1 # SPDX-License-Identifier: LGPLv3+
2 # Copyright (C) 2021 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
3 # Funded by NLnet http://nlnet.nl
5 """SVP64 OpenPOWER v3.0B assembly translator
7 This class takes raw svp64 assembly mnemonics (aliases excluded) and creates
8 an EXT001-encoded "svp64 prefix" (as a .long) followed by a v3.0B opcode.
10 It is very simple and straightforward, the only weirdness being the
11 extraction of the register information and conversion to v3.0B numbering.
13 Encoding format of svp64: https://libre-soc.org/openpower/sv/svp64/
14 Encoding format of arithmetic: https://libre-soc.org/openpower/sv/normal/
15 Encoding format of LDST: https://libre-soc.org/openpower/sv/ldst/
16 **TODO format of branches: https://libre-soc.org/openpower/sv/branches/**
17 **TODO format of CRs: https://libre-soc.org/openpower/sv/cr_ops/**
18 Bugtracker: https://bugs.libre-soc.org/show_bug.cgi?id=578
23 from collections
import OrderedDict
25 from openpower
.decoder
.isa
.caller
import (SVP64PrefixFields
, SV64P_MAJOR_SIZE
,
26 SV64P_PID_SIZE
, SVP64RMFields
,
27 SVP64RM_EXTRA2_SPEC_SIZE
,
28 SVP64RM_EXTRA3_SPEC_SIZE
,
29 SVP64RM_MODE_SIZE
, SVP64RM_SMASK_SIZE
,
30 SVP64RM_MMODE_SIZE
, SVP64RM_MASK_SIZE
,
31 SVP64RM_SUBVL_SIZE
, SVP64RM_EWSRC_SIZE
,
33 from openpower
.decoder
.pseudo
.pagereader
import ISA
34 from openpower
.decoder
.power_svp64
import SVP64RM
, get_regtype
, decode_extra
35 from openpower
.decoder
.selectable_int
import SelectableInt
36 from openpower
.consts
import SVP64MODE
39 from openpower
.util
import log
42 # decode GPR into sv extra
43 def get_extra_gpr(etype
, regmode
, field
):
44 if regmode
== 'scalar':
45 # cut into 2-bits 5-bits SS FFFFF
47 field
= field
& 0b11111
49 # cut into 5-bits 2-bits FFFFF SS
50 sv_extra
= field
& 0b11
52 return sv_extra
, field
55 # decode 3-bit CR into sv extra
56 def get_extra_cr_3bit(etype
, regmode
, field
):
57 if regmode
== 'scalar':
58 # cut into 2-bits 3-bits SS FFF
62 # cut into 3-bits 4-bits FFF SSSS but will cut 2 zeros off later
63 sv_extra
= field
& 0b1111
65 return sv_extra
, field
69 def decode_subvl(encoding
):
70 pmap
= {'2': 0b01, '3': 0b10, '4': 0b11}
71 assert encoding
in pmap
, \
72 "encoding %s for SUBVL not recognised" % encoding
77 def decode_elwidth(encoding
):
78 pmap
= {'8': 0b11, '16': 0b10, '32': 0b01}
79 assert encoding
in pmap
, \
80 "encoding %s for elwidth not recognised" % encoding
84 # decodes predicate register encoding
85 def decode_predicate(encoding
):
96 'nl': (1, 0b001), 'ge': (1, 0b001), # same value
98 'ng': (1, 0b011), 'le': (1, 0b011), # same value
101 'so': (1, 0b110), 'un': (1, 0b110), # same value
102 'ns': (1, 0b111), 'nu': (1, 0b111), # same value
104 assert encoding
in pmap
, \
105 "encoding %s for predicate not recognised" % encoding
106 return pmap
[encoding
]
109 # decodes "Mode" in similar way to BO field (supposed to, anyway)
110 def decode_bo(encoding
):
111 pmap
= { # TODO: double-check that these are the same as Branch BO
113 'nl': 0b001, 'ge': 0b001, # same value
115 'ng': 0b011, 'le': 0b011, # same value
118 'so': 0b110, 'un': 0b110, # same value
119 'ns': 0b111, 'nu': 0b111, # same value
121 assert encoding
in pmap
, \
122 "encoding %s for BO Mode not recognised" % encoding
123 return pmap
[encoding
]
125 # partial-decode fail-first mode
128 def decode_ffirst(encoding
):
129 if encoding
in ['RC1', '~RC1']:
131 return decode_bo(encoding
)
134 def decode_reg(field
):
135 # decode the field number. "5.v" or "3.s" or "9"
136 field
= field
.split(".")
137 regmode
= 'scalar' # default
141 elif field
[1] == 'v':
143 field
= int(field
[0]) # actual register number
144 return field
, regmode
147 def decode_imm(field
):
148 ldst_imm
= "(" in field
and field
[-1] == ')'
150 return field
[:-1].split("(")
155 def crf_extra(etype
, regmode
, field
, extras
):
156 """takes a CR Field number (CR0-CR127), splits into EXTRA2/3 and v3.0
157 the scalar/vector mode (crNN.v or crNN.s) changes both the format
158 of the EXTRA2/3 encoding as well as what range of registers is possible.
159 this function can be used for both BF/BFA and BA/BB/BT by first removing
160 the bottom 2 bits of BA/BB/BT then re-instating them after encoding.
161 see https://libre-soc.org/openpower/sv/svp64/appendix/#cr_extra
164 sv_extra
, field
= get_extra_cr_3bit(etype
, regmode
, field
)
165 # now sanity-check (and shrink afterwards)
166 if etype
== 'EXTRA2':
167 # 3-bit CR Field (BF, BFA) EXTRA2 encoding
168 if regmode
== 'scalar':
169 # range is CR0-CR15 in increments of 1
170 assert (sv_extra
>> 1) == 0, \
171 "scalar CR %s cannot fit into EXTRA2 %s" % \
172 (rname
, str(extras
[extra_idx
]))
173 # all good: encode as scalar
174 sv_extra
= sv_extra
& 0b01
176 # range is CR0-CR127 in increments of 16
177 assert sv_extra
& 0b111 == 0, \
178 "vector CR %s cannot fit into EXTRA2 %s" % \
179 (rname
, str(extras
[extra_idx
]))
180 # all good: encode as vector (bit 2 set)
181 sv_extra
= 0b10 |
(sv_extra
>> 3)
183 # 3-bit CR Field (BF, BFA) EXTRA3 encoding
184 if regmode
== 'scalar':
185 # range is CR0-CR31 in increments of 1
186 assert (sv_extra
>> 2) == 0, \
187 "scalar CR %s cannot fit into EXTRA3 %s" % \
188 (rname
, str(extras
[extra_idx
]))
189 # all good: encode as scalar
190 sv_extra
= sv_extra
& 0b11
192 # range is CR0-CR127 in increments of 8
193 assert sv_extra
& 0b11 == 0, \
194 "vector CR %s cannot fit into EXTRA3 %s" % \
195 (rname
, str(extras
[extra_idx
]))
196 # all good: encode as vector (bit 3 set)
197 sv_extra
= 0b100 |
(sv_extra
>> 2)
198 return sv_extra
, field
201 # decodes svp64 assembly listings and creates EXT001 svp64 prefixes
203 def __init__(self
, lst
, bigendian
=False, macros
=None):
208 self
.trans
= self
.translate(lst
)
209 self
.isa
= ISA() # reads the v3.0B pseudo-code markdown files
210 self
.svp64
= SVP64RM() # reads the svp64 Remap entries for registers
211 assert bigendian
== False, "error, bigendian not supported yet"
214 yield from self
.trans
216 def translate_one(self
, insn
, macros
=None):
219 macros
.update(self
.macros
)
222 # find first space, to get opcode
225 # now find opcode fields
226 fields
= ''.join(ls
[1:]).split(',')
227 mfields
= list(map(str.strip
, fields
))
228 log("opcode, fields", ls
, opcode
, mfields
)
231 for field
in mfields
:
232 fields
.append(macro_subst(macros
, field
))
233 log("opcode, fields substed", ls
, opcode
, fields
)
235 # this is a *32-bit-only* instruction. it controls SVSTATE.
236 # it is *not* a 64-bit-prefixed Vector instruction (no sv.setvl),
237 # it is a Vector *control* instruction.
238 # note: EXT022 is the "sandbox" major opcode so it's fine to add
240 # sigh have to do setvl here manually for now...
241 # note the subtract one from SVi.
242 if opcode
in ["setvl", "setvl."]:
243 # 1.6.28 SVL-FORM - from fields.txt
244 # |0 |6 |11 |16 |23 |24 |25 |26 |31 |
245 # | PO | RT | RA | SVi |ms |vs |vf | XO |Rc |
246 insn
= 22 << (31-5) # opcode 22, bits 0-5
247 fields
= list(map(int, fields
))
248 insn |
= fields
[0] << (31-10) # RT , bits 6-10
249 insn |
= fields
[1] << (31-15) # RA , bits 11-15
250 insn |
= (fields
[2]-1) << (31-22) # SVi , bits 16-22
251 insn |
= fields
[3] << (31-25) # vf , bit 25
252 insn |
= fields
[4] << (31-24) # vs , bit 24
253 insn |
= fields
[5] << (31-23) # ms , bit 23
254 insn |
= 0b11011 << (31-30) # XO , bits 26..30
255 if opcode
== 'setvl.':
256 insn |
= 1 << (31-31) # Rc=1 , bit 31
257 log("setvl", bin(insn
))
258 yield ".long 0x%x" % insn
261 # this is a 32-bit instruction. it updates SVSTATE.
262 # it *can* be SVP64-prefixed, to indicate that its registers
264 # note: EXT022 is the "sandbox" major opcode so it's fine to add
266 # sigh have to do setvl here manually for now...
267 # note the subtract one from SVi.
268 if opcode
in ["svstep", "svstep."]:
269 # 1.6.28 SVL-FORM - from fields.txt
270 # |0 |6 |11 |16 |23 |24 |25 |26 |31 |
271 # | PO | RT | RA | SVi |ms |vs |vf | XO |Rc |
272 insn
= 22 << (31-5) # opcode 22, bits 0-5
273 fields
= list(map(int, fields
))
274 insn |
= fields
[0] << (31-10) # RT , bits 6-10
275 insn |
= (fields
[1]-1) << (31-22) # SVi , bits 16-22
276 insn |
= fields
[2] << (31-25) # vf , bit 25
277 insn |
= 0b10011 << (31-30) # XO , bits 26..30
278 if opcode
== 'svstep.':
279 insn |
= 1 << (31-31) # Rc=1 , bit 31
280 log("svstep", bin(insn
))
281 yield ".long 0x%x" % insn
284 # this is a *32-bit-only* instruction. it updates SVSHAPE and SVSTATE.
285 # it is *not* a 64-bit-prefixed Vector instruction (no sv.svshape),
286 # it is a Vector *control* instruction.
287 # note: EXT022 is the "sandbox" major opcode so it's fine to add
289 # and svshape. note that the dimension fields one subtracted from each
290 if opcode
== 'svshape':
291 # 1.6.33 SVM-FORM from fields.txt
292 # |0 |6 |11 |16 |21 |25 |26 |31 |
293 # |PO | SVxd | SVyd | SVzd | SVRM |vf | XO | / |
294 insn
= 22 << (31-5) # opcode 22, bits 0-5
295 fields
= list(map(int, fields
))
296 insn |
= (fields
[0]-1) << (31-10) # SVxd , bits 6-10
297 insn |
= (fields
[1]-1) << (31-15) # SVyd , bits 11-15
298 insn |
= (fields
[2]-1) << (31-20) # SVzd , bits 16-20
299 insn |
= (fields
[3]) << (31-24) # SVRM , bits 21-24
300 insn |
= (fields
[4]) << (31-25) # vf , bits 25
301 insn |
= 0b011001 << (31-31) # XO , bits 26..31
303 log("svshape", bin(insn
))
304 yield ".long 0x%x" % insn
307 # this is a *32-bit-only* instruction. is a convenience instruction
308 # that reduces instruction count for Indexed REMAP Mode.
309 # it is *not* a 64-bit-prefixed Vector instruction (no sv.svindex),
310 # it is a Vector *control* instruction.
311 # note: EXT022 is the "sandbox" major opcode so it's fine to add
312 # note that the dimension field one subtracted
313 if opcode
== "svindex":
315 # |0 |6 |11 |16 |21 |23|24|25|26 31|
316 # | PO | RS |rmm | SVd |ew |yx|mm|sk| XO |
317 fields
= list(map(int, fields
))
318 insn
= 22 << (31-5) # opcode 22, bits 0-5
319 insn |
= fields
[0] << (31-10) # RS , bits 6-10
320 insn |
= fields
[1] << (31-15) # rmm , bits 11-15
321 insn |
= (fields
[2]-1) << (31-20) # SVd , bits 16-20
322 insn |
= fields
[3] << (31-22) # ew , bits 21-22
323 insn |
= fields
[4] << (31-23) # yx , bit 23
324 insn |
= fields
[5] << (31-24) # mm , bit 24
325 insn |
= fields
[6] << (31-25) # sk , bit 25
326 log("svindex", bin(insn
))
327 yield ".long 0x%x" % insn
330 # this is a *32-bit-only* instruction. it updates the SVSHAPE SPR
331 # it is *not* a 64-bit-prefixed Vector instruction (no sv.svremap),
332 # it is a Vector *control* instruction.
333 # note: EXT022 is the "sandbox" major opcode so it's fine to add
336 if opcode
== 'svremap':
337 # 1.6.34 SVRM-FORM from fields.txt
338 # |0 |6 |11 |13 |15 |17 |19 |21 |22 |26 |31 |
339 # |PO | SVme |mi0 | mi1 | mi2 | mo0 | mo1 |pst |/// | XO | / |
340 insn
= 22 << (31-5) # opcode 22, bits 0-5
341 fields
= list(map(int, fields
))
342 insn |
= fields
[0] << (31-10) # SVme , bits 6-10
343 insn |
= fields
[1] << (31-12) # mi0 , bits 11-12
344 insn |
= fields
[2] << (31-14) # mi1 , bits 13-14
345 insn |
= fields
[3] << (31-16) # mi2 , bits 15-16
346 insn |
= fields
[4] << (31-18) # m00 , bits 17-18
347 insn |
= fields
[5] << (31-20) # m01 , bits 19-20
348 insn |
= fields
[6] << (31-21) # pst , bit 21
349 insn |
= 0b111001 << (31-31) # XO , bits 26..31
350 log("svremap", bin(insn
))
351 yield ".long 0x%x" % insn
354 # ok from here-on down these are added as 32-bit instructions
355 # and are here only because binutils (at present) doesn't have
356 # them (that's being fixed!)
357 # they can - if implementations then choose - be Vectorised
358 # (sv.fsins) because they are general-purpose scalar instructions
361 # |0 |6 |11 |16 |21 |26 |27 31|
362 # | PO | RT | RA | RB |bm |L | XO |
363 if opcode
== ('bmask'):
364 fields
= list(map(int, fields
))
365 insn
= 22 << (31-5) # opcode 22, bits 0-5
366 insn |
= fields
[0] << (31-10) # RT , bits 6-10
367 insn |
= fields
[1] << (31-15) # RA , bits 11-15
368 insn |
= fields
[2] << (31-20) # RB , bits 16-20
369 insn |
= fields
[3] << (31-25) # mask , bits 21-25
370 insn |
= fields
[4] << (31-26) # L , bit 26
371 insn |
= 0b010001 << (31-31) # XO , bits 26..31
372 log("bmask", bin(insn
))
373 yield ".long 0x%x" % insn
378 # XXX WARNING THESE ARE NOT APPROVED BY OPF ISA WG
379 # however we are out of space with opcode 22
380 if opcode
.startswith('fsins'):
381 fields
= list(map(int, fields
))
382 insn
= 59 << (31-5) # opcode 59, bits 0-5
383 insn |
= fields
[0] << (31-10) # RT , bits 6-10
384 insn |
= fields
[1] << (31-20) # RB , bits 16-20
385 insn |
= 0b1000001110 << (31-30) # XO , bits 21..30
386 if opcode
== 'fsins.':
387 insn |
= 1 << (31-31) # Rc=1 , bit 31
388 log("fsins", bin(insn
))
389 yield ".long 0x%x" % insn
393 # XXX WARNING THESE ARE NOT APPROVED BY OPF ISA WG
394 # however we are out of space with opcode 22
395 if opcode
.startswith('fcoss'):
396 fields
= list(map(int, fields
))
397 insn
= 59 << (31-5) # opcode 59, bits 0-5
398 insn |
= fields
[0] << (31-10) # RT , bits 6-10
399 insn |
= fields
[1] << (31-20) # RB , bits 16-20
400 insn |
= 0b1000101110 << (31-30) # XO , bits 21..30
401 if opcode
== 'fcoss.':
402 insn |
= 1 << (31-31) # Rc=1 , bit 31
403 log("fcoss", bin(insn
))
404 yield ".long 0x%x" % insn
407 # XXX WARNING THESE ARE NOT APPROVED BY OPF ISA WG
408 # however we are out of space with opcode 22
409 if opcode
in ('ternlogi', 'ternlogi.'):
418 instr
= (instr
<< 5) | rt
419 instr
= (instr
<< 5) | ra
420 instr
= (instr
<< 5) | rb
421 instr
= (instr
<< 8) | imm
422 instr
= (instr
<< 2) | xo
423 instr
= (instr
<< 1) | rc
424 asm
= f
"{opcode} {rt}, {ra}, {rb}, {imm}"
425 yield f
".4byte {hex(instr)} # {asm}"
428 # XXX WARNING THESE ARE NOT APPROVED BY OPF ISA WG
429 # however we are out of space with opcode 22
430 if opcode
in ('grev', 'grevi', 'grevw', 'grevwi',
431 'grev.', 'grevi.', 'grevw.', 'grevwi.'):
433 # _ matches fields in table at:
434 # https://libre-soc.org/openpower/sv/bitmanip/
440 Rc
= 1 if '.' in opcode
else 0
443 rb_imm
= int(fields
[2])
445 instr
= (instr
<< 5) | rt
446 instr
= (instr
<< 5) | ra
447 if opcode
== 'grevi' or opcode
== 'grevi.':
448 assert 0 <= rb_imm
< 64
449 instr
= (instr
<< 6) | rb_imm
450 instr
= (instr
<< 9) | xo
452 assert 0 <= rb_imm
< 32
453 instr
= (instr
<< 5) | rb_imm
454 instr
= (instr
<< 10) | xo
455 instr
= (instr
<< 1) | Rc
456 asm
= f
"{opcode} {rt}, {ra}, {rb_imm}"
457 yield f
".4byte {hex(instr)} # {asm}"
461 # XXX WARNING THESE ARE NOT APPROVED BY OPF ISA WG
463 # |0 |6 |7|8|9 |10 |11|12|13 |15|16|17 |20|21 |31 |
464 # | PO | RT | RA | RB | XO |Rc |
465 if opcode
in ['mins', 'maxs', 'minu', 'maxu',
466 'mins.', 'maxs.', 'minu.', 'maxu.']:
467 if opcode
[:4] == 'maxs':
469 if opcode
[:4] == 'maxu':
471 if opcode
[:4] == 'mins':
473 if opcode
[:4] == 'minu':
475 fields
= list(map(int, fields
))
476 insn
= 22 << (31-5) # opcode 22, bits 0-5
477 insn |
= fields
[0] << (31-10) # RT , bits 6-10
478 insn |
= fields
[1] << (31-15) # RA , bits 11-15
479 insn |
= fields
[2] << (31-20) # RB , bits 16-20
480 insn |
= XO
<< (31-30) # XO , bits 21..30
481 if opcode
.endswith('.'):
482 insn |
= 1 << (31-31) # Rc=1 , bit 31
483 log("maxs", bin(insn
))
484 yield ".long 0x%x" % insn
487 # and avgadd, absdu, absdacu, absdacs
488 # XXX WARNING THESE ARE NOT APPROVED BY OPF ISA WG
490 # |0 |6 |7|8|9 |10 |11|12|13 |15|16|17 |20|21 |31 |
491 # | PO | RT | RA | RB | XO |Rc |
492 if opcode
in ['avgadd', 'absdu', 'absds', 'absdacu', 'absdacs',
494 if opcode
[:5] == 'absdu':
496 elif opcode
[:5] == 'absds':
498 elif opcode
[:6] == 'avgadd':
500 elif opcode
[:7] == 'absdacu':
502 elif opcode
[:7] == 'absdacs':
504 elif opcode
[:7] == 'cprop':
506 fields
= list(map(int, fields
))
507 insn
= 22 << (31-5) # opcode 22, bits 0-5
508 insn |
= fields
[0] << (31-10) # RT , bits 6-10
509 insn |
= fields
[1] << (31-15) # RA , bits 11-15
510 insn |
= fields
[2] << (31-20) # RB , bits 16-20
511 insn |
= XO
<< (31-30) # XO , bits 21..30
512 if opcode
.endswith('.'):
513 insn |
= 1 << (31-31) # Rc=1 , bit 31
514 log(opcode
, bin(insn
))
515 yield ".long 0x%x" % insn
518 # identify if is a svp64 mnemonic
519 if not opcode
.startswith('sv.'):
520 yield insn
# unaltered
522 opcode
= opcode
[3:] # strip leading "sv"
524 # start working on decoding the svp64 op: sv.basev30Bop/vec2/mode
525 opmodes
= opcode
.split("/") # split at "/"
526 v30b_op
= opmodes
.pop(0) # first is the v3.0B
527 # check instruction ends with dot
528 rc_mode
= v30b_op
.endswith('.')
530 v30b_op
= v30b_op
[:-1]
532 # sigh again, have to recognised LD/ST bit-reverse instructions
533 # this has to be "processed" to fit into a v3.0B without the "sh"
534 # e.g. ldsh is actually ld
535 ldst_shift
= v30b_op
.startswith("l") and v30b_op
.endswith("sh")
537 if v30b_op
not in isa
.instr
:
538 raise Exception("opcode %s of '%s' not supported" %
542 # okaay we need to process the fields and make this:
543 # ldsh RT, SVD(RA), RC - 11 bits for SVD, 5 for RC
545 # ld RT, D(RA) - 16 bits
546 # likewise same for SVDS (9 bits for SVDS, 5 for RC, 14 bits for DS)
547 form
= isa
.instr
[v30b_op
].form
# get form (SVD-Form, SVDS-Form)
551 # identify if this is a ld/st immediate(reg) thing
552 ldst_imm
= "(" in field
and field
[-1] == ')'
554 newfields
.append(field
[:-1].split("("))
556 newfields
.append(field
)
558 immed
, RA
= newfields
[1]
560 RC
= int(newfields
.pop(2)) # better be an integer number!
561 if form
== 'SVD': # 16 bit: immed 11 bits, RC shift up 11
562 immed
= (immed
& 0b11111111111) |
(RC
<< 11)
563 if immed
& (1 << 15): # should be negative
565 if form
== 'SVDS': # 14 bit: immed 9 bits, RC shift up 9
566 immed
= (immed
& 0b111111111) |
(RC
<< 9)
567 if immed
& (1 << 13): # should be negative
569 newfields
[1] = "%d(%s)" % (immed
, RA
)
572 # and strip off "sh" from end, and add "sh" to opmodes, instead
573 v30b_op
= v30b_op
[:-2]
575 log("rewritten", v30b_op
, opmodes
, fields
)
577 if v30b_op
not in svp64
.instrs
:
578 raise Exception("opcode %s of '%s' not an svp64 instruction" %
580 v30b_regs
= isa
.instr
[v30b_op
].regs
[0] # get regs info "RT, RA, RB"
581 rm
= svp64
.instrs
[v30b_op
] # one row of the svp64 RM CSV
582 log("v3.0B op", v30b_op
, "Rc=1" if rc_mode
else '')
583 log("v3.0B regs", opcode
, v30b_regs
)
586 # right. the first thing to do is identify the ordering of
587 # the registers, by name. the EXTRA2/3 ordering is in
588 # rm['0']..rm['3'] but those fields contain the names RA, BB
589 # etc. we have to read the pseudocode to understand which
590 # reg is which in our instruction. sigh.
592 # first turn the svp64 rm into a "by name" dict, recording
593 # which position in the RM EXTRA it goes into
594 # also: record if the src or dest was a CR, for sanity-checking
595 # (elwidth overrides on CRs are banned)
596 decode
= decode_extra(rm
)
597 dest_reg_cr
, src_reg_cr
, svp64_src
, svp64_dest
= decode
599 log("EXTRA field index, src", svp64_src
)
600 log("EXTRA field index, dest", svp64_dest
)
602 # okaaay now we identify the field value (opcode N,N,N) with
603 # the pseudo-code info (opcode RT, RA, RB)
604 assert len(fields
) == len(v30b_regs
), \
605 "length of fields %s must match insn `%s` fields %s" % \
606 (str(v30b_regs
), insn
, str(fields
))
607 opregfields
= zip(fields
, v30b_regs
) # err that was easy
609 # now for each of those find its place in the EXTRA encoding
610 # note there is the possibility (for LD/ST-with-update) of
611 # RA occurring **TWICE**. to avoid it getting added to the
612 # v3.0B suffix twice, we spot it as a duplicate, here
613 extras
= OrderedDict()
614 for idx
, (field
, regname
) in enumerate(opregfields
):
615 imm
, regname
= decode_imm(regname
)
616 rtype
= get_regtype(regname
)
617 log(" idx find", rtype
, idx
, field
, regname
, imm
)
619 # probably an immediate field, append it straight
620 extras
[('imm', idx
, False)] = (idx
, field
, None, None, None)
622 extra
= svp64_src
.get(regname
, None)
623 if extra
is not None:
624 extra
= ('s', extra
, False) # not a duplicate
625 extras
[extra
] = (idx
, field
, regname
, rtype
, imm
)
626 log(" idx src", idx
, extra
, extras
[extra
])
627 dextra
= svp64_dest
.get(regname
, None)
628 log("regname in", regname
, dextra
)
629 if dextra
is not None:
630 is_a_duplicate
= extra
is not None # duplicate spotted
631 dextra
= ('d', dextra
, is_a_duplicate
)
632 extras
[dextra
] = (idx
, field
, regname
, rtype
, imm
)
633 log(" idx dst", idx
, extra
, extras
[dextra
])
635 # great! got the extra fields in their associated positions:
636 # also we know the register type. now to create the EXTRA encodings
637 etype
= rm
['Etype'] # Extra type: EXTRA3/EXTRA2
638 ptype
= rm
['Ptype'] # Predication type: Twin / Single
641 for extra_idx
, (idx
, field
, rname
, rtype
, iname
) in extras
.items():
642 # is it a field we don't alter/examine? if so just put it
645 v30b_newfields
.append(field
)
648 # identify if this is a ld/st immediate(reg) thing
649 ldst_imm
= "(" in field
and field
[-1] == ')'
651 immed
, field
= field
[:-1].split("(")
653 field
, regmode
= decode_reg(field
)
654 log(" ", extra_idx
, rname
, rtype
,
655 regmode
, iname
, field
, end
=" ")
657 # see Mode field https://libre-soc.org/openpower/sv/svp64/
658 # XXX TODO: the following is a bit of a laborious repeated
659 # mess, which could (and should) easily be parameterised.
660 # XXX also TODO: the LD/ST modes which are different
661 # https://libre-soc.org/openpower/sv/ldst/
663 # rright. SVP64 register numbering is from 0 to 127
664 # for GPRs, FPRs *and* CR Fields, where for v3.0 the GPRs and RPFs
665 # are 0-31 and CR Fields are only 0-7. the SVP64 RM "Extra"
666 # area is used to extend the numbering from the 32-bit
667 # instruction, and also to record whether the register
668 # is scalar or vector. on a per-operand basis. this
669 # results in a slightly finnicky encoding: here we go...
671 # encode SV-GPR and SV-FPR field into extra, v3.0field
672 if rtype
in ['GPR', 'FPR']:
673 sv_extra
, field
= get_extra_gpr(etype
, regmode
, field
)
674 # now sanity-check. EXTRA3 is ok, EXTRA2 has limits
675 # (and shrink to a single bit if ok)
676 if etype
== 'EXTRA2':
677 if regmode
== 'scalar':
678 # range is r0-r63 in increments of 1
679 assert (sv_extra
>> 1) == 0, \
680 "scalar GPR %s cannot fit into EXTRA2 %s" % \
681 (rname
, str(extras
[extra_idx
]))
682 # all good: encode as scalar
683 sv_extra
= sv_extra
& 0b01
685 # range is r0-r127 in increments of 2 (r0 r2 ... r126)
686 assert sv_extra
& 0b01 == 0, \
687 "%s: vector field %s cannot fit " \
689 (insn
, rname
, str(extras
[extra_idx
]))
690 # all good: encode as vector (bit 2 set)
691 sv_extra
= 0b10 |
(sv_extra
>> 1)
692 elif regmode
== 'vector':
693 # EXTRA3 vector bit needs marking
696 # encode SV-CR 3-bit field into extra, v3.0field.
697 # 3-bit is for things like BF and BFA
698 elif rtype
== 'CR_3bit':
699 sv_extra
, field
= crf_extra(etype
, regmode
, field
, extras
)
701 # encode SV-CR 5-bit field into extra, v3.0field
702 # 5-bit is for things like BA BB BC BT etc.
703 # *sigh* this is the same as 3-bit except the 2 LSBs of the
704 # 5-bit field are passed through unaltered.
705 elif rtype
== 'CR_5bit':
706 cr_subfield
= field
& 0b11 # record bottom 2 bits for later
707 field
= field
>> 2 # strip bottom 2 bits
708 # use the exact same 3-bit function for the top 3 bits
709 sv_extra
, field
= crf_extra(etype
, regmode
, field
, extras
)
710 # reconstruct the actual 5-bit CR field (preserving the
711 # bottom 2 bits, unaltered)
712 field
= (field
<< 2) | cr_subfield
715 raise Exception("no type match: %s" % rtype
)
717 # capture the extra field info
718 log("=>", "%5s" % bin(sv_extra
), field
)
719 extras
[extra_idx
] = sv_extra
721 # append altered field value to v3.0b, differs for LDST
722 # note that duplicates are skipped e.g. EXTRA2 contains
723 # *BOTH* s:RA *AND* d:RA which happens on LD/ST-with-update
724 srcdest
, idx
, duplicate
= extra_idx
725 if duplicate
: # skip adding to v3.0b fields, already added
728 v30b_newfields
.append(("%s(%s)" % (immed
, str(field
))))
730 v30b_newfields
.append(str(field
))
732 log("new v3.0B fields", v30b_op
, v30b_newfields
)
733 log("extras", extras
)
735 # rright. now we have all the info. start creating SVP64 RM
736 svp64_rm
= SVP64RMFields()
738 # begin with EXTRA fields
739 for idx
, sv_extra
in extras
.items():
745 srcdest
, idx
, duplicate
= idx
746 if etype
== 'EXTRA2':
747 svp64_rm
.extra2
[idx
].eq(
748 SelectableInt(sv_extra
, SVP64RM_EXTRA2_SPEC_SIZE
))
750 svp64_rm
.extra3
[idx
].eq(
751 SelectableInt(sv_extra
, SVP64RM_EXTRA3_SPEC_SIZE
))
753 # identify if the op is a LD/ST. the "blegh" way. copied
754 # from power_enums. TODO, split the list _insns down.
756 "lbarx", "lbz", "lbzu", "lbzux", "lbzx", # load byte
757 "ld", "ldarx", "ldbrx", "ldu", "ldux", "ldx", # load double
758 "lfs", "lfsx", "lfsu", "lfsux", # FP load single
759 "lfd", "lfdx", "lfdu", "lfdux", "lfiwzx", "lfiwax", # FP load dbl
760 "lha", "lharx", "lhau", "lhaux", "lhax", # load half
761 "lhbrx", "lhz", "lhzu", "lhzux", "lhzx", # more load half
762 "lwa", "lwarx", "lwaux", "lwax", "lwbrx", # load word
763 "lwz", "lwzcix", "lwzu", "lwzux", "lwzx", # more load word
766 "stb", "stbcix", "stbcx", "stbu", "stbux", "stbx",
767 "std", "stdbrx", "stdcx", "stdu", "stdux", "stdx",
768 "stfs", "stfsx", "stfsu", "stfux", # FP store sgl
769 "stfd", "stfdx", "stfdu", "stfdux", "stfiwx", # FP store dbl
770 "sth", "sthbrx", "sthcx", "sthu", "sthux", "sthx",
771 "stw", "stwbrx", "stwcx", "stwu", "stwux", "stwx",
773 # use this to determine if the SVP64 RM format is different.
774 # see https://libre-soc.org/openpower/sv/ldst/
775 is_ldst
= is_ld
or is_st
777 # branch-conditional detection
785 destwid
= 0 # bits 4-5
786 srcwid
= 0 # bits 6-7
788 smask
= 0 # bits 16-18 but only for twin-predication
789 mode
= 0 # bits 19-23
791 mask_m_specified
= False
802 mapreduce_crm
= False
803 mapreduce_svm
= False
809 # branch-conditional bits
819 # ok let's start identifying opcode augmentation fields
820 for encmode
in opmodes
:
821 # predicate mask (src and dest)
822 if encmode
.startswith("m="):
824 pmmode
, pmask
= decode_predicate(encmode
[2:])
825 smmode
, smask
= pmmode
, pmask
827 mask_m_specified
= True
828 # predicate mask (dest)
829 elif encmode
.startswith("dm="):
831 pmmode
, pmask
= decode_predicate(encmode
[3:])
834 # predicate mask (src, twin-pred)
835 elif encmode
.startswith("sm="):
837 smmode
, smask
= decode_predicate(encmode
[3:])
841 elif encmode
.startswith("sh"):
844 elif encmode
.startswith("vec"):
845 subvl
= decode_subvl(encmode
[3:])
847 elif encmode
.startswith("ew="):
848 destwid
= decode_elwidth(encmode
[3:])
849 elif encmode
.startswith("sw="):
850 srcwid
= decode_elwidth(encmode
[3:])
851 # element-strided LD/ST
852 elif encmode
== 'els':
855 elif encmode
== 'sats':
856 assert sv_mode
is None
859 elif encmode
== 'satu':
860 assert sv_mode
is None
864 elif encmode
== 'sz':
866 elif encmode
== 'dz':
869 elif encmode
.startswith("ff="):
870 assert sv_mode
is None
872 failfirst
= decode_ffirst(encmode
[3:])
873 # predicate-result, interestingly same as fail-first
874 elif encmode
.startswith("pr="):
875 assert sv_mode
is None
877 predresult
= decode_ffirst(encmode
[3:])
878 # map-reduce mode, reverse-gear
879 elif encmode
== 'mrr':
880 assert sv_mode
is None
885 elif encmode
== 'mr':
886 assert sv_mode
is None
889 elif encmode
== 'crm': # CR on map-reduce
890 assert sv_mode
is None
893 elif encmode
== 'svm': # sub-vector mode
898 elif encmode
== 'st': # svstep mode
900 elif encmode
== 'sr': # svstep BRc mode
903 elif encmode
== 'vs': # VLSET mode
905 elif encmode
== 'vsi': # VLSET mode with VLI (VL inclusives)
908 elif encmode
== 'vsb': # VLSET mode with VSb
911 elif encmode
== 'vsbi': # VLSET mode with VLI and VSb
915 elif encmode
== 'snz': # sz (only) already set above
918 elif encmode
== 'lu': # LR update mode
921 raise AssertionError("unknown encmode %s" % encmode
)
923 raise AssertionError("unknown encmode %s" % encmode
)
926 # since m=xx takes precedence (overrides) sm=xx and dm=xx,
927 # treat them as mutually exclusive
929 assert not has_smask
,\
930 "cannot have both source-mask and predicate mask"
931 assert not has_pmask
,\
932 "cannot have both dest-mask and predicate mask"
933 # since the default is INT predication (ALWAYS), if you
934 # specify one CR mask, you must specify both, to avoid
935 # mixing INT and CR reg types
936 if has_pmask
and pmmode
== 1:
938 "need explicit source-mask in CR twin predication"
939 if has_smask
and smmode
== 1:
941 "need explicit dest-mask in CR twin predication"
942 # sanity-check that 2Pred mask is same mode
943 if has_pmask
and has_smask
:
944 assert smmode
== pmmode
, \
945 "predicate masks %s and %s must be same reg type" % \
948 # sanity-check that twin-predication mask only specified in 2P mode
950 assert not has_smask
, \
951 "source-mask can only be specified on Twin-predicate ops"
952 assert not has_pmask
, \
953 "dest-mask can only be specified on Twin-predicate ops"
955 # construct the mode field, doing sanity-checking along the way
957 assert sv_mode
== 0b00, "sub-vector mode in mapreduce only"
958 assert subvl
!= 0, "sub-vector mode not possible on SUBVL=1"
961 assert has_smask
or mask_m_specified
, \
962 "src zeroing requires a source predicate"
964 assert has_pmask
or mask_m_specified
, \
965 "dest zeroing requires a dest predicate"
967 # check LDST shifted, only available in "normal" mode
968 if is_ldst
and ldst_shift
:
969 assert sv_mode
is None, \
970 "LD shift cannot have modes (%s) applied" % sv_mode
972 # okaaay, so there are 4 different modes, here, which will be
973 # partly-merged-in: is_ldst is merged in with "normal", but
974 # is_bc is so different it's done separately. likewise is_cr
975 # (when it is done). here are the maps:
977 # for "normal" arithmetic: https://libre-soc.org/openpower/sv/normal/
979 | 0-1 | 2 | 3 4 | description |
980 | --- | --- |---------|-------------------------- |
981 | 00 | 0 | dz sz | normal mode |
982 | 00 | 1 | 0 RG | scalar reduce mode (mapreduce), SUBVL=1 |
983 | 00 | 1 | 1 / | parallel reduce mode (mapreduce), SUBVL=1 |
984 | 00 | 1 | SVM RG | subvector reduce mode, SUBVL>1 |
985 | 01 | inv | CR-bit | Rc=1: ffirst CR sel |
986 | 01 | inv | VLi RC1 | Rc=0: ffirst z/nonz |
987 | 10 | N | dz sz | sat mode: N=0/1 u/s |
988 | 11 | inv | CR-bit | Rc=1: pred-result CR sel |
989 | 11 | inv | dz RC1 | Rc=0: pred-result z/nonz |
992 # https://libre-soc.org/openpower/sv/ldst/
993 # for LD/ST-immediate:
995 | 0-1 | 2 | 3 4 | description |
996 | --- | --- |---------|--------------------------- |
997 | 00 | 0 | dz els | normal mode |
998 | 00 | 1 | dz shf | shift mode |
999 | 01 | inv | CR-bit | Rc=1: ffirst CR sel |
1000 | 01 | inv | els RC1 | Rc=0: ffirst z/nonz |
1001 | 10 | N | dz els | sat mode: N=0/1 u/s |
1002 | 11 | inv | CR-bit | Rc=1: pred-result CR sel |
1003 | 11 | inv | els RC1 | Rc=0: pred-result z/nonz |
1006 # for LD/ST-indexed (RA+RB):
1008 | 0-1 | 2 | 3 4 | description |
1009 | --- | --- |---------|-------------------------- |
1010 | 00 | SEA | dz sz | normal mode |
1011 | 01 | SEA | dz sz | Strided (scalar only source) |
1012 | 10 | N | dz sz | sat mode: N=0/1 u/s |
1013 | 11 | inv | CR-bit | Rc=1: pred-result CR sel |
1014 | 11 | inv | dz RC1 | Rc=0: pred-result z/nonz |
1017 # and leaving out branches and cr_ops for now because they're
1019 """ TODO branches and cr_ops
1022 # now create mode and (overridden) src/dst widths
1023 # XXX TODO: sanity-check bc modes
1025 sv_mode
= ((bc_svstep
<< SVP64MODE
.MOD2_MSB
) |
1026 (bc_vlset
<< SVP64MODE
.MOD2_LSB
) |
1027 (bc_snz
<< SVP64MODE
.BC_SNZ
))
1028 srcwid
= (bc_vsb
<< 1) | bc_lru
1029 destwid
= (bc_lru
<< 1) | bc_all
1033 ######################################
1036 mode |
= src_zero
<< SVP64MODE
.SZ
# predicate zeroing
1037 mode |
= dst_zero
<< SVP64MODE
.DZ
# predicate zeroing
1039 # TODO: for now, LD/ST-indexed is ignored.
1040 mode |
= ldst_elstride
<< SVP64MODE
.ELS_NORMAL
# el-strided
1043 mode |
= 1 << SVP64MODE
.LDST_SHIFT
1045 # TODO, reduce and subvector mode
1046 # 00 1 dz CRM reduce mode (mapreduce), SUBVL=1
1047 # 00 1 SVM CRM subvector reduce mode, SUBVL>1
1051 ######################################
1053 elif sv_mode
== 0b00:
1054 mode |
= (0b1 << SVP64MODE
.REDUCE
) # sets mapreduce
1055 assert dst_zero
== 0, "dest-zero not allowed in mapreduce mode"
1057 mode |
= (0b1 << SVP64MODE
.RG
) # sets Reverse-gear mode
1059 mode |
= (0b1 << SVP64MODE
.CRM
) # sets CRM mode
1060 assert rc_mode
, "CRM only allowed when Rc=1"
1061 # bit of weird encoding to jam zero-pred or SVM mode in.
1062 # SVM mode can be enabled only when SUBVL=2/3/4 (vec2/3/4)
1064 mode |
= dst_zero
<< SVP64MODE
.DZ
# predicate zeroing
1066 mode |
= (0b1 << SVP64MODE
.SVM
) # sets SVM mode
1068 ######################################
1070 elif sv_mode
== 0b01:
1071 assert src_zero
== 0, "dest-zero not allowed in failfirst mode"
1072 if failfirst
== 'RC1':
1073 mode |
= (0b1 << SVP64MODE
.RC1
) # sets RC1 mode
1074 mode |
= (dst_zero
<< SVP64MODE
.DZ
) # predicate dst-zeroing
1075 assert rc_mode
== False, "ffirst RC1 only ok when Rc=0"
1076 elif failfirst
== '~RC1':
1077 mode |
= (0b1 << SVP64MODE
.RC1
) # sets RC1 mode
1078 mode |
= (dst_zero
<< SVP64MODE
.DZ
) # predicate dst-zeroing
1079 mode |
= (0b1 << SVP64MODE
.INV
) # ... with inversion
1080 assert rc_mode
== False, "ffirst RC1 only ok when Rc=0"
1082 assert dst_zero
== 0, "dst-zero not allowed in ffirst BO"
1083 assert rc_mode
, "ffirst BO only possible when Rc=1"
1084 mode |
= (failfirst
<< SVP64MODE
.BO_LSB
) # set BO
1086 ######################################
1087 # "saturation" modes
1088 elif sv_mode
== 0b10:
1089 mode |
= src_zero
<< SVP64MODE
.SZ
# predicate zeroing
1090 mode |
= dst_zero
<< SVP64MODE
.DZ
# predicate zeroing
1091 mode |
= (saturation
<< SVP64MODE
.N
) # signed/us saturation
1093 ######################################
1094 # "predicate-result" modes. err... code-duplication from ffirst
1095 elif sv_mode
== 0b11:
1096 assert src_zero
== 0, "dest-zero not allowed in predresult mode"
1097 if predresult
== 'RC1':
1098 mode |
= (0b1 << SVP64MODE
.RC1
) # sets RC1 mode
1099 mode |
= (dst_zero
<< SVP64MODE
.DZ
) # predicate dst-zeroing
1100 assert rc_mode
== False, "pr-mode RC1 only ok when Rc=0"
1101 elif predresult
== '~RC1':
1102 mode |
= (0b1 << SVP64MODE
.RC1
) # sets RC1 mode
1103 mode |
= (dst_zero
<< SVP64MODE
.DZ
) # predicate dst-zeroing
1104 mode |
= (0b1 << SVP64MODE
.INV
) # ... with inversion
1105 assert rc_mode
== False, "pr-mode RC1 only ok when Rc=0"
1107 assert dst_zero
== 0, "dst-zero not allowed in pr-mode BO"
1108 assert rc_mode
, "pr-mode BO only possible when Rc=1"
1109 mode |
= (predresult
<< SVP64MODE
.BO_LSB
) # set BO
1111 # whewww.... modes all done :)
1112 # now put into svp64_rm
1115 svp64_rm
.mode
.eq(SelectableInt(mode
, SVP64RM_MODE_SIZE
))
1117 # put in predicate masks into svp64_rm
1119 # source pred: bits 16-18
1120 svp64_rm
.smask
.eq(SelectableInt(smask
, SVP64RM_SMASK_SIZE
))
1122 svp64_rm
.mmode
.eq(SelectableInt(mmode
, SVP64RM_MMODE_SIZE
))
1124 svp64_rm
.mask
.eq(SelectableInt(pmask
, SVP64RM_MASK_SIZE
))
1126 # and subvl: bits 8-9
1127 svp64_rm
.subvl
.eq(SelectableInt(subvl
, SVP64RM_SUBVL_SIZE
))
1131 svp64_rm
.ewsrc
.eq(SelectableInt(srcwid
, SVP64RM_EWSRC_SIZE
))
1133 svp64_rm
.elwidth
.eq(SelectableInt(destwid
, SVP64RM_ELWIDTH_SIZE
))
1135 # nice debug printout. (and now for something completely different)
1136 # https://youtu.be/u0WOIwlXE9g?t=146
1137 svp64_rm_value
= svp64_rm
.spr
.value
1138 log("svp64_rm", hex(svp64_rm_value
), bin(svp64_rm_value
))
1139 log(" mmode 0 :", bin(mmode
))
1140 log(" pmask 1-3 :", bin(pmask
))
1141 log(" dstwid 4-5 :", bin(destwid
))
1142 log(" srcwid 6-7 :", bin(srcwid
))
1143 log(" subvl 8-9 :", bin(subvl
))
1144 log(" mode 19-23:", bin(mode
))
1145 offs
= 2 if etype
== 'EXTRA2' else 3 # 2 or 3 bits
1146 for idx
, sv_extra
in extras
.items():
1151 srcdest
, idx
, duplicate
= idx
1152 start
= (10+idx
*offs
)
1153 end
= start
+ offs
-1
1154 log(" extra%d %2d-%2d:" % (idx
, start
, end
),
1157 log(" smask 16-17:", bin(smask
))
1160 # first, construct the prefix from its subfields
1161 svp64_prefix
= SVP64PrefixFields()
1162 svp64_prefix
.major
.eq(SelectableInt(0x1, SV64P_MAJOR_SIZE
))
1163 svp64_prefix
.pid
.eq(SelectableInt(0b11, SV64P_PID_SIZE
))
1164 svp64_prefix
.rm
.eq(svp64_rm
.spr
)
1166 # fiinally yield the svp64 prefix and the thingy. v3.0b opcode
1167 rc
= '.' if rc_mode
else ''
1168 yield ".long 0x%08x" % svp64_prefix
.insn
.value
1170 # argh, sv.fmadds etc. need to be done manually
1171 if v30b_op
== 'ffmadds':
1172 opcode
= 59 << (32-6) # bits 0..6 (MSB0)
1173 opcode |
= int(v30b_newfields
[0]) << (32-11) # FRT
1174 opcode |
= int(v30b_newfields
[1]) << (32-16) # FRA
1175 opcode |
= int(v30b_newfields
[2]) << (32-21) # FRB
1176 opcode |
= int(v30b_newfields
[3]) << (32-26) # FRC
1177 opcode |
= 0b00101 << (32-31) # bits 26-30
1179 opcode |
= 1 # Rc, bit 31.
1180 yield ".long 0x%x" % opcode
1181 # argh, sv.fdmadds need to be done manually
1182 elif v30b_op
== 'fdmadds':
1183 opcode
= 59 << (32-6) # bits 0..6 (MSB0)
1184 opcode |
= int(v30b_newfields
[0]) << (32-11) # FRT
1185 opcode |
= int(v30b_newfields
[1]) << (32-16) # FRA
1186 opcode |
= int(v30b_newfields
[2]) << (32-21) # FRB
1187 opcode |
= int(v30b_newfields
[3]) << (32-26) # FRC
1188 opcode |
= 0b01111 << (32-31) # bits 26-30
1190 opcode |
= 1 # Rc, bit 31.
1191 yield ".long 0x%x" % opcode
1192 # argh, sv.ffadds etc. need to be done manually
1193 elif v30b_op
== 'ffadds':
1194 opcode
= 59 << (32-6) # bits 0..6 (MSB0)
1195 opcode |
= int(v30b_newfields
[0]) << (32-11) # FRT
1196 opcode |
= int(v30b_newfields
[1]) << (32-16) # FRA
1197 opcode |
= int(v30b_newfields
[2]) << (32-21) # FRB
1198 opcode |
= 0b01101 << (32-31) # bits 26-30
1200 opcode |
= 1 # Rc, bit 31.
1201 yield ".long 0x%x" % opcode
1202 # sigh have to do svstep here manually for now...
1203 elif opcode
in ["svstep", "svstep."]:
1204 insn
= 22 << (31-5) # opcode 22, bits 0-5
1205 insn |
= int(v30b_newfields
[0]) << (31-10) # RT , bits 6-10
1206 insn |
= int(v30b_newfields
[1]) << (31-22) # SVi , bits 16-22
1207 insn |
= int(v30b_newfields
[2]) << (31-25) # vf , bit 25
1208 insn |
= 0b10011 << (31-30) # XO , bits 26..30
1209 if opcode
== 'svstep.':
1210 insn |
= 1 << (31-31) # Rc=1 , bit 31
1211 log("svstep", bin(insn
))
1212 yield ".long 0x%x" % insn
1213 # argh, sv.fcoss etc. need to be done manually
1214 elif v30b_op
in ["fcoss", "fcoss."]:
1215 insn
= 59 << (31-5) # opcode 59, bits 0-5
1216 insn |
= int(v30b_newfields
[0]) << (31-10) # RT , bits 6-10
1217 insn |
= int(v30b_newfields
[1]) << (31-20) # RB , bits 16-20
1218 insn |
= 0b1000101110 << (31-30) # XO , bits 21..30
1219 if opcode
== 'fcoss.':
1220 insn |
= 1 << (31-31) # Rc=1 , bit 31
1221 log("fcoss", bin(insn
))
1222 yield ".long 0x%x" % insn
1225 yield "%s %s" % (v30b_op
+rc
, ", ".join(v30b_newfields
))
1226 log("new v3.0B fields", v30b_op
, v30b_newfields
)
1228 def translate(self
, lst
):
1230 yield from self
.translate_one(insn
)
1233 def macro_subst(macros
, txt
):
1235 log("subst", txt
, macros
)
1238 for macro
, value
in macros
.items():
1241 replaced
= txt
.replace(macro
, value
)
1242 log("macro", txt
, "replaced", replaced
, macro
, value
)
1245 toreplace
= '%s.s' % macro
1246 if toreplace
== txt
:
1248 replaced
= txt
.replace(toreplace
, "%s.s" % value
)
1249 log("macro", txt
, "replaced", replaced
, toreplace
, value
)
1252 toreplace
= '%s.v' % macro
1253 if toreplace
== txt
:
1255 replaced
= txt
.replace(toreplace
, "%s.v" % value
)
1256 log("macro", txt
, "replaced", replaced
, toreplace
, value
)
1259 toreplace
= '(%s)' % macro
1260 if toreplace
in txt
:
1262 replaced
= txt
.replace(toreplace
, '(%s)' % value
)
1263 log("macro", txt
, "replaced", replaced
, toreplace
, value
)
1266 log(" processed", txt
)
1274 if not line
[0].isspace():
1282 # get an input file and an output file
1286 outfile
= sys
.stdout
1287 # read the whole lot in advance in case of in-place
1288 lines
= list(infile
.readlines())
1289 elif len(args
) != 2:
1290 print("pysvp64asm [infile | -] [outfile | -]", file=sys
.stderr
)
1296 infile
= open(args
[0], "r")
1297 # read the whole lot in advance in case of in-place overwrite
1298 lines
= list(infile
.readlines())
1301 outfile
= sys
.stdout
1303 outfile
= open(args
[1], "w")
1305 # read the line, look for "sv", process it
1306 macros
= {} # macros which start ".set"
1309 op
= line
.split("#")[0].strip()
1311 if op
.startswith(".set"):
1312 macro
= op
[4:].split(",")
1313 (macro
, value
) = map(str.strip
, macro
)
1314 macros
[macro
] = value
1315 if not (op
.startswith("sv.") or
1316 op
.startswith("setvl") or
1317 op
.startswith("svshape")):
1321 (ws
, line
) = get_ws(line
)
1322 lst
= isa
.translate_one(op
, macros
)
1323 lst
= '; '.join(lst
)
1324 outfile
.write("%s%s # %s\n" % (ws
, lst
, op
))
1327 if __name__
== '__main__':
1328 lst
= ['slw 3, 1, 4',
1331 'sv.cmpi 5, 1, 3, 2',
1333 'sv.isel 64.v, 3, 2, 65.v',
1334 'sv.setb/dm=r3/sm=1<<r3 5, 31',
1335 'sv.setb/m=r3 5, 31',
1336 'sv.setb/vec2 5, 31',
1337 'sv.setb/sw=8/ew=16 5, 31',
1338 'sv.extsw./ff=eq 5, 31',
1339 'sv.extsw./satu/sz/dz/sm=r3/dm=r3 5, 31',
1340 'sv.extsw./pr=eq 5.v, 31',
1341 'sv.add. 5.v, 2.v, 1.v',
1342 'sv.add./m=r3 5.v, 2.v, 1.v',
1345 'sv.stw 5.v, 4(1.v)',
1346 'sv.ld 5.v, 4(1.v)',
1347 'setvl. 2, 3, 4, 0, 1, 1',
1348 'sv.setvl. 2, 3, 4, 0, 1, 1',
1351 "sv.stfsu 0.v, 16(4.v)",
1354 "sv.stfsu/els 0.v, 16(4)",
1357 'sv.add./mr 5.v, 2.v, 1.v',
1359 macros
= {'win2': '50', 'win': '60'}
1361 'sv.addi win2.v, win.v, -1',
1362 'sv.add./mrr 5.v, 2.v, 1.v',
1363 #'sv.lhzsh 5.v, 11(9.v), 15',
1364 #'sv.lwzsh 5.v, 11(9.v), 15',
1365 'sv.ffmadds 6.v, 2.v, 4.v, 6.v',
1368 #'sv.fmadds 0.v, 8.v, 16.v, 4.v',
1369 #'sv.ffadds 0.v, 8.v, 4.v',
1370 'svremap 11, 0, 1, 2, 3, 2, 1',
1371 'svshape 8, 1, 1, 1, 0',
1372 'svshape 8, 1, 1, 1, 1',
1375 #'sv.lfssh 4.v, 11(8.v), 15',
1376 #'sv.lwzsh 4.v, 11(8.v), 15',
1377 #'sv.svstep. 2.v, 4, 0',
1378 #'sv.fcfids. 48.v, 64.v',
1379 'sv.fcoss. 80.v, 0.v',
1380 'sv.fcoss. 20.v, 0.v',
1383 'sv.bc/all 3,12,192',
1384 'sv.bclr/vsbi 3,81.v,192',
1385 'sv.ld 5.v, 4(1.v)',
1386 'sv.svstep. 2.v, 4, 0',
1397 'svindex 0,0,1,0,0,0,0',
1399 isa
= SVP64Asm(lst
, macros
=macros
)
1400 log("list", list(isa
))