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