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SimpleSimulator.py
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SimpleSimulator.py
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from sys import stdin
import matplotlib.pyplot as plt
hlt = "0101000000000000"
memory = {}
pc = 0
Cycle = -1
x_axis=[]
y_axis=[]
reg_val = {'000': 0, '001': 0, '010': 0, '011': 0, '100': 0, '101': 0, '110': 0, "111": 0}
def _16bitconvertor(n):
return format(n, "016b")
def _8bitconvertor(n):
return format(n, "08b")
def get_decimal(binary):
decimal = 0
i= 0
while(binary != 0):
dec = int(binary) % 10
decimal = decimal + dec * pow(2, i)
binary = int(binary)//10
i += 1
return int(decimal)
def dump():
for reg in reg_val.keys():
print(_16bitconvertor(reg_val[reg]), end=" ")
def flag_reset():
reg_val["111"] = 0
def plot():
plt.style.use('seaborn')
plt.scatter(x_axis,y_axis, cmap='YlGnBu', edgecolor='blue', linewidth=1, alpha=0.75)
plt.xlabel('Cycle number')
plt.ylabel('Memory address')
plt.tight_layout()
plt.show()
inputs=[]
for line in stdin:
if line=="" or line=="\n":
pass
else:
inputs.append(line.strip())
while (inputs[pc] != hlt):
Cycle += 1
print(_8bitconvertor(pc), end=" ")
command = inputs[pc]
opcode = command[:5]
reg = command[5:8]
imm = get_decimal(command[8:])
x_axis.append(Cycle)
y_axis.append(pc)
if (opcode != "10000"): # add
pass
else:
reg_val[command[13:]] = reg_val[command[7:10]] + reg_val[command[10:13]]
if reg_val[command[7:10]] <= 65535:
flag_reset()
else:
reg_val[command[7:10]] = reg_val[command[7:10]] % 65536
reg_val["111"] = 8
pc += 1
if (opcode != "10001"): # sub
pass
else:
reg_val[command[13:]] = reg_val[command[7:10]] - reg_val[command[10:13]]
if reg_val[command[7:10]] >= 0:
flag_reset()
else:
reg_val[command[7:10]] = 0
reg_val["111"] = 8
pc += 1
if (opcode != "10110"): # mul
pass
else:
reg_val[command[13:]] = reg_val[command[7:10]] * reg_val[command[10:13]]
if reg_val[command[7:10]] <= 65535:
flag_reset()
else:
reg_val[command[7:10]] = reg_val[command[7:10]] % 65536
reg_val["111"] = 8
pc += 1
if (opcode != "11100"): # and
pass
else:
reg_val[command[13:]] = reg_val[command[7:10]] and reg_val[command[10:13]]
flag_reset()
pc += 1
if (opcode != "11010"): # xor
pass
else:
reg_val[command[13:]] = reg_val[command[7:10]] ^ reg_val[command[10:13]]
flag_reset()
pc += 1
if (opcode != "11011"): # or
pass
else:
reg_val[command[13:]] = reg_val[command[7:10]] or reg_val[command[10:13]]
flag_reset()
pc += 1
if (opcode != "10010"): # movi
pass
else:
reg_val[reg] = imm
flag_reset()
pc += 1
if (opcode != "11000"): # rs
pass
else:
reg_val[reg] = reg_val[reg] >> imm
flag_reset()
pc += 1
if (opcode != "11001"): # ls
pass
else:
reg_val[reg] = reg_val[reg] << imm
if reg_val[reg] <= 65535:
flag_reset()
else:
reg_val[reg] = reg_val[reg] % 65536
reg_val["111"] = 8
pc += 1
register1 = command[10:13]
register2 = command[13:]
if (opcode != "10011"): # movr
pass
else:
reg_val[register2] = reg_val[register1]
flag_reset()
pc += 1
if (opcode != "10111"): # divide
pass
else:
reg_val["000"] = reg_val[register1] // reg_val[register2]
reg_val["001"] = reg_val[register1] % reg_val[register2]
flag_reset()
pc += 1
if (opcode != "11101"): # invert
pass
else:
reg_val[register2] = 65535 - reg_val[register1]
flag_reset()
pc += 1
if (opcode != "11110"): # compare
pass
else:
if (reg_val[register1] == reg_val[register2]):
reg_val["111"] = 1
elif (reg_val[register1] > reg_val[register2]):
reg_val["111"] = 2
elif (reg_val[register1] < reg_val[register2]):
reg_val["111"] = 4
pc += 1
if (opcode != "10100"): # load
pass
else:
if (command[8:] not in memory.keys()):
memory[command[8:]] = 0
reg_val[command[5:8]] = memory[command[8:]]
mem = int(inputs[pc][8:], 2)
y_axis.append(mem)
x_axis.append(Cycle)
flag_reset()
pc += 1
if (opcode != "10101"): # store
pass
else:
memory[command[8:]] = reg_val[command[5:8]]
mem = int(inputs[pc][8:], 2)
y_axis.append(mem)
x_axis.append(Cycle)
flag_reset()
pc += 1
mem = get_decimal(command[8:])
if opcode != "11111": # jmp
pass
else:
flag_reset()
pc = mem
if opcode != "01100": # jlt
pass
else:
if (reg_val["111"] != 4):
pc += 1
else:
pc = mem
flag_reset()
if opcode != "01101": # jgt
pass
else:
if (reg_val["111"] != 2):
pc += 1
else:
pc = mem
flag_reset()
if opcode != "01111": # je
pass
else:
if (reg_val["111"] != 1):
pc += 1
else:
pc = mem
flag_reset()
dump()
print()
flag_reset()
print(_8bitconvertor(pc), end=" ")
dump()
y_axis.append(pc)
Cycle += 1
x_axis.append(Cycle)
print()
i=0
while i<256:
if (i >= len(inputs)):
j = _8bitconvertor(i)
if(j in memory.keys()):
print(_16bitconvertor(memory[j]))
else:
print("0000000000000000")
else:
print(inputs[i])
i+=1
plot()