src/soc/fu/ldst/pipe_data.py

   1 from soc.fu.ldst.ldst_input_record import CompLDSTOpSubset
   2 from soc.fu.pipe_data import FUBaseData, CommonPipeSpec
   3 from openpower.exceptions import LDSTException
   4
   5
   6 class LDSTInputData(FUBaseData):
   7     regspec = [('INT', 'ra', '0:63'), # RA
   8                ('INT', 'rb', '0:63'), # RB/immediate
   9                ('INT', 'rc', '0:63'), # RC
  10                # XXX TODO, later ('XER', 'xer_so', '32') # XER bit 32: SO
  11                ]
  12     def __init__(self, pspec):
  13         super().__init__(pspec, False)
  14         # convenience
  15         self.rs = self.rc
  16
  17
  18 class LDSTOutputData(FUBaseData):
  19     # these need to tie up with LDSTCompUnit.get_out index numbers
  20     # LDSTCompUnit is unusual in that it's non-standard to RegSpecAPI
  21     regspec = [('INT', 'o', '0:63'),   # RT
  22                ('INT', 'o1', '0:63'),  # RA (effective address, update mode)
  23                # TODO, later ('CR', 'cr_a', '0:3'),
  24                # TODO, later ('XER', 'xer_so', '32')
  25                 ]
  26     def __init__(self, pspec):
  27         super().__init__(pspec, True, LDSTException)
  28         # convenience
  29         self.cr0, self.ea = self.cr_a, self.o1
  30
  31
  32 class LDSTPipeSpec(CommonPipeSpec):
  33     regspec = (LDSTInputData.regspec, LDSTOutputData.regspec)
  34     opsubsetkls = CompLDSTOpSubset