src/soc/fu/ldst/pipe_data.py

   1 from nmigen import Signal, Const
   2 from soc.fu.alu.alu_input_record import CompLDSTOpSubset
   3 from soc.fu.pipe_data import IntegerData, CommonPipeSpec
   4 from ieee754.fpcommon.getop import FPPipeContext
   5 from soc.decoder.power_decoder2 import Data
   6
   7
   8 class LDSTInputData(IntegerData):
   9     regspec = [('INT', 'ra', '0:63'), # RA
  10                ('INT', 'rb', '0:63'), # RB/immediate
  11                ('INT', 'rc', '0:63'), # RC
  12                ('XER', 'xer_so', '32')] # XER bit 32: SO
  13                ]
  14     def __init__(self, pspec):
  15         super().__init__(pspec, False)
  16         # convenience
  17         self.rs = self.rc
  18
  19
  20 class LDSTOutputData(IntegerData):
  21     regspec = [('INT', 'o', '0:63'),   # RT
  22                ('INT', 'o1', '0:63'),  # RA (effective address, update mode)
  23                ('CR', 'cr_a', '0:3'),
  24                ('XER', 'xer_so', '32')]
  25     def __init__(self, pspec):
  26         super().__init__(pspec, True)
  27         # convenience
  28         self.cr0, self.ea = self.cr_a, self.o1
  29
  30
  31 class LDSTPipeSpec(CommonPipeSpec):
  32     regspec = (LDSTInputData.regspec, LDSTOutputData.regspec)
  33     opsubsetkls = CompLDSTOpSubset