59 lines
1.1 KiB
C++
59 lines
1.1 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 <bitset>
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#include "common/bit_field.h"
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#include "common/common_types.h"
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namespace Shader::IR {
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class Inst;
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class Value;
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} // namespace Shader::IR
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namespace Shader::Backend::GLASM {
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class EmitContext;
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struct Id {
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union {
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u32 raw;
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BitField<0, 30, u32> index;
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BitField<30, 1, u32> is_spill;
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BitField<31, 1, u32> is_condition_code;
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};
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};
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class RegAlloc {
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public:
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RegAlloc(EmitContext& ctx_) : ctx{ctx_} {}
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std::string Define(IR::Inst& inst);
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std::string Consume(const IR::Value& value);
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[[nodiscard]] size_t NumUsedRegisters() const noexcept {
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return num_used_registers;
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}
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private:
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static constexpr size_t NUM_REGS = 4096;
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static constexpr size_t NUM_ELEMENTS = 4;
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EmitContext& ctx;
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std::string Consume(IR::Inst& inst);
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Id Alloc();
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void Free(Id id);
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size_t num_used_registers{};
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std::bitset<NUM_REGS> register_use{};
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};
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} // namespace Shader::Backend::GLASM
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