aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/crypto/poly1305-sse2-x86_64.S
blob: 338c748054ed2fefeb88935e1ed849e2445d2aba (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
/*
 * Poly1305 authenticator algorithm, RFC7539, x64 SSE2 functions
 *
 * Copyright (C) 2015 Martin Willi
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/linkage.h>

.data
.align 16

ANMASK:	.octa 0x0000000003ffffff0000000003ffffff
ORMASK:	.octa 0x00000000010000000000000001000000

.text

#define h0 0x00(%rdi)
#define h1 0x04(%rdi)
#define h2 0x08(%rdi)
#define h3 0x0c(%rdi)
#define h4 0x10(%rdi)
#define r0 0x00(%rdx)
#define r1 0x04(%rdx)
#define r2 0x08(%rdx)
#define r3 0x0c(%rdx)
#define r4 0x10(%rdx)
#define s1 0x00(%rsp)
#define s2 0x04(%rsp)
#define s3 0x08(%rsp)
#define s4 0x0c(%rsp)
#define m %rsi
#define h01 %xmm0
#define h23 %xmm1
#define h44 %xmm2
#define t1 %xmm3
#define t2 %xmm4
#define t3 %xmm5
#define t4 %xmm6
#define mask %xmm7
#define d0 %r8
#define d1 %r9
#define d2 %r10
#define d3 %r11
#define d4 %r12

ENTRY(poly1305_block_sse2)
	# %rdi: Accumulator h[5]
	# %rsi: 16 byte input block m
	# %rdx: Poly1305 key r[5]
	# %rcx: Block count

	# This single block variant tries to improve performance by doing two
	# multiplications in parallel using SSE instructions. There is quite
	# some quardword packing involved, hence the speedup is marginal.

	push		%rbx
	push		%r12
	sub		$0x10,%rsp

	# s1..s4 = r1..r4 * 5
	mov		r1,%eax
	lea		(%eax,%eax,4),%eax
	mov		%eax,s1
	mov		r2,%eax
	lea		(%eax,%eax,4),%eax
	mov		%eax,s2
	mov		r3,%eax
	lea		(%eax,%eax,4),%eax
	mov		%eax,s3
	mov		r4,%eax
	lea		(%eax,%eax,4),%eax
	mov		%eax,s4

	movdqa		ANMASK(%rip),mask

.Ldoblock:
	# h01 = [0, h1, 0, h0]
	# h23 = [0, h3, 0, h2]
	# h44 = [0, h4, 0, h4]
	movd		h0,h01
	movd		h1,t1
	movd		h2,h23
	movd		h3,t2
	movd		h4,h44
	punpcklqdq	t1,h01
	punpcklqdq	t2,h23
	punpcklqdq	h44,h44

	# h01 += [ (m[3-6] >> 2) & 0x3ffffff, m[0-3] & 0x3ffffff ]
	movd		0x00(m),t1
	movd		0x03(m),t2
	psrld		$2,t2
	punpcklqdq	t2,t1
	pand		mask,t1
	paddd		t1,h01
	# h23 += [ (m[9-12] >> 6) & 0x3ffffff, (m[6-9] >> 4) & 0x3ffffff ]
	movd		0x06(m),t1
	movd		0x09(m),t2
	psrld		$4,t1
	psrld		$6,t2
	punpcklqdq	t2,t1
	pand		mask,t1
	paddd		t1,h23
	# h44 += [ (m[12-15] >> 8) | (1 << 24), (m[12-15] >> 8) | (1 << 24) ]
	mov		0x0c(m),%eax
	shr		$8,%eax
	or		$0x01000000,%eax
	movd		%eax,t1
	pshufd		$0xc4,t1,t1
	paddd		t1,h44

	# t1[0] = h0 * r0 + h2 * s3
	# t1[1] = h1 * s4 + h3 * s2
	movd		r0,t1
	movd		s4,t2
	punpcklqdq	t2,t1
	pmuludq		h01,t1
	movd		s3,t2
	movd		s2,t3
	punpcklqdq	t3,t2
	pmuludq		h23,t2
	paddq		t2,t1
	# t2[0] = h0 * r1 + h2 * s4
	# t2[1] = h1 * r0 + h3 * s3
	movd		r1,t2
	movd		r0,t3
	punpcklqdq	t3,t2
	pmuludq		h01,t2
	movd		s4,t3
	movd		s3,t4
	punpcklqdq	t4,t3
	pmuludq		h23,t3
	paddq		t3,t2
	# t3[0] = h4 * s1
	# t3[1] = h4 * s2
	movd		s1,t3
	movd		s2,t4
	punpcklqdq	t4,t3
	pmuludq		h44,t3
	# d0 = t1[0] + t1[1] + t3[0]
	# d1 = t2[0] + t2[1] + t3[1]
	movdqa		t1,t4
	punpcklqdq	t2,t4
	punpckhqdq	t2,t1
	paddq		t4,t1
	paddq		t3,t1
	movq		t1,d0
	psrldq		$8,t1
	movq		t1,d1

	# t1[0] = h0 * r2 + h2 * r0
	# t1[1] = h1 * r1 + h3 * s4
	movd		r2,t1
	movd		r1,t2
	punpcklqdq 	t2,t1
	pmuludq		h01,t1
	movd		r0,t2
	movd		s4,t3
	punpcklqdq	t3,t2
	pmuludq		h23,t2
	paddq		t2,t1
	# t2[0] = h0 * r3 + h2 * r1
	# t2[1] = h1 * r2 + h3 * r0
	movd		r3,t2
	movd		r2,t3
	punpcklqdq	t3,t2
	pmuludq		h01,t2
	movd		r1,t3
	movd		r0,t4
	punpcklqdq	t4,t3
	pmuludq		h23,t3
	paddq		t3,t2
	# t3[0] = h4 * s3
	# t3[1] = h4 * s4
	movd		s3,t3
	movd		s4,t4
	punpcklqdq	t4,t3
	pmuludq		h44,t3
	# d2 = t1[0] + t1[1] + t3[0]
	# d3 = t2[0] + t2[1] + t3[1]
	movdqa		t1,t4
	punpcklqdq	t2,t4
	punpckhqdq	t2,t1
	paddq		t4,t1
	paddq		t3,t1
	movq		t1,d2
	psrldq		$8,t1
	movq		t1,d3

	# t1[0] = h0 * r4 + h2 * r2
	# t1[1] = h1 * r3 + h3 * r1
	movd		r4,t1
	movd		r3,t2
	punpcklqdq	t2,t1
	pmuludq		h01,t1
	movd		r2,t2
	movd		r1,t3
	punpcklqdq	t3,t2
	pmuludq		h23,t2
	paddq		t2,t1
	# t3[0] = h4 * r0
	movd		r0,t3
	pmuludq		h44,t3
	# d4 = t1[0] + t1[1] + t3[0]
	movdqa		t1,t4
	psrldq		$8,t4
	paddq		t4,t1
	paddq		t3,t1
	movq		t1,d4

	# d1 += d0 >> 26
	mov		d0,%rax
	shr		$26,%rax
	add		%rax,d1
	# h0 = d0 & 0x3ffffff
	mov		d0,%rbx
	and		$0x3ffffff,%ebx

	# d2 += d1 >> 26
	mov		d1,%rax
	shr		$26,%rax
	add		%rax,d2
	# h1 = d1 & 0x3ffffff
	mov		d1,%rax
	and		$0x3ffffff,%eax
	mov		%eax,h1

	# d3 += d2 >> 26
	mov		d2,%rax
	shr		$26,%rax
	add		%rax,d3
	# h2 = d2 & 0x3ffffff
	mov		d2,%rax
	and		$0x3ffffff,%eax
	mov		%eax,h2

	# d4 += d3 >> 26
	mov		d3,%rax
	shr		$26,%rax
	add		%rax,d4
	# h3 = d3 & 0x3ffffff
	mov		d3,%rax
	and		$0x3ffffff,%eax
	mov		%eax,h3

	# h0 += (d4 >> 26) * 5
	mov		d4,%rax
	shr		$26,%rax
	lea		(%eax,%eax,4),%eax
	add		%eax,%ebx
	# h4 = d4 & 0x3ffffff
	mov		d4,%rax
	and		$0x3ffffff,%eax
	mov		%eax,h4

	# h1 += h0 >> 26
	mov		%ebx,%eax
	shr		$26,%eax
	add		%eax,h1
	# h0 = h0 & 0x3ffffff
	andl		$0x3ffffff,%ebx
	mov		%ebx,h0

	add		$0x10,m
	dec		%rcx
	jnz		.Ldoblock

	add		$0x10,%rsp
	pop		%r12
	pop		%rbx
	ret
ENDPROC(poly1305_block_sse2)


#define u0 0x00(%r8)
#define u1 0x04(%r8)
#define u2 0x08(%r8)
#define u3 0x0c(%r8)
#define u4 0x10(%r8)
#define hc0 %xmm0
#define hc1 %xmm1
#define hc2 %xmm2
#define hc3 %xmm5
#define hc4 %xmm6
#define ru0 %xmm7
#define ru1 %xmm8
#define ru2 %xmm9
#define ru3 %xmm10
#define ru4 %xmm11
#define sv1 %xmm12
#define sv2 %xmm13
#define sv3 %xmm14
#define sv4 %xmm15
#undef d0
#define d0 %r13

ENTRY(poly1305_2block_sse2)
	# %rdi: Accumulator h[5]
	# %rsi: 16 byte input block m
	# %rdx: Poly1305 key r[5]
	# %rcx: Doubleblock count
	# %r8:  Poly1305 derived key r^2 u[5]

	# This two-block variant further improves performance by using loop
	# unrolled block processing. This is more straight forward and does
	# less byte shuffling, but requires a second Poly1305 key r^2:
	# h = (h + m) * r    =>    h = (h + m1) * r^2 + m2 * r

	push		%rbx
	push		%r12
	push		%r13

	# combine r0,u0
	movd		u0,ru0
	movd		r0,t1
	punpcklqdq	t1,ru0

	# combine r1,u1 and s1=r1*5,v1=u1*5
	movd		u1,ru1
	movd		r1,t1
	punpcklqdq	t1,ru1
	movdqa		ru1,sv1
	pslld		$2,sv1
	paddd		ru1,sv1

	# combine r2,u2 and s2=r2*5,v2=u2*5
	movd		u2,ru2
	movd		r2,t1
	punpcklqdq	t1,ru2
	movdqa		ru2,sv2
	pslld		$2,sv2
	paddd		ru2,sv2

	# combine r3,u3 and s3=r3*5,v3=u3*5
	movd		u3,ru3
	movd		r3,t1
	punpcklqdq	t1,ru3
	movdqa		ru3,sv3
	pslld		$2,sv3
	paddd		ru3,sv3

	# combine r4,u4 and s4=r4*5,v4=u4*5
	movd		u4,ru4
	movd		r4,t1
	punpcklqdq	t1,ru4
	movdqa		ru4,sv4
	pslld		$2,sv4
	paddd		ru4,sv4

.Ldoblock2:
	# hc0 = [ m[16-19] & 0x3ffffff, h0 + m[0-3] & 0x3ffffff ]
	movd		0x00(m),hc0
	movd		0x10(m),t1
	punpcklqdq	t1,hc0
	pand		ANMASK(%rip),hc0
	movd		h0,t1
	paddd		t1,hc0
	# hc1 = [ (m[19-22] >> 2) & 0x3ffffff, h1 + (m[3-6] >> 2) & 0x3ffffff ]
	movd		0x03(m),hc1
	movd		0x13(m),t1
	punpcklqdq	t1,hc1
	psrld		$2,hc1
	pand		ANMASK(%rip),hc1
	movd		h1,t1
	paddd		t1,hc1
	# hc2 = [ (m[22-25] >> 4) & 0x3ffffff, h2 + (m[6-9] >> 4) & 0x3ffffff ]
	movd		0x06(m),hc2
	movd		0x16(m),t1
	punpcklqdq	t1,hc2
	psrld		$4,hc2
	pand		ANMASK(%rip),hc2
	movd		h2,t1
	paddd		t1,hc2
	# hc3 = [ (m[25-28] >> 6) & 0x3ffffff, h3 + (m[9-12] >> 6) & 0x3ffffff ]
	movd		0x09(m),hc3
	movd		0x19(m),t1
	punpcklqdq	t1,hc3
	psrld		$6,hc3
	pand		ANMASK(%rip),hc3
	movd		h3,t1
	paddd		t1,hc3
	# hc4 = [ (m[28-31] >> 8) | (1<<24), h4 + (m[12-15] >> 8) | (1<<24) ]
	movd		0x0c(m),hc4
	movd		0x1c(m),t1
	punpcklqdq	t1,hc4
	psrld		$8,hc4
	por		ORMASK(%rip),hc4
	movd		h4,t1
	paddd		t1,hc4

	# t1 = [ hc0[1] * r0, hc0[0] * u0 ]
	movdqa		ru0,t1
	pmuludq		hc0,t1
	# t1 += [ hc1[1] * s4, hc1[0] * v4 ]
	movdqa		sv4,t2
	pmuludq		hc1,t2
	paddq		t2,t1
	# t1 += [ hc2[1] * s3, hc2[0] * v3 ]
	movdqa		sv3,t2
	pmuludq		hc2,t2
	paddq		t2,t1
	# t1 += [ hc3[1] * s2, hc3[0] * v2 ]
	movdqa		sv2,t2
	pmuludq		hc3,t2
	paddq		t2,t1
	# t1 += [ hc4[1] * s1, hc4[0] * v1 ]
	movdqa		sv1,t2
	pmuludq		hc4,t2
	paddq		t2,t1
	# d0 = t1[0] + t1[1]
	movdqa		t1,t2
	psrldq		$8,t2
	paddq		t2,t1
	movq		t1,d0

	# t1 = [ hc0[1] * r1, hc0[0] * u1 ]
	movdqa		ru1,t1
	pmuludq		hc0,t1
	# t1 += [ hc1[1] * r0, hc1[0] * u0 ]
	movdqa		ru0,t2
	pmuludq		hc1,t2
	paddq		t2,t1
	# t1 += [ hc2[1] * s4, hc2[0] * v4 ]
	movdqa		sv4,t2
	pmuludq		hc2,t2
	paddq		t2,t1
	# t1 += [ hc3[1] * s3, hc3[0] * v3 ]
	movdqa		sv3,t2
	pmuludq		hc3,t2
	paddq		t2,t1
	# t1 += [ hc4[1] * s2, hc4[0] * v2 ]
	movdqa		sv2,t2
	pmuludq		hc4,t2
	paddq		t2,t1
	# d1 = t1[0] + t1[1]
	movdqa		t1,t2
	psrldq		$8,t2
	paddq		t2,t1
	movq		t1,d1

	# t1 = [ hc0[1] * r2, hc0[0] * u2 ]
	movdqa		ru2,t1
	pmuludq		hc0,t1
	# t1 += [ hc1[1] * r1, hc1[0] * u1 ]
	movdqa		ru1,t2
	pmuludq		hc1,t2
	paddq		t2,t1
	# t1 += [ hc2[1] * r0, hc2[0] * u0 ]
	movdqa		ru0,t2
	pmuludq		hc2,t2
	paddq		t2,t1
	# t1 += [ hc3[1] * s4, hc3[0] * v4 ]
	movdqa		sv4,t2
	pmuludq		hc3,t2
	paddq		t2,t1
	# t1 += [ hc4[1] * s3, hc4[0] * v3 ]
	movdqa		sv3,t2
	pmuludq		hc4,t2
	paddq		t2,t1
	# d2 = t1[0] + t1[1]
	movdqa		t1,t2
	psrldq		$8,t2
	paddq		t2,t1
	movq		t1,d2

	# t1 = [ hc0[1] * r3, hc0[0] * u3 ]
	movdqa		ru3,t1
	pmuludq		hc0,t1
	# t1 += [ hc1[1] * r2, hc1[0] * u2 ]
	movdqa		ru2,t2
	pmuludq		hc1,t2
	paddq		t2,t1
	# t1 += [ hc2[1] * r1, hc2[0] * u1 ]
	movdqa		ru1,t2
	pmuludq		hc2,t2
	paddq		t2,t1
	# t1 += [ hc3[1] * r0, hc3[0] * u0 ]
	movdqa		ru0,t2
	pmuludq		hc3,t2
	paddq		t2,t1
	# t1 += [ hc4[1] * s4, hc4[0] * v4 ]
	movdqa		sv4,t2
	pmuludq		hc4,t2
	paddq		t2,t1
	# d3 = t1[0] + t1[1]
	movdqa		t1,t2
	psrldq		$8,t2
	paddq		t2,t1
	movq		t1,d3

	# t1 = [ hc0[1] * r4, hc0[0] * u4 ]
	movdqa		ru4,t1
	pmuludq		hc0,t1
	# t1 += [ hc1[1] * r3, hc1[0] * u3 ]
	movdqa		ru3,t2
	pmuludq		hc1,t2
	paddq		t2,t1
	# t1 += [ hc2[1] * r2, hc2[0] * u2 ]
	movdqa		ru2,t2
	pmuludq		hc2,t2
	paddq		t2,t1
	# t1 += [ hc3[1] * r1, hc3[0] * u1 ]
	movdqa		ru1,t2
	pmuludq		hc3,t2
	paddq		t2,t1
	# t1 += [ hc4[1] * r0, hc4[0] * u0 ]
	movdqa		ru0,t2
	pmuludq		hc4,t2
	paddq		t2,t1
	# d4 = t1[0] + t1[1]
	movdqa		t1,t2
	psrldq		$8,t2
	paddq		t2,t1
	movq		t1,d4

	# d1 += d0 >> 26
	mov		d0,%rax
	shr		$26,%rax
	add		%rax,d1
	# h0 = d0 & 0x3ffffff
	mov		d0,%rbx
	and		$0x3ffffff,%ebx

	# d2 += d1 >> 26
	mov		d1,%rax
	shr		$26,%rax
	add		%rax,d2
	# h1 = d1 & 0x3ffffff
	mov		d1,%rax
	and		$0x3ffffff,%eax
	mov		%eax,h1

	# d3 += d2 >> 26
	mov		d2,%rax
	shr		$26,%rax
	add		%rax,d3
	# h2 = d2 & 0x3ffffff
	mov		d2,%rax
	and		$0x3ffffff,%eax
	mov		%eax,h2

	# d4 += d3 >> 26
	mov		d3,%rax
	shr		$26,%rax
	add		%rax,d4
	# h3 = d3 & 0x3ffffff
	mov		d3,%rax
	and		$0x3ffffff,%eax
	mov		%eax,h3

	# h0 += (d4 >> 26) * 5
	mov		d4,%rax
	shr		$26,%rax
	lea		(%eax,%eax,4),%eax
	add		%eax,%ebx
	# h4 = d4 & 0x3ffffff
	mov		d4,%rax
	and		$0x3ffffff,%eax
	mov		%eax,h4

	# h1 += h0 >> 26
	mov		%ebx,%eax
	shr		$26,%eax
	add		%eax,h1
	# h0 = h0 & 0x3ffffff
	andl		$0x3ffffff,%ebx
	mov		%ebx,h0

	add		$0x20,m
	dec		%rcx
	jnz		.Ldoblock2

	pop		%r13
	pop		%r12
	pop		%rbx
	ret
ENDPROC(poly1305_2block_sse2)