1 from enum
import Enum
, unique
4 from os
.path
import dirname
, join
5 from collections
import namedtuple
8 def find_wiki_file(name
):
9 filedir
= os
.path
.dirname(os
.path
.abspath(__file__
))
10 basedir
= dirname(dirname(dirname(filedir
)))
11 tabledir
= join(basedir
, 'libreriscv')
12 tabledir
= join(tabledir
, 'openpower')
13 tabledir
= join(tabledir
, 'isatables')
15 file_path
= join(tabledir
, name
)
20 file_path
= find_wiki_file(name
)
21 with
open(file_path
, 'r') as csvfile
:
22 reader
= csv
.DictReader(csvfile
)
26 # names of the fields in the tables that don't correspond to an enum
27 single_bit_flags
= ['inv A', 'inv out',
28 'cry out', 'BR', 'sgn ext', 'rsrv', '32b',
29 'sgn', 'lk', 'sgl pipe']
31 # default values for fields in the table
32 default_values
= {'unit': "NONE", 'internal op': "OP_ILLEGAL",
33 'in1': "RA", 'in2': 'NONE', 'in3': 'NONE', 'out': 'NONE',
37 'rc': 'NONE', 'cry in': 'ZERO', 'form': 'NONE'}
40 def get_signal_name(name
):
43 return name
.lower().replace(' ', '_')
45 # this corresponds to which Function Unit (pipeline-with-Reservation-Stations)
46 # is to process and guard the operation. they are roughly divided by having
47 # the same register input/output signature (X-Form, etc.)
97 # supported instructions: make sure to keep up-to-date with CSV files
98 # just like everything else
100 "NONE", "add", "addc", "addco", "adde", "addeo", "addi", "addic", "addic.",
101 "addis", "addme", "addmeo", "addo", "addze", "addzeo", "and", "andc",
102 "andi.", "andis.", "attn", "b", "bc", "bcctr", "bclr", "bctar",
103 "bpermd", "cmp", "cmpb", "cmpeqb", "cmpi", "cmpl", "cmpli", "cmprb",
104 "cntlzd", "cntlzw", "cnttzd", "cnttzw", "crand", "crandc", "creqv",
105 "crnand", "crnor", "cror", "crorc", "crxor", "darn", "dcbf", "dcbst",
106 "dcbt", "dcbtst", "dcbz", "divd", "divde", "divdeo", "divdeu",
107 "divdeuo", "divdo", "divdu", "divduo", "divw", "divwe", "divweo",
108 "divweu", "divweuo", "divwo", "divwu", "divwuo", "eqv", "extsb",
109 "extsh", "extsw", "extswsli", "hrfid", "icbi", "icbt", "isel", "isync",
110 "lbarx", "lbz", "lbzu", "lbzux", "lbzx", "ld", "ldarx", "ldbrx",
111 "ldu", "ldux", "ldx", "lha", "lharx", "lhau", "lhaux", "lhax",
112 "lhbrx", "lhz", "lhzu", "lhzux", "lhzx", "lwa", "lwarx", "lwaux",
113 "lwax", "lwbrx", "lwz", "lwzcix", "lwzu", "lwzux", "lwzx", "mcrf", "mcrxr",
114 "mcrxrx", "mfcr/mfocrf", "mfmsr", "mfspr", "modsd", "modsw", "modud",
115 "moduw", "mtcrf/mtocrf", "mtmsr", "mtmsrd", "mtspr", "mulhd", "mulhdu",
116 "mulhw", "mulhwu", "mulld", "mulldo", "mulli", "mullw", "mullwo",
117 "nand", "neg", "nego", "nop", "nor", "or", "orc", "ori", "oris",
118 "popcntb", "popcntd", "popcntw", "prtyd", "prtyw", "rfid", "rldcl",
119 "rldcr", "rldic", "rldicl", "rldicr", "rldimi", "rlwimi", "rlwinm",
120 "rlwnm", "setb", "sim_cfg", "slbia", "sld", "slw", "srad", "sradi", "sraw",
121 "srawi", "srd", "srw", "stb", "stbcix", "stbcx", "stbu", "stbux", "stbx",
122 "std", "stdbrx", "stdcx", "stdu", "stdux", "stdx", "sth", "sthbrx", "sthcx",
123 "sthu", "sthux", "sthx", "stw", "stwbrx", "stwcx", "stwu", "stwux",
124 "stwx", "subf", "subfc", "subfco", "subfe", "subfeo", "subfic",
125 "subfme", "subfmeo", "subfo", "subfze", "subfzeo", "sync", "td",
126 "tdi", "tlbie", "tlbiel", "tw", "twi", "xor", "xori", "xoris",
129 # two-way lookup of instruction-to-index and vice-versa
132 for i
, insn
in enumerate(_insns
):
136 # Internal Operation numbering. Add new opcodes here (FPADD, FPMUL etc.)
139 OP_ILLEGAL
= 0 # important that this is zero (see power_decoder.py)
220 RS
= 4 # for some ALU/Logical operations
238 RS
= 13 # for shiftrot (M-Form)
245 RB
= 2 # for shiftrot (M-Form)
266 class LDSTMode(Enum
):
300 class CROutSel(Enum
):
308 # SPRs - Special-Purpose Registers. See V3.0B Figure 18 p971 and
309 # http://libre-riscv.org/openpower/isatables/sprs.csv
310 # http://bugs.libre-riscv.org/show_bug.cgi?id=261
312 spr_csv
= get_csv("sprs.csv")
313 spr_info
= namedtuple('spr_info', 'SPR priv_mtspr priv_mfspr length idx')
317 info
= spr_info(SPR
=row
['SPR'], priv_mtspr
=row
['priv_mtspr'],
318 priv_mfspr
=row
['priv_mfspr'], length
=int(row
['len']),
320 spr_dict
[int(row
['Idx'])] = info
321 spr_byname
[row
['SPR']] = info
322 fields
= [(row
['SPR'], int(row
['Idx'])) for row
in spr_csv
]
323 SPR
= Enum('SPR', fields
)
334 if __name__
== '__main__':
335 # find out what the heck is in SPR enum :)
336 print("sprs", len(SPR
))
339 print(SPR
.__members
__['TAR'])
341 print(x
, x
.value
, str(x
), x
.name
)
343 print ("function", Function
.ALU
.name
)