src/ieee754/fpcommon/basedata.py

   1 # IEEE Floating Point Adder (Single Precision)
   2 # Copyright (C) 2019 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
   3
   4 from nmigen import Signal
   5 from ieee754.fpcommon.getop import FPPipeContext
   6
   7
   8 class FPBaseData:
   9
  10     def __init__(self, pspec, n_ops=2):
  11         width = pspec.width
  12         self.ctx = FPPipeContext(pspec)
  13         ops = []
  14         for i in range(n_ops):
  15             name = chr(ord("a")+i)
  16             operand = Signal(width, name=name)
  17             setattr(self, name, operand)
  18             ops.append(operand)
  19         self.muxid = self.ctx.muxid # make muxid available here: complicated
  20         self.ops = ops
  21
  22     def eq(self, i):
  23         ret = []
  24         for op1, op2 in zip(self.ops, i.ops):
  25             ret.append(op1.eq(op2))
  26         ret.append(self.ctx.eq(i.ctx))
  27         return ret
  28
  29     def __iter__(self):
  30         if self.ops:
  31             yield from self.ops
  32         yield from self.ctx
  33
  34     def ports(self):
  35         return list(self)
  36
  37