src/ieee754/fclass/test/test_fclass_pipe.py

   1 """ test of FPClassMuxInOut
   2 """
   3
   4 from ieee754.fclass.pipeline import (FPClassMuxInOut,)
   5 from ieee754.fpcommon.test.fpmux import runfp
   6 from ieee754.fpcommon.fpbase import FPFormat
   7
   8 import sfpy
   9 from sfpy import Float64, Float32, Float16
  10
  11 def fclass(wid, x):
  12     x = x.bits
  13     fmt = FPFormat.standard(wid)
  14     print (hex(x), "exp", fmt.get_exponent(x), fmt.emax,
  15                     "m", hex(fmt.get_mantissa(x)),
  16                     fmt.get_mantissa(x) & (1<<fmt.m_width-1))
  17     if fmt.is_inf(x):
  18         if fmt.get_sign(x):
  19             return 1<<0
  20         else:
  21             return 1<<7
  22     if fmt.is_zero(x):
  23         if fmt.get_sign(x):
  24             return 1<<3
  25         else:
  26             return 1<<4
  27     if fmt.get_exponent(x) == fmt.emax and fmt.get_mantissa(x) != 0:
  28         if fmt.is_nan_signalling(x):
  29             return 1<<8
  30         else:
  31             return 1<<9
  32     if fmt.is_subnormal(x) and fmt.get_mantissa(x) != 0:
  33         if fmt.get_sign(x):
  34             return 1<<2
  35         else:
  36             return 1<<5
  37     if fmt.get_sign(x):
  38         return 1<<1
  39     else:
  40         return 1<<6
  41
  42
  43 def fclass_16(x):
  44     return fclass(16, x)
  45
  46
  47 def test_class_pipe_f16():
  48     dut = FPClassMuxInOut(16, 16, 4, op_wid=1)
  49     runfp(dut, 16, "test_fcvt_class_pipe_f16", Float16, fclass_16,
  50                 True, n_vals=100)
  51
  52
  53 if __name__ == '__main__':
  54     for i in range(200):
  55         test_class_pipe_f16()