src/soc/fu/spr/spr_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 CompSPROpSubset(Record):
   7     """CompSPROpSubset
   8
   9     a copy of the relevant subset information from Decode2Execute1Type
  10     needed for TRAP 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                   ('is_32bit', 1),
  18                   )
  19
  20         Record.__init__(self, Layout(layout), name=name)
  21
  22         # grrr.  Record does not have kwargs
  23         self.insn_type.reset_less = True
  24         self.insn.reset_less = True
  25         self.fn_unit.reset_less = True
  26         self.is_32bit.reset_less = True
  27
  28     def eq_from_execute1(self, other):
  29         """ use this to copy in from Decode2Execute1Type
  30         """
  31         res = []
  32         for fname, sig in self.fields.items():
  33             eqfrom = other.do.fields[fname]
  34             res.append(sig.eq(eqfrom))
  35         return res
  36
  37     def ports(self):
  38         return [self.insn_type,
  39                 self.insn,
  40                 self.fn_unit,
  41                 self.is_32bit,
  42         ]