def _rep_prefix_begin(self, tb, instruction):
        # Define counter register.
        if self._arch_info.address_size == 16:
            counter = ReilRegisterOperand("cx", 16)
        elif self._arch_info.address_size == 32:
            counter = ReilRegisterOperand("ecx", 32)
        elif self._arch_info.address_size < 64:
            counter = ReilRegisterOperand("rcx", 64)
        else:
            raise Exception("Invalid address size: %d", self._arch_info.address_size)

        # Create labels.
        loop_start_lbl = Label('loop_start')

        # Define immediate registers.
        end_addr = ReilImmediateOperand((instruction.address + instruction.size) << 8, self._arch_info.address_size + 8)

        # Define temporary registers.
        counter_zero = tb.temporal(1)

        tb.add(loop_start_lbl)

        tb.add(self._builder.gen_bisz(counter, counter_zero))
        tb.add(self._builder.gen_jcc(counter_zero, end_addr))

        return counter, loop_start_lbl
dataset/ETHPy150Open programa-stic/barf-project/barf/barf/arch/x86/x86translator.py/X86Translator._rep_prefix_begin/operator `==` -> `<`