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AND, OR and XOR instructions

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This commit is contained in:
Franco Colmenarez 2021-10-16 22:38:13 -05:00
parent 12b43ee985
commit b098d28f0e
1 changed files with 288 additions and 0 deletions
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288
src/cpu.rs
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@ -392,6 +392,81 @@ impl CPU {
}, },
_ => {}, _ => {},
}, },
Opcode::AND(params) => match params {
OpcodeParameter::Register_Register(reg1, reg2) => {
self.registers.increment(Register::PC, 1);
match reg2.is_8bit() {
true => self.registers.set(reg1, self.registers.get(reg1) & self.registers.get(reg2)),
false => {
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);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, true);
self.registers.set_flag(FlagRegister::Carry, false);
},
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);
match reg2.is_8bit() {
true => self.registers.set(reg1, self.registers.get(reg1) | self.registers.get(reg2)),
false => {
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);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
self.registers.set_flag(FlagRegister::Carry, false);
},
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);
match reg2.is_8bit() {
true => self.registers.set(reg1, self.registers.get(reg1) ^ self.registers.get(reg2)),
false => {
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);
self.registers.set_flag(FlagRegister::Substract, false);
self.registers.set_flag(FlagRegister::HalfCarry, false);
self.registers.set_flag(FlagRegister::Carry, false);
},
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);
},
_ => {},
},
// Increment by 1 // Increment by 1
Opcode::INC(affect_flags, register) => { Opcode::INC(affect_flags, register) => {
let prev_value = self.registers.get(register); let prev_value = self.registers.get(register);
@ -1038,6 +1113,219 @@ mod tests {
assert_eq!(cpu.registers.get(Register::PC), 0x1234); assert_eq!(cpu.registers.get(Register::PC), 0x1234);
assert_eq!(cpu.registers.get(Register::SP), sp + 2); assert_eq!(cpu.registers.get(Register::SP), sp + 2);
// AND
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, 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), 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);
// OR
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);
// XOR
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);
// INC // INC
let mut cpu = CPU::new(); let mut cpu = CPU::new();
cpu.registers.set(Register::A, 0); cpu.registers.set(Register::A, 0);