FranLMSP/rmg-001
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rmg-001/src/cpu.rs

3599 lines
196 KiB
Rust
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use std::env;
use crate::utils::{
BitIndex,
get_bit,
set_bit,
join_bytes,
add_half_carry,
sub_half_carry,
add_half_carry_16bit,
};
use crate::bus::{Bus, INTERRUPT_ENABLE_ADDRESS, INTERRUPT_FLAG_ADDRESS};
#[derive(Debug, Copy, Clone)]
pub enum Register {
A, // Accumulator
F, // Flags
B,
C,
D,
E,
H,
L,
// This registers are just the same as above but combined to get a 16 bits register
AF,
BC,
DE,
HL,
SP, // Stack pointer
PC, // Program counter
}
type Rg = Register;
impl Register {
pub fn is_8bit(&self) -> bool {
match self {
Rg::A | Rg::F | Rg::B | Rg::C | Rg::D | Rg::E | Rg::H | Rg::L => true,
Rg::AF | Rg::BC | Rg::DE | Rg::HL | Rg::SP | Rg::PC => false,
}
}
pub fn is_16bit(&self) -> bool {
!self.is_8bit()
}
}
#[derive(Debug, Copy, Clone)]
pub enum FlagRegister {
Zero, // Set when the result of a math operation is zero or if two values matches using the CP instruction
Substract, // Set if a substraction was performed in the last math instruction
HalfCarry, // Set if a carry ocurred from the lower nibble in the last math operation
Carry, // Set if a carry was ocurrend from the last math operation or if register A is the smaller value when executing the CP instruction
}
#[derive(Debug, Copy, Clone)]
pub enum Interrupt {
VBlank,
LCDSTAT,
Timer,
Serial,
Joypad,
}
impl Interrupt {
fn get_bit_index(&self) -> BitIndex {
match self {
Interrupt::VBlank => BitIndex::I0,
Interrupt::LCDSTAT => BitIndex::I1,
Interrupt::Timer => BitIndex::I2,
Interrupt::Serial => BitIndex::I3,
Interrupt::Joypad => BitIndex::I4,
}
}
pub fn get(&self, byte: u8) -> bool {
get_bit(byte, self.get_bit_index())
}
pub fn set(&self, byte: u8, val: bool) -> u8 {
set_bit(byte, val, self.get_bit_index())
}
pub fn get_vector(&self) -> u16 {
match self {
Interrupt::VBlank => 0x40,
Interrupt::LCDSTAT => 0x48,
Interrupt::Timer => 0x50,
Interrupt::Serial => 0x58,
Interrupt::Joypad => 0x60,
}
}
}
pub struct Registers {
a: u8,
f: u8,
b: u8,
c: u8,
d: u8,
e: u8,
h: u8,
l: u8,
sp: u16,
pc: u16,
}
impl Registers {
pub fn new() -> Self {
Self {
a: 0x01,
f: 0xB0, // The first 4 lower bits are always set to 0
b: 0x00,
c: 0x13,
d: 0x00,
e: 0xD8,
h: 0x01,
l: 0x4D,
sp: 0xFFFE,
pc: 0x0100, // On power up, the Gameboy executes the instruction at hex 100
}
}
pub fn get(&self, register: Register) -> u16 {
match register {
Register::A => self.a as u16,
Register::B => self.b as u16,
Register::C => self.c as u16,
Register::D => self.d as u16,
Register::E => self.e as u16,
Register::F => self.f as u16,
Register::H => self.h as u16,
Register::L => self.l as u16,
Register::AF => join_bytes(self.a, self.f),
Register::BC => join_bytes(self.b, self.c),
Register::DE => join_bytes(self.d, self.e),
Register::HL => join_bytes(self.h, self.l),
Register::SP => self.sp,
Register::PC => self.pc,
}
}
pub fn get_8bit(&self, register: Register) -> u8 {
self.get(register).to_be_bytes()[1]
}
pub fn set(&mut self, register: Register, val: u16) {
let bytes = val.to_be_bytes();
match register {
Register::A => self.a = bytes[1],
Register::B => self.b = bytes[1],
Register::C => self.c = bytes[1],
Register::D => self.d = bytes[1],
Register::E => self.e = bytes[1],
Register::F => self.f = bytes[1],
Register::H => self.h = bytes[1],
Register::L => self.l = bytes[1],
Register::AF => {self.a = bytes[0];self.f = bytes[1];},
Register::BC => {self.b = bytes[0];self.c = bytes[1];},
Register::DE => {self.d = bytes[0];self.e = bytes[1];},
Register::HL => {self.h = bytes[0];self.l = bytes[1];},
Register::SP => self.sp = val,
Register::PC => self.pc = val,
}
}
pub fn get_flag(&self, flag: FlagRegister) -> bool {
match flag {
FlagRegister::Zero => get_bit(self.f, BitIndex::I7),
FlagRegister::Substract => get_bit(self.f, BitIndex::I6),
FlagRegister::HalfCarry => get_bit(self.f, BitIndex::I5),
FlagRegister::Carry => get_bit(self.f, BitIndex::I4),
}
}
pub fn set_flag(&mut self, flag: FlagRegister, val: bool) {
match flag {
FlagRegister::Zero => self.f = set_bit(self.f, val, BitIndex::I7),
FlagRegister::Substract => self.f = set_bit(self.f, val, BitIndex::I6),
FlagRegister::HalfCarry => self.f = set_bit(self.f, val, BitIndex::I5),
FlagRegister::Carry => self.f = set_bit(self.f, val, BitIndex::I4),
}
}
pub fn increment(&mut self, register: Register, times: u16) {
let val = self.get(register);
self.set(register, val.wrapping_add(times));
}
pub fn decrement(&mut self, register: Register, times: u16) {
let val = self.get(register);
self.set(register, val.wrapping_sub(times));
}
}
#[derive(Debug)]
#[allow(non_camel_case_types)]
pub enum OpcodeParameter {
Register(Register),
Register_U8(Register, u8),
Register_U16(Register, u16),
Register_I8(Register, i8),
Register_I16(Register, u16),
U8_Register(u8, Register),
U16_Register(u16, Register),
I8_Register(u8, Register),
I16_Register(u16, Register),
Register_16BitAddress(Register, u16),
Register_Register(Register, Register),
Register_RegisterDecrement(Register, Register),
RegisterDecrement_Register(Register, Register),
Register_RegisterIncrement(Register, Register),
RegisterIncrement_Register(Register, Register),
Register_FF00plusRegister(Register, Register),
FF00plusRegister_Register(Register, Register),
Register_FF00plusU8(Register, u8),
FF00plusU8_Register(u8, Register),
Register_RegisterPlusI8(Register, Register, i8),
U8(u8),
I8(i8),
U16(u16),
I16(i16),
FlagRegisterReset(FlagRegister),
FlagRegisterSet(FlagRegister),
FlagRegisterReset_U16(FlagRegister, u16),
FlagRegisterSet_U16(FlagRegister, u16),
FlagRegisterReset_I16(FlagRegister, i16),
FlagRegisterSet_I16(FlagRegister, i16),
FlagRegisterReset_U8(FlagRegister, u8),
FlagRegisterSet_U8(FlagRegister, u8),
FlagRegisterReset_I8(FlagRegister, i8),
FlagRegisterSet_I8(FlagRegister, i8),
NoParam,
}
#[derive(Debug, Copy, Clone)]
pub struct OpcodeParameterBytes(u8, u8, u8, u8);
impl OpcodeParameterBytes {
pub fn from_address(address: u16, bus: &Bus)-> OpcodeParameterBytes {
OpcodeParameterBytes(
bus.read(address),
bus.read(address.wrapping_add(1)),
bus.read(address.wrapping_add(2)),
bus.read(address.wrapping_add(3)),
)
}
pub fn parse_opcode(&self) -> (Opcode, Cycles) {
let opcode = self.0;
let two_byte_param = join_bytes(self.2, self.1);
match opcode {
0x06 => (Opcode::LD(OpcodeParameter::Register_U8(Register::B, self.1)), Cycles(1)),
0x0E => (Opcode::LD(OpcodeParameter::Register_U8(Register::C, self.1)), Cycles(3)),
0x16 => (Opcode::LD(OpcodeParameter::Register_U8(Register::D, self.1)), Cycles(2)),
0x1E => (Opcode::LD(OpcodeParameter::Register_U8(Register::E, self.1)), Cycles(2)),
0x26 => (Opcode::LD(OpcodeParameter::Register_U8(Register::H, self.1)), Cycles(2)),
0x2E => (Opcode::LD(OpcodeParameter::Register_U8(Register::L, self.1)), Cycles(2)),
0x7F => (Opcode::LD(OpcodeParameter::Register_Register(Register::A, Register::A)), Cycles(1)),
0x78 => (Opcode::LD(OpcodeParameter::Register_Register(Register::A, Register::B)), Cycles(1)),
0x79 => (Opcode::LD(OpcodeParameter::Register_Register(Register::A, Register::C)), Cycles(1)),
0x7A => (Opcode::LD(OpcodeParameter::Register_Register(Register::A, Register::D)), Cycles(1)),
0x7B => (Opcode::LD(OpcodeParameter::Register_Register(Register::A, Register::E)), Cycles(1)),
0x7C => (Opcode::LD(OpcodeParameter::Register_Register(Register::A, Register::H)), Cycles(1)),
0x7D => (Opcode::LD(OpcodeParameter::Register_Register(Register::A, Register::L)), Cycles(1)),
0x7E => (Opcode::LD(OpcodeParameter::Register_Register(Register::A, Register::HL)), Cycles(2)),
0x40 => (Opcode::LD(OpcodeParameter::Register_Register(Register::B, Register::B)), Cycles(1)),
0x41 => (Opcode::LD(OpcodeParameter::Register_Register(Register::B, Register::C)), Cycles(1)),
0x42 => (Opcode::LD(OpcodeParameter::Register_Register(Register::B, Register::D)), Cycles(1)),
0x43 => (Opcode::LD(OpcodeParameter::Register_Register(Register::B, Register::E)), Cycles(1)),
0x44 => (Opcode::LD(OpcodeParameter::Register_Register(Register::B, Register::H)), Cycles(1)),
0x45 => (Opcode::LD(OpcodeParameter::Register_Register(Register::B, Register::L)), Cycles(1)),
0x46 => (Opcode::LD(OpcodeParameter::Register_Register(Register::B, Register::HL)), Cycles(2)),
0x48 => (Opcode::LD(OpcodeParameter::Register_Register(Register::C, Register::B)), Cycles(1)),
0x49 => (Opcode::LD(OpcodeParameter::Register_Register(Register::C, Register::C)), Cycles(1)),
0x4A => (Opcode::LD(OpcodeParameter::Register_Register(Register::C, Register::D)), Cycles(1)),
0x4B => (Opcode::LD(OpcodeParameter::Register_Register(Register::C, Register::E)), Cycles(1)),
0x4C => (Opcode::LD(OpcodeParameter::Register_Register(Register::C, Register::H)), Cycles(1)),
0x4D => (Opcode::LD(OpcodeParameter::Register_Register(Register::C, Register::L)), Cycles(1)),
0x4E => (Opcode::LD(OpcodeParameter::Register_Register(Register::C, Register::HL)), Cycles(2)),
0x50 => (Opcode::LD(OpcodeParameter::Register_Register(Register::D, Register::B)), Cycles(1)),
0x51 => (Opcode::LD(OpcodeParameter::Register_Register(Register::D, Register::C)), Cycles(1)),
0x52 => (Opcode::LD(OpcodeParameter::Register_Register(Register::D, Register::D)), Cycles(1)),
0x53 => (Opcode::LD(OpcodeParameter::Register_Register(Register::D, Register::E)), Cycles(1)),
0x54 => (Opcode::LD(OpcodeParameter::Register_Register(Register::D, Register::H)), Cycles(1)),
0x55 => (Opcode::LD(OpcodeParameter::Register_Register(Register::D, Register::L)), Cycles(1)),
0x56 => (Opcode::LD(OpcodeParameter::Register_Register(Register::D, Register::HL)), Cycles(2)),
0x58 => (Opcode::LD(OpcodeParameter::Register_Register(Register::E, Register::B)), Cycles(1)),
0x59 => (Opcode::LD(OpcodeParameter::Register_Register(Register::E, Register::C)), Cycles(1)),
0x5A => (Opcode::LD(OpcodeParameter::Register_Register(Register::E, Register::D)), Cycles(1)),
0x5B => (Opcode::LD(OpcodeParameter::Register_Register(Register::E, Register::E)), Cycles(1)),
0x5C => (Opcode::LD(OpcodeParameter::Register_Register(Register::E, Register::H)), Cycles(1)),
0x5D => (Opcode::LD(OpcodeParameter::Register_Register(Register::E, Register::L)), Cycles(1)),
0x5E => (Opcode::LD(OpcodeParameter::Register_Register(Register::E, Register::HL)), Cycles(2)),
0x60 => (Opcode::LD(OpcodeParameter::Register_Register(Register::H, Register::B)), Cycles(1)),
0x61 => (Opcode::LD(OpcodeParameter::Register_Register(Register::H, Register::C)), Cycles(1)),
0x62 => (Opcode::LD(OpcodeParameter::Register_Register(Register::H, Register::D)), Cycles(1)),
0x63 => (Opcode::LD(OpcodeParameter::Register_Register(Register::H, Register::E)), Cycles(1)),
0x64 => (Opcode::LD(OpcodeParameter::Register_Register(Register::H, Register::H)), Cycles(1)),
0x65 => (Opcode::LD(OpcodeParameter::Register_Register(Register::H, Register::L)), Cycles(1)),
0x66 => (Opcode::LD(OpcodeParameter::Register_Register(Register::H, Register::HL)), Cycles(2)),
0x68 => (Opcode::LD(OpcodeParameter::Register_Register(Register::L, Register::B)), Cycles(1)),
0x69 => (Opcode::LD(OpcodeParameter::Register_Register(Register::L, Register::C)), Cycles(1)),
0x6A => (Opcode::LD(OpcodeParameter::Register_Register(Register::L, Register::D)), Cycles(1)),
0x6B => (Opcode::LD(OpcodeParameter::Register_Register(Register::L, Register::E)), Cycles(1)),
0x6C => (Opcode::LD(OpcodeParameter::Register_Register(Register::L, Register::H)), Cycles(1)),
0x6D => (Opcode::LD(OpcodeParameter::Register_Register(Register::L, Register::L)), Cycles(1)),
0x6E => (Opcode::LD(OpcodeParameter::Register_Register(Register::L, Register::HL)), Cycles(2)),
0x70 => (Opcode::LD(OpcodeParameter::Register_Register(Register::HL, Register::B)), Cycles(2)),
0x71 => (Opcode::LD(OpcodeParameter::Register_Register(Register::HL, Register::C)), Cycles(2)),
0x72 => (Opcode::LD(OpcodeParameter::Register_Register(Register::HL, Register::D)), Cycles(2)),
0x73 => (Opcode::LD(OpcodeParameter::Register_Register(Register::HL, Register::E)), Cycles(2)),
0x74 => (Opcode::LD(OpcodeParameter::Register_Register(Register::HL, Register::H)), Cycles(2)),
0x75 => (Opcode::LD(OpcodeParameter::Register_Register(Register::HL, Register::L)), Cycles(2)),
0x47 => (Opcode::LD(OpcodeParameter::Register_Register(Register::B, Register::A)), Cycles(1)),
0x4F => (Opcode::LD(OpcodeParameter::Register_Register(Register::C, Register::A)), Cycles(1)),
0x57 => (Opcode::LD(OpcodeParameter::Register_Register(Register::D, Register::A)), Cycles(1)),
0x5F => (Opcode::LD(OpcodeParameter::Register_Register(Register::E, Register::A)), Cycles(1)),
0x67 => (Opcode::LD(OpcodeParameter::Register_Register(Register::H, Register::A)), Cycles(1)),
0x6F => (Opcode::LD(OpcodeParameter::Register_Register(Register::L, Register::A)), Cycles(1)),
0x02 => (Opcode::LD(OpcodeParameter::Register_Register(Register::BC, Register::A)), Cycles(2)),
0x12 => (Opcode::LD(OpcodeParameter::Register_Register(Register::DE, Register::A)), Cycles(2)),
0x77 => (Opcode::LD(OpcodeParameter::Register_Register(Register::HL, Register::A)), Cycles(2)),
0x36 => (Opcode::LD(OpcodeParameter::Register_U8(Register::HL, self.1)), Cycles(3)),
0x0A => (Opcode::LD(OpcodeParameter::Register_Register(Register::A, Register::BC)), Cycles(2)),
0x1A => (Opcode::LD(OpcodeParameter::Register_Register(Register::A, Register::DE)), Cycles(2)),
0xFA => (Opcode::LD(OpcodeParameter::Register_U16(Register::A, two_byte_param)), Cycles(4)),
0x3E => (Opcode::LD(OpcodeParameter::Register_U8(Register::A, self.1)), Cycles(2)),
0xEA => (Opcode::LD(OpcodeParameter::U16_Register(two_byte_param, Register::A)), Cycles(4)),
0xF2 => (Opcode::LD(OpcodeParameter::Register_FF00plusRegister(Register::A, Register::C)), Cycles(2)),
0xE2 => (Opcode::LD(OpcodeParameter::FF00plusRegister_Register(Register::C, Register::A)), Cycles(2)),
0x3A => (Opcode::LDD(OpcodeParameter::Register_RegisterDecrement(Register::A, Register::HL)), Cycles(2)),
0x32 => (Opcode::LDD(OpcodeParameter::RegisterDecrement_Register(Register::HL, Register::A)), Cycles(2)),
0x2A => (Opcode::LDI(OpcodeParameter::Register_RegisterIncrement(Register::A, Register::HL)), Cycles(2)),
0x22 => (Opcode::LDI(OpcodeParameter::RegisterIncrement_Register(Register::HL, Register::A)), Cycles(2)),
0xE0 => (Opcode::LD(OpcodeParameter::FF00plusU8_Register(self.1, Register::A)), Cycles(3)),
0xF0 => (Opcode::LD(OpcodeParameter::Register_FF00plusU8(Register::A, self.1)), Cycles(3)),
0x01 => (Opcode::LD(OpcodeParameter::Register_U16(Register::BC, two_byte_param)), Cycles(3)),
0x11 => (Opcode::LD(OpcodeParameter::Register_U16(Register::DE, two_byte_param)), Cycles(3)),
0x21 => (Opcode::LD(OpcodeParameter::Register_U16(Register::HL, two_byte_param)), Cycles(3)),
0x31 => (Opcode::LD(OpcodeParameter::Register_U16(Register::SP, two_byte_param)), Cycles(3)),
0xF9 => (Opcode::LD(OpcodeParameter::Register_Register(Register::SP, Register::HL)), Cycles(2)),
0xF8 => (Opcode::LD(OpcodeParameter::Register_RegisterPlusI8(Register::HL, Register::SP, self.1 as i8)), Cycles(3)),
0x08 => (Opcode::LD(OpcodeParameter::U16_Register(two_byte_param, Register::SP)), Cycles(5)),
0xC5 => (Opcode::PUSH(Register::BC), Cycles(4)),
0xD5 => (Opcode::PUSH(Register::DE), Cycles(4)),
0xE5 => (Opcode::PUSH(Register::HL), Cycles(4)),
0xF5 => (Opcode::PUSH(Register::AF), Cycles(4)),
0xC1 => (Opcode::POP(Register::BC), Cycles(3)),
0xD1 => (Opcode::POP(Register::DE), Cycles(3)),
0xE1 => (Opcode::POP(Register::HL), Cycles(3)),
0xF1 => (Opcode::POP(Register::AF), Cycles(3)),
0x87 => (Opcode::ADD(OpcodeParameter::Register_Register(Register::A, Register::A)), Cycles(1)),
0x80 => (Opcode::ADD(OpcodeParameter::Register_Register(Register::A, Register::B)), Cycles(1)),
0x81 => (Opcode::ADD(OpcodeParameter::Register_Register(Register::A, Register::C)), Cycles(1)),
0x82 => (Opcode::ADD(OpcodeParameter::Register_Register(Register::A, Register::D)), Cycles(1)),
0x83 => (Opcode::ADD(OpcodeParameter::Register_Register(Register::A, Register::E)), Cycles(1)),
0x84 => (Opcode::ADD(OpcodeParameter::Register_Register(Register::A, Register::H)), Cycles(1)),
0x85 => (Opcode::ADD(OpcodeParameter::Register_Register(Register::A, Register::L)), Cycles(1)),
0x86 => (Opcode::ADD(OpcodeParameter::Register_Register(Register::A, Register::HL)), Cycles(2)),
0xC6 => (Opcode::ADD(OpcodeParameter::Register_U8(Register::A, self.1)), Cycles(2)),
0x09 => (Opcode::ADD(OpcodeParameter::Register_Register(Register::HL, Register::BC)), Cycles(2)),
0x19 => (Opcode::ADD(OpcodeParameter::Register_Register(Register::HL, Register::DE)), Cycles(2)),
0x29 => (Opcode::ADD(OpcodeParameter::Register_Register(Register::HL, Register::HL)), Cycles(2)),
0x39 => (Opcode::ADD(OpcodeParameter::Register_Register(Register::HL, Register::SP)), Cycles(2)),
0xE8 => (Opcode::ADD(OpcodeParameter::Register_I8(Register::SP, self.1 as i8)), Cycles(4)),
0x8F => (Opcode::ADC(OpcodeParameter::Register_Register(Register::A, Register::A)), Cycles(1)),
0x88 => (Opcode::ADC(OpcodeParameter::Register_Register(Register::A, Register::B)), Cycles(1)),
0x89 => (Opcode::ADC(OpcodeParameter::Register_Register(Register::A, Register::C)), Cycles(1)),
0x8A => (Opcode::ADC(OpcodeParameter::Register_Register(Register::A, Register::D)), Cycles(1)),
0x8B => (Opcode::ADC(OpcodeParameter::Register_Register(Register::A, Register::E)), Cycles(1)),
0x8C => (Opcode::ADC(OpcodeParameter::Register_Register(Register::A, Register::H)), Cycles(1)),
0x8D => (Opcode::ADC(OpcodeParameter::Register_Register(Register::A, Register::L)), Cycles(1)),
0x8E => (Opcode::ADC(OpcodeParameter::Register_Register(Register::A, Register::HL)), Cycles(2)),
0xCE => (Opcode::ADC(OpcodeParameter::Register_U8(Register::A, self.1)), Cycles(2)),
0x97 => (Opcode::SUB(OpcodeParameter::Register_Register(Register::A, Register::A)), Cycles(1)),
0x90 => (Opcode::SUB(OpcodeParameter::Register_Register(Register::A, Register::B)), Cycles(1)),
0x91 => (Opcode::SUB(OpcodeParameter::Register_Register(Register::A, Register::C)), Cycles(1)),
0x92 => (Opcode::SUB(OpcodeParameter::Register_Register(Register::A, Register::D)), Cycles(1)),
0x93 => (Opcode::SUB(OpcodeParameter::Register_Register(Register::A, Register::E)), Cycles(1)),
0x94 => (Opcode::SUB(OpcodeParameter::Register_Register(Register::A, Register::H)), Cycles(1)),
0x95 => (Opcode::SUB(OpcodeParameter::Register_Register(Register::A, Register::L)), Cycles(1)),
0x96 => (Opcode::SUB(OpcodeParameter::Register_Register(Register::A, Register::HL)), Cycles(2)),
0xD6 => (Opcode::SUB(OpcodeParameter::Register_U8(Register::A, self.1)), Cycles(2)),
0x9F => (Opcode::SBC(OpcodeParameter::Register_Register(Register::A, Register::A)), Cycles(1)),
0x98 => (Opcode::SBC(OpcodeParameter::Register_Register(Register::A, Register::B)), Cycles(1)),
0x99 => (Opcode::SBC(OpcodeParameter::Register_Register(Register::A, Register::C)), Cycles(1)),
0x9A => (Opcode::SBC(OpcodeParameter::Register_Register(Register::A, Register::D)), Cycles(1)),
0x9B => (Opcode::SBC(OpcodeParameter::Register_Register(Register::A, Register::E)), Cycles(1)),
0x9C => (Opcode::SBC(OpcodeParameter::Register_Register(Register::A, Register::H)), Cycles(1)),
0x9D => (Opcode::SBC(OpcodeParameter::Register_Register(Register::A, Register::L)), Cycles(1)),
0x9E => (Opcode::SBC(OpcodeParameter::Register_Register(Register::A, Register::HL)), Cycles(2)),
0xDE => (Opcode::SBC(OpcodeParameter::Register_U8(Register::A, self.1)), Cycles(2)),
0xA7 => (Opcode::AND(OpcodeParameter::Register_Register(Register::A, Register::A)), Cycles(1)),
0xA0 => (Opcode::AND(OpcodeParameter::Register_Register(Register::A, Register::B)), Cycles(1)),
0xA1 => (Opcode::AND(OpcodeParameter::Register_Register(Register::A, Register::C)), Cycles(1)),
0xA2 => (Opcode::AND(OpcodeParameter::Register_Register(Register::A, Register::D)), Cycles(1)),
0xA3 => (Opcode::AND(OpcodeParameter::Register_Register(Register::A, Register::E)), Cycles(1)),
0xA4 => (Opcode::AND(OpcodeParameter::Register_Register(Register::A, Register::H)), Cycles(1)),
0xA5 => (Opcode::AND(OpcodeParameter::Register_Register(Register::A, Register::L)), Cycles(1)),
0xA6 => (Opcode::AND(OpcodeParameter::Register_Register(Register::A, Register::HL)), Cycles(2)),
0xE6 => (Opcode::AND(OpcodeParameter::Register_U8(Register::A, self.1)), Cycles(2)),
0xB7 => (Opcode::OR(OpcodeParameter::Register_Register(Register::A, Register::A)), Cycles(1)),
0xB0 => (Opcode::OR(OpcodeParameter::Register_Register(Register::A, Register::B)), Cycles(1)),
0xB1 => (Opcode::OR(OpcodeParameter::Register_Register(Register::A, Register::C)), Cycles(1)),
0xB2 => (Opcode::OR(OpcodeParameter::Register_Register(Register::A, Register::D)), Cycles(1)),
0xB3 => (Opcode::OR(OpcodeParameter::Register_Register(Register::A, Register::E)), Cycles(1)),
0xB4 => (Opcode::OR(OpcodeParameter::Register_Register(Register::A, Register::H)), Cycles(1)),
0xB5 => (Opcode::OR(OpcodeParameter::Register_Register(Register::A, Register::L)), Cycles(1)),
0xB6 => (Opcode::OR(OpcodeParameter::Register_Register(Register::A, Register::HL)), Cycles(2)),
0xF6 => (Opcode::OR(OpcodeParameter::Register_U8(Register::A, self.1)), Cycles(2)),
0xAF => (Opcode::XOR(OpcodeParameter::Register_Register(Register::A, Register::A)), Cycles(1)),
0xA8 => (Opcode::XOR(OpcodeParameter::Register_Register(Register::A, Register::B)), Cycles(1)),
0xA9 => (Opcode::XOR(OpcodeParameter::Register_Register(Register::A, Register::C)), Cycles(1)),
0xAA => (Opcode::XOR(OpcodeParameter::Register_Register(Register::A, Register::D)), Cycles(1)),
0xAB => (Opcode::XOR(OpcodeParameter::Register_Register(Register::A, Register::E)), Cycles(1)),
0xAC => (Opcode::XOR(OpcodeParameter::Register_Register(Register::A, Register::H)), Cycles(1)),
0xAD => (Opcode::XOR(OpcodeParameter::Register_Register(Register::A, Register::L)), Cycles(1)),
0xAE => (Opcode::XOR(OpcodeParameter::Register_Register(Register::A, Register::HL)), Cycles(2)),
0xEE => (Opcode::XOR(OpcodeParameter::Register_U8(Register::A, self.1)), Cycles(2)),
0xBF => (Opcode::CP(OpcodeParameter::Register_Register(Register::A, Register::A)), Cycles(1)),
0xB8 => (Opcode::CP(OpcodeParameter::Register_Register(Register::A, Register::B)), Cycles(1)),
0xB9 => (Opcode::CP(OpcodeParameter::Register_Register(Register::A, Register::C)), Cycles(1)),
0xBA => (Opcode::CP(OpcodeParameter::Register_Register(Register::A, Register::D)), Cycles(1)),
0xBB => (Opcode::CP(OpcodeParameter::Register_Register(Register::A, Register::E)), Cycles(1)),
0xBC => (Opcode::CP(OpcodeParameter::Register_Register(Register::A, Register::H)), Cycles(1)),
0xBD => (Opcode::CP(OpcodeParameter::Register_Register(Register::A, Register::L)), Cycles(1)),
0xBE => (Opcode::CP(OpcodeParameter::Register_Register(Register::A, Register::HL)), Cycles(2)),
0xFE => (Opcode::CP(OpcodeParameter::Register_U8(Register::A, self.1)), Cycles(2)),
0x3C => (Opcode::INC(true, false, Register::A), Cycles(1)),
0x04 => (Opcode::INC(true, false, Register::B), Cycles(1)),
0x0C => (Opcode::INC(true, false, Register::C), Cycles(1)),
0x14 => (Opcode::INC(true, false, Register::D), Cycles(1)),
0x1C => (Opcode::INC(true, false, Register::E), Cycles(1)),
0x24 => (Opcode::INC(true, false, Register::H), Cycles(1)),
0x2C => (Opcode::INC(true, false, Register::L), Cycles(1)),
0x34 => (Opcode::INC(true, true, Register::HL), Cycles(3)),
0x03 => (Opcode::INC(false, false, Register::BC), Cycles(2)),
0x13 => (Opcode::INC(false, false, Register::DE), Cycles(2)),
0x23 => (Opcode::INC(false, false, Register::HL), Cycles(2)),
0x33 => (Opcode::INC(false, false, Register::SP), Cycles(2)),
0x3D => (Opcode::DEC(true, false, Register::A), Cycles(1)),
0x05 => (Opcode::DEC(true, false, Register::B), Cycles(1)),
0x0D => (Opcode::DEC(true, false, Register::C), Cycles(1)),
0x15 => (Opcode::DEC(true, false, Register::D), Cycles(1)),
0x1D => (Opcode::DEC(true, false, Register::E), Cycles(1)),
0x25 => (Opcode::DEC(true, false, Register::H), Cycles(1)),
0x2D => (Opcode::DEC(true, false, Register::L), Cycles(1)),
0x35 => (Opcode::DEC(true, true, Register::HL), Cycles(3)),
0x0B => (Opcode::DEC(false, false, Register::BC), Cycles(2)),
0x1B => (Opcode::DEC(false, false, Register::DE), Cycles(2)),
0x2B => (Opcode::DEC(false, false, Register::HL), Cycles(2)),
0x3B => (Opcode::DEC(false, false, Register::SP), Cycles(2)),
0x27 => (Opcode::DAA, Cycles(1)),
0x2F => (Opcode::CPL, Cycles(1)),
0x3F => (Opcode::CCF, Cycles(1)),
0x37 => (Opcode::SCF, Cycles(1)),
0x17 => (Opcode::RLA, Cycles(1)),
0x07 => (Opcode::RLCA, Cycles(1)),
0x0F => (Opcode::RRCA, Cycles(1)),
0x1F => (Opcode::RRA, Cycles(1)),
0xCB => match self.1 {
0x00 => (Opcode::PrefixCB(Box::new(Opcode::RLC(Register::B))), Cycles(2)),
0x01 => (Opcode::PrefixCB(Box::new(Opcode::RLC(Register::C))), Cycles(2)),
0x02 => (Opcode::PrefixCB(Box::new(Opcode::RLC(Register::D))), Cycles(2)),
0x03 => (Opcode::PrefixCB(Box::new(Opcode::RLC(Register::E))), Cycles(2)),
0x04 => (Opcode::PrefixCB(Box::new(Opcode::RLC(Register::H))), Cycles(2)),
0x05 => (Opcode::PrefixCB(Box::new(Opcode::RLC(Register::L))), Cycles(2)),
0x06 => (Opcode::PrefixCB(Box::new(Opcode::RLC(Register::HL))), Cycles(4)),
0x07 => (Opcode::PrefixCB(Box::new(Opcode::RLC(Register::A))), Cycles(2)),
0x08 => (Opcode::PrefixCB(Box::new(Opcode::RRC(Register::B))), Cycles(2)),
0x09 => (Opcode::PrefixCB(Box::new(Opcode::RRC(Register::C))), Cycles(2)),
0x0A => (Opcode::PrefixCB(Box::new(Opcode::RRC(Register::D))), Cycles(2)),
0x0B => (Opcode::PrefixCB(Box::new(Opcode::RRC(Register::E))), Cycles(2)),
0x0C => (Opcode::PrefixCB(Box::new(Opcode::RRC(Register::H))), Cycles(2)),
0x0D => (Opcode::PrefixCB(Box::new(Opcode::RRC(Register::L))), Cycles(2)),
0x0E => (Opcode::PrefixCB(Box::new(Opcode::RRC(Register::HL))), Cycles(4)),
0x0F => (Opcode::PrefixCB(Box::new(Opcode::RRC(Register::A))), Cycles(2)),
0x10 => (Opcode::PrefixCB(Box::new(Opcode::RL(Register::B))), Cycles(2)),
0x11 => (Opcode::PrefixCB(Box::new(Opcode::RL(Register::C))), Cycles(2)),
0x12 => (Opcode::PrefixCB(Box::new(Opcode::RL(Register::D))), Cycles(2)),
0x13 => (Opcode::PrefixCB(Box::new(Opcode::RL(Register::E))), Cycles(2)),
0x14 => (Opcode::PrefixCB(Box::new(Opcode::RL(Register::H))), Cycles(2)),
0x15 => (Opcode::PrefixCB(Box::new(Opcode::RL(Register::L))), Cycles(2)),
0x16 => (Opcode::PrefixCB(Box::new(Opcode::RL(Register::HL))), Cycles(4)),
0x17 => (Opcode::PrefixCB(Box::new(Opcode::RL(Register::A))), Cycles(2)),
0x18 => (Opcode::PrefixCB(Box::new(Opcode::RR(Register::B))), Cycles(2)),
0x19 => (Opcode::PrefixCB(Box::new(Opcode::RR(Register::C))), Cycles(2)),
0x1A => (Opcode::PrefixCB(Box::new(Opcode::RR(Register::D))), Cycles(2)),
0x1B => (Opcode::PrefixCB(Box::new(Opcode::RR(Register::E))), Cycles(2)),
0x1C => (Opcode::PrefixCB(Box::new(Opcode::RR(Register::H))), Cycles(2)),
0x1D => (Opcode::PrefixCB(Box::new(Opcode::RR(Register::L))), Cycles(2)),
0x1E => (Opcode::PrefixCB(Box::new(Opcode::RR(Register::HL))), Cycles(2)),
0x1F => (Opcode::PrefixCB(Box::new(Opcode::RR(Register::A))), Cycles(2)),
0x20 => (Opcode::PrefixCB(Box::new(Opcode::SLA(Register::B))), Cycles(2)),
0x21 => (Opcode::PrefixCB(Box::new(Opcode::SLA(Register::C))), Cycles(2)),
0x22 => (Opcode::PrefixCB(Box::new(Opcode::SLA(Register::D))), Cycles(2)),
0x23 => (Opcode::PrefixCB(Box::new(Opcode::SLA(Register::E))), Cycles(2)),
0x24 => (Opcode::PrefixCB(Box::new(Opcode::SLA(Register::H))), Cycles(2)),
0x25 => (Opcode::PrefixCB(Box::new(Opcode::SLA(Register::L))), Cycles(2)),
0x26 => (Opcode::PrefixCB(Box::new(Opcode::SLA(Register::HL))), Cycles(4)),
0x27 => (Opcode::PrefixCB(Box::new(Opcode::SLA(Register::A))), Cycles(2)),
0x28 => (Opcode::PrefixCB(Box::new(Opcode::SRA(Register::B))), Cycles(2)),
0x29 => (Opcode::PrefixCB(Box::new(Opcode::SRA(Register::C))), Cycles(2)),
0x2A => (Opcode::PrefixCB(Box::new(Opcode::SRA(Register::D))), Cycles(2)),
0x2B => (Opcode::PrefixCB(Box::new(Opcode::SRA(Register::E))), Cycles(2)),
0x2C => (Opcode::PrefixCB(Box::new(Opcode::SRA(Register::H))), Cycles(2)),
0x2D => (Opcode::PrefixCB(Box::new(Opcode::SRA(Register::L))), Cycles(2)),
0x2E => (Opcode::PrefixCB(Box::new(Opcode::SRA(Register::HL))), Cycles(4)),
0x2F => (Opcode::PrefixCB(Box::new(Opcode::SRA(Register::A))), Cycles(2)),
0x30 => (Opcode::PrefixCB(Box::new(Opcode::SWAP(Register::B))), Cycles(2)),
0x31 => (Opcode::PrefixCB(Box::new(Opcode::SWAP(Register::C))), Cycles(2)),
0x32 => (Opcode::PrefixCB(Box::new(Opcode::SWAP(Register::D))), Cycles(2)),
0x33 => (Opcode::PrefixCB(Box::new(Opcode::SWAP(Register::E))), Cycles(2)),
0x34 => (Opcode::PrefixCB(Box::new(Opcode::SWAP(Register::H))), Cycles(2)),
0x35 => (Opcode::PrefixCB(Box::new(Opcode::SWAP(Register::L))), Cycles(2)),
0x36 => (Opcode::PrefixCB(Box::new(Opcode::SWAP(Register::HL))), Cycles(4)),
0x37 => (Opcode::PrefixCB(Box::new(Opcode::SWAP(Register::A))), Cycles(2)),
0x38 => (Opcode::PrefixCB(Box::new(Opcode::SRL(Register::B))), Cycles(2)),
0x39 => (Opcode::PrefixCB(Box::new(Opcode::SRL(Register::C))), Cycles(2)),
0x3A => (Opcode::PrefixCB(Box::new(Opcode::SRL(Register::D))), Cycles(2)),
0x3B => (Opcode::PrefixCB(Box::new(Opcode::SRL(Register::E))), Cycles(2)),
0x3C => (Opcode::PrefixCB(Box::new(Opcode::SRL(Register::H))), Cycles(2)),
0x3D => (Opcode::PrefixCB(Box::new(Opcode::SRL(Register::L))), Cycles(2)),
0x3E => (Opcode::PrefixCB(Box::new(Opcode::SRL(Register::HL))), Cycles(4)),
0x3F => (Opcode::PrefixCB(Box::new(Opcode::SRL(Register::A))), Cycles(2)),
0x40 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I0, Register::B))), Cycles(2)),
0x41 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I0, Register::C))), Cycles(2)),
0x42 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I0, Register::D))), Cycles(2)),
0x43 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I0, Register::E))), Cycles(2)),
0x44 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I0, Register::H))), Cycles(2)),
0x45 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I0, Register::L))), Cycles(2)),
0x46 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I0, Register::HL))), Cycles(3)),
0x47 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I0, Register::A))), Cycles(2)),
0x48 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I1, Register::B))), Cycles(2)),
0x49 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I1, Register::C))), Cycles(2)),
0x4A => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I1, Register::D))), Cycles(2)),
0x4B => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I1, Register::E))), Cycles(2)),
0x4C => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I1, Register::H))), Cycles(2)),
0x4D => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I1, Register::L))), Cycles(2)),
0x4E => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I1, Register::HL))), Cycles(3)),
0x4F => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I1, Register::A))), Cycles(2)),
0x50 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I2, Register::B))), Cycles(2)),
0x51 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I2, Register::C))), Cycles(2)),
0x52 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I2, Register::D))), Cycles(2)),
0x53 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I2, Register::E))), Cycles(2)),
0x54 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I2, Register::H))), Cycles(2)),
0x55 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I2, Register::L))), Cycles(2)),
0x56 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I2, Register::HL))), Cycles(3)),
0x57 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I2, Register::A))), Cycles(2)),
0x58 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I3, Register::B))), Cycles(2)),
0x59 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I3, Register::C))), Cycles(2)),
0x5A => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I3, Register::D))), Cycles(2)),
0x5B => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I3, Register::E))), Cycles(2)),
0x5C => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I3, Register::H))), Cycles(2)),
0x5D => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I3, Register::L))), Cycles(2)),
0x5E => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I3, Register::HL))), Cycles(3)),
0x5F => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I3, Register::A))), Cycles(2)),
0x60 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I4, Register::B))), Cycles(2)),
0x61 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I4, Register::C))), Cycles(2)),
0x62 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I4, Register::D))), Cycles(2)),
0x63 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I4, Register::E))), Cycles(2)),
0x64 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I4, Register::H))), Cycles(2)),
0x65 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I4, Register::L))), Cycles(2)),
0x66 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I4, Register::HL))), Cycles(3)),
0x67 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I4, Register::A))), Cycles(2)),
0x68 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I5, Register::B))), Cycles(2)),
0x69 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I5, Register::C))), Cycles(2)),
0x6A => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I5, Register::D))), Cycles(2)),
0x6B => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I5, Register::E))), Cycles(2)),
0x6C => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I5, Register::H))), Cycles(2)),
0x6D => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I5, Register::L))), Cycles(2)),
0x6E => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I5, Register::HL))), Cycles(3)),
0x6F => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I5, Register::A))), Cycles(2)),
0x70 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I6, Register::B))), Cycles(2)),
0x71 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I6, Register::C))), Cycles(2)),
0x72 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I6, Register::D))), Cycles(2)),
0x73 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I6, Register::E))), Cycles(2)),
0x74 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I6, Register::H))), Cycles(2)),
0x75 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I6, Register::L))), Cycles(2)),
0x76 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I6, Register::HL))), Cycles(3)),
0x77 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I6, Register::A))), Cycles(2)),
0x78 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I7, Register::B))), Cycles(2)),
0x79 => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I7, Register::C))), Cycles(2)),
0x7A => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I7, Register::D))), Cycles(2)),
0x7B => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I7, Register::E))), Cycles(2)),
0x7C => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I7, Register::H))), Cycles(2)),
0x7D => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I7, Register::L))), Cycles(2)),
0x7E => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I7, Register::HL))), Cycles(3)),
0x7F => (Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I7, Register::A))), Cycles(2)),
0x80 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I0, Register::B))), Cycles(2)),
0x81 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I0, Register::C))), Cycles(2)),
0x82 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I0, Register::D))), Cycles(2)),
0x83 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I0, Register::E))), Cycles(2)),
0x84 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I0, Register::H))), Cycles(2)),
0x85 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I0, Register::L))), Cycles(2)),
0x86 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I0, Register::HL))), Cycles(4)),
0x87 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I0, Register::A))), Cycles(2)),
0x88 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I1, Register::B))), Cycles(2)),
0x89 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I1, Register::C))), Cycles(2)),
0x8A => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I1, Register::D))), Cycles(2)),
0x8B => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I1, Register::E))), Cycles(2)),
0x8C => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I1, Register::H))), Cycles(2)),
0x8D => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I1, Register::L))), Cycles(2)),
0x8E => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I1, Register::HL))), Cycles(4)),
0x8F => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I1, Register::A))), Cycles(2)),
0x90 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I2, Register::B))), Cycles(2)),
0x91 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I2, Register::C))), Cycles(2)),
0x92 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I2, Register::D))), Cycles(2)),
0x93 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I2, Register::E))), Cycles(2)),
0x94 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I2, Register::H))), Cycles(2)),
0x95 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I2, Register::L))), Cycles(2)),
0x96 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I2, Register::HL))), Cycles(4)),
0x97 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I2, Register::A))), Cycles(2)),
0x98 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I3, Register::B))), Cycles(2)),
0x99 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I3, Register::C))), Cycles(2)),
0x9A => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I3, Register::D))), Cycles(2)),
0x9B => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I3, Register::E))), Cycles(2)),
0x9C => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I3, Register::H))), Cycles(2)),
0x9D => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I3, Register::L))), Cycles(2)),
0x9E => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I3, Register::HL))), Cycles(4)),
0x9F => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I3, Register::A))), Cycles(2)),
0xA0 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I4, Register::B))), Cycles(2)),
0xA1 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I4, Register::C))), Cycles(2)),
0xA2 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I4, Register::D))), Cycles(2)),
0xA3 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I4, Register::E))), Cycles(2)),
0xA4 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I4, Register::H))), Cycles(2)),
0xA5 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I4, Register::L))), Cycles(2)),
0xA6 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I4, Register::HL))), Cycles(4)),
0xA7 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I4, Register::A))), Cycles(2)),
0xA8 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I5, Register::B))), Cycles(2)),
0xA9 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I5, Register::C))), Cycles(2)),
0xAA => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I5, Register::D))), Cycles(2)),
0xAB => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I5, Register::E))), Cycles(2)),
0xAC => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I5, Register::H))), Cycles(2)),
0xAD => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I5, Register::L))), Cycles(2)),
0xAE => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I5, Register::HL))), Cycles(4)),
0xAF => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I5, Register::A))), Cycles(2)),
0xB0 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I6, Register::B))), Cycles(2)),
0xB1 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I6, Register::C))), Cycles(2)),
0xB2 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I6, Register::D))), Cycles(2)),
0xB3 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I6, Register::E))), Cycles(2)),
0xB4 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I6, Register::H))), Cycles(2)),
0xB5 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I6, Register::L))), Cycles(2)),
0xB6 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I6, Register::HL))), Cycles(4)),
0xB7 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I6, Register::A))), Cycles(2)),
0xB8 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I7, Register::B))), Cycles(2)),
0xB9 => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I7, Register::C))), Cycles(2)),
0xBA => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I7, Register::D))), Cycles(2)),
0xBB => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I7, Register::E))), Cycles(2)),
0xBC => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I7, Register::H))), Cycles(2)),
0xBD => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I7, Register::L))), Cycles(2)),
0xBE => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I7, Register::HL))), Cycles(4)),
0xBF => (Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I7, Register::A))), Cycles(2)),
0xC0 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I0, Register::B))), Cycles(2)),
0xC1 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I0, Register::C))), Cycles(2)),
0xC2 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I0, Register::D))), Cycles(2)),
0xC3 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I0, Register::E))), Cycles(2)),
0xC4 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I0, Register::H))), Cycles(2)),
0xC5 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I0, Register::L))), Cycles(2)),
0xC6 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I0, Register::HL))), Cycles(4)),
0xC7 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I0, Register::A))), Cycles(2)),
0xC8 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I1, Register::B))), Cycles(2)),
0xC9 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I1, Register::C))), Cycles(2)),
0xCA => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I1, Register::D))), Cycles(2)),
0xCB => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I1, Register::E))), Cycles(2)),
0xCC => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I1, Register::H))), Cycles(2)),
0xCD => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I1, Register::L))), Cycles(2)),
0xCE => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I1, Register::HL))), Cycles(4)),
0xCF => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I1, Register::A))), Cycles(2)),
0xD0 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I2, Register::B))), Cycles(2)),
0xD1 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I2, Register::C))), Cycles(2)),
0xD2 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I2, Register::D))), Cycles(2)),
0xD3 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I2, Register::E))), Cycles(2)),
0xD4 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I2, Register::H))), Cycles(2)),
0xD5 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I2, Register::L))), Cycles(2)),
0xD6 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I2, Register::HL))), Cycles(4)),
0xD7 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I2, Register::A))), Cycles(2)),
0xD8 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I3, Register::B))), Cycles(2)),
0xD9 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I3, Register::C))), Cycles(2)),
0xDA => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I3, Register::D))), Cycles(2)),
0xDB => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I3, Register::E))), Cycles(2)),
0xDC => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I3, Register::H))), Cycles(2)),
0xDD => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I3, Register::L))), Cycles(2)),
0xDE => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I3, Register::HL))), Cycles(4)),
0xDF => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I3, Register::A))), Cycles(2)),
0xE0 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I4, Register::B))), Cycles(2)),
0xE1 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I4, Register::C))), Cycles(2)),
0xE2 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I4, Register::D))), Cycles(2)),
0xE3 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I4, Register::E))), Cycles(2)),
0xE4 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I4, Register::H))), Cycles(2)),
0xE5 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I4, Register::L))), Cycles(2)),
0xE6 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I4, Register::HL))), Cycles(4)),
0xE7 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I4, Register::A))), Cycles(2)),
0xE8 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I5, Register::B))), Cycles(2)),
0xE9 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I5, Register::C))), Cycles(2)),
0xEA => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I5, Register::D))), Cycles(2)),
0xEB => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I5, Register::E))), Cycles(2)),
0xEC => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I5, Register::H))), Cycles(2)),
0xED => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I5, Register::L))), Cycles(2)),
0xEE => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I5, Register::HL))), Cycles(4)),
0xEF => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I5, Register::A))), Cycles(2)),
0xF0 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I6, Register::B))), Cycles(2)),
0xF1 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I6, Register::C))), Cycles(2)),
0xF2 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I6, Register::D))), Cycles(2)),
0xF3 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I6, Register::E))), Cycles(2)),
0xF4 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I6, Register::H))), Cycles(2)),
0xF5 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I6, Register::L))), Cycles(2)),
0xF6 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I6, Register::HL))), Cycles(4)),
0xF7 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I6, Register::A))), Cycles(2)),
0xF8 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I7, Register::B))), Cycles(2)),
0xF9 => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I7, Register::C))), Cycles(2)),
0xFA => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I7, Register::D))), Cycles(2)),
0xFB => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I7, Register::E))), Cycles(2)),
0xFC => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I7, Register::H))), Cycles(2)),
0xFD => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I7, Register::L))), Cycles(2)),
0xFE => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I7, Register::HL))), Cycles(4)),
0xFF => (Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I7, Register::A))), Cycles(2)),
},
0xC3 => (Opcode::JP(OpcodeParameter::U16(two_byte_param)), Cycles(4)),
0xC2 => (Opcode::JP(OpcodeParameter::FlagRegisterReset_U16(FlagRegister::Zero, two_byte_param)), Cycles(3)),
0xCA => (Opcode::JP(OpcodeParameter::FlagRegisterSet_U16(FlagRegister::Zero, two_byte_param)), Cycles(3)),
0xD2 => (Opcode::JP(OpcodeParameter::FlagRegisterReset_U16(FlagRegister::Carry, two_byte_param)), Cycles(3)),
0xDA => (Opcode::JP(OpcodeParameter::FlagRegisterSet_U16(FlagRegister::Carry, two_byte_param)), Cycles(3)),
0xE9 => (Opcode::JP(OpcodeParameter::Register(Register::HL)), Cycles(1)),
0x18 => (Opcode::JR(OpcodeParameter::I8(self.1 as i8)), Cycles(3)),
0x20 => (Opcode::JR(OpcodeParameter::FlagRegisterReset_I8(FlagRegister::Zero, self.1 as i8)), Cycles(2)),
0x28 => (Opcode::JR(OpcodeParameter::FlagRegisterSet_I8(FlagRegister::Zero, self.1 as i8)), Cycles(2)),
0x30 => (Opcode::JR(OpcodeParameter::FlagRegisterReset_I8(FlagRegister::Carry, self.1 as i8)), Cycles(2)),
0x38 => (Opcode::JR(OpcodeParameter::FlagRegisterSet_I8(FlagRegister::Carry, self.1 as i8)), Cycles(2)),
0xCD => (Opcode::CALL(OpcodeParameter::U16(two_byte_param)), Cycles(6)),
0xC4 => (Opcode::CALL(OpcodeParameter::FlagRegisterReset_U16(FlagRegister::Zero, two_byte_param)), Cycles(3)),
0xCC => (Opcode::CALL(OpcodeParameter::FlagRegisterSet_U16(FlagRegister::Zero, two_byte_param)), Cycles(3)),
0xD4 => (Opcode::CALL(OpcodeParameter::FlagRegisterReset_U16(FlagRegister::Carry, two_byte_param)), Cycles(3)),
0xDC => (Opcode::CALL(OpcodeParameter::FlagRegisterSet_U16(FlagRegister::Carry, two_byte_param)), Cycles(3)),
0xC7 => (Opcode::RST(0x00), Cycles(4)),
0xCF => (Opcode::RST(0x08), Cycles(4)),
0xD7 => (Opcode::RST(0x10), Cycles(4)),
0xDF => (Opcode::RST(0x18), Cycles(4)),
0xE7 => (Opcode::RST(0x20), Cycles(4)),
0xEF => (Opcode::RST(0x28), Cycles(4)),
0xF7 => (Opcode::RST(0x30), Cycles(4)),
0xFF => (Opcode::RST(0x38), Cycles(4)),
0xC9 => (Opcode::RET(OpcodeParameter::NoParam), Cycles(4)),
0xC0 => (Opcode::RET(OpcodeParameter::FlagRegisterReset(FlagRegister::Zero)), Cycles(2)),
0xC8 => (Opcode::RET(OpcodeParameter::FlagRegisterSet(FlagRegister::Zero)), Cycles(2)),
0xD0 => (Opcode::RET(OpcodeParameter::FlagRegisterReset(FlagRegister::Carry)), Cycles(2)),
0xD8 => (Opcode::RET(OpcodeParameter::FlagRegisterSet(FlagRegister::Carry)), Cycles(2)),
0xD9 => (Opcode::RETI, Cycles(4)),
0xF3 => (Opcode::DI, Cycles(1)),
0xFB => (Opcode::EI, Cycles(1)),
0x76 => (Opcode::HALT, Cycles(1)),
0x10 => (Opcode::STOP, Cycles(1)),
0x00 => (Opcode::NOP, Cycles(1)),
_ => (Opcode::IllegalInstruction, Cycles(1)),
}
}
}
#[derive(Debug)]
pub enum Opcode {
LD(OpcodeParameter),
LDD(OpcodeParameter),
LDI(OpcodeParameter),
LDHL(OpcodeParameter),
PUSH(Register),
POP(Register),
ADD(OpcodeParameter),
ADC(OpcodeParameter),
SUB(OpcodeParameter),
SBC(OpcodeParameter),
AND(OpcodeParameter),
OR(OpcodeParameter),
XOR(OpcodeParameter),
CP(OpcodeParameter),
INC(bool, bool, Register),
DEC(bool, bool, Register),
DAA,
CPL,
CCF,
SCF,
NOP,
HALT,
STOP,
DI,
EI,
RLCA,
RLA,
RRCA,
RRA,
SWAP(Register),
RLC(Register),
RL(Register),
RRC(Register),
RR(Register),
SLA(Register),
SRA(Register),
SRL(Register),
BIT(BitIndex, Register),
SET(BitIndex, Register),
RES(BitIndex, Register),
JP(OpcodeParameter),
JR(OpcodeParameter),
CALL(OpcodeParameter),
RST(u8),
RET(OpcodeParameter),
RETI,
PrefixCB(Box<Opcode>),
IllegalInstruction,
}
// Store cycles in M
#[derive(Debug, Copy, Clone)]
pub struct Cycles(pub usize);
impl Cycles {
pub fn to_t(&self) -> Self {
Self(self.0 * 4)
}
}
pub struct CPU {
registers: Registers,
cycles: Cycles,
last_op_cycles: Cycles,
exec_calls_count: usize,
is_halted: bool,
ime: bool, // Interrupt Master Enable
ei_delay: bool,
enable_logs: bool,
}
impl CPU {
pub fn new() -> Self {
Self {
registers: Registers::new(),
cycles: Cycles(0),
last_op_cycles: Cycles(0),
exec_calls_count: 0,
is_halted: false,
ei_delay: false,
ime: true,
enable_logs: !env::var("CPU_LOG").is_err() || !env::var("CPU_LOGS").is_err(),
}
}
pub fn get_exec_calls_count(&self) -> usize {
self.exec_calls_count
}
fn increment_exec_calls_count(&mut self) {
self.exec_calls_count += 1;
}
fn increment_cycles(&mut self, cycles: Cycles) {
self.cycles.0 += cycles.0;
}
pub fn reset_cycles(&mut self) {
self.cycles = Cycles(0);
}
pub fn get_cycles(&mut self) -> Cycles {
self.cycles
}
pub fn set_last_op_cycles(&mut self, cycles_start: Cycles, cycles_end: Cycles) {
self.last_op_cycles = Cycles(cycles_end.0 - cycles_start.0);
}
pub fn get_last_op_cycles(&self) -> Cycles {
self.last_op_cycles
}
fn log(&self, parameter_bytes: OpcodeParameterBytes) {
println!("A: {:02X} F: {:02X} B: {:02X} C: {:02X} D: {:02X} E: {:02X} H: {:02X} L: {:02X} SP: {:04X} PC: 00:{:04X} ({:02X} {:02X} {:02X} {:02X})",
self.registers.get(Register::A),
self.registers.get(Register::F),
self.registers.get(Register::B),
self.registers.get(Register::C),
self.registers.get(Register::D),
self.registers.get(Register::E),
self.registers.get(Register::H),
self.registers.get(Register::L),
self.registers.get(Register::SP),
self.registers.get(Register::PC),
parameter_bytes.0,
parameter_bytes.1,
parameter_bytes.2,
parameter_bytes.3,
);
}
pub fn handle_interrupt(&mut self, bus: &mut Bus, interrupt: Interrupt) {
// println!("Interrupt: {:?}", interrupt);
bus.set_interrupt_flag(interrupt, false);
self.ime = false;
self.registers.decrement(Register::PC, 3);
self.exec(Opcode::CALL(OpcodeParameter::U16(interrupt.get_vector())), bus);
}
pub fn check_interrupts(&mut self, bus: &mut Bus) -> Option<Interrupt> {
let interrupts = (bus.read(INTERRUPT_ENABLE_ADDRESS) & 0b00011111) & (bus.read(INTERRUPT_FLAG_ADDRESS) & 0b00011111);
if interrupts != 0 {
self.is_halted = false;
}
if !self.ime {
return None;
}
if Interrupt::VBlank.get(interrupts) {
return Some(Interrupt::VBlank);
} else if Interrupt::LCDSTAT.get(interrupts) {
return Some(Interrupt::LCDSTAT);
} else if Interrupt::Timer.get(interrupts) {
return Some(Interrupt::Timer);
} else if Interrupt::Serial.get(interrupts) {
return Some(Interrupt::Serial);
} else if Interrupt::Joypad.get(interrupts) {
return Some(Interrupt::Joypad);
}
None
}
pub fn ei_delay(&mut self, bus: &mut Bus) {
if self.ei_delay && !self.ime {
self.ei_delay = false;
self.run(bus);
self.ime = true;
}
}
pub fn run(&mut self, bus: &mut Bus) {
let cycles_start = self.get_cycles();
if let Some(interrupt) = self.check_interrupts(bus) {
self.handle_interrupt(bus, interrupt);
self.increment_cycles(Cycles(5));
} else if !self.is_halted {
let program_counter = self.registers.get(Register::PC);
let parameter_bytes = OpcodeParameterBytes::from_address(program_counter, bus);
let (opcode, cycles) = parameter_bytes.parse_opcode();
if self.enable_logs {
self.log(parameter_bytes);
self.increment_exec_calls_count();
}
self.increment_cycles(cycles);
self.exec(opcode, bus);
self.ei_delay(bus);
} else if self.is_halted {
self.increment_cycles(Cycles(1));
}
let cycles_end = self.get_cycles();
self.set_last_op_cycles(cycles_start, cycles_end);
}
pub fn exec(&mut self, opcode: Opcode, bus: &mut Bus) {
match opcode {
// Load
Opcode::LD(params) => match params {
OpcodeParameter::Register_Register(reg1, reg2) => {
self.registers.increment(Register::PC, 1);
if reg1.is_16bit() && reg2.is_8bit() {
let val = self.registers.get_8bit(reg2);
let addr = self.registers.get(reg1);
bus.write(addr, val);
} else if reg1.is_8bit() && reg2.is_16bit() {
let val = bus.read(self.registers.get(reg2)) as u16;
self.registers.set(reg1, val);
} else {
self.registers.set(reg1, self.registers.get(reg2));
}
},
OpcodeParameter::Register_U16(register, val) => {
self.registers.increment(Register::PC, 3);
match register.is_8bit() {
true => self.registers.set(register, bus.read(val) as u16),
false => self.registers.set(register, val),
};
},
OpcodeParameter::Register_U8(register, val) => {
self.registers.increment(Register::PC, 2);
match register.is_8bit() {
true => self.registers.set(register, val as u16),
false => bus.write(self.registers.get(register), val),
}
},
OpcodeParameter::U16_Register(address, register) => {
self.registers.increment(Register::PC, 3);
let value = self.registers.get(register);
let bytes = value.to_be_bytes();
match register.is_8bit() {
true => bus.write(address, bytes[1]),
false => bus.write_16bit(address, value),
};
},
OpcodeParameter::Register_FF00plusU8(register, val) => {
self.registers.increment(Register::PC, 2);
self.registers.set(register, bus.read(0xFF00 + (val as u16)) as u16);
},
OpcodeParameter::FF00plusU8_Register(val, register) => {
self.registers.increment(Register::PC, 2);
match register.is_8bit() {
true => bus.write(0xFF00 + (val as u16), self.registers.get_8bit(register)),
false => bus.write_16bit(0xFF00 + (val as u16), self.registers.get(register)),
}
},
OpcodeParameter::Register_FF00plusRegister(reg1, reg2) => {
self.registers.increment(Register::PC, 1);
let addr = 0xFF00 + self.registers.get(reg2);
self.registers.set(reg1, bus.read(addr) as u16);
},
OpcodeParameter::FF00plusRegister_Register(reg1, reg2) => {
self.registers.increment(Register::PC, 1);
let addr = 0xFF00 + self.registers.get(reg1);
bus.write(addr, self.registers.get_8bit(reg2));
},
OpcodeParameter::Register_RegisterPlusI8(reg1, reg2, value) => {
self.registers.increment(Register::PC, 2);
let reg2_value = self.registers.get(reg2);
self.registers.set_flag(FlagRegister::Zero, false);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::Carry, (reg2_value & 0x00FF) + ((value as u16) & 0x00FF) > 0xFF);
self.registers.set_flag(FlagRegister::HalfCarry, add_half_carry(reg2_value.to_be_bytes()[1], value as u8));
let res = (self.registers.get(reg2) as i16).wrapping_add(value as i16);
self.registers.set(reg1, res as u16);
},
_ => {},
},
// Increment or decrement program counter by signed N
Opcode::JR(params) => {
self.registers.increment(Register::PC, 2);
let mut condition_met = false;
let mut value = 0 as i16;
match params {
OpcodeParameter::I8(val) => {
condition_met = true;
value = val as i16;
},
OpcodeParameter::FlagRegisterReset_I8(flag, val) => {
condition_met = !self.registers.get_flag(flag);
value = val as i16;
},
OpcodeParameter::FlagRegisterSet_I8(flag, val) => {
condition_met = self.registers.get_flag(flag);
value = val as i16;
},
_ => {},
};
if condition_met {
self.increment_cycles(Cycles(1));
let pc = (self.registers.get(Register::PC) as i16) + (value as i16);
self.registers.set(Register::PC, pc as u16);
}
},
// Load and increment
Opcode::LDI(params) => match params {
OpcodeParameter::Register_RegisterIncrement(reg1, reg2) => {
self.registers.increment(Register::PC, 1);
let val = bus.read(self.registers.get(reg2));
self.registers.set(reg1, val as u16);
self.registers.increment(reg2, 1);
},
OpcodeParameter::RegisterIncrement_Register(reg1, reg2) => {
self.registers.increment(Register::PC, 1);
let val = self.registers.get_8bit(reg2);
bus.write(self.registers.get(reg1), val);
self.registers.increment(reg1, 1);
},
_ => {},
},
// Load and decrement
Opcode::LDD(params) => match params {
OpcodeParameter::Register_RegisterDecrement(reg1, reg2) => {
self.registers.increment(Register::PC, 1);
let val = bus.read(self.registers.get(reg2));
self.registers.set(reg1, val as u16);
self.registers.decrement(reg2, 1);
},
OpcodeParameter::RegisterDecrement_Register(reg1, reg2) => {
self.registers.increment(Register::PC, 1);
let val = self.registers.get_8bit(reg2);
bus.write(self.registers.get(reg1), val);
self.registers.decrement(reg1, 1);
},
_ => {},
},
Opcode::AND(params) => {
match params {
OpcodeParameter::Register_Register(reg1, reg2) => {
self.registers.increment(Register::PC, 1);
if reg2.is_8bit() {
self.registers.set(reg1, self.registers.get(reg1) & self.registers.get(reg2));
} else {
let val = bus.read(self.registers.get(reg2)) as u16;
self.registers.set(reg1, self.registers.get(reg1) & val);
}
self.registers.set_flag(FlagRegister::Zero, self.registers.get(reg1) == 0);
},
OpcodeParameter::Register_U8(reg, val) => {
self.registers.increment(Register::PC, 2);
self.registers.set(reg, self.registers.get(reg) & (val as u16));
self.registers.set_flag(FlagRegister::Zero, self.registers.get(reg) == 0);
},
_ => {},
};
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, true);
self.registers.set_flag(FlagRegister::Carry, false);
},
Opcode::OR(params) => {
match params {
OpcodeParameter::Register_Register(reg1, reg2) => {
self.registers.increment(Register::PC, 1);
if reg2.is_8bit() {
self.registers.set(reg1, self.registers.get(reg1) | self.registers.get(reg2));
} else {
let val = bus.read(self.registers.get(reg2)) as u16;
self.registers.set(reg1, self.registers.get(reg1) | val);
}
self.registers.set_flag(FlagRegister::Zero, self.registers.get(reg1) == 0);
},
OpcodeParameter::Register_U8(reg, val) => {
self.registers.increment(Register::PC, 2);
self.registers.set(reg, self.registers.get(reg) | (val as u16));
self.registers.set_flag(FlagRegister::Zero, self.registers.get(reg) == 0);
},
_ => {},
};
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
self.registers.set_flag(FlagRegister::Carry, false);
},
Opcode::XOR(params) => {
match params {
OpcodeParameter::Register_Register(reg1, reg2) => {
self.registers.increment(Register::PC, 1);
if reg2.is_8bit() {
self.registers.set(reg1, self.registers.get(reg1) ^ self.registers.get(reg2));
} else {
let val = bus.read(self.registers.get(reg2)) as u16;
self.registers.set(reg1, self.registers.get(reg1) ^ val);
}
self.registers.set_flag(FlagRegister::Zero, self.registers.get(reg1) == 0);
},
OpcodeParameter::Register_U8(reg, val) => {
self.registers.increment(Register::PC, 2);
self.registers.set(reg, self.registers.get(reg) ^ (val as u16));
self.registers.set_flag(FlagRegister::Zero, self.registers.get(reg) == 0);
},
_ => {},
};
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
self.registers.set_flag(FlagRegister::Carry, false);
},
// Substract without storing the value
Opcode::CP(params) => {
let mut val1: i16 = 0;
let mut val2: i16 = 0;
match params {
OpcodeParameter::Register_U8(register, val) => {
self.registers.increment(Register::PC, 2);
val1 = self.registers.get(register) as i16;
val2 = val as i16;
},
OpcodeParameter::Register_Register(reg1, reg2) => {
self.registers.increment(Register::PC, 1);
val1 = self.registers.get(reg1) as i16;
match reg2.is_8bit() {
true => val2 = self.registers.get(reg2) as i16,
false => val2 = bus.read(self.registers.get(reg2)) as i16,
};
}
_ => {},
};
self.registers.set_flag(FlagRegister::Zero, (val1 - val2) == 0);
self.registers.set_flag(FlagRegister::Substract, true);
self.registers.set_flag(FlagRegister::HalfCarry, sub_half_carry(val1.to_be_bytes()[1], val2.to_be_bytes()[1]));
self.registers.set_flag(FlagRegister::Carry, val2 > val1);
},
Opcode::ADD(params) => {
self.registers.increment(Register::PC, 1);
self.registers.set_flag(FlagRegister::Substract, false);
match params {
OpcodeParameter::Register_Register(reg1, reg2) => {
if reg1.is_8bit() && reg2.is_8bit() {
let res = (self.registers.get(reg1) as u16) + (self.registers.get(reg2) as u16);
self.registers.set_flag(FlagRegister::HalfCarry, add_half_carry(self.registers.get_8bit(reg1), self.registers.get_8bit(reg2)));
self.registers.increment(reg1, self.registers.get(reg2));
self.registers.set_flag(FlagRegister::Zero, self.registers.get(reg1) == 0);
self.registers.set_flag(FlagRegister::Carry, res > 0xFF);
} else if reg1.is_16bit() && reg2.is_16bit() {
let val1 = self.registers.get(reg1);
let val2 = self.registers.get(reg2);
self.registers.set_flag(FlagRegister::HalfCarry, add_half_carry_16bit(val1, val2));
let res = (val1 as usize) + (val2 as usize);
self.registers.increment(reg1, self.registers.get(reg2));
let carry = res > 0xFFFF;
self.registers.set_flag(FlagRegister::Carry, carry);
} else if reg1.is_8bit() && reg2.is_16bit() {
let val1 = self.registers.get(reg1);
let val2 = bus.read(self.registers.get(reg2)) as u16;
self.registers.increment(reg1, val2);
self.registers.set_flag(FlagRegister::HalfCarry, add_half_carry(val1.to_be_bytes()[1], val2.to_be_bytes()[1]));
self.registers.set_flag(FlagRegister::Zero, self.registers.get(reg1) == 0);
self.registers.set_flag(FlagRegister::Carry, (val1 as usize + val2 as usize) > 0xFF);
}
},
OpcodeParameter::Register_U8(reg1, val) => {
self.registers.increment(Register::PC, 1);
match reg1.is_8bit() {
true => {
let val1 = self.registers.get(reg1);
let val2 = val as u16;
self.registers.increment(reg1, val2);
self.registers.set_flag(FlagRegister::HalfCarry, add_half_carry(val1.to_be_bytes()[1], val2.to_be_bytes()[1]));
self.registers.set_flag(FlagRegister::Zero, self.registers.get(reg1) == 0);
self.registers.set_flag(FlagRegister::Carry, (val1 as u16) + (val2 as u16) > 0xFF);
},
false => {
let addr = self.registers.get(reg1);
let val1 = bus.read(addr);
let val2 = val;
let res = val1.wrapping_add(val2);
bus.write(addr, res);
self.registers.set_flag(FlagRegister::HalfCarry, add_half_carry(val1, val2));
self.registers.set_flag(FlagRegister::Zero, res == 0);
self.registers.set_flag(FlagRegister::Carry, (val1 as u16) + (val2 as u16) > 0xFF);
},
};
},
OpcodeParameter::Register_I8(reg, value) => {
self.registers.increment(Register::PC, 1);
self.registers.set_flag(FlagRegister::Zero, false);
self.registers.set_flag(FlagRegister::Carry, (self.registers.get(reg) & 0x00FF) + ((value as u16) & 0x00FF) > 0xFF);
self.registers.set_flag(FlagRegister::HalfCarry, add_half_carry(self.registers.get_8bit(reg), value as u8));
let res = (self.registers.get(reg) as i16).wrapping_add(value as i16);
self.registers.set(reg, res as u16);
},
_ => {},
};
},
Opcode::ADC(params) => {
let mut carry_prev = false;
let mut half_carry_prev = false;
match params {
OpcodeParameter::Register_Register(reg1, reg2) => {
let carry = self.registers.get_flag(FlagRegister::Carry);
self.exec(Opcode::ADD(OpcodeParameter::Register_Register(reg1, reg2)), bus);
carry_prev = self.registers.get_flag(FlagRegister::Carry);
half_carry_prev = self.registers.get_flag(FlagRegister::HalfCarry);
if carry {
self.registers.decrement(Register::PC, 2);
self.exec(Opcode::ADD(OpcodeParameter::Register_U8(reg1, 1)), bus);
}
},
OpcodeParameter::Register_U8(reg1, val) => {
let carry = self.registers.get_flag(FlagRegister::Carry);
self.exec(Opcode::ADD(OpcodeParameter::Register_U8(reg1, val)), bus);
carry_prev = self.registers.get_flag(FlagRegister::Carry);
half_carry_prev = self.registers.get_flag(FlagRegister::HalfCarry);
if carry {
self.registers.decrement(Register::PC, 2);
self.exec(Opcode::ADD(OpcodeParameter::Register_U8(reg1, 1)), bus);
}
},
OpcodeParameter::Register_I8(reg1, val) => {
let carry = self.registers.get_flag(FlagRegister::Carry);
self.exec(Opcode::ADD(OpcodeParameter::Register_I8(reg1, val)), bus);
carry_prev = self.registers.get_flag(FlagRegister::Carry);
half_carry_prev = self.registers.get_flag(FlagRegister::HalfCarry);
if carry {
self.registers.decrement(Register::PC, 2);
self.exec(Opcode::ADD(OpcodeParameter::Register_I8(reg1, 1)), bus);
}
},
_ => {},
};
self.registers.set_flag(FlagRegister::Carry, carry_prev || self.registers.get_flag(FlagRegister::Carry));
self.registers.set_flag(FlagRegister::HalfCarry, half_carry_prev || self.registers.get_flag(FlagRegister::HalfCarry));
},
Opcode::SUB(params) => {
self.registers.increment(Register::PC, 1);
let mut register = Register::A;
let mut val1: u16 = 0;
let mut val2: u16 = 0;
match params {
OpcodeParameter::Register_Register(reg1, reg2) => {
register = reg1;
val1 = self.registers.get(reg1);
if reg1.is_8bit() && reg2.is_8bit() {
val2 = self.registers.get(reg2);
} else if reg1.is_8bit() && reg2.is_16bit() {
val2 = bus.read(self.registers.get(reg2)) as u16;
}
},
OpcodeParameter::Register_U8(reg1, val) => {
self.registers.increment(Register::PC, 1);
register = reg1;
val1 = self.registers.get(reg1);
val2 = val as u16;
},
_ => {},
};
let carry = val2 > val1;
if carry {
val1 = val1 | 0x100;
}
let result = val1.wrapping_sub(val2);
self.registers.set(register, result);
self.registers.set_flag(FlagRegister::Zero, self.registers.get(register) == 0);
self.registers.set_flag(FlagRegister::Substract, true);
self.registers.set_flag(FlagRegister::Carry, carry);
self.registers.set_flag(FlagRegister::HalfCarry, sub_half_carry(val1.to_be_bytes()[1], val2.to_be_bytes()[1]));
},
Opcode::SBC(params) => {
let mut carry_prev = false;
let mut half_carry_prev = false;
match params {
OpcodeParameter::Register_Register(reg1, reg2) => {
let carry = self.registers.get_flag(FlagRegister::Carry);
self.exec(Opcode::SUB(OpcodeParameter::Register_Register(reg1, reg2)), bus);
carry_prev = self.registers.get_flag(FlagRegister::Carry);
half_carry_prev = self.registers.get_flag(FlagRegister::HalfCarry);
if carry {
self.registers.decrement(Register::PC, 2);
self.exec(Opcode::SUB(OpcodeParameter::Register_U8(reg1, 1)), bus);
}
},
OpcodeParameter::Register_U8(reg1, val) => {
let carry = self.registers.get_flag(FlagRegister::Carry);
self.exec(Opcode::SUB(OpcodeParameter::Register_U8(reg1, val)), bus);
carry_prev = self.registers.get_flag(FlagRegister::Carry);
half_carry_prev = self.registers.get_flag(FlagRegister::HalfCarry);
if carry {
self.registers.decrement(Register::PC, 2);
self.exec(Opcode::SUB(OpcodeParameter::Register_U8(reg1, 1)), bus);
}
},
OpcodeParameter::Register_I8(reg1, val) => {
let carry = self.registers.get_flag(FlagRegister::Carry);
self.exec(Opcode::ADD(OpcodeParameter::Register_I8(reg1, val)), bus);
carry_prev = self.registers.get_flag(FlagRegister::Carry);
half_carry_prev = self.registers.get_flag(FlagRegister::HalfCarry);
if carry {
self.registers.decrement(Register::PC, 2);
self.exec(Opcode::SUB(OpcodeParameter::Register_I8(reg1, 1)), bus);
}
},
_ => {},
};
self.registers.set_flag(FlagRegister::Carry, carry_prev || self.registers.get_flag(FlagRegister::Carry));
self.registers.set_flag(FlagRegister::HalfCarry, half_carry_prev || self.registers.get_flag(FlagRegister::HalfCarry));
},
// Increment by 1
Opcode::INC(affect_flags, on_address, register) => {
self.registers.increment(Register::PC, 1);
if on_address {
let addr = self.registers.get(register);
let prev_value = bus.read(addr);
bus.write(addr, prev_value.wrapping_add(1));
if affect_flags {
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, add_half_carry(prev_value, 1));
self.registers.set_flag(FlagRegister::Zero, bus.read(addr) == 0);
}
} else {
let prev_value = self.registers.get(register);
self.registers.increment(register, 1);
if affect_flags {
let mut byte_compare = 0;
match register.is_8bit() {
true => byte_compare = prev_value.to_be_bytes()[1],
false => byte_compare = prev_value.to_be_bytes()[0],
}
let result = self.registers.get(register);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, add_half_carry(byte_compare, 1));
self.registers.set_flag(FlagRegister::Zero, result == 0);
}
}
},
// Decrement by 1
Opcode::DEC(affect_flags, on_address, register) => {
self.registers.increment(Register::PC, 1);
if on_address {
let addr = self.registers.get(register);
let prev_value = bus.read(addr);
bus.write(addr, prev_value.wrapping_sub(1));
if affect_flags {
self.registers.set_flag(FlagRegister::Substract, true);
self.registers.set_flag(FlagRegister::HalfCarry, sub_half_carry(prev_value, 1));
self.registers.set_flag(FlagRegister::Zero, bus.read(addr) == 0);
}
} else {
let prev_value = self.registers.get(register);
self.registers.decrement(register, 1);
if affect_flags {
let mut byte_compare = 0;
match register.is_8bit() {
true => byte_compare = prev_value.to_be_bytes()[1],
false => byte_compare = prev_value.to_be_bytes()[0],
}
let result = self.registers.get(register);
self.registers.set_flag(FlagRegister::Substract, true);
self.registers.set_flag(FlagRegister::HalfCarry, sub_half_carry(byte_compare, 1));
self.registers.set_flag(FlagRegister::Zero, result == 0);
}
}
},
// BCD correction
Opcode::DAA => {
self.registers.increment(Register::PC, 1);
let mut val = self.registers.get_8bit(Register::A);
if !self.registers.get_flag(FlagRegister::Substract) {
if self.registers.get_flag(FlagRegister::Carry) || val > 0x99 {
val = val.wrapping_add(0x60);
self.registers.set_flag(FlagRegister::Carry, true);
}
if self.registers.get_flag(FlagRegister::HalfCarry) || ((val & 0x0F) > 0x09) {
val = val.wrapping_add(0x6);
}
} else {
if self.registers.get_flag(FlagRegister::Carry) {
val = val.wrapping_sub(0x60);
}
if self.registers.get_flag(FlagRegister::HalfCarry) {
val = val.wrapping_sub(0x6);
}
}
self.registers.set(Register::A, val as u16);
self.registers.set_flag(FlagRegister::HalfCarry, false);
self.registers.set_flag(FlagRegister::Zero, val == 0);
},
// Jump to address
Opcode::JP(params) => match params {
OpcodeParameter::U16(address) => self.registers.set(Register::PC, address),
OpcodeParameter::Register(register) => self.registers.set(Register::PC, self.registers.get(register)),
OpcodeParameter::FlagRegisterReset_U16(flag, addr) => {
self.registers.increment(Register::PC, 3);
if !self.registers.get_flag(flag) {
self.registers.set(Register::PC, addr);
self.increment_cycles(Cycles(1));
}
},
OpcodeParameter::FlagRegisterSet_U16(flag, addr) => {
self.registers.increment(Register::PC, 3);
if self.registers.get_flag(flag) {
self.registers.set(Register::PC, addr);
self.increment_cycles(Cycles(1));
}
},
_ => {},
},
// CALL
Opcode::CALL(params) => {
self.registers.increment(Register::PC, 3);
let mut condition_met = false;
let mut addr = self.registers.get(Register::PC);
match params {
OpcodeParameter::U16(address) => {
condition_met = true;
addr = address;
},
OpcodeParameter::FlagRegisterReset_U16(flag, address) => {
condition_met = !self.registers.get_flag(flag);
addr = address;
if condition_met {self.increment_cycles(Cycles(3))};
},
OpcodeParameter::FlagRegisterSet_U16(flag, address) => {
condition_met = self.registers.get_flag(flag);
addr = address;
if condition_met {self.increment_cycles(Cycles(3))};
},
_ => {},
};
if condition_met {
let pc = self.registers.get(Register::PC);
self.registers.decrement(Register::SP, 2);
let sp = self.registers.get(Register::SP);
bus.write_16bit(sp, pc);
self.registers.set(Register::PC, addr);
}
},
// RST, same as Call
Opcode::RST(address) => {
self.registers.decrement(Register::PC, 2);
self.exec(Opcode::CALL(OpcodeParameter::U16(address as u16)), bus);
},
// PUSH onto the stack
Opcode::PUSH(register) => {
self.registers.increment(Register::PC, 1);
let val = self.registers.get(register).to_be_bytes();
self.registers.decrement(Register::SP, 1);
bus.write(self.registers.get(Register::SP), val[0]);
self.registers.decrement(Register::SP, 1);
bus.write(self.registers.get(Register::SP), val[1]);
},
// POP onto the stack
Opcode::POP(register) => {
self.registers.increment(Register::PC, 1);
let sp = self.registers.get(Register::SP);
let val = bus.read_16bit(sp);
match register {
Register::AF => self.registers.set(register, val & 0xFFF0),
_ => self.registers.set(register, val),
};
self.registers.increment(Register::SP, 2);
},
// RET, same as POP PC when no parameter is specified
Opcode::RET(params) => {
self.registers.increment(Register::PC, 1);
match params {
OpcodeParameter::NoParam => self.exec(Opcode::POP(Register::PC), bus),
OpcodeParameter::FlagRegisterReset(flag) => {
if !self.registers.get_flag(flag) {
self.exec(Opcode::POP(Register::PC), bus);
self.increment_cycles(Cycles(3));
}
},
OpcodeParameter::FlagRegisterSet(flag) => {
if self.registers.get_flag(flag) {
self.exec(Opcode::POP(Register::PC), bus);
self.increment_cycles(Cycles(3));
}
},
_ => {},
};
},
// Rotate A Left
Opcode::RLCA => {
self.registers.increment(Register::PC, 1);
let val = self.registers.get_8bit(Register::A);
self.registers.set_flag(FlagRegister::Carry, get_bit(val, BitIndex::I7));
let result = val.rotate_left(1);
self.registers.set(Register::A, result as u16);
self.registers.set_flag(FlagRegister::Zero, false);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
},
// Rotate A Right
Opcode::RRCA => {
self.registers.increment(Register::PC, 1);
let val = self.registers.get_8bit(Register::A);
self.registers.set_flag(FlagRegister::Carry, get_bit(val, BitIndex::I0));
let result = val.rotate_right(1);
self.registers.set(Register::A, result as u16);
self.registers.set_flag(FlagRegister::Zero, false);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
},
Opcode::RLA => {
self.registers.increment(Register::PC, 1);
let val = self.registers.get_8bit(Register::A);
let old_carry = self.registers.get_flag(FlagRegister::Carry);
let new_carry = get_bit(val, BitIndex::I7);
let val = val << 1 | (old_carry as u8);
self.registers.set(Register::A, val as u16);
self.registers.set_flag(FlagRegister::Carry, new_carry);
self.registers.set_flag(FlagRegister::Zero, false);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
},
Opcode::RRA => {
self.registers.increment(Register::PC, 1);
let val = self.registers.get_8bit(Register::A);
let old_carry = self.registers.get_flag(FlagRegister::Carry);
let new_carry = get_bit(val, BitIndex::I0);
let val = val >> 1 | ((old_carry as u8) << 7);
self.registers.set(Register::A, val as u16);
self.registers.set_flag(FlagRegister::Carry, new_carry);
self.registers.set_flag(FlagRegister::Zero, false);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
},
Opcode::PrefixCB(opcode) => {
self.registers.increment(Register::PC, 2);
match *opcode {
Opcode::RLC(register) => {
let mut result = 0;
let mut val = 0;
if register.is_8bit() {
val = self.registers.get_8bit(register);
result = val.rotate_left(1);
self.registers.set(register, result as u16);
} else {
let addr = self.registers.get(register);
val = bus.read(addr);
result = val.rotate_left(1);
bus.write(addr, result);
}
self.registers.set_flag(FlagRegister::Zero, result == 0);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
self.registers.set_flag(FlagRegister::Carry, get_bit(val, BitIndex::I7));
},
Opcode::RRC(register) => {
let mut result = 0;
let mut val = 0;
if register.is_8bit() {
val = self.registers.get_8bit(register);
result = val.rotate_right(1);
self.registers.set(register, result as u16);
} else {
let addr = self.registers.get(register);
val = bus.read(addr);
result = val.rotate_right(1);
bus.write(addr, result);
}
self.registers.set_flag(FlagRegister::Zero, result == 0);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
self.registers.set_flag(FlagRegister::Carry, get_bit(val, BitIndex::I0));
},
Opcode::RL(register) => {
let mut val = 0;
match register.is_8bit() {
true => val = self.registers.get_8bit(register),
false => val = bus.read(self.registers.get(register)),
};
let old_carry = self.registers.get_flag(FlagRegister::Carry);
let new_carry = get_bit(val, BitIndex::I7);
let val = val << 1 | (old_carry as u8);
match register.is_8bit() {
true => self.registers.set(register, val as u16),
false => bus.write(self.registers.get(register), val),
};
self.registers.set_flag(FlagRegister::Carry, new_carry);
self.registers.set_flag(FlagRegister::Zero, val == 0);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
},
Opcode::RR(register) => {
let mut val = 0;
match register.is_8bit() {
true => val = self.registers.get_8bit(register),
false => val = bus.read(self.registers.get(register)),
};
let old_carry = self.registers.get_flag(FlagRegister::Carry);
let new_carry = get_bit(val, BitIndex::I0);
let val = val >> 1 | ((old_carry as u8) << 7);
match register.is_8bit() {
true => self.registers.set(register, val as u16),
false => bus.write(self.registers.get(register), val),
};
self.registers.set_flag(FlagRegister::Carry, new_carry);
self.registers.set_flag(FlagRegister::Zero, val == 0);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
},
Opcode::SLA(register) => {
let mut val = 0;
match register.is_8bit() {
true => val = self.registers.get_8bit(register) as i8,
false => val = bus.read(self.registers.get(register)) as i8,
};
let res = val << 1;
match register.is_8bit() {
true => self.registers.set(register, res as u16),
false => bus.write(self.registers.get(register), res as u8),
};
self.registers.set_flag(FlagRegister::Carry, get_bit(val as u8, BitIndex::I7));
self.registers.set_flag(FlagRegister::Zero, res == 0);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
},
Opcode::SRA(register) => {
let mut val = 0;
match register.is_8bit() {
true => val = self.registers.get_8bit(register) as i8,
false => val = bus.read(self.registers.get(register)) as i8,
};
let res = val >> 1;
match register.is_8bit() {
true => self.registers.set(register, res as u16),
false => bus.write(self.registers.get(register), res as u8),
};
self.registers.set_flag(FlagRegister::Carry, get_bit(val as u8, BitIndex::I0));
self.registers.set_flag(FlagRegister::Zero, res == 0);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
},
Opcode::SRL(register) => {
let mut val = 0;
match register.is_8bit() {
true => val = self.registers.get_8bit(register),
false => val = bus.read(self.registers.get(register)),
};
let carry = get_bit(val, BitIndex::I0);
let val = val >> 1;
match register.is_8bit() {
true => self.registers.set(register, val as u16),
false => bus.write(self.registers.get(register), val),
};
self.registers.set_flag(FlagRegister::Carry, carry);
self.registers.set_flag(FlagRegister::Zero, val == 0);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
},
Opcode::SWAP(register) => {
let mut val = 0;
match register.is_8bit() {
true => val = self.registers.get_8bit(register),
false => val = bus.read(self.registers.get(register)),
};
let val = (val << 4) | (val >> 4);
match register.is_8bit() {
true => self.registers.set(register, val as u16),
false => bus.write(self.registers.get(register), val),
};
self.registers.set_flag(FlagRegister::Zero, val == 0);
self.registers.set_flag(FlagRegister::Carry, false);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
},
Opcode::BIT(index, register) => {
let mut val = 0;
match register.is_8bit() {
true => val = self.registers.get_8bit(register),
false => val = bus.read(self.registers.get(register)),
};
let res = get_bit(val, index);
self.registers.set_flag(FlagRegister::Zero, !res);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, true);
},
Opcode::RES(index, register) => {
let mut val = 0;
match register.is_8bit() {
true => val = self.registers.get_8bit(register),
false => val = bus.read(self.registers.get(register)),
};
let val = set_bit(val, false, index);
match register.is_8bit() {
true => self.registers.set(register, val as u16),
false => bus.write(self.registers.get(register), val),
};
},
Opcode::SET(index, register) => {
let mut val = 0;
match register.is_8bit() {
true => val = self.registers.get_8bit(register),
false => val = bus.read(self.registers.get(register)),
};
let val = set_bit(val, true, index);
match register.is_8bit() {
true => self.registers.set(register, val as u16),
false => bus.write(self.registers.get(register), val),
};
},
_ => {},
};
},
Opcode::CPL => {
self.registers.increment(Register::PC, 1);
self.registers.set(Register::A, !self.registers.get(Register::A));
self.registers.set_flag(FlagRegister::Substract, true);
self.registers.set_flag(FlagRegister::HalfCarry, true);
},
// Invert the carry flag
Opcode::CCF => {
self.registers.increment(Register::PC, 1);
self.registers.set_flag(FlagRegister::Carry, !self.registers.get_flag(FlagRegister::Carry));
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
},
// Set the carry flag
Opcode::SCF => {
self.registers.increment(Register::PC, 1);
self.registers.set_flag(FlagRegister::Carry, true);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
},
// Enable interrupts
Opcode::EI => {
self.registers.increment(Register::PC, 1);
self.ei_delay = true;
},
// Disable interrupts
Opcode::DI => {
self.registers.increment(Register::PC, 1);
self.ime = false;
},
// Same as enabling interrupts and then executing RET
Opcode::RETI => {
self.exec(Opcode::RET(OpcodeParameter::NoParam), bus);
self.ime = true;
},
// Don't execute instructions until an interrupt is requested
Opcode::HALT => {
self.registers.increment(Register::PC, 1);
self.is_halted = true;
},
Opcode::STOP => {
self.registers.increment(Register::PC, 2);
},
Opcode::NOP => self.registers.increment(Register::PC, 1),
Opcode::IllegalInstruction => {
println!("Illegal instruction!");
self.registers.increment(Register::PC, 1);
},
_ => unreachable!(),
};
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_registers_setters_getters() {
// Test 8 bit setters and getters
let mut registers = Registers::new();
registers.set(Register::A, 0b01010101);
assert_eq!(registers.get(Register::A), 0b01010101);
registers.set(Register::F, 0b01010101);
assert_eq!(registers.get(Register::F), 0b01010101);
registers.set(Register::B, 0b01010101);
assert_eq!(registers.get(Register::B), 0b01010101);
registers.set(Register::C, 0b01010101);
assert_eq!(registers.get(Register::C), 0b01010101);
registers.set(Register::D, 0b01010101);
assert_eq!(registers.get(Register::D), 0b01010101);
registers.set(Register::E, 0b01010101);
assert_eq!(registers.get(Register::E), 0b01010101);
registers.set(Register::H, 0b01010101);
assert_eq!(registers.get(Register::H), 0b01010101);
registers.set(Register::L, 0b01010101);
assert_eq!(registers.get(Register::L), 0b01010101);
// Test 16 bit setters and getters
let mut registers = Registers::new();
registers.set(Register::A, 0b01010101);
registers.set(Register::F, 0b11111111);
assert_eq!(registers.get(Register::AF), 0b0101010111111111);
registers.set(Register::AF, 0b1111111101010101);
assert_eq!(registers.get(Register::AF), 0b1111111101010101);
registers.set(Register::B, 0b01010101);
registers.set(Register::C, 0b11111111);
assert_eq!(registers.get(Register::BC), 0b0101010111111111);
registers.set(Register::BC, 0b1111111101010101);
assert_eq!(registers.get(Register::BC), 0b1111111101010101);
registers.set(Register::D, 0b01010101);
registers.set(Register::E, 0b11111111);
assert_eq!(registers.get(Register::DE), 0b0101010111111111);
registers.set(Register::DE, 0b1111111101010101);
assert_eq!(registers.get(Register::DE), 0b1111111101010101);
registers.set(Register::H, 0b01010101);
registers.set(Register::L, 0b11111111);
assert_eq!(registers.get(Register::HL), 0b0101010111111111);
registers.set(Register::HL, 0b1111111101010101);
assert_eq!(registers.get(Register::HL), 0b1111111101010101);
registers.set(Register::SP, 0b0101010111111111);
assert_eq!(registers.get(Register::SP), 0b0101010111111111);
registers.set(Register::PC, 0b0101010111111111);
assert_eq!(registers.get(Register::PC), 0b0101010111111111);
}
#[test]
fn test_ld_instructions() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0xFF);
cpu.exec(Opcode::LD(OpcodeParameter::Register_Register(Register::B, Register::A)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0xFF);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.exec(Opcode::LD(OpcodeParameter::Register_U16(Register::SP, 0xF1F1)), &mut bus);
assert_eq!(cpu.registers.get(Register::SP), 0xF1F1);
assert_eq!(cpu.registers.get(Register::PC), 0x103);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
bus.write(addr, 0xF1);
cpu.exec(Opcode::LD(OpcodeParameter::Register_U16(Register::A, addr)), &mut bus);
assert_eq!(cpu.registers.get(Register::A), 0xF1);
assert_eq!(cpu.registers.get(Register::PC), 0x103);
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.exec(Opcode::LD(OpcodeParameter::Register_U8(Register::B, 0xF1)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0xF1);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.registers.set(Register::SP, 0x1234);
cpu.exec(Opcode::LD(OpcodeParameter::U16_Register(0xF0F0, Register::SP)), &mut bus);
assert_eq!(bus.read_16bit(0xF0F0), 0x1234);
assert_eq!(cpu.registers.get(Register::PC), 0x103);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::A, 0x12);
cpu.exec(Opcode::LD(OpcodeParameter::U16_Register(addr, Register::A)), &mut bus);
assert_eq!(bus.read(addr), 0x12);
assert_eq!(cpu.registers.get(Register::PC), 0x103);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::A, 0xFF);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0x00);
cpu.exec(Opcode::LD(OpcodeParameter::Register_Register(Register::HL, Register::A)), &mut bus);
assert_eq!(bus.read(addr), 0xFF);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::A, 0x00);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0xFF);
cpu.exec(Opcode::LD(OpcodeParameter::Register_Register(Register::A, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get(Register::A), 0xFF);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xFF00;
cpu.registers.set(Register::A, 0xF1);
cpu.exec(Opcode::LD(OpcodeParameter::FF00plusU8_Register(0x42, Register::A)), &mut bus);
assert_eq!(bus.read(addr + 0x42), 0xF1);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xFF00;
cpu.registers.set(Register::A, 0x00);
bus.write(addr + 0x42, 0xF1);
cpu.exec(Opcode::LD(OpcodeParameter::Register_FF00plusU8(Register::A, 0x42)), &mut bus);
assert_eq!(cpu.registers.get(Register::A), 0xF1);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
let val = 100;
cpu.registers.set(Register::SP, val);
cpu.exec(Opcode::LD(OpcodeParameter::Register_RegisterPlusI8(Register::HL, Register::SP, -5)), &mut bus);
assert_eq!(cpu.registers.get(Register::HL), val - 5);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.registers.set(Register::HL, 0x0000);
cpu.registers.set(Register::SP, 0x000F);
cpu.exec(Opcode::LD(OpcodeParameter::Register_RegisterPlusI8(Register::HL, Register::SP, 0x01)), &mut bus);
assert_eq!(cpu.registers.get(Register::HL), 0x0010);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::HL, addr);
cpu.exec(Opcode::LD(OpcodeParameter::Register_U8(Register::HL, 0xF1)), &mut bus);
assert_eq!(bus.read(addr), 0xF1);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::C, 1);
bus.write(0xFF01, 0xF1);
cpu.exec(Opcode::LD(OpcodeParameter::Register_FF00plusRegister(Register::A, Register::C)), &mut bus);
assert_eq!(cpu.registers.get(Register::A), 0xF1);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::C, 1);
cpu.registers.set(Register::A, 0xF1);
cpu.exec(Opcode::LD(OpcodeParameter::FF00plusRegister_Register(Register::C, Register::A)), &mut bus);
assert_eq!(bus.read(0xFF01), 0xF1);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_ldi_instructions() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::A, 0x00);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0xF1);
cpu.exec(Opcode::LDI(OpcodeParameter::Register_RegisterIncrement(Register::A, Register::HL)), &mut bus);
assert_eq!(bus.read(addr), 0xF1);
assert_eq!(cpu.registers.get(Register::A), 0xF1);
assert_eq!(cpu.registers.get(Register::HL), addr + 1);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut bus = Bus::new();
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::A, 0x1F);
cpu.registers.set(Register::HL, addr);
cpu.exec(Opcode::LDI(OpcodeParameter::RegisterIncrement_Register(Register::HL, Register::A)), &mut bus);
assert_eq!(bus.read(addr), 0x1F);
assert_eq!(cpu.registers.get(Register::HL), addr + 1);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_ldd_instructions() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::A, 0x00);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0xF1);
cpu.exec(Opcode::LDD(OpcodeParameter::Register_RegisterDecrement(Register::A, Register::HL)), &mut bus);
assert_eq!(bus.read(addr), 0xF1);
assert_eq!(cpu.registers.get(Register::A), 0xF1);
assert_eq!(cpu.registers.get(Register::HL), addr - 1);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut bus = Bus::new();
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::A, 0x1F);
cpu.registers.set(Register::HL, addr);
cpu.exec(Opcode::LDD(OpcodeParameter::RegisterDecrement_Register(Register::HL, Register::A)), &mut bus);
assert_eq!(bus.read(addr), 0x1F);
assert_eq!(cpu.registers.get(Register::HL), addr - 1);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_jp_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.exec(Opcode::JP(OpcodeParameter::U16(0x1F1F)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 0x1F1F);
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::HL, addr);
cpu.exec(Opcode::JP(OpcodeParameter::Register(Register::HL)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), addr);
let mut cpu = CPU::new();
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.exec(Opcode::JP(OpcodeParameter::FlagRegisterReset_U16(FlagRegister::Zero, addr)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), addr);
let mut cpu = CPU::new();
cpu.registers.set_flag(FlagRegister::Zero, true);
cpu.exec(Opcode::JP(OpcodeParameter::FlagRegisterSet_U16(FlagRegister::Zero, addr)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), addr);
let mut cpu = CPU::new();
cpu.registers.set_flag(FlagRegister::Zero, true);
cpu.exec(Opcode::JP(OpcodeParameter::FlagRegisterReset_U16(FlagRegister::Zero, addr)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 0x103);
let mut cpu = CPU::new();
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.exec(Opcode::JP(OpcodeParameter::FlagRegisterSet_U16(FlagRegister::Zero, addr)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 0x103);
}
#[test]
fn test_jr_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.registers.set(Register::PC, 100);
cpu.exec(Opcode::JR(OpcodeParameter::I8(-5)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 95 + 2);
cpu.registers.set(Register::PC, 100);
cpu.exec(Opcode::JR(OpcodeParameter::I8(5)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 105 + 2);
cpu.registers.set(Register::PC, 100);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.exec(Opcode::JR(OpcodeParameter::FlagRegisterReset_I8(FlagRegister::Zero, -5)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 95 + 2);
cpu.registers.set(Register::PC, 100);
cpu.registers.set_flag(FlagRegister::Zero, true);
cpu.exec(Opcode::JR(OpcodeParameter::FlagRegisterSet_I8(FlagRegister::Zero, -5)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 95 + 2);
cpu.registers.set(Register::PC, 100);
cpu.registers.set_flag(FlagRegister::Zero, true);
cpu.exec(Opcode::JR(OpcodeParameter::FlagRegisterReset_I8(FlagRegister::Zero, -5)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 100 + 2);
cpu.registers.set(Register::PC, 100);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.exec(Opcode::JR(OpcodeParameter::FlagRegisterSet_I8(FlagRegister::Zero, -5)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 100 + 2);
cpu.registers.set(Register::PC, 100);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.exec(Opcode::JR(OpcodeParameter::FlagRegisterReset_I8(FlagRegister::Zero, 5)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 105 + 2);
}
#[test]
fn test_di_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.exec(Opcode::DI, &mut bus);
assert_eq!(cpu.ime, false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_ei_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.exec(Opcode::EI, &mut bus);
assert_eq!(cpu.ime, true);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_rlca_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.registers.set(Register::A, 0b00000010);
cpu.exec(Opcode::RLCA, &mut bus);
assert_eq!(cpu.registers.get(Register::A), 0b00000100);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.registers.set(Register::A, 0b10000000);
cpu.exec(Opcode::RLCA, &mut bus);
assert_eq!(cpu.registers.get(Register::A), 0b00000001);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.registers.set(Register::A, 0x01);
cpu.exec(Opcode::RLCA, &mut bus);
assert_eq!(cpu.registers.get(Register::A), 0x02);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_rrca_instructions() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b01000000);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::RRCA, &mut bus);
assert_eq!(cpu.registers.get(Register::A), 0b00100000);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.registers.set(Register::A, 0b00000001);
cpu.exec(Opcode::RRCA, &mut bus);
assert_eq!(cpu.registers.get(Register::A), 0b10000000);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_call_instructions() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
let sp = 0xFFDF;
cpu.registers.set(Register::SP, sp);
cpu.registers.set(Register::PC, 0x1234);
cpu.exec(Opcode::CALL(OpcodeParameter::U16(0xF0F0)), &mut bus);
assert_eq!(bus.read_16bit(sp - 2), 0x1234 + 3);
assert_eq!(cpu.registers.get(Register::SP), sp - 2);
assert_eq!(cpu.registers.get(Register::PC), 0xF0F0);
let mut cpu = CPU::new();
let sp = 0xFFDF;
cpu.registers.set(Register::SP, sp);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set(Register::PC, 0x1234);
cpu.exec(Opcode::CALL(OpcodeParameter::FlagRegisterReset_U16(FlagRegister::Zero, 0xF0F0)), &mut bus);
assert_eq!(bus.read_16bit(sp - 2), 0x1234 + 3);
assert_eq!(cpu.registers.get(Register::SP), sp - 2);
assert_eq!(cpu.registers.get(Register::PC), 0xF0F0);
let mut cpu = CPU::new();
let sp = 0xFFDF;
cpu.registers.set(Register::SP, sp);
cpu.registers.set_flag(FlagRegister::Zero, true);
cpu.exec(Opcode::CALL(OpcodeParameter::FlagRegisterReset_U16(FlagRegister::Zero, 0xF0F0)), &mut bus);
assert_eq!(bus.read_16bit(sp - 2), 0x1234 + 3);
assert_eq!(cpu.registers.get(Register::SP), sp);
assert_eq!(cpu.registers.get(Register::PC), 0x103);
let mut cpu = CPU::new();
let sp = 0xFFDF;
cpu.registers.set(Register::SP, sp);
cpu.registers.set_flag(FlagRegister::Zero, true);
cpu.registers.set(Register::PC, 0x1234);
cpu.exec(Opcode::CALL(OpcodeParameter::FlagRegisterSet_U16(FlagRegister::Zero, 0xF0F0)), &mut bus);
assert_eq!(bus.read_16bit(sp - 2), 0x1234 + 3);
assert_eq!(cpu.registers.get(Register::SP), sp - 2);
assert_eq!(cpu.registers.get(Register::PC), 0xF0F0);
let mut cpu = CPU::new();
let sp = 0xFFDF;
cpu.registers.set(Register::SP, sp);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.exec(Opcode::CALL(OpcodeParameter::FlagRegisterSet_U16(FlagRegister::Zero, 0xF0F0)), &mut bus);
assert_eq!(bus.read_16bit(sp - 2), 0x1234 + 3);
assert_eq!(cpu.registers.get(Register::SP), sp);
assert_eq!(cpu.registers.get(Register::PC), 0x103);
}
#[test]
fn test_rst_instructions() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
let sp = 0xFFDF;
cpu.registers.set(Register::SP, sp);
cpu.registers.set(Register::PC, 0x1234);
cpu.exec(Opcode::RST(0xF0), &mut bus);
assert_eq!(bus.read_16bit(sp - 2), 0x1234 + 1);
assert_eq!(cpu.registers.get(Register::SP), sp - 2);
assert_eq!(cpu.registers.get(Register::PC), 0x00F0);
}
#[test]
fn test_push_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xD000;
cpu.registers.set(Register::SP, addr);
cpu.registers.set(Register::AF, 0x1234);
cpu.exec(Opcode::PUSH(Register::AF), &mut bus);
assert_eq!(bus.read_16bit(addr - 2), 0x1234);
assert_eq!(cpu.registers.get(Register::SP), addr - 2);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_pop_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xD000;
cpu.registers.set(Register::SP, addr);
bus.write_16bit(addr, 0x1234);
cpu.exec(Opcode::POP(Register::PC), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 0x1234);
assert_eq!(cpu.registers.get(Register::SP), addr + 2);
}
#[test]
fn test_ret_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
let sp = 0xD000;
cpu.registers.set(Register::SP, sp);
bus.write_16bit(sp, 0x1234);
cpu.exec(Opcode::RET(OpcodeParameter::NoParam), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 0x1234);
assert_eq!(cpu.registers.get(Register::SP), sp + 2);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let sp = 0xD000;
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set(Register::SP, sp);
bus.write_16bit(sp, 0x1234);
cpu.exec(Opcode::RET(OpcodeParameter::FlagRegisterReset(FlagRegister::Zero)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 0x1234);
assert_eq!(cpu.registers.get(Register::SP), sp + 2);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let sp = 0xD000;
cpu.registers.set_flag(FlagRegister::Zero, true);
cpu.registers.set(Register::SP, sp);
bus.write_16bit(sp, 0x1234);
cpu.exec(Opcode::RET(OpcodeParameter::FlagRegisterReset(FlagRegister::Zero)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
assert_eq!(cpu.registers.get(Register::SP), sp);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let sp = 0xD000;
cpu.registers.set_flag(FlagRegister::Zero, true);
cpu.registers.set(Register::SP, sp);
bus.write_16bit(sp, 0x1234);
cpu.exec(Opcode::RET(OpcodeParameter::FlagRegisterSet(FlagRegister::Zero)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 0x1234);
assert_eq!(cpu.registers.get(Register::SP), sp + 2);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let sp = 0xD000;
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set(Register::SP, sp);
bus.write_16bit(sp, 0x1234);
cpu.exec(Opcode::RET(OpcodeParameter::FlagRegisterSet(FlagRegister::Zero)), &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
assert_eq!(cpu.registers.get(Register::SP), sp);
}
#[test]
fn test_and_instructions() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0xF1);
cpu.registers.set(Register::C, 0x1F);
cpu.exec(Opcode::AND(OpcodeParameter::Register_Register(Register::B, Register::C)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0xF1 & 0x1F);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0x00);
cpu.registers.set(Register::C, 0x00);
cpu.exec(Opcode::AND(OpcodeParameter::Register_Register(Register::B, Register::C)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x00);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::B, 0x1F);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0x1F);
cpu.exec(Opcode::AND(OpcodeParameter::Register_Register(Register::B, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x1F & 0x1F);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::B, 0x00);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0x00);
cpu.exec(Opcode::AND(OpcodeParameter::Register_Register(Register::B, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x00);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0x1F);
cpu.exec(Opcode::AND(OpcodeParameter::Register_U8(Register::B, 0x1A)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x1F & 0x1A);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0x00);
cpu.exec(Opcode::AND(OpcodeParameter::Register_U8(Register::B, 0x00)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x00);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_or_instructions() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0xF1);
cpu.registers.set(Register::C, 0x1F);
cpu.exec(Opcode::OR(OpcodeParameter::Register_Register(Register::B, Register::C)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0xF1 | 0x1F);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0x00);
cpu.registers.set(Register::C, 0x00);
cpu.exec(Opcode::OR(OpcodeParameter::Register_Register(Register::B, Register::C)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x00);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::B, 0x1F);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0x1F);
cpu.exec(Opcode::OR(OpcodeParameter::Register_Register(Register::B, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x1F | 0x1F);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::B, 0x00);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0x00);
cpu.exec(Opcode::OR(OpcodeParameter::Register_Register(Register::B, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x00);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0x1F);
cpu.exec(Opcode::OR(OpcodeParameter::Register_U8(Register::B, 0x1F)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x1F | 0x1F);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0x00);
cpu.exec(Opcode::OR(OpcodeParameter::Register_U8(Register::B, 0x00)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x00);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_xor_instructions() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0xF1);
cpu.registers.set(Register::C, 0x1F);
cpu.exec(Opcode::XOR(OpcodeParameter::Register_Register(Register::B, Register::C)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0xF1 ^ 0x1F);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0x00);
cpu.registers.set(Register::C, 0x00);
cpu.exec(Opcode::XOR(OpcodeParameter::Register_Register(Register::B, Register::C)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x00);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::B, 0x1F);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0xF1);
cpu.exec(Opcode::XOR(OpcodeParameter::Register_Register(Register::B, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x1F ^ 0xF1);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::B, 0x00);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0x00);
cpu.exec(Opcode::XOR(OpcodeParameter::Register_Register(Register::B, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x00);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0x1F);
cpu.exec(Opcode::XOR(OpcodeParameter::Register_U8(Register::B, 0xF1)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x1F ^ 0xF1);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0x00);
cpu.exec(Opcode::XOR(OpcodeParameter::Register_U8(Register::B, 0x00)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0x00);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_cp_instructions() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0xF1);
cpu.exec(Opcode::CP(OpcodeParameter::Register_U8(Register::B, 0xF1)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0b00110000);
cpu.exec(Opcode::CP(OpcodeParameter::Register_U8(Register::B, 0b00000100)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0b01000000);
cpu.exec(Opcode::CP(OpcodeParameter::Register_U8(Register::B, 0b10000000)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0xF1);
cpu.registers.set(Register::C, 0xF1);
cpu.exec(Opcode::CP(OpcodeParameter::Register_Register(Register::B, Register::C)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0b00110000);
cpu.registers.set(Register::C, 0b00000100);
cpu.exec(Opcode::CP(OpcodeParameter::Register_Register(Register::B, Register::C)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0b01000000);
cpu.registers.set(Register::C, 0b10000000);
cpu.exec(Opcode::CP(OpcodeParameter::Register_Register(Register::B, Register::C)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::B, 0xF1);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0xF1);
cpu.exec(Opcode::CP(OpcodeParameter::Register_Register(Register::B, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::B, 0b00110000);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0b00000100);
cpu.exec(Opcode::CP(OpcodeParameter::Register_Register(Register::B, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::B, 0b01000000);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0b10000000);
cpu.exec(Opcode::CP(OpcodeParameter::Register_Register(Register::B, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_add_instructions() {
// let mut bus = Bus::new();
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0b00001000);
cpu.registers.set(Register::C, 0b00001000);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_Register(Register::B, Register::C)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0b00010000);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0b10000000);
cpu.registers.set(Register::C, 0b10000000);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_Register(Register::B, Register::C)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0x00);
cpu.registers.set(Register::B, 0x80);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_Register(Register::A, Register::B)), &mut bus);
assert_eq!(cpu.registers.get(Register::A), 0x80);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::B, 40);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 40);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_Register(Register::B, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 80);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 40);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_U8(Register::B, 40)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 80);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::HL, addr);
bus.write(addr, 40);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_U8(Register::HL, 40)), &mut bus);
assert_eq!(bus.read(addr), 80);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 40);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_I8(Register::B, -40 as i8)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::SP, 0x0000);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_I8(Register::SP, 0x01)), &mut bus);
assert_eq!(cpu.registers.get(Register::SP), 0x0001);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.registers.set(Register::SP, 0x0100);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_I8(Register::SP, 0x01)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::SP), 0x0101);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::SP, 0x00FF);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_I8(Register::SP, 0x01)), &mut bus);
assert_eq!(cpu.registers.get(Register::SP), 0x0100);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::SP, 0x7FFF);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_I8(Register::SP, 0x01)), &mut bus);
assert_eq!(cpu.registers.get(Register::SP), 0x8000);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::SP, 0x000F);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_I8(Register::SP, 0x01)), &mut bus);
assert_eq!(cpu.registers.get(Register::SP), 0x0010);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::SP, 0xFFFF);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_I8(Register::SP, 0x01)), &mut bus);
assert_eq!(cpu.registers.get(Register::SP), 0x0000);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::SP, 0x0000);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_I8(Register::SP, (0xFF as u8) as i8)), &mut bus);
assert_eq!(cpu.registers.get(Register::SP), 0xFFFF);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::SP, 0x0001);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_I8(Register::SP, (0xFF as u8) as i8)), &mut bus);
assert_eq!(cpu.registers.get(Register::SP), 0x0000);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::BC, 0b0000100000000000);
cpu.registers.set(Register::HL, 0b0000100000000000);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_Register(Register::BC, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get(Register::BC), 0b0001000000000000);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::HL, 0x0000);
cpu.registers.set(Register::SP, 0x8000);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_Register(Register::HL, Register::SP)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::HL), 0x8000);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::HL, 0x0001);
cpu.registers.set(Register::SP, 0x00FF);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_Register(Register::HL, Register::SP)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::HL), 0x0100);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set_flag(FlagRegister::Zero, true);
cpu.registers.set_flag(FlagRegister::Substract, true);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.registers.set(Register::HL, 0x2608);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_Register(Register::HL, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::HL), 0x4C10);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.registers.set(Register::SP, 0x000F);
cpu.registers.set(Register::HL, 0x0001);
cpu.exec(Opcode::ADD(OpcodeParameter::Register_Register(Register::HL, Register::SP)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::HL), 0x0010);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_adc_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, true);
cpu.registers.set(Register::A, 0xFE);
cpu.exec(Opcode::ADC(OpcodeParameter::Register_U8(Register::A, 0x01)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::A), 0x00);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, true);
cpu.registers.set(Register::A, 0x00);
cpu.exec(Opcode::ADC(OpcodeParameter::Register_U8(Register::A, 0x0F)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0x10);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, true);
cpu.registers.set(Register::A, 0x01);
cpu.exec(Opcode::ADC(OpcodeParameter::Register_U8(Register::A, 0x0F)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0x11);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_sbc_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, true);
cpu.registers.set(Register::A, 0x00);
cpu.exec(Opcode::SBC(OpcodeParameter::Register_U8(Register::A, 0x00)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::A), 0xFF);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_sub_instructions() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0b00001000);
cpu.registers.set(Register::C, 0b00001000);
cpu.exec(Opcode::SUB(OpcodeParameter::Register_Register(Register::B, Register::C)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 0);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0b00010000);
cpu.registers.set(Register::C, 0b00011000);
cpu.exec(Opcode::SUB(OpcodeParameter::Register_Register(Register::B, Register::C)), &mut bus);
assert_eq!(cpu.registers.get(Register::B), 248);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let mut bus = Bus::new();
let addr = 0xC000;
cpu.registers.set(Register::B, 40);
cpu.registers.set(Register::HL, addr);
bus.write(addr, 40);
cpu.exec(Opcode::SUB(OpcodeParameter::Register_Register(Register::B, Register::HL)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get(Register::B), 0);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 40);
cpu.exec(Opcode::SUB(OpcodeParameter::Register_U8(Register::B, 40)), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get(Register::B), 0);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_inc_instructions() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0);
cpu.exec(Opcode::INC(true, false, Register::A), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00001111);
cpu.exec(Opcode::INC(true, false, Register::A), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0b00001111);
cpu.exec(Opcode::INC(true, true, Register::HL), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(bus.read(addr), 0b00010000);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::BC, 0b0000111111111111);
cpu.exec(Opcode::INC(true, false, Register::BC), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get(Register::BC), 0b0001000000000000);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_dec_instructions() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 1);
cpu.exec(Opcode::DEC(true, false, Register::A), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get(Register::A), 0);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00010000);
cpu.exec(Opcode::DEC(true, false, Register::A), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get(Register::A), 0b00001111);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0b00010000);
cpu.exec(Opcode::DEC(true, true, Register::HL), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(bus.read(addr), 0b00001111);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::BC, 0b0001000000000000);
cpu.exec(Opcode::DEC(true, false, Register::BC), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get(Register::BC), 0b0000111111111111);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_rla_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00000001);
cpu.registers.set_flag(FlagRegister::Carry, true);
cpu.exec(Opcode::RLA, &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0b00000011);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b10000000);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::RLA, &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::A), 0b00000000);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_rra_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00000001);
cpu.registers.set_flag(FlagRegister::Carry, true);
cpu.exec(Opcode::RRA, &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::A), 0b10000000);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b10000000);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::RRA, &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0b01000000);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_prefix_cb_rlc_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00000001);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RLC(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0b00000010);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b10000000);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RLC(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::A), 0b00000001);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RLC(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0b00000001);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RLC(Register::HL))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(bus.read(addr), 0b00000010);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_prefix_cb_rrc_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00000001);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RRC(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::A), 0b10000000);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00000010);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RRC(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0b00000001);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RRC(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0b00000001);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RRC(Register::HL))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(bus.read(addr), 0b10000000);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_prefix_cb_rl_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00000001);
cpu.registers.set_flag(FlagRegister::Carry, true);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RL(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0b00000011);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b10000000);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RL(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::A), 0b00000000);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00000010);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RL(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0b00000100);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
let addr = 0xC000;
bus.write(addr, 0b00000010);
cpu.registers.set(Register::HL, addr);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RL(Register::HL))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(bus.read(addr), 0b00000100);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_prefix_cb_rr_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00000001);
cpu.registers.set_flag(FlagRegister::Carry, true);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RR(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::A), 0b10000000);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b01000000);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RR(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0b00100000);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00000001);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RR(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::A), 0b00000000);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
let addr = 0xC000;
bus.write(addr, 0b01000000);
cpu.registers.set(Register::HL, addr);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RR(Register::HL))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(bus.read(addr), 0b00100000);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_prefix_cb_sla_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0x01);
cpu.registers.set_flag(FlagRegister::Zero, true);
cpu.registers.set_flag(FlagRegister::Substract, true);
cpu.registers.set_flag(FlagRegister::HalfCarry, true);
cpu.registers.set_flag(FlagRegister::Carry, true);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::SLA(Register::B))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::B), 0x02);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_prefix_cb_sra_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::B, 0x01);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, false);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::SRA(Register::B))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::B), 0x00);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_prefix_cb_srl_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00000010);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::SRL(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0b00000001);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00000001);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::SRL(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::A), 0b00000000);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
let addr = 0xC000;
bus.write(addr, 0b00000001);
cpu.registers.set(Register::HL, addr);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::SRL(Register::HL))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(bus.read(addr), 0b00000000);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_prefix_cb_swap_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b11110101);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::SWAP(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0b01011111);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b00000000);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::SWAP(Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0b00000000);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut bus = Bus::new();
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0b11110101);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::SWAP(Register::HL))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(bus.read(addr), 0b01011111);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_prefix_cb_bit_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b11110101);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I3, Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b11110101);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I4, Register::A))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0b11110101);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::BIT(BitIndex::I0 ,Register::HL))), &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_prefix_cb_res_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b11110101);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I2, Register::A))), &mut bus);
assert_eq!(cpu.registers.get_8bit(Register::A), 0b11110001);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0b11110101);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::RES(BitIndex::I0 ,Register::HL))), &mut bus);
assert_eq!(bus.read(addr), 0b11110100);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_prefix_cb_set_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0b11110101);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I1, Register::A))), &mut bus);
assert_eq!(cpu.registers.get_8bit(Register::A), 0b11110111);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
let mut cpu = CPU::new();
let addr = 0xC000;
cpu.registers.set(Register::HL, addr);
bus.write(addr, 0b11110101);
cpu.exec(Opcode::PrefixCB(Box::new(Opcode::SET(BitIndex::I3 ,Register::HL))), &mut bus);
assert_eq!(bus.read(addr), 0b11111101);
assert_eq!(cpu.registers.get(Register::PC), 0x102);
}
#[test]
fn test_daa_instruction() {
let mut bus = Bus::new();
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0x0A);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::DAA, &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::A), 0x10);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0x9A);
cpu.exec(Opcode::DAA, &mut bus);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
assert_eq!(cpu.registers.get(Register::A), 0x00);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0x00);
cpu.registers.set_flag(FlagRegister::Zero, false);
cpu.registers.set_flag(FlagRegister::Substract, false);
cpu.registers.set_flag(FlagRegister::HalfCarry, true);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::DAA, &mut bus);
assert_eq!(cpu.registers.get(Register::A), 0x06);
assert_eq!(cpu.registers.get_flag(FlagRegister::Zero), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
#[test]
fn test_cpl_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.registers.set(Register::A, 0b11110000);
cpu.exec(Opcode::CPL, &mut bus);
assert_eq!(cpu.registers.get(Register::A), 0b00001111);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), true);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), true);
}
#[test]
fn test_ccf_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.registers.set_flag(FlagRegister::Substract, true);
cpu.registers.set_flag(FlagRegister::HalfCarry, true);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::CCF, &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.registers.set_flag(FlagRegister::Substract, true);
cpu.registers.set_flag(FlagRegister::HalfCarry, true);
cpu.registers.set_flag(FlagRegister::Carry, true);
cpu.exec(Opcode::CCF, &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), false);
}
#[test]
fn test_scf_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.registers.set_flag(FlagRegister::Substract, true);
cpu.registers.set_flag(FlagRegister::HalfCarry, true);
cpu.registers.set_flag(FlagRegister::Carry, false);
cpu.exec(Opcode::SCF, &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
assert_eq!(cpu.registers.get_flag(FlagRegister::Substract), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::HalfCarry), false);
assert_eq!(cpu.registers.get_flag(FlagRegister::Carry), true);
}
#[test]
fn test_nop_instructions() {
let mut cpu = CPU::new();
let mut bus = Bus::new();
cpu.exec(Opcode::NOP, &mut bus);
assert_eq!(cpu.registers.get(Register::PC), 0x101);
}
}
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