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// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <bitset>
#include "common/bit_field.h"
#include "common/common_types.h"
namespace Shader::IR {
class Inst;
class Value;
} // namespace Shader::IR
namespace Shader::Backend::GLASM {
class EmitContext;
struct Id {
union {
u32 raw;
BitField<0, 30, u32> index;
BitField<30, 1, u32> is_spill;
BitField<31, 1, u32> is_condition_code;
};
};
class RegAlloc {
public:
RegAlloc(EmitContext& ctx_) : ctx{ctx_} {}
std::string Define(IR::Inst& inst);
std::string Consume(const IR::Value& value);
[[nodiscard]] size_t NumUsedRegisters() const noexcept {
return num_used_registers;
}
private:
static constexpr size_t NUM_REGS = 4096;
static constexpr size_t NUM_ELEMENTS = 4;
EmitContext& ctx;
std::string Consume(IR::Inst& inst);
Id Alloc();
void Free(Id id);
size_t num_used_registers{};
std::bitset<NUM_REGS> register_use{};
};
} // namespace Shader::Backend::GLASM
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