2 * Twofish Cipher 3-way parallel algorithm (x86_64)
4 * Copyright (C) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
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.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
23 #include <linux/linkage.h>
25 .file "twofish-x86_64-asm-3way.S"
28 /* structure of crypto context */
36 /**********************************************************************
38 **********************************************************************/
88 #define do16bit_ror(rot, op1, op2, T0, T1, tmp1, tmp2, ab, dst) \
89 movzbl ab ## bl, tmp2 ## d; \
90 movzbl ab ## bh, tmp1 ## d; \
92 op1##l T0(CTX, tmp2, 4), dst ## d; \
93 op2##l T1(CTX, tmp1, 4), dst ## d;
96 * Combined G1 & G2 function. Reordered with help of rotates to have moves
99 #define g1g2_3(ab, cd, Tx0, Tx1, Tx2, Tx3, Ty0, Ty1, Ty2, Ty3, x, y) \
101 do16bit_ror(32, mov, xor, Tx0, Tx1, RT0, x ## 0, ab ## 0, x ## 0); \
102 do16bit_ror(48, mov, xor, Ty1, Ty2, RT0, y ## 0, ab ## 0, y ## 0); \
104 do16bit_ror(32, mov, xor, Tx0, Tx1, RT0, x ## 1, ab ## 1, x ## 1); \
105 do16bit_ror(48, mov, xor, Ty1, Ty2, RT0, y ## 1, ab ## 1, y ## 1); \
107 do16bit_ror(32, mov, xor, Tx0, Tx1, RT0, x ## 2, ab ## 2, x ## 2); \
108 do16bit_ror(48, mov, xor, Ty1, Ty2, RT0, y ## 2, ab ## 2, y ## 2); \
111 do16bit_ror(32, xor, xor, Tx2, Tx3, RT0, RT1, ab ## 0, x ## 0); \
112 do16bit_ror(16, xor, xor, Ty3, Ty0, RT0, RT1, ab ## 0, y ## 0); \
113 xchgq cd ## 0, ab ## 0; \
115 do16bit_ror(32, xor, xor, Tx2, Tx3, RT0, RT1, ab ## 1, x ## 1); \
116 do16bit_ror(16, xor, xor, Ty3, Ty0, RT0, RT1, ab ## 1, y ## 1); \
117 xchgq cd ## 1, ab ## 1; \
119 do16bit_ror(32, xor, xor, Tx2, Tx3, RT0, RT1, ab ## 2, x ## 2); \
120 do16bit_ror(16, xor, xor, Ty3, Ty0, RT0, RT1, ab ## 2, y ## 2); \
121 xchgq cd ## 2, ab ## 2;
123 #define enc_round_end(ab, x, y, n) \
124 addl y ## d, x ## d; \
125 addl x ## d, y ## d; \
126 addl k+4*(2*(n))(CTX), x ## d; \
127 xorl ab ## d, x ## d; \
128 addl k+4*(2*(n)+1)(CTX), y ## d; \
131 xorl y ## d, ab ## d; \
136 #define dec_round_end(ba, x, y, n) \
137 addl y ## d, x ## d; \
138 addl x ## d, y ## d; \
139 addl k+4*(2*(n))(CTX), x ## d; \
140 addl k+4*(2*(n)+1)(CTX), y ## d; \
141 xorl ba ## d, y ## d; \
144 xorl x ## d, ba ## d; \
149 #define encrypt_round3(ab, cd, n) \
150 g1g2_3(ab, cd, s0, s1, s2, s3, s0, s1, s2, s3, RX, RY); \
152 enc_round_end(ab ## 0, RX0, RY0, n); \
153 enc_round_end(ab ## 1, RX1, RY1, n); \
154 enc_round_end(ab ## 2, RX2, RY2, n);
156 #define decrypt_round3(ba, dc, n) \
157 g1g2_3(ba, dc, s1, s2, s3, s0, s3, s0, s1, s2, RY, RX); \
159 dec_round_end(ba ## 0, RX0, RY0, n); \
160 dec_round_end(ba ## 1, RX1, RY1, n); \
161 dec_round_end(ba ## 2, RX2, RY2, n);
163 #define encrypt_cycle3(ab, cd, n) \
164 encrypt_round3(ab, cd, n*2); \
165 encrypt_round3(ab, cd, (n*2)+1);
167 #define decrypt_cycle3(ba, dc, n) \
168 decrypt_round3(ba, dc, (n*2)+1); \
169 decrypt_round3(ba, dc, (n*2));
171 #define inpack3(in, n, xy, m) \
172 movq 4*(n)(in), xy ## 0; \
173 xorq w+4*m(CTX), xy ## 0; \
175 movq 4*(4+(n))(in), xy ## 1; \
176 xorq w+4*m(CTX), xy ## 1; \
178 movq 4*(8+(n))(in), xy ## 2; \
179 xorq w+4*m(CTX), xy ## 2;
181 #define outunpack3(op, out, n, xy, m) \
182 xorq w+4*m(CTX), xy ## 0; \
183 op ## q xy ## 0, 4*(n)(out); \
185 xorq w+4*m(CTX), xy ## 1; \
186 op ## q xy ## 1, 4*(4+(n))(out); \
188 xorq w+4*m(CTX), xy ## 2; \
189 op ## q xy ## 2, 4*(8+(n))(out);
191 #define inpack_enc3() \
192 inpack3(RIO, 0, RAB, 0); \
193 inpack3(RIO, 2, RCD, 2);
195 #define outunpack_enc3(op) \
196 outunpack3(op, RIO, 2, RAB, 6); \
197 outunpack3(op, RIO, 0, RCD, 4);
199 #define inpack_dec3() \
200 inpack3(RIO, 0, RAB, 4); \
204 inpack3(RIO, 2, RCD, 6); \
209 #define outunpack_dec3() \
213 outunpack3(mov, RIO, 0, RCD, 0); \
217 outunpack3(mov, RIO, 2, RAB, 2);
219 ENTRY(__twofish_enc_blk_3way)
224 * %rcx: bool, if true: xor output
233 pushq %rcx; /* bool xor */
234 pushq %rsi; /* dst */
238 encrypt_cycle3(RAB, RCD, 0);
239 encrypt_cycle3(RAB, RCD, 1);
240 encrypt_cycle3(RAB, RCD, 2);
241 encrypt_cycle3(RAB, RCD, 3);
242 encrypt_cycle3(RAB, RCD, 4);
243 encrypt_cycle3(RAB, RCD, 5);
244 encrypt_cycle3(RAB, RCD, 6);
245 encrypt_cycle3(RAB, RCD, 7);
248 popq %rbp; /* bool xor */
273 ENDPROC(__twofish_enc_blk_3way)
275 ENTRY(twofish_dec_blk_3way)
288 pushq %rsi; /* dst */
292 decrypt_cycle3(RAB, RCD, 7);
293 decrypt_cycle3(RAB, RCD, 6);
294 decrypt_cycle3(RAB, RCD, 5);
295 decrypt_cycle3(RAB, RCD, 4);
296 decrypt_cycle3(RAB, RCD, 3);
297 decrypt_cycle3(RAB, RCD, 2);
298 decrypt_cycle3(RAB, RCD, 1);
299 decrypt_cycle3(RAB, RCD, 0);
312 ENDPROC(twofish_dec_blk_3way)