summaryrefslogtreecommitdiff
path: root/arch/x86/crypto/crct10dif-pcl-asm_64.S
blob: 35e97569d05ffe6d684b02d028e1854d6519159a (plain) (blame)
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
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
########################################################################
# Implement fast CRC-T10DIF computation with SSE and PCLMULQDQ instructions
#
# Copyright (c) 2013, Intel Corporation
#
# Authors:
#     Erdinc Ozturk <erdinc.ozturk@intel.com>
#     Vinodh Gopal <vinodh.gopal@intel.com>
#     James Guilford <james.guilford@intel.com>
#     Tim Chen <tim.c.chen@linux.intel.com>
#
# This software is available to you under a choice of one of two
# licenses.  You may choose to be licensed under the terms of the GNU
# General Public License (GPL) Version 2, available from the file
# COPYING in the main directory of this source tree, or the
# OpenIB.org BSD license below:
#
# 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 the above copyright
#   notice, 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 Intel Corporation nor the names of its
#   contributors may be used to endorse or promote products derived from
#   this software without specific prior written permission.
#
#
# THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION ""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 INTEL CORPORATION 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.
########################################################################
#       Function API:
#       UINT16 crc_t10dif_pcl(
#               UINT16 init_crc, //initial CRC value, 16 bits
#               const unsigned char *buf, //buffer pointer to calculate CRC on
#               UINT64 len //buffer length in bytes (64-bit data)
#       );
#
#       Reference paper titled "Fast CRC Computation for Generic
#	Polynomials Using PCLMULQDQ Instruction"
#       URL: http://www.intel.com/content/dam/www/public/us/en/documents
#  /white-papers/fast-crc-computation-generic-polynomials-pclmulqdq-paper.pdf
#
#

#include <linux/linkage.h>

.text

#define        arg1 %rdi
#define        arg2 %rsi
#define        arg3 %rdx

#define        arg1_low32 %edi

ENTRY(crc_t10dif_pcl)
.align 16

	# adjust the 16-bit initial_crc value, scale it to 32 bits
	shl	$16, arg1_low32

	# Allocate Stack Space
	mov     %rsp, %rcx
	sub	$16*2, %rsp
	# align stack to 16 byte boundary
	and     $~(0x10 - 1), %rsp

	# check if smaller than 256
	cmp	$256, arg3

	# for sizes less than 128, we can't fold 64B at a time...
	jl	_less_than_128


	# load the initial crc value
	movd	arg1_low32, %xmm10	# initial crc

	# crc value does not need to be byte-reflected, but it needs
	# to be moved to the high part of the register.
	# because data will be byte-reflected and will align with
	# initial crc at correct place.
	pslldq	$12, %xmm10

	movdqa  SHUF_MASK(%rip), %xmm11
	# receive the initial 64B data, xor the initial crc value
	movdqu	16*0(arg2), %xmm0
	movdqu	16*1(arg2), %xmm1
	movdqu	16*2(arg2), %xmm2
	movdqu	16*3(arg2), %xmm3
	movdqu	16*4(arg2), %xmm4
	movdqu	16*5(arg2), %xmm5
	movdqu	16*6(arg2), %xmm6
	movdqu	16*7(arg2), %xmm7

	pshufb	%xmm11, %xmm0
	# XOR the initial_crc value
	pxor	%xmm10, %xmm0
	pshufb	%xmm11, %xmm1
	pshufb	%xmm11, %xmm2
	pshufb	%xmm11, %xmm3
	pshufb	%xmm11, %xmm4
	pshufb	%xmm11, %xmm5
	pshufb	%xmm11, %xmm6
	pshufb	%xmm11, %xmm7

	movdqa	rk3(%rip), %xmm10	#xmm10 has rk3 and rk4
					#imm value of pclmulqdq instruction
					#will determine which constant to use

	#################################################################
	# we subtract 256 instead of 128 to save one instruction from the loop
	sub	$256, arg3

	# at this section of the code, there is 64*x+y (0<=y<64) bytes of
	# buffer. The _fold_64_B_loop will fold 64B at a time
	# until we have 64+y Bytes of buffer


	# fold 64B at a time. This section of the code folds 4 xmm
	# registers in parallel
_fold_64_B_loop:

	# update the buffer pointer
	add	$128, arg2		#    buf += 64#

	movdqu	16*0(arg2), %xmm9
	movdqu	16*1(arg2), %xmm12
	pshufb	%xmm11, %xmm9
	pshufb	%xmm11, %xmm12
	movdqa	%xmm0, %xmm8
	movdqa	%xmm1, %xmm13
	pclmulqdq	$0x0 , %xmm10, %xmm0
	pclmulqdq	$0x11, %xmm10, %xmm8
	pclmulqdq	$0x0 , %xmm10, %xmm1
	pclmulqdq	$0x11, %xmm10, %xmm13
	pxor	%xmm9 , %xmm0
	xorps	%xmm8 , %xmm0
	pxor	%xmm12, %xmm1
	xorps	%xmm13, %xmm1

	movdqu	16*2(arg2), %xmm9
	movdqu	16*3(arg2), %xmm12
	pshufb	%xmm11, %xmm9
	pshufb	%xmm11, %xmm12
	movdqa	%xmm2, %xmm8
	movdqa	%xmm3, %xmm13
	pclmulqdq	$0x0, %xmm10, %xmm2
	pclmulqdq	$0x11, %xmm10, %xmm8
	pclmulqdq	$0x0, %xmm10, %xmm3
	pclmulqdq	$0x11, %xmm10, %xmm13
	pxor	%xmm9 , %xmm2
	xorps	%xmm8 , %xmm2
	pxor	%xmm12, %xmm3
	xorps	%xmm13, %xmm3

	movdqu	16*4(arg2), %xmm9
	movdqu	16*5(arg2), %xmm12
	pshufb	%xmm11, %xmm9
	pshufb	%xmm11, %xmm12
	movdqa	%xmm4, %xmm8
	movdqa	%xmm5, %xmm13
	pclmulqdq	$0x0,  %xmm10, %xmm4
	pclmulqdq	$0x11, %xmm10, %xmm8
	pclmulqdq	$0x0,  %xmm10, %xmm5
	pclmulqdq	$0x11, %xmm10, %xmm13
	pxor	%xmm9 ,  %xmm4
	xorps	%xmm8 ,  %xmm4
	pxor	%xmm12,  %xmm5
	xorps	%xmm13,  %xmm5

	movdqu	16*6(arg2), %xmm9
	movdqu	16*7(arg2), %xmm12
	pshufb	%xmm11, %xmm9
	pshufb	%xmm11, %xmm12
	movdqa	%xmm6 , %xmm8
	movdqa	%xmm7 , %xmm13
	pclmulqdq	$0x0 , %xmm10, %xmm6
	pclmulqdq	$0x11, %xmm10, %xmm8
	pclmulqdq	$0x0 , %xmm10, %xmm7
	pclmulqdq	$0x11, %xmm10, %xmm13
	pxor	%xmm9 , %xmm6
	xorps	%xmm8 , %xmm6
	pxor	%xmm12, %xmm7
	xorps	%xmm13, %xmm7

	sub	$128, arg3

	# check if there is another 64B in the buffer to be able to fold
	jge	_fold_64_B_loop
	##################################################################


	add	$128, arg2
	# at this point, the buffer pointer is pointing at the last y Bytes
	# of the buffer the 64B of folded data is in 4 of the xmm
	# registers: xmm0, xmm1, xmm2, xmm3


	# fold the 8 xmm registers to 1 xmm register with different constants

	movdqa	rk9(%rip), %xmm10
	movdqa	%xmm0, %xmm8
	pclmulqdq	$0x11, %xmm10, %xmm0
	pclmulqdq	$0x0 , %xmm10, %xmm8
	pxor	%xmm8, %xmm7
	xorps	%xmm0, %xmm7

	movdqa	rk11(%rip), %xmm10
	movdqa	%xmm1, %xmm8
	pclmulqdq	 $0x11, %xmm10, %xmm1
	pclmulqdq	 $0x0 , %xmm10, %xmm8
	pxor	%xmm8, %xmm7
	xorps	%xmm1, %xmm7

	movdqa	rk13(%rip), %xmm10
	movdqa	%xmm2, %xmm8
	pclmulqdq	 $0x11, %xmm10, %xmm2
	pclmulqdq	 $0x0 , %xmm10, %xmm8
	pxor	%xmm8, %xmm7
	pxor	%xmm2, %xmm7

	movdqa	rk15(%rip), %xmm10
	movdqa	%xmm3, %xmm8
	pclmulqdq	$0x11, %xmm10, %xmm3
	pclmulqdq	$0x0 , %xmm10, %xmm8
	pxor	%xmm8, %xmm7
	xorps	%xmm3, %xmm7

	movdqa	rk17(%rip), %xmm10
	movdqa	%xmm4, %xmm8
	pclmulqdq	$0x11, %xmm10, %xmm4
	pclmulqdq	$0x0 , %xmm10, %xmm8
	pxor	%xmm8, %xmm7
	pxor	%xmm4, %xmm7

	movdqa	rk19(%rip), %xmm10
	movdqa	%xmm5, %xmm8
	pclmulqdq	$0x11, %xmm10, %xmm5
	pclmulqdq	$0x0 , %xmm10, %xmm8
	pxor	%xmm8, %xmm7
	xorps	%xmm5, %xmm7

	movdqa	rk1(%rip), %xmm10	#xmm10 has rk1 and rk2
					#imm value of pclmulqdq instruction
					#will determine which constant to use
	movdqa	%xmm6, %xmm8
	pclmulqdq	$0x11, %xmm10, %xmm6
	pclmulqdq	$0x0 , %xmm10, %xmm8
	pxor	%xmm8, %xmm7
	pxor	%xmm6, %xmm7


	# instead of 64, we add 48 to the loop counter to save 1 instruction
	# from the loop instead of a cmp instruction, we use the negative
	# flag with the jl instruction
	add	$128-16, arg3
	jl	_final_reduction_for_128

	# now we have 16+y bytes left to reduce. 16 Bytes is in register xmm7
	# and the rest is in memory. We can fold 16 bytes at a time if y>=16
	# continue folding 16B at a time

_16B_reduction_loop:
	movdqa	%xmm7, %xmm8
	pclmulqdq	$0x11, %xmm10, %xmm7
	pclmulqdq	$0x0 , %xmm10, %xmm8
	pxor	%xmm8, %xmm7
	movdqu	(arg2), %xmm0
	pshufb	%xmm11, %xmm0
	pxor	%xmm0 , %xmm7
	add	$16, arg2
	sub	$16, arg3
	# instead of a cmp instruction, we utilize the flags with the
	# jge instruction equivalent of: cmp arg3, 16-16
	# check if there is any more 16B in the buffer to be able to fold
	jge	_16B_reduction_loop

	#now we have 16+z bytes left to reduce, where 0<= z < 16.
	#first, we reduce the data in the xmm7 register


_final_reduction_for_128:
	# check if any more data to fold. If not, compute the CRC of
	# the final 128 bits
	add	$16, arg3
	je	_128_done

	# here we are getting data that is less than 16 bytes.
	# since we know that there was data before the pointer, we can
	# offset the input pointer before the actual point, to receive
	# exactly 16 bytes. after that the registers need to be adjusted.
_get_last_two_xmms:
	movdqa	%xmm7, %xmm2

	movdqu	-16(arg2, arg3), %xmm1
	pshufb	%xmm11, %xmm1

	# get rid of the extra data that was loaded before
	# load the shift constant
	lea	pshufb_shf_table+16(%rip), %rax
	sub	arg3, %rax
	movdqu	(%rax), %xmm0

	# shift xmm2 to the left by arg3 bytes
	pshufb	%xmm0, %xmm2

	# shift xmm7 to the right by 16-arg3 bytes
	pxor	mask1(%rip), %xmm0
	pshufb	%xmm0, %xmm7
	pblendvb	%xmm2, %xmm1	#xmm0 is implicit

	# fold 16 Bytes
	movdqa	%xmm1, %xmm2
	movdqa	%xmm7, %xmm8
	pclmulqdq	$0x11, %xmm10, %xmm7
	pclmulqdq	$0x0 , %xmm10, %xmm8
	pxor	%xmm8, %xmm7
	pxor	%xmm2, %xmm7

_128_done:
	# compute crc of a 128-bit value
	movdqa	rk5(%rip), %xmm10	# rk5 and rk6 in xmm10
	movdqa	%xmm7, %xmm0

	#64b fold
	pclmulqdq	$0x1, %xmm10, %xmm7
	pslldq	$8   ,  %xmm0
	pxor	%xmm0,  %xmm7

	#32b fold
	movdqa	%xmm7, %xmm0

	pand	mask2(%rip), %xmm0

	psrldq	$12, %xmm7
	pclmulqdq	$0x10, %xmm10, %xmm7
	pxor	%xmm0, %xmm7

	#barrett reduction
_barrett:
	movdqa	rk7(%rip), %xmm10	# rk7 and rk8 in xmm10
	movdqa	%xmm7, %xmm0
	pclmulqdq	$0x01, %xmm10, %xmm7
	pslldq	$4, %xmm7
	pclmulqdq	$0x11, %xmm10, %xmm7

	pslldq	$4, %xmm7
	pxor	%xmm0, %xmm7
	pextrd	$1, %xmm7, %eax

_cleanup:
	# scale the result back to 16 bits
	shr	$16, %eax
	mov     %rcx, %rsp
	ret

########################################################################

.align 16
_less_than_128:

	# check if there is enough buffer to be able to fold 16B at a time
	cmp	$32, arg3
	jl	_less_than_32
	movdqa  SHUF_MASK(%rip), %xmm11

	# now if there is, load the constants
	movdqa	rk1(%rip), %xmm10	# rk1 and rk2 in xmm10

	movd	arg1_low32, %xmm0	# get the initial crc value
	pslldq	$12, %xmm0	# align it to its correct place
	movdqu	(arg2), %xmm7	# load the plaintext
	pshufb	%xmm11, %xmm7	# byte-reflect the plaintext
	pxor	%xmm0, %xmm7


	# update the buffer pointer
	add	$16, arg2

	# update the counter. subtract 32 instead of 16 to save one
	# instruction from the loop
	sub	$32, arg3

	jmp	_16B_reduction_loop


.align 16
_less_than_32:
	# mov initial crc to the return value. this is necessary for
	# zero-length buffers.
	mov	arg1_low32, %eax
	test	arg3, arg3
	je	_cleanup

	movdqa  SHUF_MASK(%rip), %xmm11

	movd	arg1_low32, %xmm0	# get the initial crc value
	pslldq	$12, %xmm0	# align it to its correct place

	cmp	$16, arg3
	je	_exact_16_left
	jl	_less_than_16_left

	movdqu	(arg2), %xmm7	# load the plaintext
	pshufb	%xmm11, %xmm7	# byte-reflect the plaintext
	pxor	%xmm0 , %xmm7	# xor the initial crc value
	add	$16, arg2
	sub	$16, arg3
	movdqa	rk1(%rip), %xmm10	# rk1 and rk2 in xmm10
	jmp	_get_last_two_xmms


.align 16
_less_than_16_left:
	# use stack space to load data less than 16 bytes, zero-out
	# the 16B in memory first.

	pxor	%xmm1, %xmm1
	mov	%rsp, %r11
	movdqa	%xmm1, (%r11)

	cmp	$4, arg3
	jl	_only_less_than_4

	# backup the counter value
	mov	arg3, %r9
	cmp	$8, arg3
	jl	_less_than_8_left

	# load 8 Bytes
	mov	(arg2), %rax
	mov	%rax, (%r11)
	add	$8, %r11
	sub	$8, arg3
	add	$8, arg2
_less_than_8_left:

	cmp	$4, arg3
	jl	_less_than_4_left

	# load 4 Bytes
	mov	(arg2), %eax
	mov	%eax, (%r11)
	add	$4, %r11
	sub	$4, arg3
	add	$4, arg2
_less_than_4_left:

	cmp	$2, arg3
	jl	_less_than_2_left

	# load 2 Bytes
	mov	(arg2), %ax
	mov	%ax, (%r11)
	add	$2, %r11
	sub	$2, arg3
	add	$2, arg2
_less_than_2_left:
	cmp     $1, arg3
        jl      _zero_left

	# load 1 Byte
	mov	(arg2), %al
	mov	%al, (%r11)
_zero_left:
	movdqa	(%rsp), %xmm7
	pshufb	%xmm11, %xmm7
	pxor	%xmm0 , %xmm7	# xor the initial crc value

	# shl r9, 4
	lea	pshufb_shf_table+16(%rip), %rax
	sub	%r9, %rax
	movdqu	(%rax), %xmm0
	pxor	mask1(%rip), %xmm0

	pshufb	%xmm0, %xmm7
	jmp	_128_done

.align 16
_exact_16_left:
	movdqu	(arg2), %xmm7
	pshufb	%xmm11, %xmm7
	pxor	%xmm0 , %xmm7   # xor the initial crc value

	jmp	_128_done

_only_less_than_4:
	cmp	$3, arg3
	jl	_only_less_than_3

	# load 3 Bytes
	mov	(arg2), %al
	mov	%al, (%r11)

	mov	1(arg2), %al
	mov	%al, 1(%r11)

	mov	2(arg2), %al
	mov	%al, 2(%r11)

	movdqa	 (%rsp), %xmm7
	pshufb	 %xmm11, %xmm7
	pxor	 %xmm0 , %xmm7  # xor the initial crc value

	psrldq	$5, %xmm7

	jmp	_barrett
_only_less_than_3:
	cmp	$2, arg3
	jl	_only_less_than_2

	# load 2 Bytes
	mov	(arg2), %al
	mov	%al, (%r11)

	mov	1(arg2), %al
	mov	%al, 1(%r11)

	movdqa	(%rsp), %xmm7
	pshufb	%xmm11, %xmm7
	pxor	%xmm0 , %xmm7   # xor the initial crc value

	psrldq	$6, %xmm7

	jmp	_barrett
_only_less_than_2:

	# load 1 Byte
	mov	(arg2), %al
	mov	%al, (%r11)

	movdqa	(%rsp), %xmm7
	pshufb	%xmm11, %xmm7
	pxor	%xmm0 , %xmm7   # xor the initial crc value

	psrldq	$7, %xmm7

	jmp	_barrett

ENDPROC(crc_t10dif_pcl)

.data

# precomputed constants
# these constants are precomputed from the poly:
# 0x8bb70000 (0x8bb7 scaled to 32 bits)
.align 16
# Q = 0x18BB70000
# rk1 = 2^(32*3) mod Q << 32
# rk2 = 2^(32*5) mod Q << 32
# rk3 = 2^(32*15) mod Q << 32
# rk4 = 2^(32*17) mod Q << 32
# rk5 = 2^(32*3) mod Q << 32
# rk6 = 2^(32*2) mod Q << 32
# rk7 = floor(2^64/Q)
# rk8 = Q
rk1:
.quad 0x2d56000000000000
rk2:
.quad 0x06df000000000000
rk3:
.quad 0x9d9d000000000000
rk4:
.quad 0x7cf5000000000000
rk5:
.quad 0x2d56000000000000
rk6:
.quad 0x1368000000000000
rk7:
.quad 0x00000001f65a57f8
rk8:
.quad 0x000000018bb70000

rk9:
.quad 0xceae000000000000
rk10:
.quad 0xbfd6000000000000
rk11:
.quad 0x1e16000000000000
rk12:
.quad 0x713c000000000000
rk13:
.quad 0xf7f9000000000000
rk14:
.quad 0x80a6000000000000
rk15:
.quad 0x044c000000000000
rk16:
.quad 0xe658000000000000
rk17:
.quad 0xad18000000000000
rk18:
.quad 0xa497000000000000
rk19:
.quad 0x6ee3000000000000
rk20:
.quad 0xe7b5000000000000



mask1:
.octa 0x80808080808080808080808080808080
mask2:
.octa 0x00000000FFFFFFFFFFFFFFFFFFFFFFFF

SHUF_MASK:
.octa 0x000102030405060708090A0B0C0D0E0F

pshufb_shf_table:
# use these values for shift constants for the pshufb instruction
# different alignments result in values as shown:
#	DDQ 0x008f8e8d8c8b8a898887868584838281 # shl 15 (16-1) / shr1
#	DDQ 0x01008f8e8d8c8b8a8988878685848382 # shl 14 (16-3) / shr2
#	DDQ 0x0201008f8e8d8c8b8a89888786858483 # shl 13 (16-4) / shr3
#	DDQ 0x030201008f8e8d8c8b8a898887868584 # shl 12 (16-4) / shr4
#	DDQ 0x04030201008f8e8d8c8b8a8988878685 # shl 11 (16-5) / shr5
#	DDQ 0x0504030201008f8e8d8c8b8a89888786 # shl 10 (16-6) / shr6
#	DDQ 0x060504030201008f8e8d8c8b8a898887 # shl 9  (16-7) / shr7
#	DDQ 0x07060504030201008f8e8d8c8b8a8988 # shl 8  (16-8) / shr8
#	DDQ 0x0807060504030201008f8e8d8c8b8a89 # shl 7  (16-9) / shr9
#	DDQ 0x090807060504030201008f8e8d8c8b8a # shl 6  (16-10) / shr10
#	DDQ 0x0a090807060504030201008f8e8d8c8b # shl 5  (16-11) / shr11
#	DDQ 0x0b0a090807060504030201008f8e8d8c # shl 4  (16-12) / shr12
#	DDQ 0x0c0b0a090807060504030201008f8e8d # shl 3  (16-13) / shr13
#	DDQ 0x0d0c0b0a090807060504030201008f8e # shl 2  (16-14) / shr14
#	DDQ 0x0e0d0c0b0a090807060504030201008f # shl 1  (16-15) / shr15
.octa 0x8f8e8d8c8b8a89888786858483828100
.octa 0x000e0d0c0b0a09080706050403020100