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1 | #!/usr/bin/env perl |
2 | # SPDX-License-Identifier: GPL-1.0+ OR BSD-3-Clause | |
3 | # | |
4 | # ==================================================================== | |
5 | # Written by Andy Polyakov, @dot-asm, initially for the OpenSSL | |
6 | # project. | |
7 | # ==================================================================== | |
8 | # | |
9 | # This module implements Poly1305 hash for ARMv8. | |
10 | # | |
11 | # June 2015 | |
12 | # | |
13 | # Numbers are cycles per processed byte with poly1305_blocks alone. | |
14 | # | |
15 | # IALU/gcc-4.9 NEON | |
16 | # | |
17 | # Apple A7 1.86/+5% 0.72 | |
18 | # Cortex-A53 2.69/+58% 1.47 | |
19 | # Cortex-A57 2.70/+7% 1.14 | |
20 | # Denver 1.64/+50% 1.18(*) | |
21 | # X-Gene 2.13/+68% 2.27 | |
22 | # Mongoose 1.77/+75% 1.12 | |
23 | # Kryo 2.70/+55% 1.13 | |
24 | # ThunderX2 1.17/+95% 1.36 | |
25 | # | |
26 | # (*) estimate based on resources availability is less than 1.0, | |
27 | # i.e. measured result is worse than expected, presumably binary | |
28 | # translator is not almighty; | |
29 | ||
30 | $flavour=shift; | |
31 | $output=shift; | |
32 | ||
33 | if ($flavour && $flavour ne "void") { | |
34 | $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; | |
35 | ( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or | |
36 | ( $xlate="${dir}../../perlasm/arm-xlate.pl" and -f $xlate) or | |
37 | die "can't locate arm-xlate.pl"; | |
38 | ||
39 | open STDOUT,"| \"$^X\" $xlate $flavour $output"; | |
40 | } else { | |
41 | open STDOUT,">$output"; | |
42 | } | |
43 | ||
44 | my ($ctx,$inp,$len,$padbit) = map("x$_",(0..3)); | |
45 | my ($mac,$nonce)=($inp,$len); | |
46 | ||
47 | my ($h0,$h1,$h2,$r0,$r1,$s1,$t0,$t1,$d0,$d1,$d2) = map("x$_",(4..14)); | |
48 | ||
49 | $code.=<<___; | |
50 | #ifndef __KERNEL__ | |
51 | # include "arm_arch.h" | |
52 | .extern OPENSSL_armcap_P | |
53 | #endif | |
54 | ||
55 | .text | |
56 | ||
57 | // forward "declarations" are required for Apple | |
58 | .globl poly1305_blocks | |
59 | .globl poly1305_emit | |
60 | ||
61 | .globl poly1305_init | |
62 | .type poly1305_init,%function | |
63 | .align 5 | |
64 | poly1305_init: | |
65 | cmp $inp,xzr | |
66 | stp xzr,xzr,[$ctx] // zero hash value | |
67 | stp xzr,xzr,[$ctx,#16] // [along with is_base2_26] | |
68 | ||
69 | csel x0,xzr,x0,eq | |
70 | b.eq .Lno_key | |
71 | ||
72 | #ifndef __KERNEL__ | |
73 | adrp x17,OPENSSL_armcap_P | |
74 | ldr w17,[x17,#:lo12:OPENSSL_armcap_P] | |
75 | #endif | |
76 | ||
77 | ldp $r0,$r1,[$inp] // load key | |
78 | mov $s1,#0xfffffffc0fffffff | |
79 | movk $s1,#0x0fff,lsl#48 | |
80 | #ifdef __AARCH64EB__ | |
81 | rev $r0,$r0 // flip bytes | |
82 | rev $r1,$r1 | |
83 | #endif | |
84 | and $r0,$r0,$s1 // &=0ffffffc0fffffff | |
85 | and $s1,$s1,#-4 | |
86 | and $r1,$r1,$s1 // &=0ffffffc0ffffffc | |
87 | mov w#$s1,#-1 | |
88 | stp $r0,$r1,[$ctx,#32] // save key value | |
89 | str w#$s1,[$ctx,#48] // impossible key power value | |
90 | ||
91 | #ifndef __KERNEL__ | |
92 | tst w17,#ARMV7_NEON | |
93 | ||
94 | adr $d0,.Lpoly1305_blocks | |
95 | adr $r0,.Lpoly1305_blocks_neon | |
96 | adr $d1,.Lpoly1305_emit | |
97 | ||
98 | csel $d0,$d0,$r0,eq | |
99 | ||
100 | # ifdef __ILP32__ | |
101 | stp w#$d0,w#$d1,[$len] | |
102 | # else | |
103 | stp $d0,$d1,[$len] | |
104 | # endif | |
105 | #endif | |
106 | mov x0,#1 | |
107 | .Lno_key: | |
108 | ret | |
109 | .size poly1305_init,.-poly1305_init | |
110 | ||
111 | .type poly1305_blocks,%function | |
112 | .align 5 | |
113 | poly1305_blocks: | |
114 | .Lpoly1305_blocks: | |
115 | ands $len,$len,#-16 | |
116 | b.eq .Lno_data | |
117 | ||
118 | ldp $h0,$h1,[$ctx] // load hash value | |
119 | ldp $h2,x17,[$ctx,#16] // [along with is_base2_26] | |
120 | ldp $r0,$r1,[$ctx,#32] // load key value | |
121 | ||
122 | #ifdef __AARCH64EB__ | |
123 | lsr $d0,$h0,#32 | |
124 | mov w#$d1,w#$h0 | |
125 | lsr $d2,$h1,#32 | |
126 | mov w15,w#$h1 | |
127 | lsr x16,$h2,#32 | |
128 | #else | |
129 | mov w#$d0,w#$h0 | |
130 | lsr $d1,$h0,#32 | |
131 | mov w#$d2,w#$h1 | |
132 | lsr x15,$h1,#32 | |
133 | mov w16,w#$h2 | |
134 | #endif | |
135 | ||
136 | add $d0,$d0,$d1,lsl#26 // base 2^26 -> base 2^64 | |
137 | lsr $d1,$d2,#12 | |
138 | adds $d0,$d0,$d2,lsl#52 | |
139 | add $d1,$d1,x15,lsl#14 | |
140 | adc $d1,$d1,xzr | |
141 | lsr $d2,x16,#24 | |
142 | adds $d1,$d1,x16,lsl#40 | |
143 | adc $d2,$d2,xzr | |
144 | ||
145 | cmp x17,#0 // is_base2_26? | |
146 | add $s1,$r1,$r1,lsr#2 // s1 = r1 + (r1 >> 2) | |
147 | csel $h0,$h0,$d0,eq // choose between radixes | |
148 | csel $h1,$h1,$d1,eq | |
149 | csel $h2,$h2,$d2,eq | |
150 | ||
151 | .Loop: | |
152 | ldp $t0,$t1,[$inp],#16 // load input | |
153 | sub $len,$len,#16 | |
154 | #ifdef __AARCH64EB__ | |
155 | rev $t0,$t0 | |
156 | rev $t1,$t1 | |
157 | #endif | |
158 | adds $h0,$h0,$t0 // accumulate input | |
159 | adcs $h1,$h1,$t1 | |
160 | ||
161 | mul $d0,$h0,$r0 // h0*r0 | |
162 | adc $h2,$h2,$padbit | |
163 | umulh $d1,$h0,$r0 | |
164 | ||
165 | mul $t0,$h1,$s1 // h1*5*r1 | |
166 | umulh $t1,$h1,$s1 | |
167 | ||
168 | adds $d0,$d0,$t0 | |
169 | mul $t0,$h0,$r1 // h0*r1 | |
170 | adc $d1,$d1,$t1 | |
171 | umulh $d2,$h0,$r1 | |
172 | ||
173 | adds $d1,$d1,$t0 | |
174 | mul $t0,$h1,$r0 // h1*r0 | |
175 | adc $d2,$d2,xzr | |
176 | umulh $t1,$h1,$r0 | |
177 | ||
178 | adds $d1,$d1,$t0 | |
179 | mul $t0,$h2,$s1 // h2*5*r1 | |
180 | adc $d2,$d2,$t1 | |
181 | mul $t1,$h2,$r0 // h2*r0 | |
182 | ||
183 | adds $d1,$d1,$t0 | |
184 | adc $d2,$d2,$t1 | |
185 | ||
186 | and $t0,$d2,#-4 // final reduction | |
187 | and $h2,$d2,#3 | |
188 | add $t0,$t0,$d2,lsr#2 | |
189 | adds $h0,$d0,$t0 | |
190 | adcs $h1,$d1,xzr | |
191 | adc $h2,$h2,xzr | |
192 | ||
193 | cbnz $len,.Loop | |
194 | ||
195 | stp $h0,$h1,[$ctx] // store hash value | |
196 | stp $h2,xzr,[$ctx,#16] // [and clear is_base2_26] | |
197 | ||
198 | .Lno_data: | |
199 | ret | |
200 | .size poly1305_blocks,.-poly1305_blocks | |
201 | ||
202 | .type poly1305_emit,%function | |
203 | .align 5 | |
204 | poly1305_emit: | |
205 | .Lpoly1305_emit: | |
206 | ldp $h0,$h1,[$ctx] // load hash base 2^64 | |
207 | ldp $h2,$r0,[$ctx,#16] // [along with is_base2_26] | |
208 | ldp $t0,$t1,[$nonce] // load nonce | |
209 | ||
210 | #ifdef __AARCH64EB__ | |
211 | lsr $d0,$h0,#32 | |
212 | mov w#$d1,w#$h0 | |
213 | lsr $d2,$h1,#32 | |
214 | mov w15,w#$h1 | |
215 | lsr x16,$h2,#32 | |
216 | #else | |
217 | mov w#$d0,w#$h0 | |
218 | lsr $d1,$h0,#32 | |
219 | mov w#$d2,w#$h1 | |
220 | lsr x15,$h1,#32 | |
221 | mov w16,w#$h2 | |
222 | #endif | |
223 | ||
224 | add $d0,$d0,$d1,lsl#26 // base 2^26 -> base 2^64 | |
225 | lsr $d1,$d2,#12 | |
226 | adds $d0,$d0,$d2,lsl#52 | |
227 | add $d1,$d1,x15,lsl#14 | |
228 | adc $d1,$d1,xzr | |
229 | lsr $d2,x16,#24 | |
230 | adds $d1,$d1,x16,lsl#40 | |
231 | adc $d2,$d2,xzr | |
232 | ||
233 | cmp $r0,#0 // is_base2_26? | |
234 | csel $h0,$h0,$d0,eq // choose between radixes | |
235 | csel $h1,$h1,$d1,eq | |
236 | csel $h2,$h2,$d2,eq | |
237 | ||
238 | adds $d0,$h0,#5 // compare to modulus | |
239 | adcs $d1,$h1,xzr | |
240 | adc $d2,$h2,xzr | |
241 | ||
242 | tst $d2,#-4 // see if it's carried/borrowed | |
243 | ||
244 | csel $h0,$h0,$d0,eq | |
245 | csel $h1,$h1,$d1,eq | |
246 | ||
247 | #ifdef __AARCH64EB__ | |
248 | ror $t0,$t0,#32 // flip nonce words | |
249 | ror $t1,$t1,#32 | |
250 | #endif | |
251 | adds $h0,$h0,$t0 // accumulate nonce | |
252 | adc $h1,$h1,$t1 | |
253 | #ifdef __AARCH64EB__ | |
254 | rev $h0,$h0 // flip output bytes | |
255 | rev $h1,$h1 | |
256 | #endif | |
257 | stp $h0,$h1,[$mac] // write result | |
258 | ||
259 | ret | |
260 | .size poly1305_emit,.-poly1305_emit | |
261 | ___ | |
262 | my ($R0,$R1,$S1,$R2,$S2,$R3,$S3,$R4,$S4) = map("v$_.4s",(0..8)); | |
263 | my ($IN01_0,$IN01_1,$IN01_2,$IN01_3,$IN01_4) = map("v$_.2s",(9..13)); | |
264 | my ($IN23_0,$IN23_1,$IN23_2,$IN23_3,$IN23_4) = map("v$_.2s",(14..18)); | |
265 | my ($ACC0,$ACC1,$ACC2,$ACC3,$ACC4) = map("v$_.2d",(19..23)); | |
266 | my ($H0,$H1,$H2,$H3,$H4) = map("v$_.2s",(24..28)); | |
267 | my ($T0,$T1,$MASK) = map("v$_",(29..31)); | |
268 | ||
269 | my ($in2,$zeros)=("x16","x17"); | |
270 | my $is_base2_26 = $zeros; # borrow | |
271 | ||
272 | $code.=<<___; | |
273 | .type poly1305_mult,%function | |
274 | .align 5 | |
275 | poly1305_mult: | |
276 | mul $d0,$h0,$r0 // h0*r0 | |
277 | umulh $d1,$h0,$r0 | |
278 | ||
279 | mul $t0,$h1,$s1 // h1*5*r1 | |
280 | umulh $t1,$h1,$s1 | |
281 | ||
282 | adds $d0,$d0,$t0 | |
283 | mul $t0,$h0,$r1 // h0*r1 | |
284 | adc $d1,$d1,$t1 | |
285 | umulh $d2,$h0,$r1 | |
286 | ||
287 | adds $d1,$d1,$t0 | |
288 | mul $t0,$h1,$r0 // h1*r0 | |
289 | adc $d2,$d2,xzr | |
290 | umulh $t1,$h1,$r0 | |
291 | ||
292 | adds $d1,$d1,$t0 | |
293 | mul $t0,$h2,$s1 // h2*5*r1 | |
294 | adc $d2,$d2,$t1 | |
295 | mul $t1,$h2,$r0 // h2*r0 | |
296 | ||
297 | adds $d1,$d1,$t0 | |
298 | adc $d2,$d2,$t1 | |
299 | ||
300 | and $t0,$d2,#-4 // final reduction | |
301 | and $h2,$d2,#3 | |
302 | add $t0,$t0,$d2,lsr#2 | |
303 | adds $h0,$d0,$t0 | |
304 | adcs $h1,$d1,xzr | |
305 | adc $h2,$h2,xzr | |
306 | ||
307 | ret | |
308 | .size poly1305_mult,.-poly1305_mult | |
309 | ||
310 | .type poly1305_splat,%function | |
311 | .align 4 | |
312 | poly1305_splat: | |
313 | and x12,$h0,#0x03ffffff // base 2^64 -> base 2^26 | |
314 | ubfx x13,$h0,#26,#26 | |
315 | extr x14,$h1,$h0,#52 | |
316 | and x14,x14,#0x03ffffff | |
317 | ubfx x15,$h1,#14,#26 | |
318 | extr x16,$h2,$h1,#40 | |
319 | ||
320 | str w12,[$ctx,#16*0] // r0 | |
321 | add w12,w13,w13,lsl#2 // r1*5 | |
322 | str w13,[$ctx,#16*1] // r1 | |
323 | add w13,w14,w14,lsl#2 // r2*5 | |
324 | str w12,[$ctx,#16*2] // s1 | |
325 | str w14,[$ctx,#16*3] // r2 | |
326 | add w14,w15,w15,lsl#2 // r3*5 | |
327 | str w13,[$ctx,#16*4] // s2 | |
328 | str w15,[$ctx,#16*5] // r3 | |
329 | add w15,w16,w16,lsl#2 // r4*5 | |
330 | str w14,[$ctx,#16*6] // s3 | |
331 | str w16,[$ctx,#16*7] // r4 | |
332 | str w15,[$ctx,#16*8] // s4 | |
333 | ||
334 | ret | |
335 | .size poly1305_splat,.-poly1305_splat | |
336 | ||
337 | #ifdef __KERNEL__ | |
338 | .globl poly1305_blocks_neon | |
339 | #endif | |
340 | .type poly1305_blocks_neon,%function | |
341 | .align 5 | |
342 | poly1305_blocks_neon: | |
343 | .Lpoly1305_blocks_neon: | |
344 | ldr $is_base2_26,[$ctx,#24] | |
345 | cmp $len,#128 | |
346 | b.lo .Lpoly1305_blocks | |
347 | ||
348 | .inst 0xd503233f // paciasp | |
349 | stp x29,x30,[sp,#-80]! | |
350 | add x29,sp,#0 | |
351 | ||
352 | stp d8,d9,[sp,#16] // meet ABI requirements | |
353 | stp d10,d11,[sp,#32] | |
354 | stp d12,d13,[sp,#48] | |
355 | stp d14,d15,[sp,#64] | |
356 | ||
357 | cbz $is_base2_26,.Lbase2_64_neon | |
358 | ||
359 | ldp w10,w11,[$ctx] // load hash value base 2^26 | |
360 | ldp w12,w13,[$ctx,#8] | |
361 | ldr w14,[$ctx,#16] | |
362 | ||
363 | tst $len,#31 | |
364 | b.eq .Leven_neon | |
365 | ||
366 | ldp $r0,$r1,[$ctx,#32] // load key value | |
367 | ||
368 | add $h0,x10,x11,lsl#26 // base 2^26 -> base 2^64 | |
369 | lsr $h1,x12,#12 | |
370 | adds $h0,$h0,x12,lsl#52 | |
371 | add $h1,$h1,x13,lsl#14 | |
372 | adc $h1,$h1,xzr | |
373 | lsr $h2,x14,#24 | |
374 | adds $h1,$h1,x14,lsl#40 | |
375 | adc $d2,$h2,xzr // can be partially reduced... | |
376 | ||
377 | ldp $d0,$d1,[$inp],#16 // load input | |
378 | sub $len,$len,#16 | |
379 | add $s1,$r1,$r1,lsr#2 // s1 = r1 + (r1 >> 2) | |
380 | ||
381 | #ifdef __AARCH64EB__ | |
382 | rev $d0,$d0 | |
383 | rev $d1,$d1 | |
384 | #endif | |
385 | adds $h0,$h0,$d0 // accumulate input | |
386 | adcs $h1,$h1,$d1 | |
387 | adc $h2,$h2,$padbit | |
388 | ||
389 | bl poly1305_mult | |
390 | ||
391 | and x10,$h0,#0x03ffffff // base 2^64 -> base 2^26 | |
392 | ubfx x11,$h0,#26,#26 | |
393 | extr x12,$h1,$h0,#52 | |
394 | and x12,x12,#0x03ffffff | |
395 | ubfx x13,$h1,#14,#26 | |
396 | extr x14,$h2,$h1,#40 | |
397 | ||
398 | b .Leven_neon | |
399 | ||
400 | .align 4 | |
401 | .Lbase2_64_neon: | |
402 | ldp $r0,$r1,[$ctx,#32] // load key value | |
403 | ||
404 | ldp $h0,$h1,[$ctx] // load hash value base 2^64 | |
405 | ldr $h2,[$ctx,#16] | |
406 | ||
407 | tst $len,#31 | |
408 | b.eq .Linit_neon | |
409 | ||
410 | ldp $d0,$d1,[$inp],#16 // load input | |
411 | sub $len,$len,#16 | |
412 | add $s1,$r1,$r1,lsr#2 // s1 = r1 + (r1 >> 2) | |
413 | #ifdef __AARCH64EB__ | |
414 | rev $d0,$d0 | |
415 | rev $d1,$d1 | |
416 | #endif | |
417 | adds $h0,$h0,$d0 // accumulate input | |
418 | adcs $h1,$h1,$d1 | |
419 | adc $h2,$h2,$padbit | |
420 | ||
421 | bl poly1305_mult | |
422 | ||
423 | .Linit_neon: | |
424 | ldr w17,[$ctx,#48] // first table element | |
425 | and x10,$h0,#0x03ffffff // base 2^64 -> base 2^26 | |
426 | ubfx x11,$h0,#26,#26 | |
427 | extr x12,$h1,$h0,#52 | |
428 | and x12,x12,#0x03ffffff | |
429 | ubfx x13,$h1,#14,#26 | |
430 | extr x14,$h2,$h1,#40 | |
431 | ||
432 | cmp w17,#-1 // is value impossible? | |
433 | b.ne .Leven_neon | |
434 | ||
435 | fmov ${H0},x10 | |
436 | fmov ${H1},x11 | |
437 | fmov ${H2},x12 | |
438 | fmov ${H3},x13 | |
439 | fmov ${H4},x14 | |
440 | ||
441 | ////////////////////////////////// initialize r^n table | |
442 | mov $h0,$r0 // r^1 | |
443 | add $s1,$r1,$r1,lsr#2 // s1 = r1 + (r1 >> 2) | |
444 | mov $h1,$r1 | |
445 | mov $h2,xzr | |
446 | add $ctx,$ctx,#48+12 | |
447 | bl poly1305_splat | |
448 | ||
449 | bl poly1305_mult // r^2 | |
450 | sub $ctx,$ctx,#4 | |
451 | bl poly1305_splat | |
452 | ||
453 | bl poly1305_mult // r^3 | |
454 | sub $ctx,$ctx,#4 | |
455 | bl poly1305_splat | |
456 | ||
457 | bl poly1305_mult // r^4 | |
458 | sub $ctx,$ctx,#4 | |
459 | bl poly1305_splat | |
460 | sub $ctx,$ctx,#48 // restore original $ctx | |
461 | b .Ldo_neon | |
462 | ||
463 | .align 4 | |
464 | .Leven_neon: | |
465 | fmov ${H0},x10 | |
466 | fmov ${H1},x11 | |
467 | fmov ${H2},x12 | |
468 | fmov ${H3},x13 | |
469 | fmov ${H4},x14 | |
470 | ||
471 | .Ldo_neon: | |
472 | ldp x8,x12,[$inp,#32] // inp[2:3] | |
473 | subs $len,$len,#64 | |
474 | ldp x9,x13,[$inp,#48] | |
475 | add $in2,$inp,#96 | |
476 | adr $zeros,.Lzeros | |
477 | ||
478 | lsl $padbit,$padbit,#24 | |
479 | add x15,$ctx,#48 | |
480 | ||
481 | #ifdef __AARCH64EB__ | |
482 | rev x8,x8 | |
483 | rev x12,x12 | |
484 | rev x9,x9 | |
485 | rev x13,x13 | |
486 | #endif | |
487 | and x4,x8,#0x03ffffff // base 2^64 -> base 2^26 | |
488 | and x5,x9,#0x03ffffff | |
489 | ubfx x6,x8,#26,#26 | |
490 | ubfx x7,x9,#26,#26 | |
491 | add x4,x4,x5,lsl#32 // bfi x4,x5,#32,#32 | |
492 | extr x8,x12,x8,#52 | |
493 | extr x9,x13,x9,#52 | |
494 | add x6,x6,x7,lsl#32 // bfi x6,x7,#32,#32 | |
495 | fmov $IN23_0,x4 | |
496 | and x8,x8,#0x03ffffff | |
497 | and x9,x9,#0x03ffffff | |
498 | ubfx x10,x12,#14,#26 | |
499 | ubfx x11,x13,#14,#26 | |
500 | add x12,$padbit,x12,lsr#40 | |
501 | add x13,$padbit,x13,lsr#40 | |
502 | add x8,x8,x9,lsl#32 // bfi x8,x9,#32,#32 | |
503 | fmov $IN23_1,x6 | |
504 | add x10,x10,x11,lsl#32 // bfi x10,x11,#32,#32 | |
505 | add x12,x12,x13,lsl#32 // bfi x12,x13,#32,#32 | |
506 | fmov $IN23_2,x8 | |
507 | fmov $IN23_3,x10 | |
508 | fmov $IN23_4,x12 | |
509 | ||
510 | ldp x8,x12,[$inp],#16 // inp[0:1] | |
511 | ldp x9,x13,[$inp],#48 | |
512 | ||
513 | ld1 {$R0,$R1,$S1,$R2},[x15],#64 | |
514 | ld1 {$S2,$R3,$S3,$R4},[x15],#64 | |
515 | ld1 {$S4},[x15] | |
516 | ||
517 | #ifdef __AARCH64EB__ | |
518 | rev x8,x8 | |
519 | rev x12,x12 | |
520 | rev x9,x9 | |
521 | rev x13,x13 | |
522 | #endif | |
523 | and x4,x8,#0x03ffffff // base 2^64 -> base 2^26 | |
524 | and x5,x9,#0x03ffffff | |
525 | ubfx x6,x8,#26,#26 | |
526 | ubfx x7,x9,#26,#26 | |
527 | add x4,x4,x5,lsl#32 // bfi x4,x5,#32,#32 | |
528 | extr x8,x12,x8,#52 | |
529 | extr x9,x13,x9,#52 | |
530 | add x6,x6,x7,lsl#32 // bfi x6,x7,#32,#32 | |
531 | fmov $IN01_0,x4 | |
532 | and x8,x8,#0x03ffffff | |
533 | and x9,x9,#0x03ffffff | |
534 | ubfx x10,x12,#14,#26 | |
535 | ubfx x11,x13,#14,#26 | |
536 | add x12,$padbit,x12,lsr#40 | |
537 | add x13,$padbit,x13,lsr#40 | |
538 | add x8,x8,x9,lsl#32 // bfi x8,x9,#32,#32 | |
539 | fmov $IN01_1,x6 | |
540 | add x10,x10,x11,lsl#32 // bfi x10,x11,#32,#32 | |
541 | add x12,x12,x13,lsl#32 // bfi x12,x13,#32,#32 | |
542 | movi $MASK.2d,#-1 | |
543 | fmov $IN01_2,x8 | |
544 | fmov $IN01_3,x10 | |
545 | fmov $IN01_4,x12 | |
546 | ushr $MASK.2d,$MASK.2d,#38 | |
547 | ||
548 | b.ls .Lskip_loop | |
549 | ||
550 | .align 4 | |
551 | .Loop_neon: | |
552 | //////////////////////////////////////////////////////////////// | |
553 | // ((inp[0]*r^4+inp[2]*r^2+inp[4])*r^4+inp[6]*r^2 | |
554 | // ((inp[1]*r^4+inp[3]*r^2+inp[5])*r^3+inp[7]*r | |
555 | // \___________________/ | |
556 | // ((inp[0]*r^4+inp[2]*r^2+inp[4])*r^4+inp[6]*r^2+inp[8])*r^2 | |
557 | // ((inp[1]*r^4+inp[3]*r^2+inp[5])*r^4+inp[7]*r^2+inp[9])*r | |
558 | // \___________________/ \____________________/ | |
559 | // | |
560 | // Note that we start with inp[2:3]*r^2. This is because it | |
561 | // doesn't depend on reduction in previous iteration. | |
562 | //////////////////////////////////////////////////////////////// | |
563 | // d4 = h0*r4 + h1*r3 + h2*r2 + h3*r1 + h4*r0 | |
564 | // d3 = h0*r3 + h1*r2 + h2*r1 + h3*r0 + h4*5*r4 | |
565 | // d2 = h0*r2 + h1*r1 + h2*r0 + h3*5*r4 + h4*5*r3 | |
566 | // d1 = h0*r1 + h1*r0 + h2*5*r4 + h3*5*r3 + h4*5*r2 | |
567 | // d0 = h0*r0 + h1*5*r4 + h2*5*r3 + h3*5*r2 + h4*5*r1 | |
568 | ||
569 | subs $len,$len,#64 | |
570 | umull $ACC4,$IN23_0,${R4}[2] | |
571 | csel $in2,$zeros,$in2,lo | |
572 | umull $ACC3,$IN23_0,${R3}[2] | |
573 | umull $ACC2,$IN23_0,${R2}[2] | |
574 | ldp x8,x12,[$in2],#16 // inp[2:3] (or zero) | |
575 | umull $ACC1,$IN23_0,${R1}[2] | |
576 | ldp x9,x13,[$in2],#48 | |
577 | umull $ACC0,$IN23_0,${R0}[2] | |
578 | #ifdef __AARCH64EB__ | |
579 | rev x8,x8 | |
580 | rev x12,x12 | |
581 | rev x9,x9 | |
582 | rev x13,x13 | |
583 | #endif | |
584 | ||
585 | umlal $ACC4,$IN23_1,${R3}[2] | |
586 | and x4,x8,#0x03ffffff // base 2^64 -> base 2^26 | |
587 | umlal $ACC3,$IN23_1,${R2}[2] | |
588 | and x5,x9,#0x03ffffff | |
589 | umlal $ACC2,$IN23_1,${R1}[2] | |
590 | ubfx x6,x8,#26,#26 | |
591 | umlal $ACC1,$IN23_1,${R0}[2] | |
592 | ubfx x7,x9,#26,#26 | |
593 | umlal $ACC0,$IN23_1,${S4}[2] | |
594 | add x4,x4,x5,lsl#32 // bfi x4,x5,#32,#32 | |
595 | ||
596 | umlal $ACC4,$IN23_2,${R2}[2] | |
597 | extr x8,x12,x8,#52 | |
598 | umlal $ACC3,$IN23_2,${R1}[2] | |
599 | extr x9,x13,x9,#52 | |
600 | umlal $ACC2,$IN23_2,${R0}[2] | |
601 | add x6,x6,x7,lsl#32 // bfi x6,x7,#32,#32 | |
602 | umlal $ACC1,$IN23_2,${S4}[2] | |
603 | fmov $IN23_0,x4 | |
604 | umlal $ACC0,$IN23_2,${S3}[2] | |
605 | and x8,x8,#0x03ffffff | |
606 | ||
607 | umlal $ACC4,$IN23_3,${R1}[2] | |
608 | and x9,x9,#0x03ffffff | |
609 | umlal $ACC3,$IN23_3,${R0}[2] | |
610 | ubfx x10,x12,#14,#26 | |
611 | umlal $ACC2,$IN23_3,${S4}[2] | |
612 | ubfx x11,x13,#14,#26 | |
613 | umlal $ACC1,$IN23_3,${S3}[2] | |
614 | add x8,x8,x9,lsl#32 // bfi x8,x9,#32,#32 | |
615 | umlal $ACC0,$IN23_3,${S2}[2] | |
616 | fmov $IN23_1,x6 | |
617 | ||
618 | add $IN01_2,$IN01_2,$H2 | |
619 | add x12,$padbit,x12,lsr#40 | |
620 | umlal $ACC4,$IN23_4,${R0}[2] | |
621 | add x13,$padbit,x13,lsr#40 | |
622 | umlal $ACC3,$IN23_4,${S4}[2] | |
623 | add x10,x10,x11,lsl#32 // bfi x10,x11,#32,#32 | |
624 | umlal $ACC2,$IN23_4,${S3}[2] | |
625 | add x12,x12,x13,lsl#32 // bfi x12,x13,#32,#32 | |
626 | umlal $ACC1,$IN23_4,${S2}[2] | |
627 | fmov $IN23_2,x8 | |
628 | umlal $ACC0,$IN23_4,${S1}[2] | |
629 | fmov $IN23_3,x10 | |
630 | ||
631 | //////////////////////////////////////////////////////////////// | |
632 | // (hash+inp[0:1])*r^4 and accumulate | |
633 | ||
634 | add $IN01_0,$IN01_0,$H0 | |
635 | fmov $IN23_4,x12 | |
636 | umlal $ACC3,$IN01_2,${R1}[0] | |
637 | ldp x8,x12,[$inp],#16 // inp[0:1] | |
638 | umlal $ACC0,$IN01_2,${S3}[0] | |
639 | ldp x9,x13,[$inp],#48 | |
640 | umlal $ACC4,$IN01_2,${R2}[0] | |
641 | umlal $ACC1,$IN01_2,${S4}[0] | |
642 | umlal $ACC2,$IN01_2,${R0}[0] | |
643 | #ifdef __AARCH64EB__ | |
644 | rev x8,x8 | |
645 | rev x12,x12 | |
646 | rev x9,x9 | |
647 | rev x13,x13 | |
648 | #endif | |
649 | ||
650 | add $IN01_1,$IN01_1,$H1 | |
651 | umlal $ACC3,$IN01_0,${R3}[0] | |
652 | umlal $ACC4,$IN01_0,${R4}[0] | |
653 | and x4,x8,#0x03ffffff // base 2^64 -> base 2^26 | |
654 | umlal $ACC2,$IN01_0,${R2}[0] | |
655 | and x5,x9,#0x03ffffff | |
656 | umlal $ACC0,$IN01_0,${R0}[0] | |
657 | ubfx x6,x8,#26,#26 | |
658 | umlal $ACC1,$IN01_0,${R1}[0] | |
659 | ubfx x7,x9,#26,#26 | |
660 | ||
661 | add $IN01_3,$IN01_3,$H3 | |
662 | add x4,x4,x5,lsl#32 // bfi x4,x5,#32,#32 | |
663 | umlal $ACC3,$IN01_1,${R2}[0] | |
664 | extr x8,x12,x8,#52 | |
665 | umlal $ACC4,$IN01_1,${R3}[0] | |
666 | extr x9,x13,x9,#52 | |
667 | umlal $ACC0,$IN01_1,${S4}[0] | |
668 | add x6,x6,x7,lsl#32 // bfi x6,x7,#32,#32 | |
669 | umlal $ACC2,$IN01_1,${R1}[0] | |
670 | fmov $IN01_0,x4 | |
671 | umlal $ACC1,$IN01_1,${R0}[0] | |
672 | and x8,x8,#0x03ffffff | |
673 | ||
674 | add $IN01_4,$IN01_4,$H4 | |
675 | and x9,x9,#0x03ffffff | |
676 | umlal $ACC3,$IN01_3,${R0}[0] | |
677 | ubfx x10,x12,#14,#26 | |
678 | umlal $ACC0,$IN01_3,${S2}[0] | |
679 | ubfx x11,x13,#14,#26 | |
680 | umlal $ACC4,$IN01_3,${R1}[0] | |
681 | add x8,x8,x9,lsl#32 // bfi x8,x9,#32,#32 | |
682 | umlal $ACC1,$IN01_3,${S3}[0] | |
683 | fmov $IN01_1,x6 | |
684 | umlal $ACC2,$IN01_3,${S4}[0] | |
685 | add x12,$padbit,x12,lsr#40 | |
686 | ||
687 | umlal $ACC3,$IN01_4,${S4}[0] | |
688 | add x13,$padbit,x13,lsr#40 | |
689 | umlal $ACC0,$IN01_4,${S1}[0] | |
690 | add x10,x10,x11,lsl#32 // bfi x10,x11,#32,#32 | |
691 | umlal $ACC4,$IN01_4,${R0}[0] | |
692 | add x12,x12,x13,lsl#32 // bfi x12,x13,#32,#32 | |
693 | umlal $ACC1,$IN01_4,${S2}[0] | |
694 | fmov $IN01_2,x8 | |
695 | umlal $ACC2,$IN01_4,${S3}[0] | |
696 | fmov $IN01_3,x10 | |
697 | fmov $IN01_4,x12 | |
698 | ||
699 | ///////////////////////////////////////////////////////////////// | |
700 | // lazy reduction as discussed in "NEON crypto" by D.J. Bernstein | |
701 | // and P. Schwabe | |
702 | // | |
703 | // [see discussion in poly1305-armv4 module] | |
704 | ||
705 | ushr $T0.2d,$ACC3,#26 | |
706 | xtn $H3,$ACC3 | |
707 | ushr $T1.2d,$ACC0,#26 | |
708 | and $ACC0,$ACC0,$MASK.2d | |
709 | add $ACC4,$ACC4,$T0.2d // h3 -> h4 | |
710 | bic $H3,#0xfc,lsl#24 // &=0x03ffffff | |
711 | add $ACC1,$ACC1,$T1.2d // h0 -> h1 | |
712 | ||
713 | ushr $T0.2d,$ACC4,#26 | |
714 | xtn $H4,$ACC4 | |
715 | ushr $T1.2d,$ACC1,#26 | |
716 | xtn $H1,$ACC1 | |
717 | bic $H4,#0xfc,lsl#24 | |
718 | add $ACC2,$ACC2,$T1.2d // h1 -> h2 | |
719 | ||
720 | add $ACC0,$ACC0,$T0.2d | |
721 | shl $T0.2d,$T0.2d,#2 | |
722 | shrn $T1.2s,$ACC2,#26 | |
723 | xtn $H2,$ACC2 | |
724 | add $ACC0,$ACC0,$T0.2d // h4 -> h0 | |
725 | bic $H1,#0xfc,lsl#24 | |
726 | add $H3,$H3,$T1.2s // h2 -> h3 | |
727 | bic $H2,#0xfc,lsl#24 | |
728 | ||
729 | shrn $T0.2s,$ACC0,#26 | |
730 | xtn $H0,$ACC0 | |
731 | ushr $T1.2s,$H3,#26 | |
732 | bic $H3,#0xfc,lsl#24 | |
733 | bic $H0,#0xfc,lsl#24 | |
734 | add $H1,$H1,$T0.2s // h0 -> h1 | |
735 | add $H4,$H4,$T1.2s // h3 -> h4 | |
736 | ||
737 | b.hi .Loop_neon | |
738 | ||
739 | .Lskip_loop: | |
740 | dup $IN23_2,${IN23_2}[0] | |
741 | add $IN01_2,$IN01_2,$H2 | |
742 | ||
743 | //////////////////////////////////////////////////////////////// | |
744 | // multiply (inp[0:1]+hash) or inp[2:3] by r^2:r^1 | |
745 | ||
746 | adds $len,$len,#32 | |
747 | b.ne .Long_tail | |
748 | ||
749 | dup $IN23_2,${IN01_2}[0] | |
750 | add $IN23_0,$IN01_0,$H0 | |
751 | add $IN23_3,$IN01_3,$H3 | |
752 | add $IN23_1,$IN01_1,$H1 | |
753 | add $IN23_4,$IN01_4,$H4 | |
754 | ||
755 | .Long_tail: | |
756 | dup $IN23_0,${IN23_0}[0] | |
757 | umull2 $ACC0,$IN23_2,${S3} | |
758 | umull2 $ACC3,$IN23_2,${R1} | |
759 | umull2 $ACC4,$IN23_2,${R2} | |
760 | umull2 $ACC2,$IN23_2,${R0} | |
761 | umull2 $ACC1,$IN23_2,${S4} | |
762 | ||
763 | dup $IN23_1,${IN23_1}[0] | |
764 | umlal2 $ACC0,$IN23_0,${R0} | |
765 | umlal2 $ACC2,$IN23_0,${R2} | |
766 | umlal2 $ACC3,$IN23_0,${R3} | |
767 | umlal2 $ACC4,$IN23_0,${R4} | |
768 | umlal2 $ACC1,$IN23_0,${R1} | |
769 | ||
770 | dup $IN23_3,${IN23_3}[0] | |
771 | umlal2 $ACC0,$IN23_1,${S4} | |
772 | umlal2 $ACC3,$IN23_1,${R2} | |
773 | umlal2 $ACC2,$IN23_1,${R1} | |
774 | umlal2 $ACC4,$IN23_1,${R3} | |
775 | umlal2 $ACC1,$IN23_1,${R0} | |
776 | ||
777 | dup $IN23_4,${IN23_4}[0] | |
778 | umlal2 $ACC3,$IN23_3,${R0} | |
779 | umlal2 $ACC4,$IN23_3,${R1} | |
780 | umlal2 $ACC0,$IN23_3,${S2} | |
781 | umlal2 $ACC1,$IN23_3,${S3} | |
782 | umlal2 $ACC2,$IN23_3,${S4} | |
783 | ||
784 | umlal2 $ACC3,$IN23_4,${S4} | |
785 | umlal2 $ACC0,$IN23_4,${S1} | |
786 | umlal2 $ACC4,$IN23_4,${R0} | |
787 | umlal2 $ACC1,$IN23_4,${S2} | |
788 | umlal2 $ACC2,$IN23_4,${S3} | |
789 | ||
790 | b.eq .Lshort_tail | |
791 | ||
792 | //////////////////////////////////////////////////////////////// | |
793 | // (hash+inp[0:1])*r^4:r^3 and accumulate | |
794 | ||
795 | add $IN01_0,$IN01_0,$H0 | |
796 | umlal $ACC3,$IN01_2,${R1} | |
797 | umlal $ACC0,$IN01_2,${S3} | |
798 | umlal $ACC4,$IN01_2,${R2} | |
799 | umlal $ACC1,$IN01_2,${S4} | |
800 | umlal $ACC2,$IN01_2,${R0} | |
801 | ||
802 | add $IN01_1,$IN01_1,$H1 | |
803 | umlal $ACC3,$IN01_0,${R3} | |
804 | umlal $ACC0,$IN01_0,${R0} | |
805 | umlal $ACC4,$IN01_0,${R4} | |
806 | umlal $ACC1,$IN01_0,${R1} | |
807 | umlal $ACC2,$IN01_0,${R2} | |
808 | ||
809 | add $IN01_3,$IN01_3,$H3 | |
810 | umlal $ACC3,$IN01_1,${R2} | |
811 | umlal $ACC0,$IN01_1,${S4} | |
812 | umlal $ACC4,$IN01_1,${R3} | |
813 | umlal $ACC1,$IN01_1,${R0} | |
814 | umlal $ACC2,$IN01_1,${R1} | |
815 | ||
816 | add $IN01_4,$IN01_4,$H4 | |
817 | umlal $ACC3,$IN01_3,${R0} | |
818 | umlal $ACC0,$IN01_3,${S2} | |
819 | umlal $ACC4,$IN01_3,${R1} | |
820 | umlal $ACC1,$IN01_3,${S3} | |
821 | umlal $ACC2,$IN01_3,${S4} | |
822 | ||
823 | umlal $ACC3,$IN01_4,${S4} | |
824 | umlal $ACC0,$IN01_4,${S1} | |
825 | umlal $ACC4,$IN01_4,${R0} | |
826 | umlal $ACC1,$IN01_4,${S2} | |
827 | umlal $ACC2,$IN01_4,${S3} | |
828 | ||
829 | .Lshort_tail: | |
830 | //////////////////////////////////////////////////////////////// | |
831 | // horizontal add | |
832 | ||
833 | addp $ACC3,$ACC3,$ACC3 | |
834 | ldp d8,d9,[sp,#16] // meet ABI requirements | |
835 | addp $ACC0,$ACC0,$ACC0 | |
836 | ldp d10,d11,[sp,#32] | |
837 | addp $ACC4,$ACC4,$ACC4 | |
838 | ldp d12,d13,[sp,#48] | |
839 | addp $ACC1,$ACC1,$ACC1 | |
840 | ldp d14,d15,[sp,#64] | |
841 | addp $ACC2,$ACC2,$ACC2 | |
842 | ldr x30,[sp,#8] | |
f569ca16 AB |
843 | |
844 | //////////////////////////////////////////////////////////////// | |
845 | // lazy reduction, but without narrowing | |
846 | ||
847 | ushr $T0.2d,$ACC3,#26 | |
848 | and $ACC3,$ACC3,$MASK.2d | |
849 | ushr $T1.2d,$ACC0,#26 | |
850 | and $ACC0,$ACC0,$MASK.2d | |
851 | ||
852 | add $ACC4,$ACC4,$T0.2d // h3 -> h4 | |
853 | add $ACC1,$ACC1,$T1.2d // h0 -> h1 | |
854 | ||
855 | ushr $T0.2d,$ACC4,#26 | |
856 | and $ACC4,$ACC4,$MASK.2d | |
857 | ushr $T1.2d,$ACC1,#26 | |
858 | and $ACC1,$ACC1,$MASK.2d | |
859 | add $ACC2,$ACC2,$T1.2d // h1 -> h2 | |
860 | ||
861 | add $ACC0,$ACC0,$T0.2d | |
862 | shl $T0.2d,$T0.2d,#2 | |
863 | ushr $T1.2d,$ACC2,#26 | |
864 | and $ACC2,$ACC2,$MASK.2d | |
865 | add $ACC0,$ACC0,$T0.2d // h4 -> h0 | |
866 | add $ACC3,$ACC3,$T1.2d // h2 -> h3 | |
867 | ||
868 | ushr $T0.2d,$ACC0,#26 | |
869 | and $ACC0,$ACC0,$MASK.2d | |
870 | ushr $T1.2d,$ACC3,#26 | |
871 | and $ACC3,$ACC3,$MASK.2d | |
872 | add $ACC1,$ACC1,$T0.2d // h0 -> h1 | |
873 | add $ACC4,$ACC4,$T1.2d // h3 -> h4 | |
874 | ||
875 | //////////////////////////////////////////////////////////////// | |
876 | // write the result, can be partially reduced | |
877 | ||
878 | st4 {$ACC0,$ACC1,$ACC2,$ACC3}[0],[$ctx],#16 | |
879 | mov x4,#1 | |
880 | st1 {$ACC4}[0],[$ctx] | |
881 | str x4,[$ctx,#8] // set is_base2_26 | |
882 | ||
883 | ldr x29,[sp],#80 | |
519a0d7e | 884 | .inst 0xd50323bf // autiasp |
f569ca16 AB |
885 | ret |
886 | .size poly1305_blocks_neon,.-poly1305_blocks_neon | |
887 | ||
888 | .align 5 | |
889 | .Lzeros: | |
890 | .long 0,0,0,0,0,0,0,0 | |
891 | .asciz "Poly1305 for ARMv8, CRYPTOGAMS by \@dot-asm" | |
892 | .align 2 | |
893 | #if !defined(__KERNEL__) && !defined(_WIN64) | |
894 | .comm OPENSSL_armcap_P,4,4 | |
895 | .hidden OPENSSL_armcap_P | |
896 | #endif | |
897 | ___ | |
898 | ||
899 | foreach (split("\n",$code)) { | |
900 | s/\b(shrn\s+v[0-9]+)\.[24]d/$1.2s/ or | |
901 | s/\b(fmov\s+)v([0-9]+)[^,]*,\s*x([0-9]+)/$1d$2,x$3/ or | |
902 | (m/\bdup\b/ and (s/\.[24]s/.2d/g or 1)) or | |
903 | (m/\b(eor|and)/ and (s/\.[248][sdh]/.16b/g or 1)) or | |
904 | (m/\bum(ul|la)l\b/ and (s/\.4s/.2s/g or 1)) or | |
905 | (m/\bum(ul|la)l2\b/ and (s/\.2s/.4s/g or 1)) or | |
906 | (m/\bst[1-4]\s+{[^}]+}\[/ and (s/\.[24]d/.s/g or 1)); | |
907 | ||
908 | s/\.[124]([sd])\[/.$1\[/; | |
909 | s/w#x([0-9]+)/w$1/g; | |
910 | ||
911 | print $_,"\n"; | |
912 | } | |
913 | close STDOUT; |