Created
August 27, 2021 03:16
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A toy assembler written in Python
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class Assembler: | |
def __init__(self, program): | |
self.program = program | |
self.registers = {} | |
self.program_counter = 0 | |
def run(self): | |
while self.program_counter < len(self.program): | |
fn_name, *args = self.program[self.program_counter].split(" ") | |
fn = getattr(self, fn_name) | |
fn(*args) | |
def increment_program_counter(fn): | |
def wrapper(self, *args): | |
fn(self, *args) | |
self.program_counter += 1 | |
return wrapper | |
@increment_program_counter | |
def mov(self, register, value): | |
self.registers[register] = self.register_to_value(value) | |
@increment_program_counter | |
def inc(self, register): | |
self.registers[register] += 1 | |
@increment_program_counter | |
def dec(self, register): | |
self.registers[register] -= 1 | |
def jnz(self, test_value, inc_value): | |
test_value = self.register_to_value(test_value) | |
inc_value = self.register_to_value(inc_value) | |
if test_value != 0: | |
self.program_counter += inc_value | |
else: | |
self.program_counter += 1 | |
def register_to_value(self, value): | |
if self.is_integer(value): | |
value = int(value) | |
else: | |
value = self.registers[value] | |
return value | |
def is_integer(self, n): | |
try: | |
float(n) | |
except ValueError: | |
return False | |
else: | |
return float(n).is_integer() |
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