def fdiv_fun(virtual_machine):
"""Where dest, a, and b are registers."""
dest_register = binary.opcode_register_argument(virtual_machine, 1)
a_register = binary.opcode_register_argument(virtual_machine, 2)
b_register = binary.opcode_register_argument(virtual_machine, 3)
a_val = binary.to_float(virtual_machine.registers[a_register])
b_val = binary.to_float(virtual_machine.registers[b_register])
result = a_val / b_val
virtual_machine.registers[dest_register] = binary.to_int(result)
def comp_fun(virtual_machine):
"""This compares the two specified registers."""
register_a = binary.opcode_register_argument(virtual_machine, 1)
register_b = binary.opcode_register_argument(virtual_machine, 2)
value_a = virtual_machine.registers[register_a]
value_b = virtual_machine.registers[register_b]
if value_a == value_b:
virtual_machine.flags["EF"] = 1
else:
virtual_machine.flags["EF"] = 0
def add_fun(virtual_machine):
"""Where dest, a, and b are registers."""
dest_register = binary.opcode_register_argument(virtual_machine, 1)
a_register = binary.opcode_register_argument(virtual_machine, 2)
b_register = binary.opcode_register_argument(virtual_machine, 3)
result = (virtual_machine.registers[a_register] +
virtual_machine.registers[b_register])
if result // (2 ^ 64) != 0:
virtual_machine.flags["OF"] = 1
virtual_machine.registers[dest_register] = result % 2 ^ 64
def pop_fun(virtual_machine):
"""This pops the top value from the stack and places it in an register."""
dest_register = binary.opcode_register_argument(virtual_machine, 1)
stack_head = virtual_machine.registers["SHP"]
virtual_machine.registers[dest_register] = virtual_machine.stack[
stack_head]
virtual_machine.registers["SHP"] -= 1
def psh_fun(virtual_machine):
"""This pushes the register provided onto the stack."""
source_register = binary.opcode_register_argument(virtual_machine, 1)
stack_head = virtual_machine.registers["SHP"]
virtual_machine.stack[stack_head] = virtual_machine.registers[
source_register]
virtual_machine.registers["SHP"] += 1
def load_fun(virtual_machine):
"""This loads the address specified into a register."""
dest_register = binary.opcode_register_argument(virtual_machine, 1)
source_addr = binary.opcode_address_argument(virtual_machine, 2)
source_val = binary.get_int_64(virtual_machine, source_addr)
virtual_machine.registers[dest_register] = source_val
