| blob | d348f1553a793b3713688ee5de98a640c3bdf161 |
1 /*
2 * Serpent Cipher 4-way parallel algorithm (i586/SSE2)
3 *
4 * Copyright (C) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
5 *
6 * Based on crypto/serpent.c by
7 * Copyright (C) 2002 Dag Arne Osvik <osvik@ii.uib.no>
8 * 2003 Herbert Valerio Riedel <hvr@gnu.org>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
23 * USA
24 *
25 */
27 #include <linux/linkage.h>
29 .file "serpent-sse2-i586-asm_32.S"
30 .text
32 #define arg_ctx 4
33 #define arg_dst 8
34 #define arg_src 12
35 #define arg_xor 16
37 /**********************************************************************
38 4-way SSE2 serpent
39 **********************************************************************/
40 #define CTX %edx
42 #define RA %xmm0
43 #define RB %xmm1
44 #define RC %xmm2
45 #define RD %xmm3
46 #define RE %xmm4
48 #define RT0 %xmm5
49 #define RT1 %xmm6
51 #define RNOT %xmm7
53 #define get_key(i, j, t) \
54 movd (4*(i)+(j))*4(CTX), t; \
55 pshufd $0, t, t;
57 #define K(x0, x1, x2, x3, x4, i) \
58 get_key(i, 0, x4); \
59 get_key(i, 1, RT0); \
60 get_key(i, 2, RT1); \
61 pxor x4, x0; \
62 pxor RT0, x1; \
63 pxor RT1, x2; \
64 get_key(i, 3, x4); \
65 pxor x4, x3;
67 #define LK(x0, x1, x2, x3, x4, i) \
68 movdqa x0, x4; \
69 pslld $13, x0; \
70 psrld $(32 - 13), x4; \
71 por x4, x0; \
72 pxor x0, x1; \
73 movdqa x2, x4; \
74 pslld $3, x2; \
75 psrld $(32 - 3), x4; \
76 por x4, x2; \
77 pxor x2, x1; \
78 movdqa x1, x4; \
79 pslld $1, x1; \
80 psrld $(32 - 1), x4; \
81 por x4, x1; \
82 movdqa x0, x4; \
83 pslld $3, x4; \
84 pxor x2, x3; \
85 pxor x4, x3; \
86 movdqa x3, x4; \
87 pslld $7, x3; \
88 psrld $(32 - 7), x4; \
89 por x4, x3; \
90 movdqa x1, x4; \
91 pslld $7, x4; \
92 pxor x1, x0; \
93 pxor x3, x0; \
94 pxor x3, x2; \
95 pxor x4, x2; \
96 movdqa x0, x4; \
97 get_key(i, 1, RT0); \
98 pxor RT0, x1; \
99 get_key(i, 3, RT0); \
100 pxor RT0, x3; \
101 pslld $5, x0; \
102 psrld $(32 - 5), x4; \
103 por x4, x0; \
104 movdqa x2, x4; \
105 pslld $22, x2; \
106 psrld $(32 - 22), x4; \
107 por x4, x2; \
108 get_key(i, 0, RT0); \
109 pxor RT0, x0; \
110 get_key(i, 2, RT0); \
111 pxor RT0, x2;
113 #define KL(x0, x1, x2, x3, x4, i) \
114 K(x0, x1, x2, x3, x4, i); \
115 movdqa x0, x4; \
116 psrld $5, x0; \
117 pslld $(32 - 5), x4; \
118 por x4, x0; \
119 movdqa x2, x4; \
120 psrld $22, x2; \
121 pslld $(32 - 22), x4; \
122 por x4, x2; \
123 pxor x3, x2; \
124 pxor x3, x0; \
125 movdqa x1, x4; \
126 pslld $7, x4; \
127 pxor x1, x0; \
128 pxor x4, x2; \
129 movdqa x1, x4; \
130 psrld $1, x1; \
131 pslld $(32 - 1), x4; \
132 por x4, x1; \
133 movdqa x3, x4; \
134 psrld $7, x3; \
135 pslld $(32 - 7), x4; \
136 por x4, x3; \
137 pxor x0, x1; \
138 movdqa x0, x4; \
139 pslld $3, x4; \
140 pxor x4, x3; \
141 movdqa x0, x4; \
142 psrld $13, x0; \
143 pslld $(32 - 13), x4; \
144 por x4, x0; \
145 pxor x2, x1; \
146 pxor x2, x3; \
147 movdqa x2, x4; \
148 psrld $3, x2; \
149 pslld $(32 - 3), x4; \
150 por x4, x2;
152 #define S0(x0, x1, x2, x3, x4) \
153 movdqa x3, x4; \
154 por x0, x3; \
155 pxor x4, x0; \
156 pxor x2, x4; \
157 pxor RNOT, x4; \
158 pxor x1, x3; \
159 pand x0, x1; \
160 pxor x4, x1; \
161 pxor x0, x2; \
162 pxor x3, x0; \
163 por x0, x4; \
164 pxor x2, x0; \
165 pand x1, x2; \
166 pxor x2, x3; \
167 pxor RNOT, x1; \
168 pxor x4, x2; \
169 pxor x2, x1;
171 #define S1(x0, x1, x2, x3, x4) \
172 movdqa x1, x4; \
173 pxor x0, x1; \
174 pxor x3, x0; \
175 pxor RNOT, x3; \
176 pand x1, x4; \
177 por x1, x0; \
178 pxor x2, x3; \
179 pxor x3, x0; \
180 pxor x3, x1; \
181 pxor x4, x3; \
182 por x4, x1; \
183 pxor x2, x4; \
184 pand x0, x2; \
185 pxor x1, x2; \
186 por x0, x1; \
187 pxor RNOT, x0; \
188 pxor x2, x0; \
189 pxor x1, x4;
191 #define S2(x0, x1, x2, x3, x4) \
192 pxor RNOT, x3; \
193 pxor x0, x1; \
194 movdqa x0, x4; \
195 pand x2, x0; \
196 pxor x3, x0; \
197 por x4, x3; \
198 pxor x1, x2; \
199 pxor x1, x3; \
200 pand x0, x1; \
201 pxor x2, x0; \
202 pand x3, x2; \
203 por x1, x3; \
204 pxor RNOT, x0; \
205 pxor x0, x3; \
206 pxor x0, x4; \
207 pxor x2, x0; \
208 por x2, x1;
210 #define S3(x0, x1, x2, x3, x4) \
211 movdqa x1, x4; \
212 pxor x3, x1; \
213 por x0, x3; \
214 pand x0, x4; \
215 pxor x2, x0; \
216 pxor x1, x2; \
217 pand x3, x1; \
218 pxor x3, x2; \
219 por x4, x0; \
220 pxor x3, x4; \
221 pxor x0, x1; \
222 pand x3, x0; \
223 pand x4, x3; \
224 pxor x2, x3; \
225 por x1, x4; \
226 pand x1, x2; \
227 pxor x3, x4; \
228 pxor x3, x0; \
229 pxor x2, x3;
231 #define S4(x0, x1, x2, x3, x4) \
232 movdqa x3, x4; \
233 pand x0, x3; \
234 pxor x4, x0; \
235 pxor x2, x3; \
236 por x4, x2; \
237 pxor x1, x0; \
238 pxor x3, x4; \
239 por x0, x2; \
240 pxor x1, x2; \
241 pand x0, x1; \
242 pxor x4, x1; \
243 pand x2, x4; \
244 pxor x3, x2; \
245 pxor x0, x4; \
246 por x1, x3; \
247 pxor RNOT, x1; \
248 pxor x0, x3;
250 #define S5(x0, x1, x2, x3, x4) \
251 movdqa x1, x4; \
252 por x0, x1; \
253 pxor x1, x2; \
254 pxor RNOT, x3; \
255 pxor x0, x4; \
256 pxor x2, x0; \
257 pand x4, x1; \
258 por x3, x4; \
259 pxor x0, x4; \
260 pand x3, x0; \
261 pxor x3, x1; \
262 pxor x2, x3; \
263 pxor x1, x0; \
264 pand x4, x2; \
265 pxor x2, x1; \
266 pand x0, x2; \
267 pxor x2, x3;
269 #define S6(x0, x1, x2, x3, x4) \
270 movdqa x1, x4; \
271 pxor x0, x3; \
272 pxor x2, x1; \
273 pxor x0, x2; \
274 pand x3, x0; \
275 por x3, x1; \
276 pxor RNOT, x4; \
277 pxor x1, x0; \
278 pxor x2, x1; \
279 pxor x4, x3; \
280 pxor x0, x4; \
281 pand x0, x2; \
282 pxor x1, x4; \
283 pxor x3, x2; \
284 pand x1, x3; \
285 pxor x0, x3; \
286 pxor x2, x1;
288 #define S7(x0, x1, x2, x3, x4) \
289 pxor RNOT, x1; \
290 movdqa x1, x4; \
291 pxor RNOT, x0; \
292 pand x2, x1; \
293 pxor x3, x1; \
294 por x4, x3; \
295 pxor x2, x4; \
296 pxor x3, x2; \
297 pxor x0, x3; \
298 por x1, x0; \
299 pand x0, x2; \
300 pxor x4, x0; \
301 pxor x3, x4; \
302 pand x0, x3; \
303 pxor x1, x4; \
304 pxor x4, x2; \
305 pxor x1, x3; \
306 por x0, x4; \
307 pxor x1, x4;
309 #define SI0(x0, x1, x2, x3, x4) \
310 movdqa x3, x4; \
311 pxor x0, x1; \
312 por x1, x3; \
313 pxor x1, x4; \
314 pxor RNOT, x0; \
315 pxor x3, x2; \
316 pxor x0, x3; \
317 pand x1, x0; \
318 pxor x2, x0; \
319 pand x3, x2; \
320 pxor x4, x3; \
321 pxor x3, x2; \
322 pxor x3, x1; \
323 pand x0, x3; \
324 pxor x0, x1; \
325 pxor x2, x0; \
326 pxor x3, x4;
328 #define SI1(x0, x1, x2, x3, x4) \
329 pxor x3, x1; \
330 movdqa x0, x4; \
331 pxor x2, x0; \
332 pxor RNOT, x2; \
333 por x1, x4; \
334 pxor x3, x4; \
335 pand x1, x3; \
336 pxor x2, x1; \
337 pand x4, x2; \
338 pxor x1, x4; \
339 por x3, x1; \
340 pxor x0, x3; \
341 pxor x0, x2; \
342 por x4, x0; \
343 pxor x4, x2; \
344 pxor x0, x1; \
345 pxor x1, x4;
347 #define SI2(x0, x1, x2, x3, x4) \
348 pxor x1, x2; \
349 movdqa x3, x4; \
350 pxor RNOT, x3; \
351 por x2, x3; \
352 pxor x4, x2; \
353 pxor x0, x4; \
354 pxor x1, x3; \
355 por x2, x1; \
356 pxor x0, x2; \
357 pxor x4, x1; \
358 por x3, x4; \
359 pxor x3, x2; \
360 pxor x2, x4; \
361 pand x1, x2; \
362 pxor x3, x2; \
363 pxor x4, x3; \
364 pxor x0, x4;
366 #define SI3(x0, x1, x2, x3, x4) \
367 pxor x1, x2; \
368 movdqa x1, x4; \
369 pand x2, x1; \
370 pxor x0, x1; \
371 por x4, x0; \
372 pxor x3, x4; \
373 pxor x3, x0; \
374 por x1, x3; \
375 pxor x2, x1; \
376 pxor x3, x1; \
377 pxor x2, x0; \
378 pxor x3, x2; \
379 pand x1, x3; \
380 pxor x0, x1; \
381 pand x2, x0; \
382 pxor x3, x4; \
383 pxor x0, x3; \
384 pxor x1, x0;
386 #define SI4(x0, x1, x2, x3, x4) \
387 pxor x3, x2; \
388 movdqa x0, x4; \
389 pand x1, x0; \
390 pxor x2, x0; \
391 por x3, x2; \
392 pxor RNOT, x4; \
393 pxor x0, x1; \
394 pxor x2, x0; \
395 pand x4, x2; \
396 pxor x0, x2; \
397 por x4, x0; \
398 pxor x3, x0; \
399 pand x2, x3; \
400 pxor x3, x4; \
401 pxor x1, x3; \
402 pand x0, x1; \
403 pxor x1, x4; \
404 pxor x3, x0;
406 #define SI5(x0, x1, x2, x3, x4) \
407 movdqa x1, x4; \
408 por x2, x1; \
409 pxor x4, x2; \
410 pxor x3, x1; \
411 pand x4, x3; \
412 pxor x3, x2; \
413 por x0, x3; \
414 pxor RNOT, x0; \
415 pxor x2, x3; \
416 por x0, x2; \
417 pxor x1, x4; \
418 pxor x4, x2; \
419 pand x0, x4; \
420 pxor x1, x0; \
421 pxor x3, x1; \
422 pand x2, x0; \
423 pxor x3, x2; \
424 pxor x2, x0; \
425 pxor x4, x2; \
426 pxor x3, x4;
428 #define SI6(x0, x1, x2, x3, x4) \
429 pxor x2, x0; \
430 movdqa x0, x4; \
431 pand x3, x0; \
432 pxor x3, x2; \
433 pxor x2, x0; \
434 pxor x1, x3; \
435 por x4, x2; \
436 pxor x3, x2; \
437 pand x0, x3; \
438 pxor RNOT, x0; \
439 pxor x1, x3; \
440 pand x2, x1; \
441 pxor x0, x4; \
442 pxor x4, x3; \
443 pxor x2, x4; \
444 pxor x1, x0; \
445 pxor x0, x2;
447 #define SI7(x0, x1, x2, x3, x4) \
448 movdqa x3, x4; \
449 pand x0, x3; \
450 pxor x2, x0; \
451 por x4, x2; \
452 pxor x1, x4; \
453 pxor RNOT, x0; \
454 por x3, x1; \
455 pxor x0, x4; \
456 pand x2, x0; \
457 pxor x1, x0; \
458 pand x2, x1; \
459 pxor x2, x3; \
460 pxor x3, x4; \
461 pand x3, x2; \
462 por x0, x3; \
463 pxor x4, x1; \
464 pxor x4, x3; \
465 pand x0, x4; \
466 pxor x2, x4;
468 #define transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
469 movdqa x0, t2; \
470 punpckldq x1, x0; \
471 punpckhdq x1, t2; \
472 movdqa x2, t1; \
473 punpckhdq x3, x2; \
474 punpckldq x3, t1; \
475 movdqa x0, x1; \
476 punpcklqdq t1, x0; \
477 punpckhqdq t1, x1; \
478 movdqa t2, x3; \
479 punpcklqdq x2, t2; \
480 punpckhqdq x2, x3; \
481 movdqa t2, x2;
483 #define read_blocks(in, x0, x1, x2, x3, t0, t1, t2) \
484 movdqu (0*4*4)(in), x0; \
485 movdqu (1*4*4)(in), x1; \
486 movdqu (2*4*4)(in), x2; \
487 movdqu (3*4*4)(in), x3; \
488 \
489 transpose_4x4(x0, x1, x2, x3, t0, t1, t2)
491 #define write_blocks(out, x0, x1, x2, x3, t0, t1, t2) \
492 transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
493 \
494 movdqu x0, (0*4*4)(out); \
495 movdqu x1, (1*4*4)(out); \
496 movdqu x2, (2*4*4)(out); \
497 movdqu x3, (3*4*4)(out);
499 #define xor_blocks(out, x0, x1, x2, x3, t0, t1, t2) \
500 transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
501 \
502 movdqu (0*4*4)(out), t0; \
503 pxor t0, x0; \
504 movdqu x0, (0*4*4)(out); \
505 movdqu (1*4*4)(out), t0; \
506 pxor t0, x1; \
507 movdqu x1, (1*4*4)(out); \
508 movdqu (2*4*4)(out), t0; \
509 pxor t0, x2; \
510 movdqu x2, (2*4*4)(out); \
511 movdqu (3*4*4)(out), t0; \
512 pxor t0, x3; \
513 movdqu x3, (3*4*4)(out);
515 ENTRY(__serpent_enc_blk_4way)
516 /* input:
517 * arg_ctx(%esp): ctx, CTX
518 * arg_dst(%esp): dst
519 * arg_src(%esp): src
520 * arg_xor(%esp): bool, if true: xor output
521 */
523 pcmpeqd RNOT, RNOT;
525 movl arg_ctx(%esp), CTX;
527 movl arg_src(%esp), %eax;
528 read_blocks(%eax, RA, RB, RC, RD, RT0, RT1, RE);
530 K(RA, RB, RC, RD, RE, 0);
531 S0(RA, RB, RC, RD, RE); LK(RC, RB, RD, RA, RE, 1);
532 S1(RC, RB, RD, RA, RE); LK(RE, RD, RA, RC, RB, 2);
533 S2(RE, RD, RA, RC, RB); LK(RB, RD, RE, RC, RA, 3);
534 S3(RB, RD, RE, RC, RA); LK(RC, RA, RD, RB, RE, 4);
535 S4(RC, RA, RD, RB, RE); LK(RA, RD, RB, RE, RC, 5);
536 S5(RA, RD, RB, RE, RC); LK(RC, RA, RD, RE, RB, 6);
537 S6(RC, RA, RD, RE, RB); LK(RD, RB, RA, RE, RC, 7);
538 S7(RD, RB, RA, RE, RC); LK(RC, RA, RE, RD, RB, 8);
539 S0(RC, RA, RE, RD, RB); LK(RE, RA, RD, RC, RB, 9);
540 S1(RE, RA, RD, RC, RB); LK(RB, RD, RC, RE, RA, 10);
541 S2(RB, RD, RC, RE, RA); LK(RA, RD, RB, RE, RC, 11);
542 S3(RA, RD, RB, RE, RC); LK(RE, RC, RD, RA, RB, 12);
543 S4(RE, RC, RD, RA, RB); LK(RC, RD, RA, RB, RE, 13);
544 S5(RC, RD, RA, RB, RE); LK(RE, RC, RD, RB, RA, 14);
545 S6(RE, RC, RD, RB, RA); LK(RD, RA, RC, RB, RE, 15);
546 S7(RD, RA, RC, RB, RE); LK(RE, RC, RB, RD, RA, 16);
547 S0(RE, RC, RB, RD, RA); LK(RB, RC, RD, RE, RA, 17);
548 S1(RB, RC, RD, RE, RA); LK(RA, RD, RE, RB, RC, 18);
549 S2(RA, RD, RE, RB, RC); LK(RC, RD, RA, RB, RE, 19);
550 S3(RC, RD, RA, RB, RE); LK(RB, RE, RD, RC, RA, 20);
551 S4(RB, RE, RD, RC, RA); LK(RE, RD, RC, RA, RB, 21);
552 S5(RE, RD, RC, RA, RB); LK(RB, RE, RD, RA, RC, 22);
553 S6(RB, RE, RD, RA, RC); LK(RD, RC, RE, RA, RB, 23);
554 S7(RD, RC, RE, RA, RB); LK(RB, RE, RA, RD, RC, 24);
555 S0(RB, RE, RA, RD, RC); LK(RA, RE, RD, RB, RC, 25);
556 S1(RA, RE, RD, RB, RC); LK(RC, RD, RB, RA, RE, 26);
557 S2(RC, RD, RB, RA, RE); LK(RE, RD, RC, RA, RB, 27);
558 S3(RE, RD, RC, RA, RB); LK(RA, RB, RD, RE, RC, 28);
559 S4(RA, RB, RD, RE, RC); LK(RB, RD, RE, RC, RA, 29);
560 S5(RB, RD, RE, RC, RA); LK(RA, RB, RD, RC, RE, 30);
561 S6(RA, RB, RD, RC, RE); LK(RD, RE, RB, RC, RA, 31);
562 S7(RD, RE, RB, RC, RA); K(RA, RB, RC, RD, RE, 32);
564 movl arg_dst(%esp), %eax;
566 cmpb $0, arg_xor(%esp);
567 jnz .L__enc_xor4;
569 write_blocks(%eax, RA, RB, RC, RD, RT0, RT1, RE);
571 ret;
573 .L__enc_xor4:
574 xor_blocks(%eax, RA, RB, RC, RD, RT0, RT1, RE);
576 ret;
577 ENDPROC(__serpent_enc_blk_4way)
579 ENTRY(serpent_dec_blk_4way)
580 /* input:
581 * arg_ctx(%esp): ctx, CTX
582 * arg_dst(%esp): dst
583 * arg_src(%esp): src
584 */
586 pcmpeqd RNOT, RNOT;
588 movl arg_ctx(%esp), CTX;
590 movl arg_src(%esp), %eax;
591 read_blocks(%eax, RA, RB, RC, RD, RT0, RT1, RE);
593 K(RA, RB, RC, RD, RE, 32);
594 SI7(RA, RB, RC, RD, RE); KL(RB, RD, RA, RE, RC, 31);
595 SI6(RB, RD, RA, RE, RC); KL(RA, RC, RE, RB, RD, 30);
596 SI5(RA, RC, RE, RB, RD); KL(RC, RD, RA, RE, RB, 29);
597 SI4(RC, RD, RA, RE, RB); KL(RC, RA, RB, RE, RD, 28);
598 SI3(RC, RA, RB, RE, RD); KL(RB, RC, RD, RE, RA, 27);
599 SI2(RB, RC, RD, RE, RA); KL(RC, RA, RE, RD, RB, 26);
600 SI1(RC, RA, RE, RD, RB); KL(RB, RA, RE, RD, RC, 25);
601 SI0(RB, RA, RE, RD, RC); KL(RE, RC, RA, RB, RD, 24);
602 SI7(RE, RC, RA, RB, RD); KL(RC, RB, RE, RD, RA, 23);
603 SI6(RC, RB, RE, RD, RA); KL(RE, RA, RD, RC, RB, 22);
604 SI5(RE, RA, RD, RC, RB); KL(RA, RB, RE, RD, RC, 21);
605 SI4(RA, RB, RE, RD, RC); KL(RA, RE, RC, RD, RB, 20);
606 SI3(RA, RE, RC, RD, RB); KL(RC, RA, RB, RD, RE, 19);
607 SI2(RC, RA, RB, RD, RE); KL(RA, RE, RD, RB, RC, 18);
608 SI1(RA, RE, RD, RB, RC); KL(RC, RE, RD, RB, RA, 17);
609 SI0(RC, RE, RD, RB, RA); KL(RD, RA, RE, RC, RB, 16);
610 SI7(RD, RA, RE, RC, RB); KL(RA, RC, RD, RB, RE, 15);
611 SI6(RA, RC, RD, RB, RE); KL(RD, RE, RB, RA, RC, 14);
612 SI5(RD, RE, RB, RA, RC); KL(RE, RC, RD, RB, RA, 13);
613 SI4(RE, RC, RD, RB, RA); KL(RE, RD, RA, RB, RC, 12);
614 SI3(RE, RD, RA, RB, RC); KL(RA, RE, RC, RB, RD, 11);
615 SI2(RA, RE, RC, RB, RD); KL(RE, RD, RB, RC, RA, 10);
616 SI1(RE, RD, RB, RC, RA); KL(RA, RD, RB, RC, RE, 9);
617 SI0(RA, RD, RB, RC, RE); KL(RB, RE, RD, RA, RC, 8);
618 SI7(RB, RE, RD, RA, RC); KL(RE, RA, RB, RC, RD, 7);
619 SI6(RE, RA, RB, RC, RD); KL(RB, RD, RC, RE, RA, 6);
620 SI5(RB, RD, RC, RE, RA); KL(RD, RA, RB, RC, RE, 5);
621 SI4(RD, RA, RB, RC, RE); KL(RD, RB, RE, RC, RA, 4);
622 SI3(RD, RB, RE, RC, RA); KL(RE, RD, RA, RC, RB, 3);
623 SI2(RE, RD, RA, RC, RB); KL(RD, RB, RC, RA, RE, 2);
624 SI1(RD, RB, RC, RA, RE); KL(RE, RB, RC, RA, RD, 1);
625 SI0(RE, RB, RC, RA, RD); K(RC, RD, RB, RE, RA, 0);
627 movl arg_dst(%esp), %eax;
628 write_blocks(%eax, RC, RD, RB, RE, RT0, RT1, RA);
630 ret;
631 ENDPROC(serpent_dec_blk_4way)