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#!/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.upper().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 == "LOADIN 2": | |
self.acc = self.data_store[self.in2 + int(arg)] | |
self.pc += 1 | |
elif inst == "STOREIN 2": | |
self.data_store[self.in2 + int(arg)] = self.acc | |
self.pc += 1 | |
elif inst == "LOADIN 1": | |
self.acc = self.data_store[self.in1 + int(arg)] | |
self.pc += 1 | |
elif inst == "STOREIN 1": | |
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() |
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