summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/crypto/aesp10-ppc.pl
blob: 2c06ce2a2c7c02b159ac0108f8b380c3781f3403 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
#! /usr/bin/env perl
# SPDX-License-Identifier: GPL-2.0

# This code is taken from CRYPTOGAMs[1] and is included here using the option
# in the license to distribute the code under the GPL. Therefore this program
# is free software; you can redistribute it and/or modify it under the terms of
# the GNU General Public License version 2 as published by the Free Software
# Foundation.
#
# [1] https://www.openssl.org/~appro/cryptogams/

# Copyright (c) 2006-2017, CRYPTOGAMS by <appro@openssl.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
#       * Redistributions of source code must retain copyright notices,
#         this list of conditions and the following disclaimer.
#
#       * Redistributions in binary form must reproduce the above
#         copyright notice, this list of conditions and the following
#         disclaimer in the documentation and/or other materials
#         provided with the distribution.
#
#       * Neither the name of the CRYPTOGAMS nor the names of its
#         copyright holder and contributors may be used to endorse or
#         promote products derived from this software without specific
#         prior written permission.
#
# ALTERNATIVELY, provided that this notice is retained in full, this
# product may be distributed under the terms of the GNU General Public
# License (GPL), in which case the provisions of the GPL apply INSTEAD OF
# those given above.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# ====================================================================
# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
# project. The module is, however, dual licensed under OpenSSL and
# CRYPTOGAMS licenses depending on where you obtain it. For further
# details see https://www.openssl.org/~appro/cryptogams/.
# ====================================================================
#
# This module implements support for AES instructions as per PowerISA
# specification version 2.07, first implemented by POWER8 processor.
# The module is endian-agnostic in sense that it supports both big-
# and little-endian cases. Data alignment in parallelizable modes is
# handled with VSX loads and stores, which implies MSR.VSX flag being
# set. It should also be noted that ISA specification doesn't prohibit
# alignment exceptions for these instructions on page boundaries.
# Initially alignment was handled in pure AltiVec/VMX way [when data
# is aligned programmatically, which in turn guarantees exception-
# free execution], but it turned to hamper performance when vcipher
# instructions are interleaved. It's reckoned that eventual
# misalignment penalties at page boundaries are in average lower
# than additional overhead in pure AltiVec approach.
#
# May 2016
#
# Add XTS subroutine, 9x on little- and 12x improvement on big-endian
# systems were measured.
#
######################################################################
# Current large-block performance in cycles per byte processed with
# 128-bit key (less is better).
#
#		CBC en-/decrypt	CTR	XTS
# POWER8[le]	3.96/0.72	0.74	1.1
# POWER8[be]	3.75/0.65	0.66	1.0

$flavour = shift;

if ($flavour =~ /64/) {
	$SIZE_T	=8;
	$LRSAVE	=2*$SIZE_T;
	$STU	="stdu";
	$POP	="ld";
	$PUSH	="std";
	$UCMP	="cmpld";
	$SHL	="sldi";
} elsif ($flavour =~ /32/) {
	$SIZE_T	=4;
	$LRSAVE	=$SIZE_T;
	$STU	="stwu";
	$POP	="lwz";
	$PUSH	="stw";
	$UCMP	="cmplw";
	$SHL	="slwi";
} else { die "nonsense $flavour"; }

$LITTLE_ENDIAN = ($flavour=~/le$/) ? $SIZE_T : 0;

$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
( $xlate="${dir}ppc-xlate.pl" and -f $xlate ) or
( $xlate="${dir}../../perlasm/ppc-xlate.pl" and -f $xlate) or
die "can't locate ppc-xlate.pl";

open STDOUT,"| $^X $xlate $flavour ".shift || die "can't call $xlate: $!";

$FRAME=8*$SIZE_T;
$prefix="aes_p10";

$sp="r1";
$vrsave="r12";

#########################################################################
{{{	# Key setup procedures						#
my ($inp,$bits,$out,$ptr,$cnt,$rounds)=map("r$_",(3..8));
my ($zero,$in0,$in1,$key,$rcon,$mask,$tmp)=map("v$_",(0..6));
my ($stage,$outperm,$outmask,$outhead,$outtail)=map("v$_",(7..11));

$code.=<<___;
.machine	"any"

.text

.align	7
rcon:
.long	0x01000000, 0x01000000, 0x01000000, 0x01000000	?rev
.long	0x1b000000, 0x1b000000, 0x1b000000, 0x1b000000	?rev
.long	0x0d0e0f0c, 0x0d0e0f0c, 0x0d0e0f0c, 0x0d0e0f0c	?rev
.long	0,0,0,0						?asis
Lconsts:
	mflr	r0
	bcl	20,31,\$+4
	mflr	$ptr	 #vvvvv "distance between . and rcon
	addi	$ptr,$ptr,-0x48
	mtlr	r0
	blr
	.long	0
	.byte	0,12,0x14,0,0,0,0,0
.asciz	"AES for PowerISA 2.07, CRYPTOGAMS by <appro\@openssl.org>"

.globl	.${prefix}_set_encrypt_key
Lset_encrypt_key:
	mflr		r11
	$PUSH		r11,$LRSAVE($sp)

	li		$ptr,-1
	${UCMP}i	$inp,0
	beq-		Lenc_key_abort		# if ($inp==0) return -1;
	${UCMP}i	$out,0
	beq-		Lenc_key_abort		# if ($out==0) return -1;
	li		$ptr,-2
	cmpwi		$bits,128
	blt-		Lenc_key_abort
	cmpwi		$bits,256
	bgt-		Lenc_key_abort
	andi.		r0,$bits,0x3f
	bne-		Lenc_key_abort

	lis		r0,0xfff0
	mfspr		$vrsave,256
	mtspr		256,r0

	bl		Lconsts
	mtlr		r11

	neg		r9,$inp
	lvx		$in0,0,$inp
	addi		$inp,$inp,15		# 15 is not typo
	lvsr		$key,0,r9		# borrow $key
	li		r8,0x20
	cmpwi		$bits,192
	lvx		$in1,0,$inp
	le?vspltisb	$mask,0x0f		# borrow $mask
	lvx		$rcon,0,$ptr
	le?vxor		$key,$key,$mask		# adjust for byte swap
	lvx		$mask,r8,$ptr
	addi		$ptr,$ptr,0x10
	vperm		$in0,$in0,$in1,$key	# align [and byte swap in LE]
	li		$cnt,8
	vxor		$zero,$zero,$zero
	mtctr		$cnt

	?lvsr		$outperm,0,$out
	vspltisb	$outmask,-1
	lvx		$outhead,0,$out
	?vperm		$outmask,$zero,$outmask,$outperm

	blt		Loop128
	addi		$inp,$inp,8
	beq		L192
	addi		$inp,$inp,8
	b		L256

.align	4
Loop128:
	vperm		$key,$in0,$in0,$mask	# rotate-n-splat
	vsldoi		$tmp,$zero,$in0,12	# >>32
	 vperm		$outtail,$in0,$in0,$outperm	# rotate
	 vsel		$stage,$outhead,$outtail,$outmask
	 vmr		$outhead,$outtail
	vcipherlast	$key,$key,$rcon
	 stvx		$stage,0,$out
	 addi		$out,$out,16

	vxor		$in0,$in0,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	vxor		$in0,$in0,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	vxor		$in0,$in0,$tmp
	 vadduwm	$rcon,$rcon,$rcon
	vxor		$in0,$in0,$key
	bdnz		Loop128

	lvx		$rcon,0,$ptr		# last two round keys

	vperm		$key,$in0,$in0,$mask	# rotate-n-splat
	vsldoi		$tmp,$zero,$in0,12	# >>32
	 vperm		$outtail,$in0,$in0,$outperm	# rotate
	 vsel		$stage,$outhead,$outtail,$outmask
	 vmr		$outhead,$outtail
	vcipherlast	$key,$key,$rcon
	 stvx		$stage,0,$out
	 addi		$out,$out,16

	vxor		$in0,$in0,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	vxor		$in0,$in0,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	vxor		$in0,$in0,$tmp
	 vadduwm	$rcon,$rcon,$rcon
	vxor		$in0,$in0,$key

	vperm		$key,$in0,$in0,$mask	# rotate-n-splat
	vsldoi		$tmp,$zero,$in0,12	# >>32
	 vperm		$outtail,$in0,$in0,$outperm	# rotate
	 vsel		$stage,$outhead,$outtail,$outmask
	 vmr		$outhead,$outtail
	vcipherlast	$key,$key,$rcon
	 stvx		$stage,0,$out
	 addi		$out,$out,16

	vxor		$in0,$in0,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	vxor		$in0,$in0,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	vxor		$in0,$in0,$tmp
	vxor		$in0,$in0,$key
	 vperm		$outtail,$in0,$in0,$outperm	# rotate
	 vsel		$stage,$outhead,$outtail,$outmask
	 vmr		$outhead,$outtail
	 stvx		$stage,0,$out

	addi		$inp,$out,15		# 15 is not typo
	addi		$out,$out,0x50

	li		$rounds,10
	b		Ldone

.align	4
L192:
	lvx		$tmp,0,$inp
	li		$cnt,4
	 vperm		$outtail,$in0,$in0,$outperm	# rotate
	 vsel		$stage,$outhead,$outtail,$outmask
	 vmr		$outhead,$outtail
	 stvx		$stage,0,$out
	 addi		$out,$out,16
	vperm		$in1,$in1,$tmp,$key	# align [and byte swap in LE]
	vspltisb	$key,8			# borrow $key
	mtctr		$cnt
	vsububm		$mask,$mask,$key	# adjust the mask

Loop192:
	vperm		$key,$in1,$in1,$mask	# roate-n-splat
	vsldoi		$tmp,$zero,$in0,12	# >>32
	vcipherlast	$key,$key,$rcon

	vxor		$in0,$in0,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	vxor		$in0,$in0,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	vxor		$in0,$in0,$tmp

	 vsldoi		$stage,$zero,$in1,8
	vspltw		$tmp,$in0,3
	vxor		$tmp,$tmp,$in1
	vsldoi		$in1,$zero,$in1,12	# >>32
	 vadduwm	$rcon,$rcon,$rcon
	vxor		$in1,$in1,$tmp
	vxor		$in0,$in0,$key
	vxor		$in1,$in1,$key
	 vsldoi		$stage,$stage,$in0,8

	vperm		$key,$in1,$in1,$mask	# rotate-n-splat
	vsldoi		$tmp,$zero,$in0,12	# >>32
	 vperm		$outtail,$stage,$stage,$outperm	# rotate
	 vsel		$stage,$outhead,$outtail,$outmask
	 vmr		$outhead,$outtail
	vcipherlast	$key,$key,$rcon
	 stvx		$stage,0,$out
	 addi		$out,$out,16

	 vsldoi		$stage,$in0,$in1,8
	vxor		$in0,$in0,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	 vperm		$outtail,$stage,$stage,$outperm	# rotate
	 vsel		$stage,$outhead,$outtail,$outmask
	 vmr		$outhead,$outtail
	vxor		$in0,$in0,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	vxor		$in0,$in0,$tmp
	 stvx		$stage,0,$out
	 addi		$out,$out,16

	vspltw		$tmp,$in0,3
	vxor		$tmp,$tmp,$in1
	vsldoi		$in1,$zero,$in1,12	# >>32
	 vadduwm	$rcon,$rcon,$rcon
	vxor		$in1,$in1,$tmp
	vxor		$in0,$in0,$key
	vxor		$in1,$in1,$key
	 vperm		$outtail,$in0,$in0,$outperm	# rotate
	 vsel		$stage,$outhead,$outtail,$outmask
	 vmr		$outhead,$outtail
	 stvx		$stage,0,$out
	 addi		$inp,$out,15		# 15 is not typo
	 addi		$out,$out,16
	bdnz		Loop192

	li		$rounds,12
	addi		$out,$out,0x20
	b		Ldone

.align	4
L256:
	lvx		$tmp,0,$inp
	li		$cnt,7
	li		$rounds,14
	 vperm		$outtail,$in0,$in0,$outperm	# rotate
	 vsel		$stage,$outhead,$outtail,$outmask
	 vmr		$outhead,$outtail
	 stvx		$stage,0,$out
	 addi		$out,$out,16
	vperm		$in1,$in1,$tmp,$key	# align [and byte swap in LE]
	mtctr		$cnt

Loop256:
	vperm		$key,$in1,$in1,$mask	# rotate-n-splat
	vsldoi		$tmp,$zero,$in0,12	# >>32
	 vperm		$outtail,$in1,$in1,$outperm	# rotate
	 vsel		$stage,$outhead,$outtail,$outmask
	 vmr		$outhead,$outtail
	vcipherlast	$key,$key,$rcon
	 stvx		$stage,0,$out
	 addi		$out,$out,16

	vxor		$in0,$in0,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	vxor		$in0,$in0,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	vxor		$in0,$in0,$tmp
	 vadduwm	$rcon,$rcon,$rcon
	vxor		$in0,$in0,$key
	 vperm		$outtail,$in0,$in0,$outperm	# rotate
	 vsel		$stage,$outhead,$outtail,$outmask
	 vmr		$outhead,$outtail
	 stvx		$stage,0,$out
	 addi		$inp,$out,15		# 15 is not typo
	 addi		$out,$out,16
	bdz		Ldone

	vspltw		$key,$in0,3		# just splat
	vsldoi		$tmp,$zero,$in1,12	# >>32
	vsbox		$key,$key

	vxor		$in1,$in1,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	vxor		$in1,$in1,$tmp
	vsldoi		$tmp,$zero,$tmp,12	# >>32
	vxor		$in1,$in1,$tmp

	vxor		$in1,$in1,$key
	b		Loop256

.align	4
Ldone:
	lvx		$in1,0,$inp		# redundant in aligned case
	vsel		$in1,$outhead,$in1,$outmask
	stvx		$in1,0,$inp
	li		$ptr,0
	mtspr		256,$vrsave
	stw		$rounds,0($out)

Lenc_key_abort:
	mr		r3,$ptr
	blr
	.long		0
	.byte		0,12,0x14,1,0,0,3,0
	.long		0
.size	.${prefix}_set_encrypt_key,.-.${prefix}_set_encrypt_key

.globl	.${prefix}_set_decrypt_key
	$STU		$sp,-$FRAME($sp)
	mflr		r10
	$PUSH		r10,$FRAME+$LRSAVE($sp)
	bl		Lset_encrypt_key
	mtlr		r10

	cmpwi		r3,0
	bne-		Ldec_key_abort

	slwi		$cnt,$rounds,4
	subi		$inp,$out,240		# first round key
	srwi		$rounds,$rounds,1
	add		$out,$inp,$cnt		# last round key
	mtctr		$rounds

Ldeckey:
	lwz		r0, 0($inp)
	lwz		r6, 4($inp)
	lwz		r7, 8($inp)
	lwz		r8, 12($inp)
	addi		$inp,$inp,16
	lwz		r9, 0($out)
	lwz		r10,4($out)
	lwz		r11,8($out)
	lwz		r12,12($out)
	stw		r0, 0($out)
	stw		r6, 4($out)
	stw		r7, 8($out)
	stw		r8, 12($out)
	subi		$out,$out,16
	stw		r9, -16($inp)
	stw		r10,-12($inp)
	stw		r11,-8($inp)
	stw		r12,-4($inp)
	bdnz		Ldeckey

	xor		r3,r3,r3		# return value
Ldec_key_abort:
	addi		$sp,$sp,$FRAME
	blr
	.long		0
	.byte		0,12,4,1,0x80,0,3,0
	.long		0
.size	.${prefix}_set_decrypt_key,.-.${prefix}_set_decrypt_key
___
}}}
#########################################################################
{{{	# Single block en- and decrypt procedures			#
sub gen_block () {
my $dir = shift;
my $n   = $dir eq "de" ? "n" : "";
my ($inp,$out,$key,$rounds,$idx)=map("r$_",(3..7));

$code.=<<___;
.globl	.${prefix}_${dir}crypt
	lwz		$rounds,240($key)
	lis		r0,0xfc00
	mfspr		$vrsave,256
	li		$idx,15			# 15 is not typo
	mtspr		256,r0

	lvx		v0,0,$inp
	neg		r11,$out
	lvx		v1,$idx,$inp
	lvsl		v2,0,$inp		# inpperm
	le?vspltisb	v4,0x0f
	?lvsl		v3,0,r11		# outperm
	le?vxor		v2,v2,v4
	li		$idx,16
	vperm		v0,v0,v1,v2		# align [and byte swap in LE]
	lvx		v1,0,$key
	?lvsl		v5,0,$key		# keyperm
	srwi		$rounds,$rounds,1
	lvx		v2,$idx,$key
	addi		$idx,$idx,16
	subi		$rounds,$rounds,1
	?vperm		v1,v1,v2,v5		# align round key

	vxor		v0,v0,v1
	lvx		v1,$idx,$key
	addi		$idx,$idx,16
	mtctr		$rounds

Loop_${dir}c:
	?vperm		v2,v2,v1,v5
	v${n}cipher	v0,v0,v2
	lvx		v2,$idx,$key
	addi		$idx,$idx,16
	?vperm		v1,v1,v2,v5
	v${n}cipher	v0,v0,v1
	lvx		v1,$idx,$key
	addi		$idx,$idx,16
	bdnz		Loop_${dir}c

	?vperm		v2,v2,v1,v5
	v${n}cipher	v0,v0,v2
	lvx		v2,$idx,$key
	?vperm		v1,v1,v2,v5
	v${n}cipherlast	v0,v0,v1

	vspltisb	v2,-1
	vxor		v1,v1,v1
	li		$idx,15			# 15 is not typo
	?vperm		v2,v1,v2,v3		# outmask
	le?vxor		v3,v3,v4
	lvx		v1,0,$out		# outhead
	vperm		v0,v0,v0,v3		# rotate [and byte swap in LE]
	vsel		v1,v1,v0,v2
	lvx		v4,$idx,$out
	stvx		v1,0,$out
	vsel		v0,v0,v4,v2
	stvx		v0,$idx,$out

	mtspr		256,$vrsave
	blr
	.long		0
	.byte		0,12,0x14,0,0,0,3,0
	.long		0
.size	.${prefix}_${dir}crypt,.-.${prefix}_${dir}crypt
___
}
&gen_block("en");
&gen_block("de");
}}}

my $consts=1;
foreach(split("\n",$code)) {
        s/\`([^\`]*)\`/eval($1)/geo;

	# constants table endian-specific conversion
	if ($consts && m/\.(long|byte)\s+(.+)\s+(\?[a-z]*)$/o) {
	    my $conv=$3;
	    my @bytes=();

	    # convert to endian-agnostic format
	    if ($1 eq "long") {
	      foreach (split(/,\s*/,$2)) {
		my $l = /^0/?oct:int;
		push @bytes,($l>>24)&0xff,($l>>16)&0xff,($l>>8)&0xff,$l&0xff;
	      }
	    } else {
		@bytes = map(/^0/?oct:int,split(/,\s*/,$2));
	    }

	    # little-endian conversion
	    if ($flavour =~ /le$/o) {
		SWITCH: for($conv)  {
		    /\?inv/ && do   { @bytes=map($_^0xf,@bytes); last; };
		    /\?rev/ && do   { @bytes=reverse(@bytes);    last; };
		}
	    }

	    #emit
	    print ".byte\t",join(',',map (sprintf("0x%02x",$_),@bytes)),"\n";
	    next;
	}
	$consts=0 if (m/Lconsts:/o);	# end of table

	# instructions prefixed with '?' are endian-specific and need
	# to be adjusted accordingly...
	if ($flavour =~ /le$/o) {	# little-endian
	    s/le\?//o		or
	    s/be\?/#be#/o	or
	    s/\?lvsr/lvsl/o	or
	    s/\?lvsl/lvsr/o	or
	    s/\?(vperm\s+v[0-9]+,\s*)(v[0-9]+,\s*)(v[0-9]+,\s*)(v[0-9]+)/$1$3$2$4/o or
	    s/\?(vsldoi\s+v[0-9]+,\s*)(v[0-9]+,)\s*(v[0-9]+,\s*)([0-9]+)/$1$3$2 16-$4/o or
	    s/\?(vspltw\s+v[0-9]+,\s*)(v[0-9]+,)\s*([0-9])/$1$2 3-$3/o;
	} else {			# big-endian
	    s/le\?/#le#/o	or
	    s/be\?//o		or
	    s/\?([a-z]+)/$1/o;
	}

        print $_,"\n";
}

close STDOUT;