dynarmic/src/backend_x64/constant_pool.h

/* This file is part of the dynarmic project.
 * Copyright (c) 2016 MerryMage
 * This software may be used and distributed according to the terms of the GNU
 * General Public License version 2 or any later version.
 */

#pragma once

#include <map>

#include <xbyak.h>

#include "common/common_types.h"

namespace Dynarmic::BackendX64 {

class BlockOfCode;

/// ConstantPool allocates a block of memory from BlockOfCode.
/// It places constants into this block of memory, returning the address
/// of the memory location where the constant is placed. If the constant
/// already exists, its memory location is reused.
class ConstantPool final {
public:
    ConstantPool(BlockOfCode& code, size_t size);

    Xbyak::Address GetConstant(u64 lower, u64 upper = 0);

private:
    static constexpr size_t align_size = 16; // bytes

    std::map<std::tuple<u64, u64>, void*> constant_info;

    BlockOfCode& code;
    size_t pool_size;
    u8* pool_begin;
    u8* current_pool_ptr;
};

} // namespace Dynarmic::BackendX64