src/soc/fu/cr/cr_input_record.py

   1 from nmigen.hdl.rec import Record, Layout
   2
   3 from soc.decoder.power_enums import (InternalOp, Function)
   4
   5
   6 class CompCROpSubset(Record):
   7     """CompCROpSubset
   8
   9     a copy of the relevant subset information from Decode2Execute1Type
  10     needed for CR operations.  use with eq_from_execute1 (below) to
  11     grab subsets.
  12     """
  13     def __init__(self, name=None):
  14         layout = (('insn_type', InternalOp),
  15                   ('fn_unit', Function),
  16                   ('insn', 32),
  17                   ('read_cr_whole', 1),
  18                   ('write_cr_whole', 1),
  19                   )
  20
  21         Record.__init__(self, Layout(layout), name=name)
  22
  23         # grrr.  Record does not have kwargs
  24         self.insn_type.reset_less = True
  25         self.insn.reset_less = True
  26         self.fn_unit.reset_less = True
  27         self.read_cr_whole.reset_less = True
  28         self.write_cr_whole.reset_less = True
  29
  30     def eq_from_execute1(self, other):
  31         """ use this to copy in from Decode2Execute1Type
  32         """
  33         res = []
  34         for fname, sig in self.fields.items():
  35             eqfrom = other.do.fields[fname]
  36             res.append(sig.eq(eqfrom))
  37         return res
  38
  39     def ports(self):
  40         return [self.insn_type,
  41                 self.insn,
  42                 self.fn_unit,
  43                 self.read_cr_whole,
  44                 self.write_cr_whole,
  45         ]