src/ieee754/fpcommon/postcalc.py

   1 # IEEE Floating Point Adder (Single Precision)
   2 # Copyright (C) Jonathan P Dawson 2013
   3 # 2013-12-12
   4
   5 from nmigen import Signal
   6 from ieee754.fpcommon.fpbase import Overflow, FPNumBaseRecord
   7 from ieee754.fpcommon.getop import FPPipeContext
   8
   9
  10 class FPPostCalcData:
  11
  12     def __init__(self, pspec, e_extra=False):
  13         width = pspec.width
  14         self.z = FPNumBaseRecord(width, False, e_extra, name="z")
  15         self.out_do_z = Signal(reset_less=True)
  16         self.oz = Signal(width, reset_less=True)
  17         self.of = Overflow()
  18         self.ctx = FPPipeContext(pspec)
  19         self.muxid = self.ctx.muxid
  20
  21     def __iter__(self):
  22         yield from self.z
  23         yield self.out_do_z
  24         yield self.oz
  25         yield from self.of
  26         yield from self.ctx
  27
  28     def eq(self, i):
  29         return [self.z.eq(i.z), self.out_do_z.eq(i.out_do_z), self.oz.eq(i.oz),
  30                 self.of.eq(i.of), self.ctx.eq(i.ctx)]