src/soc/decoder/power_svp64.py

   1 # SPDX-License-Identifier: LGPLv3+
   2 # Copyright (C) 2021 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
   3 # Funded by NLnet http://nlnet.nl
   4
   5 from soc.decoder.power_enums import get_csv, find_wiki_dir
   6 import os
   7
   8 # gets SVP64 ReMap information
   9 class SVP64RM:
  10     def __init__(self):
  11         self.instrs = {}
  12         pth = find_wiki_dir()
  13         for fname in os.listdir(pth):
  14             if fname.startswith("RM") or fname.startswith("LDSTRM"):
  15                 for entry in get_csv(fname):
  16                     self.instrs[entry['insn']] = entry
  17
  18
  19     def get_svp64_csv(self, fname):
  20         # first get the v3.0B entries
  21         v30b = get_csv(fname)
  22
  23         # now add the RM fields (for each instruction)
  24         for entry in v30b:
  25             # dummy (blank) fields, first
  26             entry.update({'EXTRA0': '0', 'EXTRA1': '0', 'EXTRA2': '0',
  27                           'EXTRA3': '0',
  28                           'SV_Ptype': 'NONE', 'SV_Etype': 'NONE'})
  29
  30             # is this SVP64-augmented?
  31             asmcode = entry['comment']
  32             if asmcode not in self.instrs:
  33                 continue
  34
  35             # start updating the fields, merge relevant info
  36             svp64 = self.instrs[asmcode]
  37             for k, v in {'EXTRA0': '0', 'EXTRA1': '1', 'EXTRA2': '2',
  38                           'EXTRA3': '3',
  39                           'SV_Ptype': 'Ptype', 'SV_Etype': 'Etype'}.items():
  40                 entry[k] = svp64[v]
  41
  42         return v30b
  43
  44 if __name__ == '__main__':
  45     isa = SVP64RM()
  46     minor_30 = isa.get_svp64_csv("minor_30.csv")
  47     for entry in minor_30:
  48         print (entry)