summaryrefslogtreecommitdiffstats
path: root/src/shader_recompiler/frontend/ir/microinstruction.cpp
blob: 21b7d8a9f4a76b6ef3a7f9431dea8ec3ad57db7e (plain) (blame)
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
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#include <algorithm>
#include <memory>

#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/frontend/ir/type.h"

namespace Shader::IR {
namespace {
void CheckPseudoInstruction(IR::Inst* inst, IR::Opcode opcode) {
    if (inst && inst->Opcode() != opcode) {
        throw LogicError("Invalid pseudo-instruction");
    }
}

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;
}

void RemovePseudoInstruction(IR::Inst*& inst, IR::Opcode expected_opcode) {
    if (inst->Opcode() != expected_opcode) {
        throw LogicError("Undoing use of invalid pseudo-op");
    }
    inst = nullptr;
}
} // Anonymous namespace

Inst::Inst(IR::Opcode op_, u32 flags_) noexcept : op{op_}, flags{flags_} {
    if (op == Opcode::Phi) {
        std::construct_at(&phi_args);
    } else {
        std::construct_at(&args);
    }
}

Inst::~Inst() {
    if (op == Opcode::Phi) {
        std::destroy_at(&phi_args);
    } else {
        std::destroy_at(&args);
    }
}

bool Inst::MayHaveSideEffects() const noexcept {
    switch (op) {
    case Opcode::Branch:
    case Opcode::BranchConditional:
    case Opcode::LoopMerge:
    case Opcode::SelectionMerge:
    case Opcode::Return:
    case Opcode::DemoteToHelperInvocation:
    case Opcode::SetAttribute:
    case Opcode::SetAttributeIndexed:
    case Opcode::SetFragColor:
    case Opcode::SetFragDepth:
    case Opcode::WriteGlobalU8:
    case Opcode::WriteGlobalS8:
    case Opcode::WriteGlobalU16:
    case Opcode::WriteGlobalS16:
    case Opcode::WriteGlobal32:
    case Opcode::WriteGlobal64:
    case Opcode::WriteGlobal128:
    case Opcode::WriteStorageU8:
    case Opcode::WriteStorageS8:
    case Opcode::WriteStorageU16:
    case Opcode::WriteStorageS16:
    case Opcode::WriteStorage32:
    case Opcode::WriteStorage64:
    case Opcode::WriteStorage128:
        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::GetSparseFromOp:
        return true;
    default:
        return false;
    }
}

bool Inst::AreAllArgsImmediates() const {
    if (op == Opcode::Phi) {
        throw LogicError("Testing for all arguments are immediates on phi instruction");
    }
    return std::all_of(args.begin(), args.begin() + NumArgs(),
                       [](const IR::Value& value) { return value.IsImmediate(); });
}

Inst* Inst::GetAssociatedPseudoOperation(IR::Opcode opcode) {
    if (!associated_insts) {
        return nullptr;
    }
    switch (opcode) {
    case Opcode::GetZeroFromOp:
        CheckPseudoInstruction(associated_insts->zero_inst, Opcode::GetZeroFromOp);
        return associated_insts->zero_inst;
    case Opcode::GetSignFromOp:
        CheckPseudoInstruction(associated_insts->sign_inst, Opcode::GetSignFromOp);
        return associated_insts->sign_inst;
    case Opcode::GetCarryFromOp:
        CheckPseudoInstruction(associated_insts->carry_inst, Opcode::GetCarryFromOp);
        return associated_insts->carry_inst;
    case Opcode::GetOverflowFromOp:
        CheckPseudoInstruction(associated_insts->overflow_inst, Opcode::GetOverflowFromOp);
        return associated_insts->overflow_inst;
    case Opcode::GetSparseFromOp:
        CheckPseudoInstruction(associated_insts->sparse_inst, Opcode::GetSparseFromOp);
        return associated_insts->sparse_inst;
    default:
        throw InvalidArgument("{} is not a pseudo-instruction", opcode);
    }
}

size_t Inst::NumArgs() const {
    return op == Opcode::Phi ? phi_args.size() : NumArgsOf(op);
}

IR::Type Inst::Type() const {
    return TypeOf(op);
}

Value Inst::Arg(size_t index) const {
    if (op == Opcode::Phi) {
        if (index >= phi_args.size()) {
            throw InvalidArgument("Out of bounds argument index {} in phi instruction", index);
        }
        return phi_args[index].second;
    } else {
        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 >= NumArgs()) {
        throw InvalidArgument("Out of bounds argument index {} in opcode {}", index, op);
    }
    const IR::Value arg{Arg(index)};
    if (!arg.IsImmediate()) {
        UndoUse(arg);
    }
    if (!value.IsImmediate()) {
        Use(value);
    }
    if (op == Opcode::Phi) {
        phi_args[index].second = value;
    } else {
        args[index] = value;
    }
}

Block* Inst::PhiBlock(size_t index) const {
    if (op != Opcode::Phi) {
        throw LogicError("{} is not a Phi instruction", op);
    }
    if (index >= phi_args.size()) {
        throw InvalidArgument("Out of bounds argument index {} in phi instruction");
    }
    return phi_args[index].first;
}

void Inst::AddPhiOperand(Block* predecessor, const Value& value) {
    if (!value.IsImmediate()) {
        Use(value);
    }
    phi_args.emplace_back(predecessor, value);
}

void Inst::Invalidate() {
    ClearArgs();
    ReplaceOpcode(Opcode::Void);
}

void Inst::ClearArgs() {
    if (op == Opcode::Phi) {
        for (auto& pair : phi_args) {
            IR::Value& value{pair.second};
            if (!value.IsImmediate()) {
                UndoUse(value);
            }
        }
        phi_args.clear();
    } else {
        for (auto& value : args) {
            if (!value.IsImmediate()) {
                UndoUse(value);
            }
            value = {};
        }
    }
}

void Inst::ReplaceUsesWith(Value replacement) {
    Invalidate();
    ReplaceOpcode(Opcode::Identity);
    if (!replacement.IsImmediate()) {
        Use(replacement);
    }
    args[0] = replacement;
}

void Inst::ReplaceOpcode(IR::Opcode opcode) {
    if (opcode == IR::Opcode::Phi) {
        throw LogicError("Cannot transition into Phi");
    }
    if (op == Opcode::Phi) {
        // Transition out of phi arguments into non-phi
        std::destroy_at(&phi_args);
        std::construct_at(&args);
    }
    op = opcode;
}

void AllocAssociatedInsts(std::unique_ptr<AssociatedInsts>& associated_insts) {
    if (!associated_insts) {
        associated_insts = std::make_unique<AssociatedInsts>();
    }
}

void Inst::Use(const Value& value) {
    Inst* const inst{value.Inst()};
    ++inst->use_count;

    std::unique_ptr<AssociatedInsts>& assoc_inst{inst->associated_insts};
    switch (op) {
    case Opcode::GetZeroFromOp:
        AllocAssociatedInsts(assoc_inst);
        SetPseudoInstruction(assoc_inst->zero_inst, this);
        break;
    case Opcode::GetSignFromOp:
        AllocAssociatedInsts(assoc_inst);
        SetPseudoInstruction(assoc_inst->sign_inst, this);
        break;
    case Opcode::GetCarryFromOp:
        AllocAssociatedInsts(assoc_inst);
        SetPseudoInstruction(assoc_inst->carry_inst, this);
        break;
    case Opcode::GetOverflowFromOp:
        AllocAssociatedInsts(assoc_inst);
        SetPseudoInstruction(assoc_inst->overflow_inst, this);
        break;
    case Opcode::GetSparseFromOp:
        AllocAssociatedInsts(assoc_inst);
        SetPseudoInstruction(assoc_inst->sparse_inst, this);
        break;
    default:
        break;
    }
}

void Inst::UndoUse(const Value& value) {
    Inst* const inst{value.Inst()};
    --inst->use_count;

    std::unique_ptr<AssociatedInsts>& assoc_inst{inst->associated_insts};
    switch (op) {
    case Opcode::GetZeroFromOp:
        AllocAssociatedInsts(assoc_inst);
        RemovePseudoInstruction(assoc_inst->zero_inst, Opcode::GetZeroFromOp);
        break;
    case Opcode::GetSignFromOp:
        AllocAssociatedInsts(assoc_inst);
        RemovePseudoInstruction(assoc_inst->sign_inst, Opcode::GetSignFromOp);
        break;
    case Opcode::GetCarryFromOp:
        AllocAssociatedInsts(assoc_inst);
        RemovePseudoInstruction(assoc_inst->carry_inst, Opcode::GetCarryFromOp);
        break;
    case Opcode::GetOverflowFromOp:
        AllocAssociatedInsts(assoc_inst);
        RemovePseudoInstruction(assoc_inst->overflow_inst, Opcode::GetOverflowFromOp);
        break;
    default:
        break;
    }
}

} // namespace Shader::IR