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4ea1277d JG |
1 | /* |
2 | * Cast6 Cipher 8-way parallel algorithm (AVX/x86_64) | |
3 | * | |
4 | * Copyright (C) 2012 Johannes Goetzfried | |
5 | * <Johannes.Goetzfried@informatik.stud.uni-erlangen.de> | |
6 | * | |
70177286 | 7 | * Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi> |
c09220e1 | 8 | * |
4ea1277d JG |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | * | |
24 | */ | |
25 | ||
1985fecf | 26 | #include <linux/linkage.h> |
8691ccd7 | 27 | #include <asm/frame.h> |
cba1cce0 JK |
28 | #include "glue_helper-asm-avx.S" |
29 | ||
4ea1277d | 30 | .file "cast6-avx-x86_64-asm_64.S" |
4ea1277d | 31 | |
044ab525 JK |
32 | .extern cast_s1 |
33 | .extern cast_s2 | |
34 | .extern cast_s3 | |
35 | .extern cast_s4 | |
4ea1277d JG |
36 | |
37 | /* structure of crypto context */ | |
38 | #define km 0 | |
39 | #define kr (12*4*4) | |
40 | ||
41 | /* s-boxes */ | |
044ab525 JK |
42 | #define s1 cast_s1 |
43 | #define s2 cast_s2 | |
44 | #define s3 cast_s3 | |
45 | #define s4 cast_s4 | |
4ea1277d JG |
46 | |
47 | /********************************************************************** | |
48 | 8-way AVX cast6 | |
49 | **********************************************************************/ | |
50 | #define CTX %rdi | |
51 | ||
52 | #define RA1 %xmm0 | |
53 | #define RB1 %xmm1 | |
54 | #define RC1 %xmm2 | |
55 | #define RD1 %xmm3 | |
56 | ||
57 | #define RA2 %xmm4 | |
58 | #define RB2 %xmm5 | |
59 | #define RC2 %xmm6 | |
60 | #define RD2 %xmm7 | |
61 | ||
c09220e1 | 62 | #define RX %xmm8 |
4ea1277d JG |
63 | |
64 | #define RKM %xmm9 | |
c09220e1 JK |
65 | #define RKR %xmm10 |
66 | #define RKRF %xmm11 | |
67 | #define RKRR %xmm12 | |
68 | #define R32 %xmm13 | |
69 | #define R1ST %xmm14 | |
4ea1277d | 70 | |
c09220e1 | 71 | #define RTMP %xmm15 |
4ea1277d | 72 | |
c09220e1 JK |
73 | #define RID1 %rbp |
74 | #define RID1d %ebp | |
75 | #define RID2 %rsi | |
76 | #define RID2d %esi | |
4ea1277d JG |
77 | |
78 | #define RGI1 %rdx | |
79 | #define RGI1bl %dl | |
80 | #define RGI1bh %dh | |
81 | #define RGI2 %rcx | |
82 | #define RGI2bl %cl | |
83 | #define RGI2bh %ch | |
84 | ||
c09220e1 JK |
85 | #define RGI3 %rax |
86 | #define RGI3bl %al | |
87 | #define RGI3bh %ah | |
88 | #define RGI4 %rbx | |
89 | #define RGI4bl %bl | |
90 | #define RGI4bh %bh | |
91 | ||
4ea1277d JG |
92 | #define RFS1 %r8 |
93 | #define RFS1d %r8d | |
94 | #define RFS2 %r9 | |
95 | #define RFS2d %r9d | |
96 | #define RFS3 %r10 | |
97 | #define RFS3d %r10d | |
98 | ||
99 | ||
c09220e1 JK |
100 | #define lookup_32bit(src, dst, op1, op2, op3, interleave_op, il_reg) \ |
101 | movzbl src ## bh, RID1d; \ | |
102 | movzbl src ## bl, RID2d; \ | |
103 | shrq $16, src; \ | |
4ea1277d JG |
104 | movl s1(, RID1, 4), dst ## d; \ |
105 | op1 s2(, RID2, 4), dst ## d; \ | |
c09220e1 JK |
106 | movzbl src ## bh, RID1d; \ |
107 | movzbl src ## bl, RID2d; \ | |
108 | interleave_op(il_reg); \ | |
4ea1277d JG |
109 | op2 s3(, RID1, 4), dst ## d; \ |
110 | op3 s4(, RID2, 4), dst ## d; | |
111 | ||
c09220e1 JK |
112 | #define dummy(d) /* do nothing */ |
113 | ||
114 | #define shr_next(reg) \ | |
115 | shrq $16, reg; | |
116 | ||
117 | #define F_head(a, x, gi1, gi2, op0) \ | |
4ea1277d | 118 | op0 a, RKM, x; \ |
c09220e1 JK |
119 | vpslld RKRF, x, RTMP; \ |
120 | vpsrld RKRR, x, x; \ | |
4ea1277d JG |
121 | vpor RTMP, x, x; \ |
122 | \ | |
c09220e1 JK |
123 | vmovq x, gi1; \ |
124 | vpextrq $1, x, gi2; | |
125 | ||
126 | #define F_tail(a, x, gi1, gi2, op1, op2, op3) \ | |
127 | lookup_32bit(##gi1, RFS1, op1, op2, op3, shr_next, ##gi1); \ | |
128 | lookup_32bit(##gi2, RFS3, op1, op2, op3, shr_next, ##gi2); \ | |
4ea1277d | 129 | \ |
c09220e1 JK |
130 | lookup_32bit(##gi1, RFS2, op1, op2, op3, dummy, none); \ |
131 | shlq $32, RFS2; \ | |
132 | orq RFS1, RFS2; \ | |
133 | lookup_32bit(##gi2, RFS1, op1, op2, op3, dummy, none); \ | |
134 | shlq $32, RFS1; \ | |
135 | orq RFS1, RFS3; \ | |
4ea1277d | 136 | \ |
c09220e1 | 137 | vmovq RFS2, x; \ |
4ea1277d JG |
138 | vpinsrq $1, RFS3, x, x; |
139 | ||
c09220e1 JK |
140 | #define F_2(a1, b1, a2, b2, op0, op1, op2, op3) \ |
141 | F_head(b1, RX, RGI1, RGI2, op0); \ | |
142 | F_head(b2, RX, RGI3, RGI4, op0); \ | |
143 | \ | |
144 | F_tail(b1, RX, RGI1, RGI2, op1, op2, op3); \ | |
145 | F_tail(b2, RTMP, RGI3, RGI4, op1, op2, op3); \ | |
146 | \ | |
147 | vpxor a1, RX, a1; \ | |
148 | vpxor a2, RTMP, a2; | |
149 | ||
150 | #define F1_2(a1, b1, a2, b2) \ | |
151 | F_2(a1, b1, a2, b2, vpaddd, xorl, subl, addl) | |
152 | #define F2_2(a1, b1, a2, b2) \ | |
153 | F_2(a1, b1, a2, b2, vpxor, subl, addl, xorl) | |
154 | #define F3_2(a1, b1, a2, b2) \ | |
155 | F_2(a1, b1, a2, b2, vpsubd, addl, xorl, subl) | |
4ea1277d | 156 | |
c09220e1 JK |
157 | #define qop(in, out, f) \ |
158 | F ## f ## _2(out ## 1, in ## 1, out ## 2, in ## 2); | |
159 | ||
160 | #define get_round_keys(nn) \ | |
161 | vbroadcastss (km+(4*(nn)))(CTX), RKM; \ | |
162 | vpand R1ST, RKR, RKRF; \ | |
163 | vpsubq RKRF, R32, RKRR; \ | |
164 | vpsrldq $1, RKR, RKR; | |
4ea1277d JG |
165 | |
166 | #define Q(n) \ | |
c09220e1 JK |
167 | get_round_keys(4*n+0); \ |
168 | qop(RD, RC, 1); \ | |
4ea1277d | 169 | \ |
c09220e1 JK |
170 | get_round_keys(4*n+1); \ |
171 | qop(RC, RB, 2); \ | |
4ea1277d | 172 | \ |
c09220e1 JK |
173 | get_round_keys(4*n+2); \ |
174 | qop(RB, RA, 3); \ | |
4ea1277d | 175 | \ |
c09220e1 JK |
176 | get_round_keys(4*n+3); \ |
177 | qop(RA, RD, 1); | |
4ea1277d JG |
178 | |
179 | #define QBAR(n) \ | |
c09220e1 JK |
180 | get_round_keys(4*n+3); \ |
181 | qop(RA, RD, 1); \ | |
4ea1277d | 182 | \ |
c09220e1 JK |
183 | get_round_keys(4*n+2); \ |
184 | qop(RB, RA, 3); \ | |
4ea1277d | 185 | \ |
c09220e1 JK |
186 | get_round_keys(4*n+1); \ |
187 | qop(RC, RB, 2); \ | |
4ea1277d | 188 | \ |
c09220e1 JK |
189 | get_round_keys(4*n+0); \ |
190 | qop(RD, RC, 1); | |
191 | ||
192 | #define shuffle(mask) \ | |
193 | vpshufb mask, RKR, RKR; | |
4ea1277d | 194 | |
c09220e1 JK |
195 | #define preload_rkr(n, do_mask, mask) \ |
196 | vbroadcastss .L16_mask, RKR; \ | |
197 | /* add 16-bit rotation to key rotations (mod 32) */ \ | |
198 | vpxor (kr+n*16)(CTX), RKR, RKR; \ | |
199 | do_mask(mask); | |
4ea1277d JG |
200 | |
201 | #define transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \ | |
202 | vpunpckldq x1, x0, t0; \ | |
203 | vpunpckhdq x1, x0, t2; \ | |
204 | vpunpckldq x3, x2, t1; \ | |
205 | vpunpckhdq x3, x2, x3; \ | |
206 | \ | |
207 | vpunpcklqdq t1, t0, x0; \ | |
208 | vpunpckhqdq t1, t0, x1; \ | |
209 | vpunpcklqdq x3, t2, x2; \ | |
210 | vpunpckhqdq x3, t2, x3; | |
211 | ||
cba1cce0 | 212 | #define inpack_blocks(x0, x1, x2, x3, t0, t1, t2, rmask) \ |
c09220e1 JK |
213 | vpshufb rmask, x0, x0; \ |
214 | vpshufb rmask, x1, x1; \ | |
215 | vpshufb rmask, x2, x2; \ | |
216 | vpshufb rmask, x3, x3; \ | |
4ea1277d JG |
217 | \ |
218 | transpose_4x4(x0, x1, x2, x3, t0, t1, t2) | |
219 | ||
cba1cce0 | 220 | #define outunpack_blocks(x0, x1, x2, x3, t0, t1, t2, rmask) \ |
4ea1277d JG |
221 | transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \ |
222 | \ | |
c09220e1 JK |
223 | vpshufb rmask, x0, x0; \ |
224 | vpshufb rmask, x1, x1; \ | |
225 | vpshufb rmask, x2, x2; \ | |
cba1cce0 | 226 | vpshufb rmask, x3, x3; |
4ea1277d | 227 | |
c09220e1 JK |
228 | .data |
229 | ||
4ea1277d | 230 | .align 16 |
70177286 JK |
231 | .Lxts_gf128mul_and_shl1_mask: |
232 | .byte 0x87, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0 | |
4ea1277d JG |
233 | .Lbswap_mask: |
234 | .byte 3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12 | |
cba1cce0 JK |
235 | .Lbswap128_mask: |
236 | .byte 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 | |
c09220e1 JK |
237 | .Lrkr_enc_Q_Q_QBAR_QBAR: |
238 | .byte 0, 1, 2, 3, 4, 5, 6, 7, 11, 10, 9, 8, 15, 14, 13, 12 | |
239 | .Lrkr_enc_QBAR_QBAR_QBAR_QBAR: | |
240 | .byte 3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12 | |
241 | .Lrkr_dec_Q_Q_Q_Q: | |
242 | .byte 12, 13, 14, 15, 8, 9, 10, 11, 4, 5, 6, 7, 0, 1, 2, 3 | |
243 | .Lrkr_dec_Q_Q_QBAR_QBAR: | |
244 | .byte 12, 13, 14, 15, 8, 9, 10, 11, 7, 6, 5, 4, 3, 2, 1, 0 | |
245 | .Lrkr_dec_QBAR_QBAR_QBAR_QBAR: | |
246 | .byte 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 | |
247 | .L16_mask: | |
248 | .byte 16, 16, 16, 16 | |
4ea1277d | 249 | .L32_mask: |
c09220e1 JK |
250 | .byte 32, 0, 0, 0 |
251 | .Lfirst_mask: | |
252 | .byte 0x1f, 0, 0, 0 | |
253 | ||
254 | .text | |
4ea1277d | 255 | |
cba1cce0 | 256 | .align 8 |
cba1cce0 | 257 | __cast6_enc_blk8: |
4ea1277d JG |
258 | /* input: |
259 | * %rdi: ctx, CTX | |
cba1cce0 JK |
260 | * RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: blocks |
261 | * output: | |
262 | * RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: encrypted blocks | |
4ea1277d JG |
263 | */ |
264 | ||
c09220e1 | 265 | pushq %rbp; |
4ea1277d | 266 | pushq %rbx; |
4ea1277d | 267 | |
c09220e1 JK |
268 | vmovdqa .Lbswap_mask, RKM; |
269 | vmovd .Lfirst_mask, R1ST; | |
270 | vmovd .L32_mask, R32; | |
4ea1277d | 271 | |
cba1cce0 JK |
272 | inpack_blocks(RA1, RB1, RC1, RD1, RTMP, RX, RKRF, RKM); |
273 | inpack_blocks(RA2, RB2, RC2, RD2, RTMP, RX, RKRF, RKM); | |
4ea1277d | 274 | |
c09220e1 | 275 | preload_rkr(0, dummy, none); |
4ea1277d JG |
276 | Q(0); |
277 | Q(1); | |
278 | Q(2); | |
279 | Q(3); | |
c09220e1 | 280 | preload_rkr(1, shuffle, .Lrkr_enc_Q_Q_QBAR_QBAR); |
4ea1277d JG |
281 | Q(4); |
282 | Q(5); | |
283 | QBAR(6); | |
284 | QBAR(7); | |
c09220e1 | 285 | preload_rkr(2, shuffle, .Lrkr_enc_QBAR_QBAR_QBAR_QBAR); |
4ea1277d JG |
286 | QBAR(8); |
287 | QBAR(9); | |
288 | QBAR(10); | |
289 | QBAR(11); | |
290 | ||
4ea1277d | 291 | popq %rbx; |
c09220e1 | 292 | popq %rbp; |
4ea1277d | 293 | |
c09220e1 | 294 | vmovdqa .Lbswap_mask, RKM; |
4ea1277d | 295 | |
cba1cce0 JK |
296 | outunpack_blocks(RA1, RB1, RC1, RD1, RTMP, RX, RKRF, RKM); |
297 | outunpack_blocks(RA2, RB2, RC2, RD2, RTMP, RX, RKRF, RKM); | |
4ea1277d JG |
298 | |
299 | ret; | |
1985fecf | 300 | ENDPROC(__cast6_enc_blk8) |
4ea1277d | 301 | |
cba1cce0 | 302 | .align 8 |
cba1cce0 | 303 | __cast6_dec_blk8: |
4ea1277d JG |
304 | /* input: |
305 | * %rdi: ctx, CTX | |
cba1cce0 JK |
306 | * RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: encrypted blocks |
307 | * output: | |
308 | * RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: decrypted blocks | |
4ea1277d JG |
309 | */ |
310 | ||
c09220e1 | 311 | pushq %rbp; |
4ea1277d JG |
312 | pushq %rbx; |
313 | ||
c09220e1 JK |
314 | vmovdqa .Lbswap_mask, RKM; |
315 | vmovd .Lfirst_mask, R1ST; | |
316 | vmovd .L32_mask, R32; | |
4ea1277d | 317 | |
cba1cce0 JK |
318 | inpack_blocks(RA1, RB1, RC1, RD1, RTMP, RX, RKRF, RKM); |
319 | inpack_blocks(RA2, RB2, RC2, RD2, RTMP, RX, RKRF, RKM); | |
4ea1277d | 320 | |
c09220e1 | 321 | preload_rkr(2, shuffle, .Lrkr_dec_Q_Q_Q_Q); |
4ea1277d JG |
322 | Q(11); |
323 | Q(10); | |
324 | Q(9); | |
325 | Q(8); | |
c09220e1 | 326 | preload_rkr(1, shuffle, .Lrkr_dec_Q_Q_QBAR_QBAR); |
4ea1277d JG |
327 | Q(7); |
328 | Q(6); | |
329 | QBAR(5); | |
330 | QBAR(4); | |
c09220e1 | 331 | preload_rkr(0, shuffle, .Lrkr_dec_QBAR_QBAR_QBAR_QBAR); |
4ea1277d JG |
332 | QBAR(3); |
333 | QBAR(2); | |
334 | QBAR(1); | |
335 | QBAR(0); | |
336 | ||
337 | popq %rbx; | |
c09220e1 | 338 | popq %rbp; |
4ea1277d | 339 | |
c09220e1 | 340 | vmovdqa .Lbswap_mask, RKM; |
cba1cce0 JK |
341 | outunpack_blocks(RA1, RB1, RC1, RD1, RTMP, RX, RKRF, RKM); |
342 | outunpack_blocks(RA2, RB2, RC2, RD2, RTMP, RX, RKRF, RKM); | |
343 | ||
344 | ret; | |
1985fecf | 345 | ENDPROC(__cast6_dec_blk8) |
cba1cce0 | 346 | |
1985fecf | 347 | ENTRY(cast6_ecb_enc_8way) |
cba1cce0 JK |
348 | /* input: |
349 | * %rdi: ctx, CTX | |
350 | * %rsi: dst | |
351 | * %rdx: src | |
352 | */ | |
8691ccd7 | 353 | FRAME_BEGIN |
cba1cce0 JK |
354 | |
355 | movq %rsi, %r11; | |
356 | ||
357 | load_8way(%rdx, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2); | |
358 | ||
359 | call __cast6_enc_blk8; | |
360 | ||
361 | store_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2); | |
362 | ||
8691ccd7 | 363 | FRAME_END |
cba1cce0 | 364 | ret; |
1985fecf | 365 | ENDPROC(cast6_ecb_enc_8way) |
cba1cce0 | 366 | |
1985fecf | 367 | ENTRY(cast6_ecb_dec_8way) |
cba1cce0 JK |
368 | /* input: |
369 | * %rdi: ctx, CTX | |
370 | * %rsi: dst | |
371 | * %rdx: src | |
372 | */ | |
8691ccd7 | 373 | FRAME_BEGIN |
cba1cce0 JK |
374 | |
375 | movq %rsi, %r11; | |
376 | ||
377 | load_8way(%rdx, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2); | |
378 | ||
379 | call __cast6_dec_blk8; | |
380 | ||
381 | store_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2); | |
382 | ||
8691ccd7 | 383 | FRAME_END |
cba1cce0 | 384 | ret; |
1985fecf | 385 | ENDPROC(cast6_ecb_dec_8way) |
cba1cce0 | 386 | |
1985fecf | 387 | ENTRY(cast6_cbc_dec_8way) |
cba1cce0 JK |
388 | /* input: |
389 | * %rdi: ctx, CTX | |
390 | * %rsi: dst | |
391 | * %rdx: src | |
392 | */ | |
8691ccd7 | 393 | FRAME_BEGIN |
cba1cce0 JK |
394 | |
395 | pushq %r12; | |
396 | ||
397 | movq %rsi, %r11; | |
398 | movq %rdx, %r12; | |
399 | ||
400 | load_8way(%rdx, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2); | |
401 | ||
402 | call __cast6_dec_blk8; | |
403 | ||
404 | store_cbc_8way(%r12, %r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2); | |
405 | ||
406 | popq %r12; | |
407 | ||
8691ccd7 | 408 | FRAME_END |
cba1cce0 | 409 | ret; |
1985fecf | 410 | ENDPROC(cast6_cbc_dec_8way) |
cba1cce0 | 411 | |
1985fecf | 412 | ENTRY(cast6_ctr_8way) |
cba1cce0 JK |
413 | /* input: |
414 | * %rdi: ctx, CTX | |
415 | * %rsi: dst | |
416 | * %rdx: src | |
417 | * %rcx: iv (little endian, 128bit) | |
418 | */ | |
8691ccd7 | 419 | FRAME_BEGIN |
cba1cce0 JK |
420 | |
421 | pushq %r12; | |
422 | ||
423 | movq %rsi, %r11; | |
424 | movq %rdx, %r12; | |
425 | ||
426 | load_ctr_8way(%rcx, .Lbswap128_mask, RA1, RB1, RC1, RD1, RA2, RB2, RC2, | |
427 | RD2, RX, RKR, RKM); | |
428 | ||
429 | call __cast6_enc_blk8; | |
430 | ||
431 | store_ctr_8way(%r12, %r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2); | |
432 | ||
433 | popq %r12; | |
4ea1277d | 434 | |
8691ccd7 | 435 | FRAME_END |
4ea1277d | 436 | ret; |
1985fecf | 437 | ENDPROC(cast6_ctr_8way) |
70177286 JK |
438 | |
439 | ENTRY(cast6_xts_enc_8way) | |
440 | /* input: | |
441 | * %rdi: ctx, CTX | |
442 | * %rsi: dst | |
443 | * %rdx: src | |
444 | * %rcx: iv (t ⊕ αⁿ ∈ GF(2¹²⁸)) | |
445 | */ | |
8691ccd7 | 446 | FRAME_BEGIN |
70177286 JK |
447 | |
448 | movq %rsi, %r11; | |
449 | ||
450 | /* regs <= src, dst <= IVs, regs <= regs xor IVs */ | |
451 | load_xts_8way(%rcx, %rdx, %rsi, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2, | |
452 | RX, RKR, RKM, .Lxts_gf128mul_and_shl1_mask); | |
453 | ||
454 | call __cast6_enc_blk8; | |
455 | ||
456 | /* dst <= regs xor IVs(in dst) */ | |
457 | store_xts_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2); | |
458 | ||
8691ccd7 | 459 | FRAME_END |
70177286 JK |
460 | ret; |
461 | ENDPROC(cast6_xts_enc_8way) | |
462 | ||
463 | ENTRY(cast6_xts_dec_8way) | |
464 | /* input: | |
465 | * %rdi: ctx, CTX | |
466 | * %rsi: dst | |
467 | * %rdx: src | |
468 | * %rcx: iv (t ⊕ αⁿ ∈ GF(2¹²⁸)) | |
469 | */ | |
8691ccd7 | 470 | FRAME_BEGIN |
70177286 JK |
471 | |
472 | movq %rsi, %r11; | |
473 | ||
474 | /* regs <= src, dst <= IVs, regs <= regs xor IVs */ | |
475 | load_xts_8way(%rcx, %rdx, %rsi, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2, | |
476 | RX, RKR, RKM, .Lxts_gf128mul_and_shl1_mask); | |
477 | ||
478 | call __cast6_dec_blk8; | |
479 | ||
480 | /* dst <= regs xor IVs(in dst) */ | |
481 | store_xts_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2); | |
482 | ||
8691ccd7 | 483 | FRAME_END |
70177286 JK |
484 | ret; |
485 | ENDPROC(cast6_xts_dec_8way) |