def _translate_rol(self, tb, instruction):
        # Flags Affected
        # The CF flag contains the value of the bit shifted into it.
        # The OF flag is affected only for single-bit rotates (see
        # "Description" above); it is undefined for multi-bit rotates.
        # The SF, ZF, AF, and PF flags are not affected.

        oprnd0 = tb.read(instruction.operands[0])
        oprnd1 = tb.read(instruction.operands[1])

        size = tb.immediate(oprnd0.size, oprnd0.size)

        if self._arch_mode == ARCH_X86_MODE_32:
            count_mask = tb.immediate(0x1f, oprnd0.size)
        elif self._arch_mode == ARCH_X86_MODE_64:
            count_mask = tb.immediate(0x3f, oprnd0.size)

        count_masked = tb.temporal(oprnd0.size)
        count = tb.temporal(oprnd0.size)

        oprnd_ext = tb.temporal(oprnd0.size * 2)
        oprnd_ext_shifted = tb.temporal(oprnd0.size * 2)
        oprnd_ext_shifted_l = tb.temporal(oprnd0.size)
        oprnd_ext_shifted_h = tb.temporal(oprnd0.size)

        temp_count = tb.temporal(oprnd_ext.size)

        result = tb.temporal(oprnd0.size)
        result_msb = tb.temporal(1)

        tmp0 = tb.temporal(1)
        tmp0_zero = tb.temporal(1)

        imm0 = tb.immediate(1, oprnd0.size)
        imm1 = tb.immediate(-oprnd0.size, oprnd0.size * 2)
        imm2 = tb.immediate(-(oprnd0.size + 1), oprnd0.size)

        # Compute temp count.
        tb.add(self._builder.gen_str(oprnd1, count))
        tb.add(self._builder.gen_and(count, count_mask, count_masked))
        tb.add(self._builder.gen_mod(count_masked, size, temp_count))

        # Rotate register.
        tb.add(self._builder.gen_str(oprnd0, oprnd_ext))
        tb.add(self._builder.gen_bsh(oprnd_ext, temp_count, oprnd_ext_shifted))
        tb.add(self._builder.gen_bsh(oprnd_ext_shifted, imm1, oprnd_ext_shifted_h))
        tb.add(self._builder.gen_str(oprnd_ext_shifted, oprnd_ext_shifted_l))
        tb.add(self._builder.gen_or(oprnd_ext_shifted_l, oprnd_ext_shifted_h, result))

        # Compute CF.
        tb.add(self._builder.gen_str(result, self._flags["cf"]))

        # Compute OF.
        undef_of_lbl = tb.label('undef_of_lbl')

        tb.add(self._builder.gen_sub(count_masked, imm0, tmp0))
        tb.add(self._builder.gen_bisz(tmp0, tmp0_zero))
        tb.add(self._builder.gen_jcc(tmp0_zero, undef_of_lbl))

        # Compute.
        tb.add(self._builder.gen_bsh(result, imm2, result_msb))
        tb.add(self._builder.gen_xor(result_msb, self._flags["cf"], self._flags["of"]))

        # Undef OF.
        tb.add(undef_of_lbl)
        self._undefine_flag(tb, self._flags["of"])

        tb.write(instruction.operands[0], result)
dataset/ETHPy150Open programa-stic/barf-project/barf/barf/arch/x86/x86translator.py/X86Translator._translate_rol/original