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.)
92 # supported instructions: make sure to keep up-to-date with CSV files
93 # just like everything else
95 "NONE", "add", "addc", "addco", "adde", "addeo", "addi", "addic", "addic.",
96 "addis", "addme", "addmeo", "addo", "addze", "addzeo", "and", "andc",
97 "andi.", "andis.", "attn", "b", "bc", "bcctr", "bclr", "bctar",
98 "bpermd", "cmp", "cmpb", "cmpeqb", "cmpi", "cmpl", "cmpli", "cmprb",
99 "cntlzd", "cntlzw", "cnttzd", "cnttzw", "crand", "crandc", "creqv",
100 "crnand", "crnor", "cror", "crorc", "crxor", "darn", "dcbf", "dcbst",
101 "dcbt", "dcbtst", "dcbz", "divd", "divde", "divdeo", "divdeu",
102 "divdeuo", "divdo", "divdu", "divduo", "divw", "divwe", "divweo",
103 "divweu", "divweuo", "divwo", "divwu", "divwuo", "eqv", "extsb",
104 "extsh", "extsw", "extswsli", "icbi", "icbt", "isel", "isync",
105 "lbarx", "lbz", "lbzu", "lbzux", "lbzx", "ld", "ldarx", "ldbrx",
106 "ldu", "ldux", "ldx", "lha", "lharx", "lhau", "lhaux", "lhax",
107 "lhbrx", "lhz", "lhzu", "lhzux", "lhzx", "lwa", "lwarx", "lwaux",
108 "lwax", "lwbrx", "lwz", "lwzu", "lwzux", "lwzx", "mcrf", "mcrxr",
109 "mcrxrx", "mfcr/mfocrf", "mfmsr", "mfspr", "modsd", "modsw", "modud",
110 "moduw", "mtcrf/mtocrf", "mtmsrd", "mtspr", "mulhd", "mulhdu",
111 "mulhw", "mulhwu", "mulld", "mulldo", "mulli", "mullw", "mullwo",
112 "nand", "neg", "nego", "nop", "nor", "or", "orc", "ori", "oris",
113 "popcntb", "popcntd", "popcntw", "prtyd", "prtyw", "rfid", "rldcl",
114 "rldcr", "rldic", "rldicl", "rldicr", "rldimi", "rlwimi", "rlwinm",
115 "rlwnm", "setb", "sim_cfg", "sld", "slw", "srad", "sradi", "sraw",
116 "srawi", "srd", "srw", "stb", "stbcx", "stbu", "stbux", "stbx", "std",
117 "stdbrx", "stdcx", "stdu", "stdux", "stdx", "sth", "sthbrx", "sthcx",
118 "sthu", "sthux", "sthx", "stw", "stwbrx", "stwcx", "stwu", "stwux",
119 "stwx", "subf", "subfc", "subfco", "subfe", "subfeo", "subfic",
120 "subfme", "subfmeo", "subfo", "subfze", "subfzeo", "sync", "td",
121 "tdi", "tw", "twi", "xor", "xori", "xoris",
124 # two-way lookup of instruction-to-index and vice-versa
127 for i
, insn
in enumerate(_insns
):
131 # Internal Operation numbering. Add new opcodes here (FPADD, FPMUL etc.)
133 class InternalOp(Enum
):
134 OP_ILLEGAL
= 0 # important that this is zero (see power_decoder.py)
213 RS
= 4 # for some ALU/Logical operations
231 RS
= 13 # for shiftrot (M-Form)
238 RB
= 2 # for shiftrot (M-Form)
282 class CROutSel(Enum
):
290 # SPRs - Special-Purpose Registers. See V3.0B Figure 18 p971 and
291 # http://libre-riscv.org/openpower/isatables/sprs.csv
292 # http://bugs.libre-riscv.org/show_bug.cgi?id=261
294 spr_csv
= get_csv("sprs.csv")
295 spr_info
= namedtuple('spr_info', 'SPR priv_mtspr priv_mfspr length')
299 info
= spr_info(SPR
=row
['SPR'], priv_mtspr
=row
['priv_mtspr'],
300 priv_mfspr
=row
['priv_mfspr'], length
=int(row
['len']))
301 spr_dict
[int(row
['Idx'])] = info
302 spr_byname
[row
['SPR']] = info
303 fields
= [(row
['SPR'], int(row
['Idx'])) for row
in spr_csv
]
304 SPR
= Enum('SPR', fields
)
315 if __name__
== '__main__':
316 # find out what the heck is in SPR enum :)
317 print ("sprs", len(SPR
))
320 print (SPR
.__members
__['TAR'])
322 print (x
, x
.value
, str(x
), x
.name
)