pound/core/ARM/cpu.h

// Copyright 2025 Pound Emulator Project. All rights reserved.

#pragma once

#include <cstring>

#include "Base/Logging/Log.h"

struct CPU {
    u64 regs[31] = {0}; // X0–X30
    u64 pc = 0;
    static constexpr size_t MEM_SIZE = 64 * 1024;
    u8 memory[MEM_SIZE];

    CPU() {
        std::memset(memory, 0, MEM_SIZE);
    }

    u64& x(int i) {
        return regs[i];
    }

    u8 read_byte(u64 addr) {
        if (addr >= MEM_SIZE) {
            LOG_INFO(ARM, "{} out of bounds", addr);
        }
        return memory[addr];
    }

    void write_byte(u64 addr, u8 byte) {
        if (addr >= MEM_SIZE) {
            LOG_INFO(ARM, "{} out of bounds", addr);
        }
        memory[addr] = byte;
    }

    void print_debug_information() {
        LOG_INFO(ARM, "PC = {}", pc);
        for (int reg = 0; reg < 32; reg++) {
            LOG_INFO(ARM, "X{} = {}", reg, x(reg)); // X0 = 0...
        }
    }
};