| blob | 3a2dc3dc6cac162bc51946bb08cf8da745c73f57 |
1 /*
2 * ChaCha20 256-bit cipher algorithm, RFC7539, x64 AVX2 functions
3 *
4 * Copyright (C) 2015 Martin Willi
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
12 #include <linux/linkage.h>
14 .section .rodata.cst32.ROT8, "aM", @progbits, 32
15 .align 32
16 ROT8: .octa 0x0e0d0c0f0a09080b0605040702010003
17 .octa 0x0e0d0c0f0a09080b0605040702010003
19 .section .rodata.cst32.ROT16, "aM", @progbits, 32
20 .align 32
21 ROT16: .octa 0x0d0c0f0e09080b0a0504070601000302
22 .octa 0x0d0c0f0e09080b0a0504070601000302
24 .section .rodata.cst32.CTRINC, "aM", @progbits, 32
25 .align 32
26 CTRINC: .octa 0x00000003000000020000000100000000
27 .octa 0x00000007000000060000000500000004
29 .text
31 ENTRY(chacha20_8block_xor_avx2)
32 # %rdi: Input state matrix, s
33 # %rsi: 8 data blocks output, o
34 # %rdx: 8 data blocks input, i
36 # This function encrypts eight consecutive ChaCha20 blocks by loading
37 # the state matrix in AVX registers eight times. As we need some
38 # scratch registers, we save the first four registers on the stack. The
39 # algorithm performs each operation on the corresponding word of each
40 # state matrix, hence requires no word shuffling. For final XORing step
41 # we transpose the matrix by interleaving 32-, 64- and then 128-bit
42 # words, which allows us to do XOR in AVX registers. 8/16-bit word
43 # rotation is done with the slightly better performing byte shuffling,
44 # 7/12-bit word rotation uses traditional shift+OR.
46 vzeroupper
47 # 4 * 32 byte stack, 32-byte aligned
48 mov %rsp, %r8
49 and $~31, %rsp
50 sub $0x80, %rsp
52 # x0..15[0-7] = s[0..15]
53 vpbroadcastd 0x00(%rdi),%ymm0
54 vpbroadcastd 0x04(%rdi),%ymm1
55 vpbroadcastd 0x08(%rdi),%ymm2
56 vpbroadcastd 0x0c(%rdi),%ymm3
57 vpbroadcastd 0x10(%rdi),%ymm4
58 vpbroadcastd 0x14(%rdi),%ymm5
59 vpbroadcastd 0x18(%rdi),%ymm6
60 vpbroadcastd 0x1c(%rdi),%ymm7
61 vpbroadcastd 0x20(%rdi),%ymm8
62 vpbroadcastd 0x24(%rdi),%ymm9
63 vpbroadcastd 0x28(%rdi),%ymm10
64 vpbroadcastd 0x2c(%rdi),%ymm11
65 vpbroadcastd 0x30(%rdi),%ymm12
66 vpbroadcastd 0x34(%rdi),%ymm13
67 vpbroadcastd 0x38(%rdi),%ymm14
68 vpbroadcastd 0x3c(%rdi),%ymm15
69 # x0..3 on stack
70 vmovdqa %ymm0,0x00(%rsp)
71 vmovdqa %ymm1,0x20(%rsp)
72 vmovdqa %ymm2,0x40(%rsp)
73 vmovdqa %ymm3,0x60(%rsp)
75 vmovdqa CTRINC(%rip),%ymm1
76 vmovdqa ROT8(%rip),%ymm2
77 vmovdqa ROT16(%rip),%ymm3
79 # x12 += counter values 0-3
80 vpaddd %ymm1,%ymm12,%ymm12
82 mov $10,%ecx
84 .Ldoubleround8:
85 # x0 += x4, x12 = rotl32(x12 ^ x0, 16)
86 vpaddd 0x00(%rsp),%ymm4,%ymm0
87 vmovdqa %ymm0,0x00(%rsp)
88 vpxor %ymm0,%ymm12,%ymm12
89 vpshufb %ymm3,%ymm12,%ymm12
90 # x1 += x5, x13 = rotl32(x13 ^ x1, 16)
91 vpaddd 0x20(%rsp),%ymm5,%ymm0
92 vmovdqa %ymm0,0x20(%rsp)
93 vpxor %ymm0,%ymm13,%ymm13
94 vpshufb %ymm3,%ymm13,%ymm13
95 # x2 += x6, x14 = rotl32(x14 ^ x2, 16)
96 vpaddd 0x40(%rsp),%ymm6,%ymm0
97 vmovdqa %ymm0,0x40(%rsp)
98 vpxor %ymm0,%ymm14,%ymm14
99 vpshufb %ymm3,%ymm14,%ymm14
100 # x3 += x7, x15 = rotl32(x15 ^ x3, 16)
101 vpaddd 0x60(%rsp),%ymm7,%ymm0
102 vmovdqa %ymm0,0x60(%rsp)
103 vpxor %ymm0,%ymm15,%ymm15
104 vpshufb %ymm3,%ymm15,%ymm15
106 # x8 += x12, x4 = rotl32(x4 ^ x8, 12)
107 vpaddd %ymm12,%ymm8,%ymm8
108 vpxor %ymm8,%ymm4,%ymm4
109 vpslld $12,%ymm4,%ymm0
110 vpsrld $20,%ymm4,%ymm4
111 vpor %ymm0,%ymm4,%ymm4
112 # x9 += x13, x5 = rotl32(x5 ^ x9, 12)
113 vpaddd %ymm13,%ymm9,%ymm9
114 vpxor %ymm9,%ymm5,%ymm5
115 vpslld $12,%ymm5,%ymm0
116 vpsrld $20,%ymm5,%ymm5
117 vpor %ymm0,%ymm5,%ymm5
118 # x10 += x14, x6 = rotl32(x6 ^ x10, 12)
119 vpaddd %ymm14,%ymm10,%ymm10
120 vpxor %ymm10,%ymm6,%ymm6
121 vpslld $12,%ymm6,%ymm0
122 vpsrld $20,%ymm6,%ymm6
123 vpor %ymm0,%ymm6,%ymm6
124 # x11 += x15, x7 = rotl32(x7 ^ x11, 12)
125 vpaddd %ymm15,%ymm11,%ymm11
126 vpxor %ymm11,%ymm7,%ymm7
127 vpslld $12,%ymm7,%ymm0
128 vpsrld $20,%ymm7,%ymm7
129 vpor %ymm0,%ymm7,%ymm7
131 # x0 += x4, x12 = rotl32(x12 ^ x0, 8)
132 vpaddd 0x00(%rsp),%ymm4,%ymm0
133 vmovdqa %ymm0,0x00(%rsp)
134 vpxor %ymm0,%ymm12,%ymm12
135 vpshufb %ymm2,%ymm12,%ymm12
136 # x1 += x5, x13 = rotl32(x13 ^ x1, 8)
137 vpaddd 0x20(%rsp),%ymm5,%ymm0
138 vmovdqa %ymm0,0x20(%rsp)
139 vpxor %ymm0,%ymm13,%ymm13
140 vpshufb %ymm2,%ymm13,%ymm13
141 # x2 += x6, x14 = rotl32(x14 ^ x2, 8)
142 vpaddd 0x40(%rsp),%ymm6,%ymm0
143 vmovdqa %ymm0,0x40(%rsp)
144 vpxor %ymm0,%ymm14,%ymm14
145 vpshufb %ymm2,%ymm14,%ymm14
146 # x3 += x7, x15 = rotl32(x15 ^ x3, 8)
147 vpaddd 0x60(%rsp),%ymm7,%ymm0
148 vmovdqa %ymm0,0x60(%rsp)
149 vpxor %ymm0,%ymm15,%ymm15
150 vpshufb %ymm2,%ymm15,%ymm15
152 # x8 += x12, x4 = rotl32(x4 ^ x8, 7)
153 vpaddd %ymm12,%ymm8,%ymm8
154 vpxor %ymm8,%ymm4,%ymm4
155 vpslld $7,%ymm4,%ymm0
156 vpsrld $25,%ymm4,%ymm4
157 vpor %ymm0,%ymm4,%ymm4
158 # x9 += x13, x5 = rotl32(x5 ^ x9, 7)
159 vpaddd %ymm13,%ymm9,%ymm9
160 vpxor %ymm9,%ymm5,%ymm5
161 vpslld $7,%ymm5,%ymm0
162 vpsrld $25,%ymm5,%ymm5
163 vpor %ymm0,%ymm5,%ymm5
164 # x10 += x14, x6 = rotl32(x6 ^ x10, 7)
165 vpaddd %ymm14,%ymm10,%ymm10
166 vpxor %ymm10,%ymm6,%ymm6
167 vpslld $7,%ymm6,%ymm0
168 vpsrld $25,%ymm6,%ymm6
169 vpor %ymm0,%ymm6,%ymm6
170 # x11 += x15, x7 = rotl32(x7 ^ x11, 7)
171 vpaddd %ymm15,%ymm11,%ymm11
172 vpxor %ymm11,%ymm7,%ymm7
173 vpslld $7,%ymm7,%ymm0
174 vpsrld $25,%ymm7,%ymm7
175 vpor %ymm0,%ymm7,%ymm7
177 # x0 += x5, x15 = rotl32(x15 ^ x0, 16)
178 vpaddd 0x00(%rsp),%ymm5,%ymm0
179 vmovdqa %ymm0,0x00(%rsp)
180 vpxor %ymm0,%ymm15,%ymm15
181 vpshufb %ymm3,%ymm15,%ymm15
182 # x1 += x6, x12 = rotl32(x12 ^ x1, 16)%ymm0
183 vpaddd 0x20(%rsp),%ymm6,%ymm0
184 vmovdqa %ymm0,0x20(%rsp)
185 vpxor %ymm0,%ymm12,%ymm12
186 vpshufb %ymm3,%ymm12,%ymm12
187 # x2 += x7, x13 = rotl32(x13 ^ x2, 16)
188 vpaddd 0x40(%rsp),%ymm7,%ymm0
189 vmovdqa %ymm0,0x40(%rsp)
190 vpxor %ymm0,%ymm13,%ymm13
191 vpshufb %ymm3,%ymm13,%ymm13
192 # x3 += x4, x14 = rotl32(x14 ^ x3, 16)
193 vpaddd 0x60(%rsp),%ymm4,%ymm0
194 vmovdqa %ymm0,0x60(%rsp)
195 vpxor %ymm0,%ymm14,%ymm14
196 vpshufb %ymm3,%ymm14,%ymm14
198 # x10 += x15, x5 = rotl32(x5 ^ x10, 12)
199 vpaddd %ymm15,%ymm10,%ymm10
200 vpxor %ymm10,%ymm5,%ymm5
201 vpslld $12,%ymm5,%ymm0
202 vpsrld $20,%ymm5,%ymm5
203 vpor %ymm0,%ymm5,%ymm5
204 # x11 += x12, x6 = rotl32(x6 ^ x11, 12)
205 vpaddd %ymm12,%ymm11,%ymm11
206 vpxor %ymm11,%ymm6,%ymm6
207 vpslld $12,%ymm6,%ymm0
208 vpsrld $20,%ymm6,%ymm6
209 vpor %ymm0,%ymm6,%ymm6
210 # x8 += x13, x7 = rotl32(x7 ^ x8, 12)
211 vpaddd %ymm13,%ymm8,%ymm8
212 vpxor %ymm8,%ymm7,%ymm7
213 vpslld $12,%ymm7,%ymm0
214 vpsrld $20,%ymm7,%ymm7
215 vpor %ymm0,%ymm7,%ymm7
216 # x9 += x14, x4 = rotl32(x4 ^ x9, 12)
217 vpaddd %ymm14,%ymm9,%ymm9
218 vpxor %ymm9,%ymm4,%ymm4
219 vpslld $12,%ymm4,%ymm0
220 vpsrld $20,%ymm4,%ymm4
221 vpor %ymm0,%ymm4,%ymm4
223 # x0 += x5, x15 = rotl32(x15 ^ x0, 8)
224 vpaddd 0x00(%rsp),%ymm5,%ymm0
225 vmovdqa %ymm0,0x00(%rsp)
226 vpxor %ymm0,%ymm15,%ymm15
227 vpshufb %ymm2,%ymm15,%ymm15
228 # x1 += x6, x12 = rotl32(x12 ^ x1, 8)
229 vpaddd 0x20(%rsp),%ymm6,%ymm0
230 vmovdqa %ymm0,0x20(%rsp)
231 vpxor %ymm0,%ymm12,%ymm12
232 vpshufb %ymm2,%ymm12,%ymm12
233 # x2 += x7, x13 = rotl32(x13 ^ x2, 8)
234 vpaddd 0x40(%rsp),%ymm7,%ymm0
235 vmovdqa %ymm0,0x40(%rsp)
236 vpxor %ymm0,%ymm13,%ymm13
237 vpshufb %ymm2,%ymm13,%ymm13
238 # x3 += x4, x14 = rotl32(x14 ^ x3, 8)
239 vpaddd 0x60(%rsp),%ymm4,%ymm0
240 vmovdqa %ymm0,0x60(%rsp)
241 vpxor %ymm0,%ymm14,%ymm14
242 vpshufb %ymm2,%ymm14,%ymm14
244 # x10 += x15, x5 = rotl32(x5 ^ x10, 7)
245 vpaddd %ymm15,%ymm10,%ymm10
246 vpxor %ymm10,%ymm5,%ymm5
247 vpslld $7,%ymm5,%ymm0
248 vpsrld $25,%ymm5,%ymm5
249 vpor %ymm0,%ymm5,%ymm5
250 # x11 += x12, x6 = rotl32(x6 ^ x11, 7)
251 vpaddd %ymm12,%ymm11,%ymm11
252 vpxor %ymm11,%ymm6,%ymm6
253 vpslld $7,%ymm6,%ymm0
254 vpsrld $25,%ymm6,%ymm6
255 vpor %ymm0,%ymm6,%ymm6
256 # x8 += x13, x7 = rotl32(x7 ^ x8, 7)
257 vpaddd %ymm13,%ymm8,%ymm8
258 vpxor %ymm8,%ymm7,%ymm7
259 vpslld $7,%ymm7,%ymm0
260 vpsrld $25,%ymm7,%ymm7
261 vpor %ymm0,%ymm7,%ymm7
262 # x9 += x14, x4 = rotl32(x4 ^ x9, 7)
263 vpaddd %ymm14,%ymm9,%ymm9
264 vpxor %ymm9,%ymm4,%ymm4
265 vpslld $7,%ymm4,%ymm0
266 vpsrld $25,%ymm4,%ymm4
267 vpor %ymm0,%ymm4,%ymm4
269 dec %ecx
270 jnz .Ldoubleround8
272 # x0..15[0-3] += s[0..15]
273 vpbroadcastd 0x00(%rdi),%ymm0
274 vpaddd 0x00(%rsp),%ymm0,%ymm0
275 vmovdqa %ymm0,0x00(%rsp)
276 vpbroadcastd 0x04(%rdi),%ymm0
277 vpaddd 0x20(%rsp),%ymm0,%ymm0
278 vmovdqa %ymm0,0x20(%rsp)
279 vpbroadcastd 0x08(%rdi),%ymm0
280 vpaddd 0x40(%rsp),%ymm0,%ymm0
281 vmovdqa %ymm0,0x40(%rsp)
282 vpbroadcastd 0x0c(%rdi),%ymm0
283 vpaddd 0x60(%rsp),%ymm0,%ymm0
284 vmovdqa %ymm0,0x60(%rsp)
285 vpbroadcastd 0x10(%rdi),%ymm0
286 vpaddd %ymm0,%ymm4,%ymm4
287 vpbroadcastd 0x14(%rdi),%ymm0
288 vpaddd %ymm0,%ymm5,%ymm5
289 vpbroadcastd 0x18(%rdi),%ymm0
290 vpaddd %ymm0,%ymm6,%ymm6
291 vpbroadcastd 0x1c(%rdi),%ymm0
292 vpaddd %ymm0,%ymm7,%ymm7
293 vpbroadcastd 0x20(%rdi),%ymm0
294 vpaddd %ymm0,%ymm8,%ymm8
295 vpbroadcastd 0x24(%rdi),%ymm0
296 vpaddd %ymm0,%ymm9,%ymm9
297 vpbroadcastd 0x28(%rdi),%ymm0
298 vpaddd %ymm0,%ymm10,%ymm10
299 vpbroadcastd 0x2c(%rdi),%ymm0
300 vpaddd %ymm0,%ymm11,%ymm11
301 vpbroadcastd 0x30(%rdi),%ymm0
302 vpaddd %ymm0,%ymm12,%ymm12
303 vpbroadcastd 0x34(%rdi),%ymm0
304 vpaddd %ymm0,%ymm13,%ymm13
305 vpbroadcastd 0x38(%rdi),%ymm0
306 vpaddd %ymm0,%ymm14,%ymm14
307 vpbroadcastd 0x3c(%rdi),%ymm0
308 vpaddd %ymm0,%ymm15,%ymm15
310 # x12 += counter values 0-3
311 vpaddd %ymm1,%ymm12,%ymm12
313 # interleave 32-bit words in state n, n+1
314 vmovdqa 0x00(%rsp),%ymm0
315 vmovdqa 0x20(%rsp),%ymm1
316 vpunpckldq %ymm1,%ymm0,%ymm2
317 vpunpckhdq %ymm1,%ymm0,%ymm1
318 vmovdqa %ymm2,0x00(%rsp)
319 vmovdqa %ymm1,0x20(%rsp)
320 vmovdqa 0x40(%rsp),%ymm0
321 vmovdqa 0x60(%rsp),%ymm1
322 vpunpckldq %ymm1,%ymm0,%ymm2
323 vpunpckhdq %ymm1,%ymm0,%ymm1
324 vmovdqa %ymm2,0x40(%rsp)
325 vmovdqa %ymm1,0x60(%rsp)
326 vmovdqa %ymm4,%ymm0
327 vpunpckldq %ymm5,%ymm0,%ymm4
328 vpunpckhdq %ymm5,%ymm0,%ymm5
329 vmovdqa %ymm6,%ymm0
330 vpunpckldq %ymm7,%ymm0,%ymm6
331 vpunpckhdq %ymm7,%ymm0,%ymm7
332 vmovdqa %ymm8,%ymm0
333 vpunpckldq %ymm9,%ymm0,%ymm8
334 vpunpckhdq %ymm9,%ymm0,%ymm9
335 vmovdqa %ymm10,%ymm0
336 vpunpckldq %ymm11,%ymm0,%ymm10
337 vpunpckhdq %ymm11,%ymm0,%ymm11
338 vmovdqa %ymm12,%ymm0
339 vpunpckldq %ymm13,%ymm0,%ymm12
340 vpunpckhdq %ymm13,%ymm0,%ymm13
341 vmovdqa %ymm14,%ymm0
342 vpunpckldq %ymm15,%ymm0,%ymm14
343 vpunpckhdq %ymm15,%ymm0,%ymm15
345 # interleave 64-bit words in state n, n+2
346 vmovdqa 0x00(%rsp),%ymm0
347 vmovdqa 0x40(%rsp),%ymm2
348 vpunpcklqdq %ymm2,%ymm0,%ymm1
349 vpunpckhqdq %ymm2,%ymm0,%ymm2
350 vmovdqa %ymm1,0x00(%rsp)
351 vmovdqa %ymm2,0x40(%rsp)
352 vmovdqa 0x20(%rsp),%ymm0
353 vmovdqa 0x60(%rsp),%ymm2
354 vpunpcklqdq %ymm2,%ymm0,%ymm1
355 vpunpckhqdq %ymm2,%ymm0,%ymm2
356 vmovdqa %ymm1,0x20(%rsp)
357 vmovdqa %ymm2,0x60(%rsp)
358 vmovdqa %ymm4,%ymm0
359 vpunpcklqdq %ymm6,%ymm0,%ymm4
360 vpunpckhqdq %ymm6,%ymm0,%ymm6
361 vmovdqa %ymm5,%ymm0
362 vpunpcklqdq %ymm7,%ymm0,%ymm5
363 vpunpckhqdq %ymm7,%ymm0,%ymm7
364 vmovdqa %ymm8,%ymm0
365 vpunpcklqdq %ymm10,%ymm0,%ymm8
366 vpunpckhqdq %ymm10,%ymm0,%ymm10
367 vmovdqa %ymm9,%ymm0
368 vpunpcklqdq %ymm11,%ymm0,%ymm9
369 vpunpckhqdq %ymm11,%ymm0,%ymm11
370 vmovdqa %ymm12,%ymm0
371 vpunpcklqdq %ymm14,%ymm0,%ymm12
372 vpunpckhqdq %ymm14,%ymm0,%ymm14
373 vmovdqa %ymm13,%ymm0
374 vpunpcklqdq %ymm15,%ymm0,%ymm13
375 vpunpckhqdq %ymm15,%ymm0,%ymm15
377 # interleave 128-bit words in state n, n+4
378 vmovdqa 0x00(%rsp),%ymm0
379 vperm2i128 $0x20,%ymm4,%ymm0,%ymm1
380 vperm2i128 $0x31,%ymm4,%ymm0,%ymm4
381 vmovdqa %ymm1,0x00(%rsp)
382 vmovdqa 0x20(%rsp),%ymm0
383 vperm2i128 $0x20,%ymm5,%ymm0,%ymm1
384 vperm2i128 $0x31,%ymm5,%ymm0,%ymm5
385 vmovdqa %ymm1,0x20(%rsp)
386 vmovdqa 0x40(%rsp),%ymm0
387 vperm2i128 $0x20,%ymm6,%ymm0,%ymm1
388 vperm2i128 $0x31,%ymm6,%ymm0,%ymm6
389 vmovdqa %ymm1,0x40(%rsp)
390 vmovdqa 0x60(%rsp),%ymm0
391 vperm2i128 $0x20,%ymm7,%ymm0,%ymm1
392 vperm2i128 $0x31,%ymm7,%ymm0,%ymm7
393 vmovdqa %ymm1,0x60(%rsp)
394 vperm2i128 $0x20,%ymm12,%ymm8,%ymm0
395 vperm2i128 $0x31,%ymm12,%ymm8,%ymm12
396 vmovdqa %ymm0,%ymm8
397 vperm2i128 $0x20,%ymm13,%ymm9,%ymm0
398 vperm2i128 $0x31,%ymm13,%ymm9,%ymm13
399 vmovdqa %ymm0,%ymm9
400 vperm2i128 $0x20,%ymm14,%ymm10,%ymm0
401 vperm2i128 $0x31,%ymm14,%ymm10,%ymm14
402 vmovdqa %ymm0,%ymm10
403 vperm2i128 $0x20,%ymm15,%ymm11,%ymm0
404 vperm2i128 $0x31,%ymm15,%ymm11,%ymm15
405 vmovdqa %ymm0,%ymm11
407 # xor with corresponding input, write to output
408 vmovdqa 0x00(%rsp),%ymm0
409 vpxor 0x0000(%rdx),%ymm0,%ymm0
410 vmovdqu %ymm0,0x0000(%rsi)
411 vmovdqa 0x20(%rsp),%ymm0
412 vpxor 0x0080(%rdx),%ymm0,%ymm0
413 vmovdqu %ymm0,0x0080(%rsi)
414 vmovdqa 0x40(%rsp),%ymm0
415 vpxor 0x0040(%rdx),%ymm0,%ymm0
416 vmovdqu %ymm0,0x0040(%rsi)
417 vmovdqa 0x60(%rsp),%ymm0
418 vpxor 0x00c0(%rdx),%ymm0,%ymm0
419 vmovdqu %ymm0,0x00c0(%rsi)
420 vpxor 0x0100(%rdx),%ymm4,%ymm4
421 vmovdqu %ymm4,0x0100(%rsi)
422 vpxor 0x0180(%rdx),%ymm5,%ymm5
423 vmovdqu %ymm5,0x00180(%rsi)
424 vpxor 0x0140(%rdx),%ymm6,%ymm6
425 vmovdqu %ymm6,0x0140(%rsi)
426 vpxor 0x01c0(%rdx),%ymm7,%ymm7
427 vmovdqu %ymm7,0x01c0(%rsi)
428 vpxor 0x0020(%rdx),%ymm8,%ymm8
429 vmovdqu %ymm8,0x0020(%rsi)
430 vpxor 0x00a0(%rdx),%ymm9,%ymm9
431 vmovdqu %ymm9,0x00a0(%rsi)
432 vpxor 0x0060(%rdx),%ymm10,%ymm10
433 vmovdqu %ymm10,0x0060(%rsi)
434 vpxor 0x00e0(%rdx),%ymm11,%ymm11
435 vmovdqu %ymm11,0x00e0(%rsi)
436 vpxor 0x0120(%rdx),%ymm12,%ymm12
437 vmovdqu %ymm12,0x0120(%rsi)
438 vpxor 0x01a0(%rdx),%ymm13,%ymm13
439 vmovdqu %ymm13,0x01a0(%rsi)
440 vpxor 0x0160(%rdx),%ymm14,%ymm14
441 vmovdqu %ymm14,0x0160(%rsi)
442 vpxor 0x01e0(%rdx),%ymm15,%ymm15
443 vmovdqu %ymm15,0x01e0(%rsi)
445 vzeroupper
446 mov %r8,%rsp
447 ret
448 ENDPROC(chacha20_8block_xor_avx2)