src/openpower/test_fpscr.py

   1 from openpower.fpscr import FPSCRState
   2 import unittest
   3
   4
   5 class TestFPSCR(unittest.TestCase):
   6     def test_smoke_test(self):
   7         """ test to ensure FPSCR isn't horribly broken -- not at all thorough -- a smoke-test """
   8         FPSCR = FPSCRState()
   9         self.assertEqual(FPSCR.RN, 0)
  10         FPSCR.RN = 3
  11         self.assertEqual(FPSCR.RN, 3)
  12         expected = 0x3
  13         self.assertEqual(FPSCR, expected)
  14         self.assertEqual(FPSCR.VXCVI, 0)
  15         self.assertEqual(FPSCR.VX, 0)
  16         FPSCR.VXCVI = 1
  17         self.assertEqual(FPSCR.VXCVI, 1)
  18         self.assertEqual(FPSCR.VX, 1)
  19         expected |= 1 << (64 - 55 - 1)
  20         expected |= 1 << (64 - 34 - 1)
  21         self.assertEqual(FPSCR, expected)
  22         self.assertEqual(FPSCR.FX, 0)
  23         FPSCR.FX = 1
  24         self.assertEqual(FPSCR.FX, 1)
  25         expected |= 1 << (64 - 32 - 1)
  26         self.assertEqual(FPSCR, expected)
  27         self.assertEqual(FPSCR.C, 0)
  28         FPSCR.C = 1
  29         self.assertEqual(FPSCR.C, 1)
  30         expected |= 1 << (64 - 47 - 1)
  31         self.assertEqual(FPSCR, expected)
  32         self.assertEqual(FPSCR.FPRF, 0b10000)
  33         self.assertEqual(FPSCR.FPCC, 0b0000)
  34         self.assertEqual(FPSCR.FE, 0)
  35         FPSCR.FE = 1
  36         self.assertEqual(FPSCR.FE, 1)
  37         expected |= 1 << (64 - 50 - 1)
  38         self.assertEqual(FPSCR, expected)
  39         self.assertEqual(FPSCR.FPRF, 0b10010)
  40         self.assertEqual(FPSCR.FPCC, 0b0010)
  41         self.assertEqual(FPSCR.VE, 0)
  42         self.assertEqual(FPSCR.VX, 1)
  43         self.assertEqual(FPSCR.FEX, 0)
  44         FPSCR.VE = 1
  45         self.assertEqual(FPSCR.VE, 1)
  46         self.assertEqual(FPSCR.FEX, 1)
  47         expected |= 1 << (64 - 56 - 1)
  48         expected |= 1 << (64 - 33 - 1)
  49         self.assertEqual(FPSCR, expected)
  50
  51
  52 if __name__ == "__main__":
  53     unittest.main()