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https://github.com/yuzu-mirror/yuzu
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104 lines
3.2 KiB
C++
104 lines
3.2 KiB
C++
// Copyright 2021 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <array>
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#include <cstring>
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#include <span>
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#include <type_traits>
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#include <vector>
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#include <boost/intrusive/list.hpp>
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#include "common/common_types.h"
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#include "shader_recompiler/frontend/ir/opcode.h"
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#include "shader_recompiler/frontend/ir/type.h"
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#include "shader_recompiler/frontend/ir/value.h"
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namespace Shader::IR {
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class Block;
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constexpr size_t MAX_ARG_COUNT = 4;
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class Inst : public boost::intrusive::list_base_hook<> {
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public:
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explicit Inst(Opcode op_, u64 flags_) noexcept : op{op_}, flags{flags_} {}
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/// Get the number of uses this instruction has.
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[[nodiscard]] int UseCount() const noexcept {
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return use_count;
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}
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/// Determines whether this instruction has uses or not.
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[[nodiscard]] bool HasUses() const noexcept {
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return use_count > 0;
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}
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/// Get the opcode this microinstruction represents.
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[[nodiscard]] IR::Opcode Opcode() const noexcept {
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return op;
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}
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/// Determines whether or not this instruction may have side effects.
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[[nodiscard]] bool MayHaveSideEffects() const noexcept;
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/// Determines whether or not this instruction is a pseudo-instruction.
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/// Pseudo-instructions depend on their parent instructions for their semantics.
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[[nodiscard]] bool IsPseudoInstruction() const noexcept;
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/// Determines if all arguments of this instruction are immediates.
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[[nodiscard]] bool AreAllArgsImmediates() const noexcept;
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/// Determines if there is a pseudo-operation associated with this instruction.
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[[nodiscard]] bool HasAssociatedPseudoOperation() const noexcept;
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/// Gets a pseudo-operation associated with this instruction
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[[nodiscard]] Inst* GetAssociatedPseudoOperation(IR::Opcode opcode);
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/// Get the number of arguments this instruction has.
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[[nodiscard]] size_t NumArgs() const;
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/// Get the type this instruction returns.
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[[nodiscard]] IR::Type Type() const;
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/// Get the value of a given argument index.
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[[nodiscard]] Value Arg(size_t index) const;
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/// Set the value of a given argument index.
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void SetArg(size_t index, Value value);
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/// Get an immutable span to the phi operands.
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[[nodiscard]] std::span<const std::pair<Block*, Value>> PhiOperands() const noexcept;
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/// Add phi operand to a phi instruction.
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void AddPhiOperand(Block* predecessor, const Value& value);
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void Invalidate();
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void ClearArgs();
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void ReplaceUsesWith(Value replacement);
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template <typename FlagsType>
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requires(sizeof(FlagsType) <= sizeof(u64) && std::is_trivially_copyable_v<FlagsType>)
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[[nodiscard]] FlagsType Flags() const noexcept {
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FlagsType ret;
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std::memcpy(&ret, &flags, sizeof(ret));
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return ret;
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}
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private:
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void Use(const Value& value);
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void UndoUse(const Value& value);
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IR::Opcode op{};
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int use_count{};
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std::array<Value, MAX_ARG_COUNT> args{};
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Inst* zero_inst{};
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Inst* sign_inst{};
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Inst* carry_inst{};
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Inst* overflow_inst{};
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std::vector<std::pair<Block*, Value>> phi_operands;
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u64 flags{};
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};
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} // namespace Shader::IR
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