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SimpleSimulator.py
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SimpleSimulator.py
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import sys
memory = ["0000000000000000"]*256 #memory list
register_file = [0,0,0,0,0,0,0,0]
halt = False #global halt
pc = 0 #global pc
temp = pc - 1
pointer = 1
def bin_dec(string):
l=[]
for i in string:
l.append(i)
l1=[int(x)for x in l]
l1.reverse()
d=0
for i in range(len(l1)):
d += (2**i)*l1[i]
return d
#cinversion function
def convertBinary_8(dec):
bin = ""
while dec > 0:
bin = str(dec % 2) + bin
dec = dec // 2
while (len(bin) < 8):
bin = "0" + bin
return bin
#conversion function
def convertBinary_16(dec):
bin = ""
while dec > 0:
bin = str(dec % 2) + bin
dec = dec // 2
while (len(bin) < 16):
bin = "0" + bin
return bin
def decimal_conv(ins,num):
s1={'0','1','2','3','4','5','6','7','8','9'}
s2=set(ins)
if s2.issubset(s1):
x=int(ins)
l=[]
while x>0:
r=x%num
x=x//num
l.append(r)
l.reverse()
lst=[str(v) for v in l]
l1=[]
for i in range(10,36):
l1.append(i)
l2=[]
for i in range(65,91):
l2.append(chr(i))
l3=[str(x) for x in l1]
d=dict(zip(l3,l2))
new_lst=[]
for i in lst:
if i in d:
new_lst.append(d[i])
else:
new_lst.append(i)
ans=''.join(new_lst)
return ans
else:
pass
def conv_int(string):
l=[]
for i in string:
l.append(i)
l1=[int(x)for x in l]
l1.reverse()
d=0
for i in range(len(l1)):
d += (2**i)*l1[i]
return d
def load(ins):
r1 = conv_int(ins[5:8])
memory_address = conv_int(ins[8:])
register_file[r1] = conv_int(memory[memory_address])
global temp
temp += 1
global pc
pc = pc + 1
register_file[7] = 0
#right inverted
def rightshift(ins):
r1 = conv_int(ins[5:8])
immediate = conv_int(ins[8:])
register_file[r1]=register_file[r1]>>immediate
global temp
temp += 1
global pc
pc = pc + 1
register_file[7] = 0
#immediate displacement
def move_immediate(ins):
dest_reg = conv_int(ins[5:8])
immediate = conv_int(ins[8:])
register_file[dest_reg] = immediate
global temp
temp += 1
global pc
pc = pc + 1
register_file[7] = 0
def compare(ins):
r1 = conv_int(ins[10:13])
r2 = conv_int(ins[13:])
value_r1 = register_file[r1]
value_r2 = register_file[r2]
if(value_r1 == value_r2):
register_file[7] = 1
elif(value_r1 > value_r2):
register_file[7] = 2
else:
register_file[7] = 4
global temp
temp += 1
global pc
pc = pc + 1
def jump(ins):
global pc
memory_address = conv_int(ins[8:])
pc = memory_address
register_file[7] = 0
def store(ins):
r1 = conv_int(ins[5:8])
memory_address = conv_int(ins[8:])
memory[memory_address] = convertBinary_16(register_file[r1])
global temp
temp += 1
global pc
pc = pc + 1
register_file[7] = 0
def jump_GT(ins):
global pc
global temp
if(register_file[7] == 2):
memory_address = conv_int(ins[8:])
pc = memory_address
else:
temp += 1
pc = pc + 1
register_file[7] = 0
def And(ins):
r1 = conv_int(ins[7:10])
r2 = conv_int(ins[10:13])
dest_reg = conv_int(ins[13:16])
and_register = (register_file[r1])&(register_file[r2])
register_file[dest_reg] = and_register
global temp
temp += 1
global pc
pc = pc + 1
register_file[7] = 0
def Not(ins):
r1 = int(ins[10:13])
dest_reg= int(ins[13:16])
x = register_file[r1]
negation_reg = 65535 - x
register_file[dest_reg] = negation_reg
global temp
temp += 1
global pc
pc = pc + 1
register_file[7] = 0
def jump_equal(ins):
global pc
global temp
if(register_file[7] == 1):
memory_address = conv_int(ins[8:])
pc = memory_address
else:
temp += 1
pc = pc + 1
register_file[7] = 0
def addition(ins):
r1= conv_int(ins[7:10])
r2 = conv_int(ins[10:13])
dest_reg = conv_int(ins[13:16])
sum_registers = register_file[r1] + register_file[r2]
if sum_registers < 65535:
register_file[dest_reg] = sum_registers
register_file[7] = 0
else:
register_file[dest_reg] = sum_registers % 65536
register_file[7] = 8
global temp
temp += 1
global pc
pc = pc + 1
def leftshift(ins):
r1 = conv_int(ins[5:8])
immediate = conv_int(ins[8:])
register_file[r1]=register_file[r1]<<immediate
global temp
temp += 1
global pc
pc = pc + 1
register_file[7] = 0
def subtraction(ins):
r1 = conv_int(ins[7:10])
r2 = conv_int(ins[10:13])
dest_reg = conv_int(ins[13:16])
diff_registers = register_file[r1] - register_file[r2]
if diff_registers >= 0 :
register_file[dest_reg] = diff_registers
register_file[7] = 0
else:
register_file[dest_reg] = 0
register_file[7] = 8
global temp
temp += 1
global pc
pc = pc + 1
def move_register(ins):
source_reg = conv_int(ins[10:13])
dest_reg = conv_int(ins[13:16])
register_file[dest_reg] = register_file[source_reg]
global temp
temp += 1
global pc
pc = pc + 1
register_file[7] = 0
def multiply(ins):
r1 = conv_int(ins[7:10])
r2 = conv_int(ins[10:13])
dest_reg = conv_int(ins[13:16])
product_register = register_file[r1] * register_file[r2]
if product_register < 65535:
register_file[dest_reg] = product_register
register_file[7] = 0
else:
register_file[dest_reg] = product_register % 65536
register_file[7] = 8
global temp
temp += 1
global pc
pc = pc + 1
def divide(ins):
r1 = conv_int(ins[10:13])
r2 = conv_int(ins[13:16])
register_file[0] = (register_file[r1])//(register_file[r2])
register_file[1] = (register_file[r1])%(register_file[r2])
global temp
temp += 1
global pc
pc = pc + 1
register_file[7] = 0
def Or(ins):
r1 = conv_int(ins[7:10])
r2 = conv_int(ins[10:13])
dest_reg = conv_int(ins[13:16])
or_register = (register_file[r1])|(register_file[r2])
register_file[dest_reg] = or_register
global temp
temp += 1
global pc
pc = pc + 1
register_file[7] = 0
def jump_LT(ins):
global pc
global temp
if(register_file[7] == 4):
memory_address = conv_int(ins[8:])
pc = memory_address
else:
temp += 1
pc = pc + 1
register_file[7] = 0
def xor(ins):
r1 = conv_int(ins[7:10])
r2 = conv_int(ins[10:13])
value_r1 = register_file[r1]
negation_r1 = 65535 - value_r1
dest_reg = conv_int(ins[13:16])
value_r2 = register_file[r2]
negation_r2 = 65535 - value_r2
xor_register = ((value_r1)&(negation_r2))|((negation_r1)&(value_r2))
register_file[dest_reg] = xor_register
global temp
temp += 1
global pc
pc = pc + 1
register_file[7] = 0
def hlt(ins):
register_file[7] = 0
global halt
halt = True
oper_array= [0,0,0,0,0,0,0,0,0,0,hlt,0,jump_LT,jump_GT,0,jump_equal,addition,subtraction,move_immediate,move_register,load,store,multiply,divide,rightshift,leftshift,xor,Or,And,Not,compare,jump]
input = sys.stdin.read()
fininp = input.split('\n')
instruct_lst=[]
for i in range (len(fininp)):
if (len(fininp[i])>0):
instruct_lst.append(fininp[i])
count = 0
for i in instruct_lst:
memory[count] = i
count += 1
#while loop printing alll instructsions
while (halt == False):
current = memory[pc]
s = convertBinary_8(pc)
print(s,end = " ")
ins_index = conv_int(current[0:5])
oper_array[ins_index](current)
for i in range(len(register_file)-1):
s = convertBinary_16(register_file[i])
print(s,end = " ")
s = convertBinary_16(register_file[7])
print(s)
pointer += 1
if(pointer == 0):
decimal_conv(register_file[0])
#printing the dumped mememory
for i in range (len(memory)):
print(memory[i])