struct Decompressor;

struct SPC7110 : Cothread {
  SPC7110();
  ~SPC7110();

  static auto Enter() -> void;
  auto main() -> void;
  auto init() -> void;
  auto load() -> void;
  auto unload() -> void;
  auto power() -> void;
  auto reset() -> void;

  auto add_clocks(uint clocks) -> void;

  auto read(uint24 addr, uint8 data) -> uint8;
  auto write(uint24 addr, uint8 data) -> void;

  auto mcurom_read(uint24 addr, uint8 data) -> uint8;
  auto mcurom_write(uint24 addr, uint8 data) -> void;

  auto mcuram_read(uint24 addr, uint8 data) -> uint8;
  auto mcuram_write(uint24 addr, uint8 data) -> void;

  auto serialize(serializer&) -> void;

  //dcu.cpp
  auto dcu_load_address() -> void;
  auto dcu_begin_transfer() -> void;
  auto dcu_read() -> uint8;

  auto deinterleave_1bpp(uint length) -> void;
  auto deinterleave_2bpp(uint length) -> void;
  auto deinterleave_4bpp(uint length) -> void;

  //data.cpp
  auto datarom_read(uint addr) -> uint8;

  auto data_offset() -> uint;
  auto data_adjust() -> uint;
  auto data_stride() -> uint;

  auto set_data_offset(uint addr) -> void;
  auto set_data_adjust(uint addr) -> void;

  auto data_port_read() -> void;

  auto data_port_increment_4810() -> void;
  auto data_port_increment_4814() -> void;
  auto data_port_increment_4815() -> void;
  auto data_port_increment_481a() -> void;

  //alu.cpp
  auto alu_multiply() -> void;
  auto alu_divide() -> void;

  MappedRAM prom;  //program ROM
  MappedRAM drom;  //data ROM
  MappedRAM ram;

private:
  //decompression unit
  uint8 r4801;  //compression table B0
  uint8 r4802;  //compression table B1
  uint7 r4803;  //compression table B2
  uint8 r4804;  //compression table index
  uint8 r4805;  //adjust length B0
  uint8 r4806;  //adjust length B1
  uint8 r4807;  //stride length
  uint8 r4809;  //compression counter B0
  uint8 r480a;  //compression counter B1
  uint8 r480b;  //decompression settings
  uint8 r480c;  //decompression status

  bool dcu_pending;
  uint2 dcu_mode;
  uint23 dcu_addr;
  uint dcu_offset;
  uint8 dcu_tile[32];
  Decompressor* decompressor;

  //data port unit
  uint8 r4810;  //data port read + seek
  uint8 r4811;  //data offset B0
  uint8 r4812;  //data offset B1
  uint7 r4813;  //data offset B2
  uint8 r4814;  //data adjust B0
  uint8 r4815;  //data adjust B1
  uint8 r4816;  //data stride B0
  uint8 r4817;  //data stride B1
  uint8 r4818;  //data port settings
  uint8 r481a;  //data port seek

  //arithmetic logic unit
  uint8 r4820;  //16-bit multiplicand B0, 32-bit dividend B0
  uint8 r4821;  //16-bit multiplicand B1, 32-bit dividend B1
  uint8 r4822;  //32-bit dividend B2
  uint8 r4823;  //32-bit dividend B3
  uint8 r4824;  //16-bit multiplier B0
  uint8 r4825;  //16-bit multiplier B1
  uint8 r4826;  //16-bit divisor B0
  uint8 r4827;  //16-bit divisor B1
  uint8 r4828;  //32-bit product B0, 32-bit quotient B0
  uint8 r4829;  //32-bit product B1, 32-bit quotient B1
  uint8 r482a;  //32-bit product B2, 32-bit quotient B2
  uint8 r482b;  //32-bit product B3, 32-bit quotient B3
  uint8 r482c;  //16-bit remainder B0
  uint8 r482d;  //16-bit remainder B1
  uint8 r482e;  //math settings
  uint8 r482f;  //math status

  bool mul_pending;
  bool div_pending;

  //memory control unit
  uint8 r4830;  //bank 0 mapping + SRAM write enable
  uint8 r4831;  //bank 1 mapping
  uint8 r4832;  //bank 2 mapping
  uint8 r4833;  //bank 3 mapping
  uint8 r4834;  //bank mapping settings
};

extern SPC7110 spc7110;