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Day 5 part 2

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Wesley Moore 2019-12-07 14:44:38 +11:00
parent fb4c354aa9
commit 6cb3230d27
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1 changed files with 50 additions and 0 deletions
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50
2019/src/computer.rs
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@ -10,6 +10,10 @@ enum Instruction {
Multiply(Mode, Mode),
Input,
Output(Mode),
JumpIfTrue(Mode, Mode),
JumpIfFalse(Mode, Mode),
LessThan(Mode, Mode),
Equals(Mode, Mode),
Halt,
}
@ -41,6 +45,22 @@ fn decode(mut instruction: i32) -> Instruction {
),
3 => Instruction::Input,
4 => Instruction::Output(Mode::from(divmod(&mut instruction, 10))),
5 => Instruction::JumpIfTrue(
Mode::from(divmod(&mut instruction, 10)),
Mode::from(divmod(&mut instruction, 10)),
),
6 => Instruction::JumpIfFalse(
Mode::from(divmod(&mut instruction, 10)),
Mode::from(divmod(&mut instruction, 10)),
),
7 => Instruction::LessThan(
Mode::from(divmod(&mut instruction, 10)),
Mode::from(divmod(&mut instruction, 10)),
),
8 => Instruction::Equals(
Mode::from(divmod(&mut instruction, 10)),
Mode::from(divmod(&mut instruction, 10)),
),
99 => Instruction::Halt,
_ => panic!("Invalid opcode: {}", opcode),
}
@ -101,6 +121,36 @@ impl<'a> Memory<'a> {
println!("{}", value);
ip += 2;
}
Instruction::JumpIfTrue(mode1, mode2) => {
if self.read(ip + 1, mode1) != 0 {
ip = self.read(ip + 2, mode2);
} else {
ip += 3;
}
}
Instruction::JumpIfFalse(mode1, mode2) => {
if self.read(ip + 1, mode1) == 0 {
ip = self.read(ip + 2, mode2);
} else {
ip += 3;
}
}
Instruction::LessThan(mode1, mode2) => {
if self.read(ip + 1, mode1) < self.read(ip + 2, mode2) {
self.write(self.read(ip + 3, Mode::Immediate), 1);
} else {
self.write(self.read(ip + 3, Mode::Immediate), 0);
}
ip += 4;
}
Instruction::Equals(mode1, mode2) => {
if self.read(ip + 1, mode1) == self.read(ip + 2, mode2) {
self.write(self.read(ip + 3, Mode::Immediate), 1);
} else {
self.write(self.read(ip + 3, Mode::Immediate), 0);
}
ip += 4;
}
Instruction::Halt => break,
}
}