src/soc/fu/cr/pipe_data.py

   1 from nmigen import Signal, Const
   2 from ieee754.fpcommon.getop import FPPipeContext
   3 from soc.fu.pipe_data import IntegerData, CommonPipeSpec
   4 from soc.fu.alu.alu_input_record import CompALUOpSubset # TODO: replace
   5
   6
   7 class CRInputData(IntegerData):
   8     regspec = [('INT', 'a', '0:63'),
   9                ('CR', 'cr', '32')]
  10     def __init__(self, pspec):
  11         super().__init__(pspec)
  12         self.a = Signal(64, reset_less=True) # RA
  13         self.cr = Signal(32, reset_less=True) # CR in
  14
  15     def __iter__(self):
  16         yield from super().__iter__()
  17         yield self.a
  18         yield self.cr
  19
  20     def eq(self, i):
  21         lst = super().eq(i)
  22         return lst + [self.a.eq(i.a),
  23                       self.cr.eq(i.cr)]
  24
  25 class CROutputData(IntegerData):
  26     regspec = [('INT', 'o', '0:63'),
  27                ('CR', 'cr', '32')]
  28     def __init__(self, pspec):
  29         super().__init__(pspec)
  30         self.o = Signal(64, reset_less=True) # RA
  31         self.cr = Signal(32, reset_less=True, name="cr_out") # CR in
  32
  33     def __iter__(self):
  34         yield from super().__iter__()
  35         yield self.o
  36         yield self.cr
  37
  38     def eq(self, i):
  39         lst = super().eq(i)
  40         return lst + [self.o.eq(i.o),
  41                       self.cr.eq(i.cr)]
  42
  43 # TODO: replace CompALUOpSubset with CompCROpSubset
  44 class CRPipeSpec(CommonPipeSpec):
  45     regspec = (CRInputData.regspec, CROutputData.regspec)
  46     opsubsetkls = CompALUOpSubset