Johannes Goetzfried | 107778b | 2012-05-28 15:54:24 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Twofish Cipher 8-way parallel algorithm (AVX/x86_64) |
| 3 | * |
| 4 | * Copyright (C) 2012 Johannes Goetzfried |
| 5 | * <Johannes.Goetzfried@informatik.stud.uni-erlangen.de> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 20 | * USA |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | .file "twofish-avx-x86_64-asm_64.S" |
| 25 | .text |
| 26 | |
| 27 | /* structure of crypto context */ |
| 28 | #define s0 0 |
| 29 | #define s1 1024 |
| 30 | #define s2 2048 |
| 31 | #define s3 3072 |
| 32 | #define w 4096 |
| 33 | #define k 4128 |
| 34 | |
| 35 | /********************************************************************** |
| 36 | 8-way AVX twofish |
| 37 | **********************************************************************/ |
| 38 | #define CTX %rdi |
| 39 | |
| 40 | #define RA1 %xmm0 |
| 41 | #define RB1 %xmm1 |
| 42 | #define RC1 %xmm2 |
| 43 | #define RD1 %xmm3 |
| 44 | |
| 45 | #define RA2 %xmm4 |
| 46 | #define RB2 %xmm5 |
| 47 | #define RC2 %xmm6 |
| 48 | #define RD2 %xmm7 |
| 49 | |
| 50 | #define RX %xmm8 |
| 51 | #define RY %xmm9 |
| 52 | |
| 53 | #define RK1 %xmm10 |
| 54 | #define RK2 %xmm11 |
| 55 | |
| 56 | #define RID1 %rax |
| 57 | #define RID1b %al |
| 58 | #define RID2 %rbx |
| 59 | #define RID2b %bl |
| 60 | |
| 61 | #define RGI1 %rdx |
| 62 | #define RGI1bl %dl |
| 63 | #define RGI1bh %dh |
| 64 | #define RGI2 %rcx |
| 65 | #define RGI2bl %cl |
| 66 | #define RGI2bh %ch |
| 67 | |
| 68 | #define RGS1 %r8 |
| 69 | #define RGS1d %r8d |
| 70 | #define RGS2 %r9 |
| 71 | #define RGS2d %r9d |
| 72 | #define RGS3 %r10 |
| 73 | #define RGS3d %r10d |
| 74 | |
| 75 | |
| 76 | #define lookup_32bit(t0, t1, t2, t3, src, dst) \ |
| 77 | movb src ## bl, RID1b; \ |
| 78 | movb src ## bh, RID2b; \ |
| 79 | movl t0(CTX, RID1, 4), dst ## d; \ |
| 80 | xorl t1(CTX, RID2, 4), dst ## d; \ |
| 81 | shrq $16, src; \ |
| 82 | movb src ## bl, RID1b; \ |
| 83 | movb src ## bh, RID2b; \ |
| 84 | xorl t2(CTX, RID1, 4), dst ## d; \ |
| 85 | xorl t3(CTX, RID2, 4), dst ## d; |
| 86 | |
| 87 | #define G(a, x, t0, t1, t2, t3) \ |
| 88 | vmovq a, RGI1; \ |
| 89 | vpsrldq $8, a, x; \ |
| 90 | vmovq x, RGI2; \ |
| 91 | \ |
| 92 | lookup_32bit(t0, t1, t2, t3, RGI1, RGS1); \ |
| 93 | shrq $16, RGI1; \ |
| 94 | lookup_32bit(t0, t1, t2, t3, RGI1, RGS2); \ |
| 95 | shlq $32, RGS2; \ |
| 96 | orq RGS1, RGS2; \ |
| 97 | \ |
| 98 | lookup_32bit(t0, t1, t2, t3, RGI2, RGS1); \ |
| 99 | shrq $16, RGI2; \ |
| 100 | lookup_32bit(t0, t1, t2, t3, RGI2, RGS3); \ |
| 101 | shlq $32, RGS3; \ |
| 102 | orq RGS1, RGS3; \ |
| 103 | \ |
| 104 | vmovq RGS2, x; \ |
| 105 | vpinsrq $1, RGS3, x, x; |
| 106 | |
| 107 | #define encround(a, b, c, d, x, y) \ |
| 108 | G(a, x, s0, s1, s2, s3); \ |
| 109 | G(b, y, s1, s2, s3, s0); \ |
| 110 | vpaddd x, y, x; \ |
| 111 | vpaddd y, x, y; \ |
| 112 | vpaddd x, RK1, x; \ |
| 113 | vpaddd y, RK2, y; \ |
| 114 | vpxor x, c, c; \ |
| 115 | vpsrld $1, c, x; \ |
| 116 | vpslld $(32 - 1), c, c; \ |
| 117 | vpor c, x, c; \ |
| 118 | vpslld $1, d, x; \ |
| 119 | vpsrld $(32 - 1), d, d; \ |
| 120 | vpor d, x, d; \ |
| 121 | vpxor d, y, d; |
| 122 | |
| 123 | #define decround(a, b, c, d, x, y) \ |
| 124 | G(a, x, s0, s1, s2, s3); \ |
| 125 | G(b, y, s1, s2, s3, s0); \ |
| 126 | vpaddd x, y, x; \ |
| 127 | vpaddd y, x, y; \ |
| 128 | vpaddd y, RK2, y; \ |
| 129 | vpxor d, y, d; \ |
| 130 | vpsrld $1, d, y; \ |
| 131 | vpslld $(32 - 1), d, d; \ |
| 132 | vpor d, y, d; \ |
| 133 | vpslld $1, c, y; \ |
| 134 | vpsrld $(32 - 1), c, c; \ |
| 135 | vpor c, y, c; \ |
| 136 | vpaddd x, RK1, x; \ |
| 137 | vpxor x, c, c; |
| 138 | |
| 139 | #define encrypt_round(n, a, b, c, d) \ |
| 140 | vbroadcastss (k+4*(2*(n)))(CTX), RK1; \ |
| 141 | vbroadcastss (k+4*(2*(n)+1))(CTX), RK2; \ |
| 142 | encround(a ## 1, b ## 1, c ## 1, d ## 1, RX, RY); \ |
| 143 | encround(a ## 2, b ## 2, c ## 2, d ## 2, RX, RY); |
| 144 | |
| 145 | #define decrypt_round(n, a, b, c, d) \ |
| 146 | vbroadcastss (k+4*(2*(n)))(CTX), RK1; \ |
| 147 | vbroadcastss (k+4*(2*(n)+1))(CTX), RK2; \ |
| 148 | decround(a ## 1, b ## 1, c ## 1, d ## 1, RX, RY); \ |
| 149 | decround(a ## 2, b ## 2, c ## 2, d ## 2, RX, RY); |
| 150 | |
| 151 | #define encrypt_cycle(n) \ |
| 152 | encrypt_round((2*n), RA, RB, RC, RD); \ |
| 153 | encrypt_round(((2*n) + 1), RC, RD, RA, RB); |
| 154 | |
| 155 | #define decrypt_cycle(n) \ |
| 156 | decrypt_round(((2*n) + 1), RC, RD, RA, RB); \ |
| 157 | decrypt_round((2*n), RA, RB, RC, RD); |
| 158 | |
| 159 | |
| 160 | #define transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \ |
| 161 | vpunpckldq x1, x0, t0; \ |
| 162 | vpunpckhdq x1, x0, t2; \ |
| 163 | vpunpckldq x3, x2, t1; \ |
| 164 | vpunpckhdq x3, x2, x3; \ |
| 165 | \ |
| 166 | vpunpcklqdq t1, t0, x0; \ |
| 167 | vpunpckhqdq t1, t0, x1; \ |
| 168 | vpunpcklqdq x3, t2, x2; \ |
| 169 | vpunpckhqdq x3, t2, x3; |
| 170 | |
| 171 | #define inpack_blocks(in, x0, x1, x2, x3, wkey, t0, t1, t2) \ |
| 172 | vpxor (0*4*4)(in), wkey, x0; \ |
| 173 | vpxor (1*4*4)(in), wkey, x1; \ |
| 174 | vpxor (2*4*4)(in), wkey, x2; \ |
| 175 | vpxor (3*4*4)(in), wkey, x3; \ |
| 176 | \ |
| 177 | transpose_4x4(x0, x1, x2, x3, t0, t1, t2) |
| 178 | |
| 179 | #define outunpack_blocks(out, x0, x1, x2, x3, wkey, t0, t1, t2) \ |
| 180 | transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \ |
| 181 | \ |
| 182 | vpxor x0, wkey, x0; \ |
| 183 | vmovdqu x0, (0*4*4)(out); \ |
| 184 | vpxor x1, wkey, x1; \ |
| 185 | vmovdqu x1, (1*4*4)(out); \ |
| 186 | vpxor x2, wkey, x2; \ |
| 187 | vmovdqu x2, (2*4*4)(out); \ |
| 188 | vpxor x3, wkey, x3; \ |
| 189 | vmovdqu x3, (3*4*4)(out); |
| 190 | |
| 191 | #define outunpack_xor_blocks(out, x0, x1, x2, x3, wkey, t0, t1, t2) \ |
| 192 | transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \ |
| 193 | \ |
| 194 | vpxor x0, wkey, x0; \ |
| 195 | vpxor (0*4*4)(out), x0, x0; \ |
| 196 | vmovdqu x0, (0*4*4)(out); \ |
| 197 | vpxor x1, wkey, x1; \ |
| 198 | vpxor (1*4*4)(out), x1, x1; \ |
| 199 | vmovdqu x1, (1*4*4)(out); \ |
| 200 | vpxor x2, wkey, x2; \ |
| 201 | vpxor (2*4*4)(out), x2, x2; \ |
| 202 | vmovdqu x2, (2*4*4)(out); \ |
| 203 | vpxor x3, wkey, x3; \ |
| 204 | vpxor (3*4*4)(out), x3, x3; \ |
| 205 | vmovdqu x3, (3*4*4)(out); |
| 206 | |
| 207 | .align 8 |
| 208 | .global __twofish_enc_blk_8way |
| 209 | .type __twofish_enc_blk_8way,@function; |
| 210 | |
| 211 | __twofish_enc_blk_8way: |
| 212 | /* input: |
| 213 | * %rdi: ctx, CTX |
| 214 | * %rsi: dst |
| 215 | * %rdx: src |
| 216 | * %rcx: bool, if true: xor output |
| 217 | */ |
| 218 | |
| 219 | pushq %rbx; |
| 220 | pushq %rcx; |
| 221 | |
| 222 | vmovdqu w(CTX), RK1; |
| 223 | |
| 224 | leaq (4*4*4)(%rdx), %rax; |
| 225 | inpack_blocks(%rdx, RA1, RB1, RC1, RD1, RK1, RX, RY, RK2); |
| 226 | inpack_blocks(%rax, RA2, RB2, RC2, RD2, RK1, RX, RY, RK2); |
| 227 | |
| 228 | xorq RID1, RID1; |
| 229 | xorq RID2, RID2; |
| 230 | |
| 231 | encrypt_cycle(0); |
| 232 | encrypt_cycle(1); |
| 233 | encrypt_cycle(2); |
| 234 | encrypt_cycle(3); |
| 235 | encrypt_cycle(4); |
| 236 | encrypt_cycle(5); |
| 237 | encrypt_cycle(6); |
| 238 | encrypt_cycle(7); |
| 239 | |
| 240 | vmovdqu (w+4*4)(CTX), RK1; |
| 241 | |
| 242 | popq %rcx; |
| 243 | popq %rbx; |
| 244 | |
| 245 | leaq (4*4*4)(%rsi), %rax; |
Johannes Goetzfried | 107778b | 2012-05-28 15:54:24 +0200 | [diff] [blame] | 246 | |
| 247 | testb %cl, %cl; |
| 248 | jnz __enc_xor8; |
| 249 | |
| 250 | outunpack_blocks(%rsi, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2); |
| 251 | outunpack_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2); |
| 252 | |
| 253 | ret; |
| 254 | |
| 255 | __enc_xor8: |
| 256 | outunpack_xor_blocks(%rsi, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2); |
| 257 | outunpack_xor_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2); |
| 258 | |
| 259 | ret; |
| 260 | |
| 261 | .align 8 |
| 262 | .global twofish_dec_blk_8way |
| 263 | .type twofish_dec_blk_8way,@function; |
| 264 | |
| 265 | twofish_dec_blk_8way: |
| 266 | /* input: |
| 267 | * %rdi: ctx, CTX |
| 268 | * %rsi: dst |
| 269 | * %rdx: src |
| 270 | */ |
| 271 | |
| 272 | pushq %rbx; |
| 273 | |
| 274 | vmovdqu (w+4*4)(CTX), RK1; |
| 275 | |
| 276 | leaq (4*4*4)(%rdx), %rax; |
| 277 | inpack_blocks(%rdx, RC1, RD1, RA1, RB1, RK1, RX, RY, RK2); |
| 278 | inpack_blocks(%rax, RC2, RD2, RA2, RB2, RK1, RX, RY, RK2); |
| 279 | |
| 280 | xorq RID1, RID1; |
| 281 | xorq RID2, RID2; |
| 282 | |
| 283 | decrypt_cycle(7); |
| 284 | decrypt_cycle(6); |
| 285 | decrypt_cycle(5); |
| 286 | decrypt_cycle(4); |
| 287 | decrypt_cycle(3); |
| 288 | decrypt_cycle(2); |
| 289 | decrypt_cycle(1); |
| 290 | decrypt_cycle(0); |
| 291 | |
| 292 | vmovdqu (w)(CTX), RK1; |
| 293 | |
| 294 | popq %rbx; |
| 295 | |
| 296 | leaq (4*4*4)(%rsi), %rax; |
| 297 | outunpack_blocks(%rsi, RA1, RB1, RC1, RD1, RK1, RX, RY, RK2); |
| 298 | outunpack_blocks(%rax, RA2, RB2, RC2, RD2, RK1, RX, RY, RK2); |
| 299 | |
| 300 | ret; |