summaryrefslogtreecommitdiffstats
path: root/arch/arm/crypto/sha512-armv4.pl
blob: 788c17b56ecceb5e607382539faec13b8fbc2886 (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
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
644
645
646
647
648
649
650
651
652
653
654
655
656
657
#!/usr/bin/env perl
# SPDX-License-Identifier: GPL-2.0

# This code is taken from the OpenSSL project but the author (Andy Polyakov)
# has relicensed it under the GPLv2. 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.
#
# The original headers, including the original license headers, are
# included below for completeness.

# ====================================================================
# 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 http://www.openssl.org/~appro/cryptogams/.
# ====================================================================

# SHA512 block procedure for ARMv4. September 2007.

# This code is ~4.5 (four and a half) times faster than code generated
# by gcc 3.4 and it spends ~72 clock cycles per byte [on single-issue
# Xscale PXA250 core].
#
# July 2010.
#
# Rescheduling for dual-issue pipeline resulted in 6% improvement on
# Cortex A8 core and ~40 cycles per processed byte.

# February 2011.
#
# Profiler-assisted and platform-specific optimization resulted in 7%
# improvement on Coxtex A8 core and ~38 cycles per byte.

# March 2011.
#
# Add NEON implementation. On Cortex A8 it was measured to process
# one byte in 23.3 cycles or ~60% faster than integer-only code.

# August 2012.
#
# Improve NEON performance by 12% on Snapdragon S4. In absolute
# terms it's 22.6 cycles per byte, which is disappointing result.
# Technical writers asserted that 3-way S4 pipeline can sustain
# multiple NEON instructions per cycle, but dual NEON issue could
# not be observed, see http://www.openssl.org/~appro/Snapdragon-S4.html
# for further details. On side note Cortex-A15 processes one byte in
# 16 cycles.

# Byte order [in]dependence. =========================================
#
# Originally caller was expected to maintain specific *dword* order in
# h[0-7], namely with most significant dword at *lower* address, which
# was reflected in below two parameters as 0 and 4. Now caller is
# expected to maintain native byte order for whole 64-bit values.
$hi="HI";
$lo="LO";
# ====================================================================

while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {}
open STDOUT,">$output";

$ctx="r0";	# parameter block
$inp="r1";
$len="r2";

$Tlo="r3";
$Thi="r4";
$Alo="r5";
$Ahi="r6";
$Elo="r7";
$Ehi="r8";
$t0="r9";
$t1="r10";
$t2="r11";
$t3="r12";
############	r13 is stack pointer
$Ktbl="r14";
############	r15 is program counter

$Aoff=8*0;
$Boff=8*1;
$Coff=8*2;
$Doff=8*3;
$Eoff=8*4;
$Foff=8*5;
$Goff=8*6;
$Hoff=8*7;
$Xoff=8*8;

sub BODY_00_15() {
my $magic = shift;
$code.=<<___;
	@ Sigma1(x)	(ROTR((x),14) ^ ROTR((x),18)  ^ ROTR((x),41))
	@ LO		lo>>14^hi<<18 ^ lo>>18^hi<<14 ^ hi>>9^lo<<23
	@ HI		hi>>14^lo<<18 ^ hi>>18^lo<<14 ^ lo>>9^hi<<23
	mov	$t0,$Elo,lsr#14
	str	$Tlo,[sp,#$Xoff+0]
	mov	$t1,$Ehi,lsr#14
	str	$Thi,[sp,#$Xoff+4]
	eor	$t0,$t0,$Ehi,lsl#18
	ldr	$t2,[sp,#$Hoff+0]	@ h.lo
	eor	$t1,$t1,$Elo,lsl#18
	ldr	$t3,[sp,#$Hoff+4]	@ h.hi
	eor	$t0,$t0,$Elo,lsr#18
	eor	$t1,$t1,$Ehi,lsr#18
	eor	$t0,$t0,$Ehi,lsl#14
	eor	$t1,$t1,$Elo,lsl#14
	eor	$t0,$t0,$Ehi,lsr#9
	eor	$t1,$t1,$Elo,lsr#9
	eor	$t0,$t0,$Elo,lsl#23
	eor	$t1,$t1,$Ehi,lsl#23	@ Sigma1(e)
	adds	$Tlo,$Tlo,$t0
	ldr	$t0,[sp,#$Foff+0]	@ f.lo
	adc	$Thi,$Thi,$t1		@ T += Sigma1(e)
	ldr	$t1,[sp,#$Foff+4]	@ f.hi
	adds	$Tlo,$Tlo,$t2
	ldr	$t2,[sp,#$Goff+0]	@ g.lo
	adc	$Thi,$Thi,$t3		@ T += h
	ldr	$t3,[sp,#$Goff+4]	@ g.hi

	eor	$t0,$t0,$t2
	str	$Elo,[sp,#$Eoff+0]
	eor	$t1,$t1,$t3
	str	$Ehi,[sp,#$Eoff+4]
	and	$t0,$t0,$Elo
	str	$Alo,[sp,#$Aoff+0]
	and	$t1,$t1,$Ehi
	str	$Ahi,[sp,#$Aoff+4]
	eor	$t0,$t0,$t2
	ldr	$t2,[$Ktbl,#$lo]	@ K[i].lo
	eor	$t1,$t1,$t3		@ Ch(e,f,g)
	ldr	$t3,[$Ktbl,#$hi]	@ K[i].hi

	adds	$Tlo,$Tlo,$t0
	ldr	$Elo,[sp,#$Doff+0]	@ d.lo
	adc	$Thi,$Thi,$t1		@ T += Ch(e,f,g)
	ldr	$Ehi,[sp,#$Doff+4]	@ d.hi
	adds	$Tlo,$Tlo,$t2
	and	$t0,$t2,#0xff
	adc	$Thi,$Thi,$t3		@ T += K[i]
	adds	$Elo,$Elo,$Tlo
	ldr	$t2,[sp,#$Boff+0]	@ b.lo
	adc	$Ehi,$Ehi,$Thi		@ d += T
	teq	$t0,#$magic

	ldr	$t3,[sp,#$Coff+0]	@ c.lo
#if __ARM_ARCH__>=7
	it	eq			@ Thumb2 thing, sanity check in ARM
#endif
	orreq	$Ktbl,$Ktbl,#1
	@ Sigma0(x)	(ROTR((x),28) ^ ROTR((x),34) ^ ROTR((x),39))
	@ LO		lo>>28^hi<<4  ^ hi>>2^lo<<30 ^ hi>>7^lo<<25
	@ HI		hi>>28^lo<<4  ^ lo>>2^hi<<30 ^ lo>>7^hi<<25
	mov	$t0,$Alo,lsr#28
	mov	$t1,$Ahi,lsr#28
	eor	$t0,$t0,$Ahi,lsl#4
	eor	$t1,$t1,$Alo,lsl#4
	eor	$t0,$t0,$Ahi,lsr#2
	eor	$t1,$t1,$Alo,lsr#2
	eor	$t0,$t0,$Alo,lsl#30
	eor	$t1,$t1,$Ahi,lsl#30
	eor	$t0,$t0,$Ahi,lsr#7
	eor	$t1,$t1,$Alo,lsr#7
	eor	$t0,$t0,$Alo,lsl#25
	eor	$t1,$t1,$Ahi,lsl#25	@ Sigma0(a)
	adds	$Tlo,$Tlo,$t0
	and	$t0,$Alo,$t2
	adc	$Thi,$Thi,$t1		@ T += Sigma0(a)

	ldr	$t1,[sp,#$Boff+4]	@ b.hi
	orr	$Alo,$Alo,$t2
	ldr	$t2,[sp,#$Coff+4]	@ c.hi
	and	$Alo,$Alo,$t3
	and	$t3,$Ahi,$t1
	orr	$Ahi,$Ahi,$t1
	orr	$Alo,$Alo,$t0		@ Maj(a,b,c).lo
	and	$Ahi,$Ahi,$t2
	adds	$Alo,$Alo,$Tlo
	orr	$Ahi,$Ahi,$t3		@ Maj(a,b,c).hi
	sub	sp,sp,#8
	adc	$Ahi,$Ahi,$Thi		@ h += T
	tst	$Ktbl,#1
	add	$Ktbl,$Ktbl,#8
___
}
$code=<<___;
#ifndef __KERNEL__
# include "arm_arch.h"
# define VFP_ABI_PUSH	vstmdb	sp!,{d8-d15}
# define VFP_ABI_POP	vldmia	sp!,{d8-d15}
#else
# define __ARM_ARCH__ __LINUX_ARM_ARCH__
# define __ARM_MAX_ARCH__ 7
# define VFP_ABI_PUSH
# define VFP_ABI_POP
#endif

#ifdef __ARMEL__
# define LO 0
# define HI 4
# define WORD64(hi0,lo0,hi1,lo1)	.word	lo0,hi0, lo1,hi1
#else
# define HI 0
# define LO 4
# define WORD64(hi0,lo0,hi1,lo1)	.word	hi0,lo0, hi1,lo1
#endif

.text
#if __ARM_ARCH__<7
.code	32
#else
.syntax unified
# ifdef __thumb2__
#  define adrl adr
.thumb
# else
.code   32
# endif
#endif

.type	K512,%object
.align	5
K512:
WORD64(0x428a2f98,0xd728ae22, 0x71374491,0x23ef65cd)
WORD64(0xb5c0fbcf,0xec4d3b2f, 0xe9b5dba5,0x8189dbbc)
WORD64(0x3956c25b,0xf348b538, 0x59f111f1,0xb605d019)
WORD64(0x923f82a4,0xaf194f9b, 0xab1c5ed5,0xda6d8118)
WORD64(0xd807aa98,0xa3030242, 0x12835b01,0x45706fbe)
WORD64(0x243185be,0x4ee4b28c, 0x550c7dc3,0xd5ffb4e2)
WORD64(0x72be5d74,0xf27b896f, 0x80deb1fe,0x3b1696b1)
WORD64(0x9bdc06a7,0x25c71235, 0xc19bf174,0xcf692694)
WORD64(0xe49b69c1,0x9ef14ad2, 0xefbe4786,0x384f25e3)
WORD64(0x0fc19dc6,0x8b8cd5b5, 0x240ca1cc,0x77ac9c65)
WORD64(0x2de92c6f,0x592b0275, 0x4a7484aa,0x6ea6e483)
WORD64(0x5cb0a9dc,0xbd41fbd4, 0x76f988da,0x831153b5)
WORD64(0x983e5152,0xee66dfab, 0xa831c66d,0x2db43210)
WORD64(0xb00327c8,0x98fb213f, 0xbf597fc7,0xbeef0ee4)
WORD64(0xc6e00bf3,0x3da88fc2, 0xd5a79147,0x930aa725)
WORD64(0x06ca6351,0xe003826f, 0x14292967,0x0a0e6e70)
WORD64(0x27b70a85,0x46d22ffc, 0x2e1b2138,0x5c26c926)
WORD64(0x4d2c6dfc,0x5ac42aed, 0x53380d13,0x9d95b3df)
WORD64(0x650a7354,0x8baf63de, 0x766a0abb,0x3c77b2a8)
WORD64(0x81c2c92e,0x47edaee6, 0x92722c85,0x1482353b)
WORD64(0xa2bfe8a1,0x4cf10364, 0xa81a664b,0xbc423001)
WORD64(0xc24b8b70,0xd0f89791, 0xc76c51a3,0x0654be30)
WORD64(0xd192e819,0xd6ef5218, 0xd6990624,0x5565a910)
WORD64(0xf40e3585,0x5771202a, 0x106aa070,0x32bbd1b8)
WORD64(0x19a4c116,0xb8d2d0c8, 0x1e376c08,0x5141ab53)
WORD64(0x2748774c,0xdf8eeb99, 0x34b0bcb5,0xe19b48a8)
WORD64(0x391c0cb3,0xc5c95a63, 0x4ed8aa4a,0xe3418acb)
WORD64(0x5b9cca4f,0x7763e373, 0x682e6ff3,0xd6b2b8a3)
WORD64(0x748f82ee,0x5defb2fc, 0x78a5636f,0x43172f60)
WORD64(0x84c87814,0xa1f0ab72, 0x8cc70208,0x1a6439ec)
WORD64(0x90befffa,0x23631e28, 0xa4506ceb,0xde82bde9)
WORD64(0xbef9a3f7,0xb2c67915, 0xc67178f2,0xe372532b)
WORD64(0xca273ece,0xea26619c, 0xd186b8c7,0x21c0c207)
WORD64(0xeada7dd6,0xcde0eb1e, 0xf57d4f7f,0xee6ed178)
WORD64(0x06f067aa,0x72176fba, 0x0a637dc5,0xa2c898a6)
WORD64(0x113f9804,0xbef90dae, 0x1b710b35,0x131c471b)
WORD64(0x28db77f5,0x23047d84, 0x32caab7b,0x40c72493)
WORD64(0x3c9ebe0a,0x15c9bebc, 0x431d67c4,0x9c100d4c)
WORD64(0x4cc5d4be,0xcb3e42b6, 0x597f299c,0xfc657e2a)
WORD64(0x5fcb6fab,0x3ad6faec, 0x6c44198c,0x4a475817)
.size	K512,.-K512
#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
.LOPENSSL_armcap:
.word	OPENSSL_armcap_P-sha512_block_data_order
.skip	32-4
#else
.skip	32
#endif

.global	sha512_block_data_order
.type	sha512_block_data_order,%function
sha512_block_data_order:
.Lsha512_block_data_order:
#if __ARM_ARCH__<7
	sub	r3,pc,#8		@ sha512_block_data_order
#else
	adr	r3,.Lsha512_block_data_order
#endif
#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
	ldr	r12,.LOPENSSL_armcap
	ldr	r12,[r3,r12]		@ OPENSSL_armcap_P
	tst	r12,#1
	bne	.LNEON
#endif
	add	$len,$inp,$len,lsl#7	@ len to point at the end of inp
	stmdb	sp!,{r4-r12,lr}
	sub	$Ktbl,r3,#672		@ K512
	sub	sp,sp,#9*8

	ldr	$Elo,[$ctx,#$Eoff+$lo]
	ldr	$Ehi,[$ctx,#$Eoff+$hi]
	ldr	$t0, [$ctx,#$Goff+$lo]
	ldr	$t1, [$ctx,#$Goff+$hi]
	ldr	$t2, [$ctx,#$Hoff+$lo]
	ldr	$t3, [$ctx,#$Hoff+$hi]
.Loop:
	str	$t0, [sp,#$Goff+0]
	str	$t1, [sp,#$Goff+4]
	str	$t2, [sp,#$Hoff+0]
	str	$t3, [sp,#$Hoff+4]
	ldr	$Alo,[$ctx,#$Aoff+$lo]
	ldr	$Ahi,[$ctx,#$Aoff+$hi]
	ldr	$Tlo,[$ctx,#$Boff+$lo]
	ldr	$Thi,[$ctx,#$Boff+$hi]
	ldr	$t0, [$ctx,#$Coff+$lo]
	ldr	$t1, [$ctx,#$Coff+$hi]
	ldr	$t2, [$ctx,#$Doff+$lo]
	ldr	$t3, [$ctx,#$Doff+$hi]
	str	$Tlo,[sp,#$Boff+0]
	str	$Thi,[sp,#$Boff+4]
	str	$t0, [sp,#$Coff+0]
	str	$t1, [sp,#$Coff+4]
	str	$t2, [sp,#$Doff+0]
	str	$t3, [sp,#$Doff+4]
	ldr	$Tlo,[$ctx,#$Foff+$lo]
	ldr	$Thi,[$ctx,#$Foff+$hi]
	str	$Tlo,[sp,#$Foff+0]
	str	$Thi,[sp,#$Foff+4]

.L00_15:
#if __ARM_ARCH__<7
	ldrb	$Tlo,[$inp,#7]
	ldrb	$t0, [$inp,#6]
	ldrb	$t1, [$inp,#5]
	ldrb	$t2, [$inp,#4]
	ldrb	$Thi,[$inp,#3]
	ldrb	$t3, [$inp,#2]
	orr	$Tlo,$Tlo,$t0,lsl#8
	ldrb	$t0, [$inp,#1]
	orr	$Tlo,$Tlo,$t1,lsl#16
	ldrb	$t1, [$inp],#8
	orr	$Tlo,$Tlo,$t2,lsl#24
	orr	$Thi,$Thi,$t3,lsl#8
	orr	$Thi,$Thi,$t0,lsl#16
	orr	$Thi,$Thi,$t1,lsl#24
#else
	ldr	$Tlo,[$inp,#4]
	ldr	$Thi,[$inp],#8
#ifdef __ARMEL__
	rev	$Tlo,$Tlo
	rev	$Thi,$Thi
#endif
#endif
___
	&BODY_00_15(0x94);
$code.=<<___;
	tst	$Ktbl,#1
	beq	.L00_15
	ldr	$t0,[sp,#`$Xoff+8*(16-1)`+0]
	ldr	$t1,[sp,#`$Xoff+8*(16-1)`+4]
	bic	$Ktbl,$Ktbl,#1
.L16_79:
	@ sigma0(x)	(ROTR((x),1)  ^ ROTR((x),8)  ^ ((x)>>7))
	@ LO		lo>>1^hi<<31  ^ lo>>8^hi<<24 ^ lo>>7^hi<<25
	@ HI		hi>>1^lo<<31  ^ hi>>8^lo<<24 ^ hi>>7
	mov	$Tlo,$t0,lsr#1
	ldr	$t2,[sp,#`$Xoff+8*(16-14)`+0]
	mov	$Thi,$t1,lsr#1
	ldr	$t3,[sp,#`$Xoff+8*(16-14)`+4]
	eor	$Tlo,$Tlo,$t1,lsl#31
	eor	$Thi,$Thi,$t0,lsl#31
	eor	$Tlo,$Tlo,$t0,lsr#8
	eor	$Thi,$Thi,$t1,lsr#8
	eor	$Tlo,$Tlo,$t1,lsl#24
	eor	$Thi,$Thi,$t0,lsl#24
	eor	$Tlo,$Tlo,$t0,lsr#7
	eor	$Thi,$Thi,$t1,lsr#7
	eor	$Tlo,$Tlo,$t1,lsl#25

	@ sigma1(x)	(ROTR((x),19) ^ ROTR((x),61) ^ ((x)>>6))
	@ LO		lo>>19^hi<<13 ^ hi>>29^lo<<3 ^ lo>>6^hi<<26
	@ HI		hi>>19^lo<<13 ^ lo>>29^hi<<3 ^ hi>>6
	mov	$t0,$t2,lsr#19
	mov	$t1,$t3,lsr#19
	eor	$t0,$t0,$t3,lsl#13
	eor	$t1,$t1,$t2,lsl#13
	eor	$t0,$t0,$t3,lsr#29
	eor	$t1,$t1,$t2,lsr#29
	eor	$t0,$t0,$t2,lsl#3
	eor	$t1,$t1,$t3,lsl#3
	eor	$t0,$t0,$t2,lsr#6
	eor	$t1,$t1,$t3,lsr#6
	ldr	$t2,[sp,#`$Xoff+8*(16-9)`+0]
	eor	$t0,$t0,$t3,lsl#26

	ldr	$t3,[sp,#`$Xoff+8*(16-9)`+4]
	adds	$Tlo,$Tlo,$t0
	ldr	$t0,[sp,#`$Xoff+8*16`+0]
	adc	$Thi,$Thi,$t1

	ldr	$t1,[sp,#`$Xoff+8*16`+4]
	adds	$Tlo,$Tlo,$t2
	adc	$Thi,$Thi,$t3
	adds	$Tlo,$Tlo,$t0
	adc	$Thi,$Thi,$t1
___
	&BODY_00_15(0x17);
$code.=<<___;
#if __ARM_ARCH__>=7
	ittt	eq			@ Thumb2 thing, sanity check in ARM
#endif
	ldreq	$t0,[sp,#`$Xoff+8*(16-1)`+0]
	ldreq	$t1,[sp,#`$Xoff+8*(16-1)`+4]
	beq	.L16_79
	bic	$Ktbl,$Ktbl,#1

	ldr	$Tlo,[sp,#$Boff+0]
	ldr	$Thi,[sp,#$Boff+4]
	ldr	$t0, [$ctx,#$Aoff+$lo]
	ldr	$t1, [$ctx,#$Aoff+$hi]
	ldr	$t2, [$ctx,#$Boff+$lo]
	ldr	$t3, [$ctx,#$Boff+$hi]
	adds	$t0,$Alo,$t0
	str	$t0, [$ctx,#$Aoff+$lo]
	adc	$t1,$Ahi,$t1
	str	$t1, [$ctx,#$Aoff+$hi]
	adds	$t2,$Tlo,$t2
	str	$t2, [$ctx,#$Boff+$lo]
	adc	$t3,$Thi,$t3
	str	$t3, [$ctx,#$Boff+$hi]

	ldr	$Alo,[sp,#$Coff+0]
	ldr	$Ahi,[sp,#$Coff+4]
	ldr	$Tlo,[sp,#$Doff+0]
	ldr	$Thi,[sp,#$Doff+4]
	ldr	$t0, [$ctx,#$Coff+$lo]
	ldr	$t1, [$ctx,#$Coff+$hi]
	ldr	$t2, [$ctx,#$Doff+$lo]
	ldr	$t3, [$ctx,#$Doff+$hi]
	adds	$t0,$Alo,$t0
	str	$t0, [$ctx,#$Coff+$lo]
	adc	$t1,$Ahi,$t1
	str	$t1, [$ctx,#$Coff+$hi]
	adds	$t2,$Tlo,$t2
	str	$t2, [$ctx,#$Doff+$lo]
	adc	$t3,$Thi,$t3
	str	$t3, [$ctx,#$Doff+$hi]

	ldr	$Tlo,[sp,#$Foff+0]
	ldr	$Thi,[sp,#$Foff+4]
	ldr	$t0, [$ctx,#$Eoff+$lo]
	ldr	$t1, [$ctx,#$Eoff+$hi]
	ldr	$t2, [$ctx,#$Foff+$lo]
	ldr	$t3, [$ctx,#$Foff+$hi]
	adds	$Elo,$Elo,$t0
	str	$Elo,[$ctx,#$Eoff+$lo]
	adc	$Ehi,$Ehi,$t1
	str	$Ehi,[$ctx,#$Eoff+$hi]
	adds	$t2,$Tlo,$t2
	str	$t2, [$ctx,#$Foff+$lo]
	adc	$t3,$Thi,$t3
	str	$t3, [$ctx,#$Foff+$hi]

	ldr	$Alo,[sp,#$Goff+0]
	ldr	$Ahi,[sp,#$Goff+4]
	ldr	$Tlo,[sp,#$Hoff+0]
	ldr	$Thi,[sp,#$Hoff+4]
	ldr	$t0, [$ctx,#$Goff+$lo]
	ldr	$t1, [$ctx,#$Goff+$hi]
	ldr	$t2, [$ctx,#$Hoff+$lo]
	ldr	$t3, [$ctx,#$Hoff+$hi]
	adds	$t0,$Alo,$t0
	str	$t0, [$ctx,#$Goff+$lo]
	adc	$t1,$Ahi,$t1
	str	$t1, [$ctx,#$Goff+$hi]
	adds	$t2,$Tlo,$t2
	str	$t2, [$ctx,#$Hoff+$lo]
	adc	$t3,$Thi,$t3
	str	$t3, [$ctx,#$Hoff+$hi]

	add	sp,sp,#640
	sub	$Ktbl,$Ktbl,#640

	teq	$inp,$len
	bne	.Loop

	add	sp,sp,#8*9		@ destroy frame
#if __ARM_ARCH__>=5
	ldmia	sp!,{r4-r12,pc}
#else
	ldmia	sp!,{r4-r12,lr}
	tst	lr,#1
	moveq	pc,lr			@ be binary compatible with V4, yet
	bx	lr			@ interoperable with Thumb ISA:-)
#endif
.size	sha512_block_data_order,.-sha512_block_data_order
___

{
my @Sigma0=(28,34,39);
my @Sigma1=(14,18,41);
my @sigma0=(1, 8, 7);
my @sigma1=(19,61,6);

my $Ktbl="r3";
my $cnt="r12";	# volatile register known as ip, intra-procedure-call scratch

my @X=map("d$_",(0..15));
my @V=($A,$B,$C,$D,$E,$F,$G,$H)=map("d$_",(16..23));

sub NEON_00_15() {
my $i=shift;
my ($a,$b,$c,$d,$e,$f,$g,$h)=@_;
my ($t0,$t1,$t2,$T1,$K,$Ch,$Maj)=map("d$_",(24..31));	# temps

$code.=<<___ if ($i<16 || $i&1);
	vshr.u64	$t0,$e,#@Sigma1[0]	@ $i
#if $i<16
	vld1.64		{@X[$i%16]},[$inp]!	@ handles unaligned
#endif
	vshr.u64	$t1,$e,#@Sigma1[1]
#if $i>0
	 vadd.i64	$a,$Maj			@ h+=Maj from the past
#endif
	vshr.u64	$t2,$e,#@Sigma1[2]
___
$code.=<<___;
	vld1.64		{$K},[$Ktbl,:64]!	@ K[i++]
	vsli.64		$t0,$e,#`64-@Sigma1[0]`
	vsli.64		$t1,$e,#`64-@Sigma1[1]`
	vmov		$Ch,$e
	vsli.64		$t2,$e,#`64-@Sigma1[2]`
#if $i<16 && defined(__ARMEL__)
	vrev64.8	@X[$i],@X[$i]
#endif
	veor		$t1,$t0
	vbsl		$Ch,$f,$g		@ Ch(e,f,g)
	vshr.u64	$t0,$a,#@Sigma0[0]
	veor		$t2,$t1			@ Sigma1(e)
	vadd.i64	$T1,$Ch,$h
	vshr.u64	$t1,$a,#@Sigma0[1]
	vsli.64		$t0,$a,#`64-@Sigma0[0]`
	vadd.i64	$T1,$t2
	vshr.u64	$t2,$a,#@Sigma0[2]
	vadd.i64	$K,@X[$i%16]
	vsli.64		$t1,$a,#`64-@Sigma0[1]`
	veor		$Maj,$a,$b
	vsli.64		$t2,$a,#`64-@Sigma0[2]`
	veor		$h,$t0,$t1
	vadd.i64	$T1,$K
	vbsl		$Maj,$c,$b		@ Maj(a,b,c)
	veor		$h,$t2			@ Sigma0(a)
	vadd.i64	$d,$T1
	vadd.i64	$Maj,$T1
	@ vadd.i64	$h,$Maj
___
}

sub NEON_16_79() {
my $i=shift;

if ($i&1)	{ &NEON_00_15($i,@_); return; }

# 2x-vectorized, therefore runs every 2nd round
my @X=map("q$_",(0..7));			# view @X as 128-bit vector
my ($t0,$t1,$s0,$s1) = map("q$_",(12..15));	# temps
my ($d0,$d1,$d2) = map("d$_",(24..26));		# temps from NEON_00_15
my $e=@_[4];					# $e from NEON_00_15
$i /= 2;
$code.=<<___;
	vshr.u64	$t0,@X[($i+7)%8],#@sigma1[0]
	vshr.u64	$t1,@X[($i+7)%8],#@sigma1[1]
	 vadd.i64	@_[0],d30			@ h+=Maj from the past
	vshr.u64	$s1,@X[($i+7)%8],#@sigma1[2]
	vsli.64		$t0,@X[($i+7)%8],#`64-@sigma1[0]`
	vext.8		$s0,@X[$i%8],@X[($i+1)%8],#8	@ X[i+1]
	vsli.64		$t1,@X[($i+7)%8],#`64-@sigma1[1]`
	veor		$s1,$t0
	vshr.u64	$t0,$s0,#@sigma0[0]
	veor		$s1,$t1				@ sigma1(X[i+14])
	vshr.u64	$t1,$s0,#@sigma0[1]
	vadd.i64	@X[$i%8],$s1
	vshr.u64	$s1,$s0,#@sigma0[2]
	vsli.64		$t0,$s0,#`64-@sigma0[0]`
	vsli.64		$t1,$s0,#`64-@sigma0[1]`
	vext.8		$s0,@X[($i+4)%8],@X[($i+5)%8],#8	@ X[i+9]
	veor		$s1,$t0
	vshr.u64	$d0,$e,#@Sigma1[0]		@ from NEON_00_15
	vadd.i64	@X[$i%8],$s0
	vshr.u64	$d1,$e,#@Sigma1[1]		@ from NEON_00_15
	veor		$s1,$t1				@ sigma0(X[i+1])
	vshr.u64	$d2,$e,#@Sigma1[2]		@ from NEON_00_15
	vadd.i64	@X[$i%8],$s1
___
	&NEON_00_15(2*$i,@_);
}

$code.=<<___;
#if __ARM_MAX_ARCH__>=7
.arch	armv7-a
.fpu	neon

.global	sha512_block_data_order_neon
.type	sha512_block_data_order_neon,%function
.align	4
sha512_block_data_order_neon:
.LNEON:
	dmb				@ errata #451034 on early Cortex A8
	add	$len,$inp,$len,lsl#7	@ len to point at the end of inp
	VFP_ABI_PUSH
	adrl	$Ktbl,K512
	vldmia	$ctx,{$A-$H}		@ load context
.Loop_neon:
___
for($i=0;$i<16;$i++)	{ &NEON_00_15($i,@V); unshift(@V,pop(@V)); }
$code.=<<___;
	mov		$cnt,#4
.L16_79_neon:
	subs		$cnt,#1
___
for(;$i<32;$i++)	{ &NEON_16_79($i,@V); unshift(@V,pop(@V)); }
$code.=<<___;
	bne		.L16_79_neon

	 vadd.i64	$A,d30		@ h+=Maj from the past
	vldmia		$ctx,{d24-d31}	@ load context to temp
	vadd.i64	q8,q12		@ vectorized accumulate
	vadd.i64	q9,q13
	vadd.i64	q10,q14
	vadd.i64	q11,q15
	vstmia		$ctx,{$A-$H}	@ save context
	teq		$inp,$len
	sub		$Ktbl,#640	@ rewind K512
	bne		.Loop_neon

	VFP_ABI_POP
	ret				@ bx lr
.size	sha512_block_data_order_neon,.-sha512_block_data_order_neon
#endif
___
}
$code.=<<___;
.asciz	"SHA512 block transform for ARMv4/NEON, CRYPTOGAMS by <appro\@openssl.org>"
.align	2
#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
.comm	OPENSSL_armcap_P,4,4
#endif
___

$code =~ s/\`([^\`]*)\`/eval $1/gem;
$code =~ s/\bbx\s+lr\b/.word\t0xe12fff1e/gm;	# make it possible to compile with -march=armv4
$code =~ s/\bret\b/bx	lr/gm;

open SELF,$0;
while(<SELF>) {
	next if (/^#!/);
	last if (!s/^#/@/ and !/^$/);
	print;
}
close SELF;

print $code;
close STDOUT; # enforce flush