Created
February 22, 2010 23:23
-
-
Save anonymous/311650 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/env python | |
import sys | |
class VM: | |
max_space = 32 | |
def __init__(self, program, initial_data): | |
self.program_store = list() | |
self.data_store = self.max_space*[0] | |
self.pc = 0 | |
self.in1 = 0 | |
self.in2 = 0 | |
self.acc = 0 | |
f = open(sys.argv[1]) | |
for line in f: | |
self.program_store.append(line.strip()) | |
f.close | |
for i, data in enumerate(sys.argv[2:]): | |
if i > (self.max_space - 1): | |
raise ValueError, "maximum of %d items"%self.max_space | |
self.data_store[i] = int(data) | |
def run(self): | |
while self.parse(self.program_store[self.pc]): | |
self.print_status() | |
def parse(self, input): | |
print input | |
inst, arg = input.rsplit(" ", 1) | |
if inst == "LOAD": | |
self.acc = self.data_store[int(arg)] | |
self.pc += 1 | |
elif inst == "STORE": | |
self.data_store[int(arg)] = self.acc | |
self.pc += 1 | |
elif inst == "ADD": | |
self.acc += self.data_store[int(arg)] | |
self.pc += 1 | |
elif inst == "SUB": | |
self.acc -= self.data_store[int(arg)] | |
self.pc += 1 | |
elif inst == "LOADI": | |
self.acc = int(arg) | |
self.pc += 1 | |
elif inst == "ADDI": | |
self.acc += int(arg) | |
self.pc += 1 | |
elif inst == "SUBI": | |
self.acc -= int(arg) | |
self.pc += 1 | |
elif inst == "LOADIN1": | |
self.acc = self.data_store[self.in1 + int(arg)] | |
self.pc += 1 | |
elif inst == "STOREIN1": | |
self.data_store[self.in1 + int(arg)] = self.acc | |
self.pc += 1 | |
elif inst == "MOVE ACC": | |
if arg == "IN1": | |
self.in1 = self.acc | |
elif arg == "IN2": | |
self.in2 = self.acc | |
else: | |
raise NotImplementedError | |
self.pc += 1 | |
elif inst == "MOVE IN1": | |
if arg == "ACC": | |
self.acc = self.in1 | |
elif arg == "IN2": | |
self.in2 = self.in1 | |
else: | |
raise NotImplementedError | |
self.pc += 1 | |
elif inst == "MOVE IN2": | |
if arg == "ACC": | |
self.acc = self.in2 | |
elif arg == "IN1": | |
self.in1 = self.in2 | |
else: | |
raise NotImplementedError | |
self.pc += 1 | |
elif inst == "JUMP": | |
self.pc += int(arg) | |
elif inst == "JUMP =": | |
if self.acc == 0: | |
self.pc += int(arg) | |
else: | |
self.pc += 1 | |
elif inst == "JUMP <": | |
if self.acc < 0: | |
self.pc += int(arg) | |
else: | |
self.pc += 1 | |
elif inst == "JUMP >": | |
if self.acc > 0: | |
self.pc += int(arg) | |
else: | |
self.pc += 1 | |
elif inst == "JUMP <>": | |
if self.acc != 0: | |
self.pc += int(arg) | |
else: | |
self.pc += 1 | |
elif inst == "JUMP <=": | |
if self.acc <= 0: | |
self.pc += int(arg) | |
else: | |
self.pc += 1 | |
elif inst == "JUMP >=": | |
if self.acc >= 0: | |
self.pc += int(arg) | |
else: | |
self.pc += 1 | |
elif inst == "STOP": | |
return False | |
elif inst == "NOP": | |
pass | |
else: | |
raise NotImplementedError | |
return True | |
def print_status(self): | |
print "ACC:", vm.acc, "PC:", vm.pc, "IN1:", vm.in1, "IN2:", vm.in2, "data_store", vm.data_store | |
if __name__ == "__main__": | |
vm = VM(sys.argv[1], sys.argv[2:]) | |
vm.print_status() | |
vm.run() | |
vm.print_status() |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment