp:
RemovePseudoInstruction(value.Inst()->zero_inst, Opcode::GetZeroFromOp);
break;
case Opcode::GetSignFromOp:
RemovePseudoInstruction(value.Inst()->sign_inst, Opcode::GetSignFromOp);
break;
case Opcode::GetCarryFromOp:
RemovePseudoInstruction(value.Inst()->carry_inst, Opcode::GetCarryFromOp);
break;
case Opcode::GetOverflowFromOp:
RemovePseudoInstruction(value.Inst()->overflow_inst, Opcode::GetOverflowFromOp);
break;
case Opcode::GetZSCOFromOp:
RemovePseudoInstruction(value.Inst()->zsco_inst, Opcode::GetZSCOFromOp);
break;
default:
break;
}
}
} // namespace Shader::IR
|
