src/soc/fu/base_input_record.py

   1 from nmigen.hdl.rec import Record, Layout
   2 from nmigen import Signal
   3
   4 # needed for SVP64 information at the pipeline
   5 from openpower.decoder.power_svp64_rm import sv_input_record_layout
   6
   7
   8 class CompOpSubsetBase(Record):
   9     """CompOpSubsetBase
  10
  11     base class of subset Operation information
  12     """
  13     def __init__(self, layout, name):
  14         if name is None:
  15             name = self.__class__.__name__
  16             print ("Subset name", name)
  17             assert name.startswith("Comp")
  18             assert name.endswith("OpSubset")
  19             name = name[4:-8].lower() + "_op"
  20
  21         layout = list(layout) + sv_input_record_layout
  22         Record.__init__(self, Layout(layout), name=name)
  23
  24         # grrr.  Record does not have kwargs
  25         for fname, sig in self.fields.items():
  26             sig.reset_less = True
  27
  28     def eq_from(self, other):
  29         """ use this to copy in from another CompRecord
  30         """
  31         res = []
  32         print ("eq_from self", self, self.fields)
  33         print ("        other", other, other.fields)
  34         for fname, sig in self.fields.items():
  35             eqfrom = other.fields[fname]
  36             res.append(sig.eq(eqfrom))
  37         return res
  38
  39     def eq_from_execute1(self, other):
  40         """ use this to copy in from Decode2Execute1Type
  41         """
  42         return self.eq_from(other)
  43
  44     def ports(self):
  45         res = []
  46         for fname, sig in self.fields.items():
  47             if isinstance(sig, Signal):
  48                 res.append(sig)
  49         return res