src/decoder/power_enums.py

   1 from enum import Enum, unique
   2 import csv
   3 import os
   4 import requests
   5
   6
   7 def get_csv(name):
   8     file_dir = os.path.dirname(os.path.realpath(__file__))
   9     file_path = os.path.join(file_dir, name)
  10     if not os.path.isfile(file_path):
  11         url = 'https://libre-riscv.org/openpower/isatables/' + name
  12         r = requests.get(url, allow_redirects=True)
  13         with open(file_path, 'w') as outfile:
  14             outfile.write(r.content.decode("utf-8"))
  15     with open(file_path, 'r') as csvfile:
  16         reader = csv.DictReader(csvfile)
  17         return list(reader)
  18
  19
  20 # names of the fields in the tables that don't correspond to an enum
  21 single_bit_flags = ['CR in', 'CR out', 'inv A', 'inv out',
  22                     'cry out', 'BR', 'sgn ext', 'upd', 'rsrv', '32b',
  23                     'sgn', 'lk', 'sgl pipe']
  24
  25
  26 def get_signal_name(name):
  27     return name.lower().replace(' ', '_')
  28
  29
  30 @unique
  31 class Function(Enum):
  32     ALU = 0
  33     LDST = 1
  34
  35
  36 @unique
  37 class InternalOp(Enum):
  38     OP_ADD = 0
  39     OP_AND = 1
  40     OP_B = 2
  41     OP_BC = 3
  42     OP_CMP = 4
  43     OP_LOAD = 5
  44     OP_MUL_L64 = 6
  45     OP_OR = 7
  46     OP_RLC = 8
  47     OP_STORE = 9
  48     OP_TDI = 10
  49     OP_XOR = 11
  50     OP_MCRF = 12
  51     OP_BCREG = 13
  52     OP_ISYNC = 14
  53     OP_ILLEGAL = 15
  54
  55
  56 @unique
  57 class In1Sel(Enum):
  58     RA = 0
  59     RA_OR_ZERO = 1
  60     NONE = 2
  61     SPR = 3
  62
  63
  64 @unique
  65 class In2Sel(Enum):
  66     CONST_SI = 0
  67     CONST_SI_HI = 1
  68     CONST_UI = 2
  69     CONST_UI_HI = 3
  70     CONST_LI = 4
  71     CONST_BD = 5
  72     CONST_SH32 = 6
  73     RB = 7
  74     NONE = 8
  75     SPR = 9
  76
  77
  78 @unique
  79 class In3Sel(Enum):
  80     NONE = 0
  81     RS = 1
  82
  83
  84 @unique
  85 class OutSel(Enum):
  86     RT = 0
  87     RA = 1
  88     NONE = 2
  89     SPR = 3
  90
  91
  92 @unique
  93 class LdstLen(Enum):
  94     NONE = 0
  95     is1B = 1
  96     is2B = 2
  97     is4B = 3
  98
  99
 100 @unique
 101 class RC(Enum):
 102     NONE = 0
 103     ONE = 1
 104     RC = 2
 105
 106
 107 @unique
 108 class CryIn(Enum):
 109     ZERO = 0
 110     ONE = 1
 111     CA = 2