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Implement day 23.

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Could use some optimization, but it works.
This commit is contained in:
Bert Peters
2018-11-14 12:50:53 +01:00
parent 0132627341
commit b35d785d69
4 changed files with 140 additions and 24 deletions
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87
2016/src/common.rs
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@@ -101,34 +101,73 @@ impl AssemBunnyCPU {
let mut iptr: i32 = 0;
while iptr < self.instructions.len() as i32 {
let ref instruction = self.instructions[iptr as usize];
match instruction[0].as_ref() {
"cpy" => {
let val = self.get_value(&instruction[1]);
let dest = register_num(&instruction[2]).unwrap();
self.registers[dest] = val;
},
"jnz" => {
let val = self.get_value(&instruction[1]);
if val != 0 {
let jump: i32 = instruction[2].parse().unwrap();
iptr += jump;
continue;
}
},
"inc" => {
let dest = register_num(&instruction[1]).unwrap();
self.registers[dest] += 1;
},
"dec" => {
let dest = register_num(&instruction[1]).unwrap();
self.registers[dest] -= 1;
},
_ => panic!("Invalid instruction: {:?}", instruction),
let mut instruction_target = 0;
let mut new_instruction = Vec::new();
{
let ref instruction = self.instructions[iptr as usize];
match instruction[0].as_ref() {
"cpy" => {
let val = self.get_value(&instruction[1]);
match register_num(&instruction[2]) {
Some(num) => { self.registers[num] = val; },
None => {
// Invalid instruction generated.
},
}
},
"jnz" => {
let val = self.get_value(&instruction[1]);
if val != 0 {
let jump: i32 = self.get_value(&instruction[2]);
iptr += jump;
continue;
}
},
"inc" => {
match register_num(&instruction[1]) {
Some(num) => { self.registers[num] += 1 },
None => {
// Invalid instruction generated.
},
}
},
"dec" => {
match register_num(&instruction[1]) {
Some(num) => { self.registers[num] -= 1; },
None => {
// Invalid instruction generated.
},
}
},
"tgl" => {
instruction_target = (iptr + self.get_value(&instruction[1])) as usize;
if instruction_target < self.instructions.len() {
new_instruction = self.instructions[instruction_target].clone();
new_instruction[0] = String::from(match new_instruction.len() {
2 => match new_instruction[0].as_str() {
"inc" => "dec",
_ => "inc",
}
3 => match new_instruction[0].as_str() {
"jnz" => "cpy",
_ => "jnz",
},
_ => panic!("Cannot toggle instruction {}", instruction_target),
});
}
},
_ => panic!("Invalid instruction: {:?}", instruction),
}
}
iptr += 1;
// Check if we need to override an instruction
if new_instruction.len() != 0 {
self.instructions[instruction_target] = new_instruction;
}
}
self.get_value("a")
}
}