def memory():
if(setup.flag == 3):
if not ((int(setup.inst[4:], 0) & 0xFF) == 0x11):
print("MEMORY: No memory operation ")
helper.write_to_out("MEMORY: No memory operation \n")
setup.gui.editor("MEMORY: No memory operation \n")
elif setup.cond == 14:
if setup.op_code == 24:
k = setup.secondOperand//4
print("MEMORY: Load %d from memory " % (setup.temp.get(setup.firstOperand)[k]))
helper.write_to_out("MEMORY: Load "+str(setup.temp.get(setup.firstOperand)[k])+" from memory \n")
setup.gui.editor("MEMORY: Load "+str(setup.temp.get(setup.firstOperand)[k])+" from memory \n")
elif setup.op_code == 25:
print("MEMORY: Store %d in memory " % setup.destination)
helper.write_to_out("MEMORY: Store "+str(setup.destination)+" in memory \n")
setup.gui.editor("MEMORY: Store "+str(setup.destination)+" in memory \n")
else:
print("MEMORY: No memory operation ")
helper.write_to_out("MEMORY: No memory operation \n")
setup.gui.editor("MEMORY: No memory operation \n")
else:
print("MEMORY: No memory operation ")
helper.write_to_out("MEMORY: No memory operation \n")
setup.gui.editor("MEMORY: No memory operation \n")
def decode():
address = setup.inst[0:4]
instruction = int(setup.inst[4:], 0)
setup.flag = (instruction >> 26) & 0x3
setup.cond = (instruction >> 28) & 0xF
if setup.flag==0 :
setup.op_code = (instruction >> 21) & 0xF
setup.immediate = (instruction >> 25) & 0x1
setup.firstOperand = (instruction >> 16) & 0xF
setup.destination = (instruction >> 12) & 0xF
if setup.immediate ==0:
setup.secondOperand = instruction & 0xF
print("DECODE: Operation is %s, First Operand is R%d, Second Operand is R%d, Destination Register is R%d \nRead Registers: R%d = %d, R%d = %d" % (setup.op_to_instruction.get(setup.op_code),
setup.firstOperand, setup.secondOperand, setup.destination, setup.firstOperand,
setup.registers[setup.firstOperand], setup.secondOperand, setup.registers[setup.secondOperand]))
helper.write_to_out("DECODE: Operation is "+ str(setup.op_to_instruction.get(setup.op_code))+ ", First Operand is R"+ str(setup.firstOperand) + ", Second Operand is R"+ str(setup.secondOperand)+ ", Destination Register is R"+ str(setup.destination)+ " \nRead Registers: R"+ str(setup.firstOperand)+ " = "+ str(setup.registers[setup.firstOperand]) + ", R"+ str(setup.secondOperand) + " = " + str(setup.registers[setup.secondOperand])+"\n")
setup.gui.editor("DECODE: Operation is "+ str(setup.op_to_instruction.get(setup.op_code))+ ", First Operand is R"+ str(setup.firstOperand) + ", Second Operand is R"+ str(setup.secondOperand)+ ", Destination Register is R"+ str(setup.destination)+ " \nRead Registers: R"+ str(setup.firstOperand)+ " = "+ str(setup.registers[setup.firstOperand]) + ", R"+ str(setup.secondOperand) + " = " + str(setup.registers[setup.secondOperand])+"\n")
elif setup.immediate == 1:
setup.secondOperand = instruction & 0xFF
print("DECODE: Operation is %s, First Operand is R%d, immediate Second Operand is %d, Destination Register is R%d \nRead Registers: R%d = %d" %
(setup.op_to_instruction.get(setup.op_code), setup.firstOperand, setup.secondOperand, setup.destination, setup.firstOperand,setup.registers[setup.firstOperand]))
helper.write_to_out("DECODE: Operation is "+ str(setup.op_to_instruction.get(setup.op_code))+ ", First Operand is R"+ str(setup.firstOperand) + ", immediate Second Operand is "+ str(setup.secondOperand)+ ", Destination Register is R"+ str(setup.destination)+ " \nRead Registers: R"+ str(setup.firstOperand)+ " = "+ str(setup.registers[setup.firstOperand]) + "\n")
setup.gui.editor("DECODE: Operation is "+ str(setup.op_to_instruction.get(setup.op_code))+ ", First Operand is R"+ str(setup.firstOperand) + ", immediate Second Operand is "+ str(setup.secondOperand)+ ", Destination Register is R"+ str(setup.destination)+ " \nRead Registers: R"+ str(setup.firstOperand)+ " = "+ str(setup.registers[setup.firstOperand]) + "\n")
elif setup.flag == 1:
setup.op_code = (instruction >> 20) & 0x3F
setup.firstOperand = (instruction >> 16) & 0xF
setup.secondOperand = instruction & 0xFFF
setup.destination = (instruction >> 12) & 0xF
print("DECODE: Operation is %s, Base Register is R%d, Offset is %d, Destination Register is R%d " %
(setup.op_to_instruction.get(setup.op_code), setup.firstOperand, setup.secondOperand, setup.destination))
helper.write_to_out("DECODE: Operation is "+str(setup.op_to_instruction.get(setup.op_code))+", Base Register is R" + str(setup.firstOperand) +", Offset is "+str(setup.secondOperand)+", Destination Register is R"+str(setup.destination)+"\n")
setup.gui.editor("DECODE: Operation is "+str(setup.op_to_instruction.get(setup.op_code))+", Base Register is R" + str(setup.firstOperand) +", Offset is "+str(setup.secondOperand)+", Destination Register is R"+str(setup.destination)+"\n")
elif setup.flag == 2:
setup.op_code = (instruction >> 24) & 0x3
setup.offset = instruction & 0xFFFFFF
#print ("-------", setup.cond)
print("DECODE: Operation is %s" %
setup.cond_to_instruction.get(setup.cond))
helper.write_to_out("DECODE: Operation is "+str(setup.cond_to_instruction.get(setup.cond))+"\n")
setup.gui.editor("DECODE: Operation is "+str(setup.cond_to_instruction.get(setup.cond))+"\n")
elif setup.flag == 3:
mask = instruction & 0xFF
print("DECODE: Operation is %s " % (setup.swi.get(mask)) + "\n")
helper.write_to_out("DECODE: Operation is %s " % (setup.swi.get(mask)) + "\n")
setup.gui.editor("DECODE: Operation is %s " % (setup.swi.get(mask)) + "\n")
def step_into():
fetch()
decode()
execute()
memory()
write_back()
helper.write_to_out("\n")
def run_arm_simulator():
while not(setup.flag == 3 and (int(setup.inst[4:], 0) & 0xFF) == 0x11):
fetch()
decode()
execute()
memory()
write_back()
helper.write_to_out("\n")
def write_back():
if setup.flag == 0:
if setup.op_code != 10:
setup.registers[setup.destination] = setup.result
print("WRITEBACK: write %d to R%d \n" % (setup.result, setup.destination))
helper.write_to_out("WRITEBACK: write "+str(setup.result)+" to R"+str(setup.destination)+" \n")
setup.gui.editor("WRITEBACK: write "+str(setup.result)+" to R"+str(setup.destination)+" \n")
else:
print("WRITEBACK: no writeback required \n")
helper.write_to_out("WRITEBACK: no writeback required \n")
setup.gui.editor("WRITEBACK: no writeback required \n")
elif setup.flag == 1:
if setup.op_code == 25:
setup.registers[setup.destination] = setup.result
print("WRITEBACK: write %d to R%d \n" % (setup.result, setup.destination))
helper.write_to_out("WRITEBACK: write "+str(setup.result)+" to R"+str(setup.destination)+" \n")
setup.gui.editor("WRITEBACK: write "+str(setup.result)+" to R"+str(setup.destination)+" \n")
elif setup.op_code == 24:
k = setup.secondOperand//4
setup.temp.get(setup.firstOperand)[k] = setup.registers[setup.destination]
print("WRITEBACK: write %d to memory array" % setup.temp.get(setup.firstOperand)[k])
helper.write_to_out("WRITEBACK: write "+str(setup.temp.get(setup.firstOperand)[k])+" to memory array \n")
setup.gui.editor("WRITEBACK: write "+str(setup.temp.get(setup.firstOperand)[k])+" to memory array \n")
elif setup.flag == 2:
print("WRITEBACK: No writeback operation required \n")
helper.write_to_out("WRITEBACK: No writeback operation required \n")
setup.gui.editor("WRITEBACK: No writeback operation required \n")
elif setup.flag == 3:
mask = int(setup.inst[4:], 0) & 0xFF
if mask == 0x11:
print("EXIT: \n")
helper.write_to_out("EXIT: \n")
setup.gui.editor("EXIT: \n")
elif mask == 0x6C:
helper.read()
print("WRITEBACK: %s is Read from Console and stored in Register 0" % str(setup.registers[0]))
helper.write_to_out("WRITEBACK: %s is Read from File and stored in Register 0" % str(setup.registers[0]))
setup.gui.editor("WRITEBACK: %s is Read from File and stored in Register 0" % str(setup.registers[0]))
elif mask == 0x6B:
helper.write()
print("WRITEBACK: %s is Written to Console from Register 1" % str(setup.registers[1]))
helper.write_to_out("WRITEBACK: %s is Written to Console from Register 1" % str(setup.registers[1]))
setup.gui.editor("WRITEBACK: %s is Written to Console from Register 1" % str(setup.registers[1]))
setup.gui.registers()
def fetch():
setup.inst = helper.get_next_instruction(setup)
print(setup.inst)
print("FETCH instruction %s from address %s" % (setup.inst[4:], setup.inst[0:3]))
helper.write_to_out("FETCH instruction "+ str(setup.inst[4:])+" from address "+str(setup.inst[0:3]+"\n"))
setup.gui.editor("FETCH instruction "+ str(setup.inst[4:])+" from address "+str(setup.inst[0:3]+"\n"))
def execute():
setup.result = 0
if setup.flag == 0:
if setup.immediate == 0:
if setup.op_code == 0:
helper.print_execute(0)
setup.result = setup.registers[setup.firstOperand] & setup.registers[setup.secondOperand]
elif setup.op_code == 1:
helper.print_execute(1)
setup.result = setup.registers[setup.firstOperand] ^ setup.registers[setup.secondOperand]
elif setup.op_code == 2:
helper.print_execute(2)
setup.result = setup.registers[setup.firstOperand] - setup.registers[setup.secondOperand]
elif setup.op_code == 4:
helper.print_execute(4)
setup.result = setup.registers[setup.firstOperand] + setup.registers[setup.secondOperand]
elif setup.op_code == 5:
helper.print_execute(5)
setup.result = setup.registers[setup.firstOperand] + setup.registers[setup.secondOperand]
elif setup.op_code == 10:
helper.print_execute(10)
if setup.registers[setup.firstOperand] == setup.registers[setup.secondOperand]:
setup.result = 0
setup.f1=1
elif setup.registers[setup.firstOperand] < setup.registers[setup.secondOperand]:
setup.result = -1
setup.f2=1
else:
setup.result = 1
elif setup.op_code == 12:
helper.print_execute(12)
setup.result = setup.registers[setup.firstOperand] | setup.registers[setup.secondOperand]
elif setup.op_code == 13:
print ("EXECUTE: MOV value of R%d in R%d " % (setup.secondOperand, setup.destination))
helper.write_to_out("EXECUTE: MOV value of R" + str(setup.secondOperand) + " in R" + str(setup.destination) + "\n")
setup.gui.editor("EXECUTE: MOV value of R" + str(setup.secondOperand) + " in R" + str(setup.destination) + "\n")
setup.result = setup.registers[setup.secondOperand]
elif setup.op_code == 15:
print ("EXECUTE: MNV NOT of R%d in R%d " % (setup.secondOperand, setup.destination))
setup.result = ~setup.registers[setup.secondOperand]
helper.write_to_out("EXECUTE: MNV NOT of R" + str(setup.secondOperand) + " in R" + str(setup.destination) + "\n")
setup.gui.editor("EXECUTE: MNV NOT of R" + str(setup.secondOperand) + " in R" + str(setup.destination) + "\n")
elif setup.immediate == 1:
if setup.op_code == 0:
helper.print_execute_imm(0)
setup.result = setup.registers[setup.firstOperand] & setup.secondOperand
elif setup.op_code == 1:
helper.print_execute_imm(1)
setup.result = setup.registers[setup.firstOperand] ^ setup.secondOperand
elif setup.op_code == 2:
helper.print_execute_imm(2)
setup.result = setup.registers[setup.firstOperand] - setup.secondOperand
elif setup.op_code == 4:
helper.print_execute_imm(4)
setup.result = setup.registers[setup.firstOperand] + setup.secondOperand
elif setup.op_code == 5:
helper.print_execute_imm(5)
setup.result = setup.registers[setup.firstOperand] + setup.secondOperand
elif setup.op_code == 10:
helper.print_execute_imm(10)
if setup.registers[setup.firstOperand] == setup.secondOperand:
setup.result = 0
setup.f1 = 1
elif setup.registers[setup.firstOperand] < setup.secondOperand:
setup.result = -1
setup.f2 = 1
else:
setup.result = 1
elif setup.op_code == 12:
helper.print_execute_imm(12)
setup.result = setup.registers[setup.firstOperand] | setup.secondOperand
elif setup.op_code == 13:
print ("EXECUTE: MOV value of %d in R%d " % (setup.secondOperand, setup.destination))
helper.write_to_out("EXECUTE: MOV value of " + str(setup.secondOperand) + " in R" + str(setup.destination) + "\n")
setup.gui.editor("EXECUTE: MOV value of " + str(setup.secondOperand) + " in R" + str(setup.destination) + "\n")
setup.result = setup.secondOperand
elif setup.op_code == 15:
print ("EXECUTE: MNV NOT of %d in R%d " % (setup.secondOperand, setup.destination))
setup.gui.editor("EXECUTE: MNV NOT of "+ str(setup.secondOperand) +" in R"+ str(setup.destination) +"\n")
setup.result = ~setup.secondOperand
elif setup.flag == 1:
if setup.op_code == 25:
k = setup.secondOperand // 4
helper.print_execute_ld(k)
setup.result = setup.temp.get(setup.firstOperand)[k]
elif setup.op_code == 24:
k = setup.secondOperand // 4
helper.print_execute_str(k)
elif setup.flag == 2:
if setup.op_code == 2:
bit = ((setup.offset >> 23) & 1)
if bit == 1:
setup.sig = (0xFF000000 | setup.offset)*4
setup.sig = 0-(helper.invert(setup.sig))
else:
setup.sig = setup.offset*4
helper.print_execute_offset(setup.cond)
if setup.cond == 0:
if setup.f1 == 1:
setup.registers[15] = setup.registers[15] + 4 + setup.sig
elif setup.cond == 1:
if setup.f1 != 1:
setup.registers[15] = setup.registers[15] + 4 + setup.sig
elif setup.cond == 11:
if setup.f2 == 1 and setup.f1 == 0:
setup.registers[15] = setup.registers[15] + 4 + setup.sig
elif setup.cond == 12:
if setup.f1 == 0 and setup.f2 == 0:
setup.registers[15] = setup.registers[15] + 4 + setup.sig
elif setup.cond == 13:
if setup.f1 == 1 or setup.f2 == 1:
setup.registers[15] = setup.registers[15] + 4 + setup.sig
elif setup.cond == 14:
setup.registers[15] = setup.registers[15] + 4 + setup.sig
elif setup.cond == 10:
if setup.f1 == 1 or setup.f2 == 0:
setup.registers[15] = setup.registers[15] + 4 + setup.sig
elif setup.flag == 3 and (int(setup.inst[4:], 0) & 0xFF) != 0x11:
print("EXECUTE: No Execution \n")
helper.write_to_out("EXECUTE: No Execution \n")
setup.gui.editor("EXECUTE: No Execution \n")