Python subtract8_check_overflow Examples

Example #1

File: test_z80.py Project: da-raf/z80

 def test_subtraction_overflow_flag_2(self):
     res = util.subtract8_check_overflow(util.make_8bit_twos_comp(-10),
                                         util.make_8bit_twos_comp(10),
                                         self.registers)
     self.assertEqual(util.get_8bit_twos_comp(res), -20)
     self.assertFalse(self.registers.condition.PV)
     self.assertTrue(self.registers.condition.S)

Example #2

File: test_z80.py Project: cburbridge/z80

 def test_subtraction_overflow_flag_5(self):
     res = util.subtract8_check_overflow(util.make_8bit_twos_comp(100), util.make_8bit_twos_comp(-100),
               self.registers)
     self.assertTrue(self.registers.condition.PV)

Example #3

File: test_z80.py Project: cburbridge/z80

 def test_subtraction_overflow_flag_3(self):
     res = util.subtract8_check_overflow(util.make_8bit_twos_comp(-10), util.make_8bit_twos_comp(-10),
               self.registers)
     self.assertEqual(util.get_8bit_twos_comp(res), 0)
     self.assertFalse(self.registers.condition.PV)

Example #4

File: test_z80.py Project: da-raf/z80

 def test_subtraction_overflow_flag_5(self):
     res = util.subtract8_check_overflow(util.make_8bit_twos_comp(100),
                                         util.make_8bit_twos_comp(-100),
                                         self.registers)
     self.assertTrue(self.registers.condition.PV)