/usr/share/gocode/src/golang.org/x/crypto/chacha20poly1305/chacha20poly1305_amd64.s is in golang-golang-x-crypto-dev 1:0.0~git20170629.0.5ef0053-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 | // Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// This file was originally from https://golang.org/cl/24717 by Vlad Krasnov of CloudFlare.
// +build go1.7,amd64,!gccgo,!appengine
#include "textflag.h"
// General register allocation
#define oup DI
#define inp SI
#define inl BX
#define adp CX // free to reuse, after we hash the additional data
#define keyp R8 // free to reuse, when we copy the key to stack
#define itr2 R9 // general iterator
#define itr1 CX // general iterator
#define acc0 R10
#define acc1 R11
#define acc2 R12
#define t0 R13
#define t1 R14
#define t2 R15
#define t3 R8
// Register and stack allocation for the SSE code
#define rStore (0*16)(BP)
#define sStore (1*16)(BP)
#define state1Store (2*16)(BP)
#define state2Store (3*16)(BP)
#define tmpStore (4*16)(BP)
#define ctr0Store (5*16)(BP)
#define ctr1Store (6*16)(BP)
#define ctr2Store (7*16)(BP)
#define ctr3Store (8*16)(BP)
#define A0 X0
#define A1 X1
#define A2 X2
#define B0 X3
#define B1 X4
#define B2 X5
#define C0 X6
#define C1 X7
#define C2 X8
#define D0 X9
#define D1 X10
#define D2 X11
#define T0 X12
#define T1 X13
#define T2 X14
#define T3 X15
#define A3 T0
#define B3 T1
#define C3 T2
#define D3 T3
// Register and stack allocation for the AVX2 code
#define rsStoreAVX2 (0*32)(BP)
#define state1StoreAVX2 (1*32)(BP)
#define state2StoreAVX2 (2*32)(BP)
#define ctr0StoreAVX2 (3*32)(BP)
#define ctr1StoreAVX2 (4*32)(BP)
#define ctr2StoreAVX2 (5*32)(BP)
#define ctr3StoreAVX2 (6*32)(BP)
#define tmpStoreAVX2 (7*32)(BP) // 256 bytes on stack
#define AA0 Y0
#define AA1 Y5
#define AA2 Y6
#define AA3 Y7
#define BB0 Y14
#define BB1 Y9
#define BB2 Y10
#define BB3 Y11
#define CC0 Y12
#define CC1 Y13
#define CC2 Y8
#define CC3 Y15
#define DD0 Y4
#define DD1 Y1
#define DD2 Y2
#define DD3 Y3
#define TT0 DD3
#define TT1 AA3
#define TT2 BB3
#define TT3 CC3
// ChaCha20 constants
DATA ·chacha20Constants<>+0x00(SB)/4, $0x61707865
DATA ·chacha20Constants<>+0x04(SB)/4, $0x3320646e
DATA ·chacha20Constants<>+0x08(SB)/4, $0x79622d32
DATA ·chacha20Constants<>+0x0c(SB)/4, $0x6b206574
DATA ·chacha20Constants<>+0x10(SB)/4, $0x61707865
DATA ·chacha20Constants<>+0x14(SB)/4, $0x3320646e
DATA ·chacha20Constants<>+0x18(SB)/4, $0x79622d32
DATA ·chacha20Constants<>+0x1c(SB)/4, $0x6b206574
// <<< 16 with PSHUFB
DATA ·rol16<>+0x00(SB)/8, $0x0504070601000302
DATA ·rol16<>+0x08(SB)/8, $0x0D0C0F0E09080B0A
DATA ·rol16<>+0x10(SB)/8, $0x0504070601000302
DATA ·rol16<>+0x18(SB)/8, $0x0D0C0F0E09080B0A
// <<< 8 with PSHUFB
DATA ·rol8<>+0x00(SB)/8, $0x0605040702010003
DATA ·rol8<>+0x08(SB)/8, $0x0E0D0C0F0A09080B
DATA ·rol8<>+0x10(SB)/8, $0x0605040702010003
DATA ·rol8<>+0x18(SB)/8, $0x0E0D0C0F0A09080B
DATA ·avx2InitMask<>+0x00(SB)/8, $0x0
DATA ·avx2InitMask<>+0x08(SB)/8, $0x0
DATA ·avx2InitMask<>+0x10(SB)/8, $0x1
DATA ·avx2InitMask<>+0x18(SB)/8, $0x0
DATA ·avx2IncMask<>+0x00(SB)/8, $0x2
DATA ·avx2IncMask<>+0x08(SB)/8, $0x0
DATA ·avx2IncMask<>+0x10(SB)/8, $0x2
DATA ·avx2IncMask<>+0x18(SB)/8, $0x0
// Poly1305 key clamp
DATA ·polyClampMask<>+0x00(SB)/8, $0x0FFFFFFC0FFFFFFF
DATA ·polyClampMask<>+0x08(SB)/8, $0x0FFFFFFC0FFFFFFC
DATA ·polyClampMask<>+0x10(SB)/8, $0xFFFFFFFFFFFFFFFF
DATA ·polyClampMask<>+0x18(SB)/8, $0xFFFFFFFFFFFFFFFF
DATA ·sseIncMask<>+0x00(SB)/8, $0x1
DATA ·sseIncMask<>+0x08(SB)/8, $0x0
// To load/store the last < 16 bytes in a buffer
DATA ·andMask<>+0x00(SB)/8, $0x00000000000000ff
DATA ·andMask<>+0x08(SB)/8, $0x0000000000000000
DATA ·andMask<>+0x10(SB)/8, $0x000000000000ffff
DATA ·andMask<>+0x18(SB)/8, $0x0000000000000000
DATA ·andMask<>+0x20(SB)/8, $0x0000000000ffffff
DATA ·andMask<>+0x28(SB)/8, $0x0000000000000000
DATA ·andMask<>+0x30(SB)/8, $0x00000000ffffffff
DATA ·andMask<>+0x38(SB)/8, $0x0000000000000000
DATA ·andMask<>+0x40(SB)/8, $0x000000ffffffffff
DATA ·andMask<>+0x48(SB)/8, $0x0000000000000000
DATA ·andMask<>+0x50(SB)/8, $0x0000ffffffffffff
DATA ·andMask<>+0x58(SB)/8, $0x0000000000000000
DATA ·andMask<>+0x60(SB)/8, $0x00ffffffffffffff
DATA ·andMask<>+0x68(SB)/8, $0x0000000000000000
DATA ·andMask<>+0x70(SB)/8, $0xffffffffffffffff
DATA ·andMask<>+0x78(SB)/8, $0x0000000000000000
DATA ·andMask<>+0x80(SB)/8, $0xffffffffffffffff
DATA ·andMask<>+0x88(SB)/8, $0x00000000000000ff
DATA ·andMask<>+0x90(SB)/8, $0xffffffffffffffff
DATA ·andMask<>+0x98(SB)/8, $0x000000000000ffff
DATA ·andMask<>+0xa0(SB)/8, $0xffffffffffffffff
DATA ·andMask<>+0xa8(SB)/8, $0x0000000000ffffff
DATA ·andMask<>+0xb0(SB)/8, $0xffffffffffffffff
DATA ·andMask<>+0xb8(SB)/8, $0x00000000ffffffff
DATA ·andMask<>+0xc0(SB)/8, $0xffffffffffffffff
DATA ·andMask<>+0xc8(SB)/8, $0x000000ffffffffff
DATA ·andMask<>+0xd0(SB)/8, $0xffffffffffffffff
DATA ·andMask<>+0xd8(SB)/8, $0x0000ffffffffffff
DATA ·andMask<>+0xe0(SB)/8, $0xffffffffffffffff
DATA ·andMask<>+0xe8(SB)/8, $0x00ffffffffffffff
GLOBL ·chacha20Constants<>(SB), (NOPTR+RODATA), $32
GLOBL ·rol16<>(SB), (NOPTR+RODATA), $32
GLOBL ·rol8<>(SB), (NOPTR+RODATA), $32
GLOBL ·sseIncMask<>(SB), (NOPTR+RODATA), $16
GLOBL ·avx2IncMask<>(SB), (NOPTR+RODATA), $32
GLOBL ·avx2InitMask<>(SB), (NOPTR+RODATA), $32
GLOBL ·polyClampMask<>(SB), (NOPTR+RODATA), $32
GLOBL ·andMask<>(SB), (NOPTR+RODATA), $240
// No PALIGNR in Go ASM yet (but VPALIGNR is present).
#define shiftB0Left BYTE $0x66; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xdb; BYTE $0x04 // PALIGNR $4, X3, X3
#define shiftB1Left BYTE $0x66; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xe4; BYTE $0x04 // PALIGNR $4, X4, X4
#define shiftB2Left BYTE $0x66; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xed; BYTE $0x04 // PALIGNR $4, X5, X5
#define shiftB3Left BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xed; BYTE $0x04 // PALIGNR $4, X13, X13
#define shiftC0Left BYTE $0x66; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xf6; BYTE $0x08 // PALIGNR $8, X6, X6
#define shiftC1Left BYTE $0x66; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xff; BYTE $0x08 // PALIGNR $8, X7, X7
#define shiftC2Left BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xc0; BYTE $0x08 // PALIGNR $8, X8, X8
#define shiftC3Left BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xf6; BYTE $0x08 // PALIGNR $8, X14, X14
#define shiftD0Left BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xc9; BYTE $0x0c // PALIGNR $12, X9, X9
#define shiftD1Left BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xd2; BYTE $0x0c // PALIGNR $12, X10, X10
#define shiftD2Left BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xdb; BYTE $0x0c // PALIGNR $12, X11, X11
#define shiftD3Left BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xff; BYTE $0x0c // PALIGNR $12, X15, X15
#define shiftB0Right BYTE $0x66; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xdb; BYTE $0x0c // PALIGNR $12, X3, X3
#define shiftB1Right BYTE $0x66; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xe4; BYTE $0x0c // PALIGNR $12, X4, X4
#define shiftB2Right BYTE $0x66; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xed; BYTE $0x0c // PALIGNR $12, X5, X5
#define shiftB3Right BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xed; BYTE $0x0c // PALIGNR $12, X13, X13
#define shiftC0Right shiftC0Left
#define shiftC1Right shiftC1Left
#define shiftC2Right shiftC2Left
#define shiftC3Right shiftC3Left
#define shiftD0Right BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xc9; BYTE $0x04 // PALIGNR $4, X9, X9
#define shiftD1Right BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xd2; BYTE $0x04 // PALIGNR $4, X10, X10
#define shiftD2Right BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xdb; BYTE $0x04 // PALIGNR $4, X11, X11
#define shiftD3Right BYTE $0x66; BYTE $0x45; BYTE $0x0f; BYTE $0x3a; BYTE $0x0f; BYTE $0xff; BYTE $0x04 // PALIGNR $4, X15, X15
// Some macros
#define chachaQR(A, B, C, D, T) \
PADDD B, A; PXOR A, D; PSHUFB ·rol16<>(SB), D \
PADDD D, C; PXOR C, B; MOVO B, T; PSLLL $12, T; PSRLL $20, B; PXOR T, B \
PADDD B, A; PXOR A, D; PSHUFB ·rol8<>(SB), D \
PADDD D, C; PXOR C, B; MOVO B, T; PSLLL $7, T; PSRLL $25, B; PXOR T, B
#define chachaQR_AVX2(A, B, C, D, T) \
VPADDD B, A, A; VPXOR A, D, D; VPSHUFB ·rol16<>(SB), D, D \
VPADDD D, C, C; VPXOR C, B, B; VPSLLD $12, B, T; VPSRLD $20, B, B; VPXOR T, B, B \
VPADDD B, A, A; VPXOR A, D, D; VPSHUFB ·rol8<>(SB), D, D \
VPADDD D, C, C; VPXOR C, B, B; VPSLLD $7, B, T; VPSRLD $25, B, B; VPXOR T, B, B
#define polyAdd(S) ADDQ S, acc0; ADCQ 8+S, acc1; ADCQ $1, acc2
#define polyMulStage1 MOVQ (0*8)(BP), AX; MOVQ AX, t2; MULQ acc0; MOVQ AX, t0; MOVQ DX, t1; MOVQ (0*8)(BP), AX; MULQ acc1; IMULQ acc2, t2; ADDQ AX, t1; ADCQ DX, t2
#define polyMulStage2 MOVQ (1*8)(BP), AX; MOVQ AX, t3; MULQ acc0; ADDQ AX, t1; ADCQ $0, DX; MOVQ DX, acc0; MOVQ (1*8)(BP), AX; MULQ acc1; ADDQ AX, t2; ADCQ $0, DX
#define polyMulStage3 IMULQ acc2, t3; ADDQ acc0, t2; ADCQ DX, t3
#define polyMulReduceStage MOVQ t0, acc0; MOVQ t1, acc1; MOVQ t2, acc2; ANDQ $3, acc2; MOVQ t2, t0; ANDQ $-4, t0; MOVQ t3, t1; SHRQ $2, t2:t3; SHRQ $2, t3; ADDQ t0, acc0; ADCQ t1, acc1; ADCQ $0, acc2; ADDQ t2, acc0; ADCQ t3, acc1; ADCQ $0, acc2
#define polyMulStage1_AVX2 MOVQ (0*8)(BP), DX; MOVQ DX, t2; MULXQ acc0, t0, t1; IMULQ acc2, t2; MULXQ acc1, AX, DX; ADDQ AX, t1; ADCQ DX, t2
#define polyMulStage2_AVX2 MOVQ (1*8)(BP), DX; MULXQ acc0, acc0, AX; ADDQ acc0, t1; MULXQ acc1, acc1, t3; ADCQ acc1, t2; ADCQ $0, t3
#define polyMulStage3_AVX2 IMULQ acc2, DX; ADDQ AX, t2; ADCQ DX, t3
#define polyMul polyMulStage1; polyMulStage2; polyMulStage3; polyMulReduceStage
#define polyMulAVX2 polyMulStage1_AVX2; polyMulStage2_AVX2; polyMulStage3_AVX2; polyMulReduceStage
// ----------------------------------------------------------------------------
TEXT polyHashADInternal<>(SB), NOSPLIT, $0
// adp points to beginning of additional data
// itr2 holds ad length
XORQ acc0, acc0
XORQ acc1, acc1
XORQ acc2, acc2
CMPQ itr2, $13
JNE hashADLoop
openFastTLSAD:
// Special treatment for the TLS case of 13 bytes
MOVQ (adp), acc0
MOVQ 5(adp), acc1
SHRQ $24, acc1
MOVQ $1, acc2
polyMul
RET
hashADLoop:
// Hash in 16 byte chunks
CMPQ itr2, $16
JB hashADTail
polyAdd(0(adp))
LEAQ (1*16)(adp), adp
SUBQ $16, itr2
polyMul
JMP hashADLoop
hashADTail:
CMPQ itr2, $0
JE hashADDone
// Hash last < 16 byte tail
XORQ t0, t0
XORQ t1, t1
XORQ t2, t2
ADDQ itr2, adp
hashADTailLoop:
SHLQ $8, t1:t0
SHLQ $8, t0
MOVB -1(adp), t2
XORQ t2, t0
DECQ adp
DECQ itr2
JNE hashADTailLoop
hashADTailFinish:
ADDQ t0, acc0; ADCQ t1, acc1; ADCQ $1, acc2
polyMul
// Finished AD
hashADDone:
RET
// ----------------------------------------------------------------------------
// func chacha20Poly1305Open(dst, key, src, ad []byte) bool
TEXT ·chacha20Poly1305Open(SB), 0, $288-97
// For aligned stack access
MOVQ SP, BP
ADDQ $32, BP
ANDQ $-32, BP
MOVQ dst+0(FP), oup
MOVQ key+24(FP), keyp
MOVQ src+48(FP), inp
MOVQ src_len+56(FP), inl
MOVQ ad+72(FP), adp
// Check for AVX2 support
CMPB ·useAVX2(SB), $1
JE chacha20Poly1305Open_AVX2
// Special optimization, for very short buffers
CMPQ inl, $128
JBE openSSE128 // About 16% faster
// For long buffers, prepare the poly key first
MOVOU ·chacha20Constants<>(SB), A0
MOVOU (1*16)(keyp), B0
MOVOU (2*16)(keyp), C0
MOVOU (3*16)(keyp), D0
MOVO D0, T1
// Store state on stack for future use
MOVO B0, state1Store
MOVO C0, state2Store
MOVO D0, ctr3Store
MOVQ $10, itr2
openSSEPreparePolyKey:
chachaQR(A0, B0, C0, D0, T0)
shiftB0Left; shiftC0Left; shiftD0Left
chachaQR(A0, B0, C0, D0, T0)
shiftB0Right; shiftC0Right; shiftD0Right
DECQ itr2
JNE openSSEPreparePolyKey
// A0|B0 hold the Poly1305 32-byte key, C0,D0 can be discarded
PADDL ·chacha20Constants<>(SB), A0; PADDL state1Store, B0
// Clamp and store the key
PAND ·polyClampMask<>(SB), A0
MOVO A0, rStore; MOVO B0, sStore
// Hash AAD
MOVQ ad_len+80(FP), itr2
CALL polyHashADInternal<>(SB)
openSSEMainLoop:
CMPQ inl, $256
JB openSSEMainLoopDone
// Load state, increment counter blocks
MOVO ·chacha20Constants<>(SB), A0; MOVO state1Store, B0; MOVO state2Store, C0; MOVO ctr3Store, D0; PADDL ·sseIncMask<>(SB), D0
MOVO A0, A1; MOVO B0, B1; MOVO C0, C1; MOVO D0, D1; PADDL ·sseIncMask<>(SB), D1
MOVO A1, A2; MOVO B1, B2; MOVO C1, C2; MOVO D1, D2; PADDL ·sseIncMask<>(SB), D2
MOVO A2, A3; MOVO B2, B3; MOVO C2, C3; MOVO D2, D3; PADDL ·sseIncMask<>(SB), D3
// Store counters
MOVO D0, ctr0Store; MOVO D1, ctr1Store; MOVO D2, ctr2Store; MOVO D3, ctr3Store
// There are 10 ChaCha20 iterations of 2QR each, so for 6 iterations we hash 2 blocks, and for the remaining 4 only 1 block - for a total of 16
MOVQ $4, itr1
MOVQ inp, itr2
openSSEInternalLoop:
MOVO C3, tmpStore
chachaQR(A0, B0, C0, D0, C3); chachaQR(A1, B1, C1, D1, C3); chachaQR(A2, B2, C2, D2, C3)
MOVO tmpStore, C3
MOVO C1, tmpStore
chachaQR(A3, B3, C3, D3, C1)
MOVO tmpStore, C1
polyAdd(0(itr2))
shiftB0Left; shiftB1Left; shiftB2Left; shiftB3Left
shiftC0Left; shiftC1Left; shiftC2Left; shiftC3Left
shiftD0Left; shiftD1Left; shiftD2Left; shiftD3Left
polyMulStage1
polyMulStage2
LEAQ (2*8)(itr2), itr2
MOVO C3, tmpStore
chachaQR(A0, B0, C0, D0, C3); chachaQR(A1, B1, C1, D1, C3); chachaQR(A2, B2, C2, D2, C3)
MOVO tmpStore, C3
MOVO C1, tmpStore
polyMulStage3
chachaQR(A3, B3, C3, D3, C1)
MOVO tmpStore, C1
polyMulReduceStage
shiftB0Right; shiftB1Right; shiftB2Right; shiftB3Right
shiftC0Right; shiftC1Right; shiftC2Right; shiftC3Right
shiftD0Right; shiftD1Right; shiftD2Right; shiftD3Right
DECQ itr1
JGE openSSEInternalLoop
polyAdd(0(itr2))
polyMul
LEAQ (2*8)(itr2), itr2
CMPQ itr1, $-6
JG openSSEInternalLoop
// Add in the state
PADDD ·chacha20Constants<>(SB), A0; PADDD ·chacha20Constants<>(SB), A1; PADDD ·chacha20Constants<>(SB), A2; PADDD ·chacha20Constants<>(SB), A3
PADDD state1Store, B0; PADDD state1Store, B1; PADDD state1Store, B2; PADDD state1Store, B3
PADDD state2Store, C0; PADDD state2Store, C1; PADDD state2Store, C2; PADDD state2Store, C3
PADDD ctr0Store, D0; PADDD ctr1Store, D1; PADDD ctr2Store, D2; PADDD ctr3Store, D3
// Load - xor - store
MOVO D3, tmpStore
MOVOU (0*16)(inp), D3; PXOR D3, A0; MOVOU A0, (0*16)(oup)
MOVOU (1*16)(inp), D3; PXOR D3, B0; MOVOU B0, (1*16)(oup)
MOVOU (2*16)(inp), D3; PXOR D3, C0; MOVOU C0, (2*16)(oup)
MOVOU (3*16)(inp), D3; PXOR D3, D0; MOVOU D0, (3*16)(oup)
MOVOU (4*16)(inp), D0; PXOR D0, A1; MOVOU A1, (4*16)(oup)
MOVOU (5*16)(inp), D0; PXOR D0, B1; MOVOU B1, (5*16)(oup)
MOVOU (6*16)(inp), D0; PXOR D0, C1; MOVOU C1, (6*16)(oup)
MOVOU (7*16)(inp), D0; PXOR D0, D1; MOVOU D1, (7*16)(oup)
MOVOU (8*16)(inp), D0; PXOR D0, A2; MOVOU A2, (8*16)(oup)
MOVOU (9*16)(inp), D0; PXOR D0, B2; MOVOU B2, (9*16)(oup)
MOVOU (10*16)(inp), D0; PXOR D0, C2; MOVOU C2, (10*16)(oup)
MOVOU (11*16)(inp), D0; PXOR D0, D2; MOVOU D2, (11*16)(oup)
MOVOU (12*16)(inp), D0; PXOR D0, A3; MOVOU A3, (12*16)(oup)
MOVOU (13*16)(inp), D0; PXOR D0, B3; MOVOU B3, (13*16)(oup)
MOVOU (14*16)(inp), D0; PXOR D0, C3; MOVOU C3, (14*16)(oup)
MOVOU (15*16)(inp), D0; PXOR tmpStore, D0; MOVOU D0, (15*16)(oup)
LEAQ 256(inp), inp
LEAQ 256(oup), oup
SUBQ $256, inl
JMP openSSEMainLoop
openSSEMainLoopDone:
// Handle the various tail sizes efficiently
TESTQ inl, inl
JE openSSEFinalize
CMPQ inl, $64
JBE openSSETail64
CMPQ inl, $128
JBE openSSETail128
CMPQ inl, $192
JBE openSSETail192
JMP openSSETail256
openSSEFinalize:
// Hash in the PT, AAD lengths
ADDQ ad_len+80(FP), acc0; ADCQ src_len+56(FP), acc1; ADCQ $1, acc2
polyMul
// Final reduce
MOVQ acc0, t0
MOVQ acc1, t1
MOVQ acc2, t2
SUBQ $-5, acc0
SBBQ $-1, acc1
SBBQ $3, acc2
CMOVQCS t0, acc0
CMOVQCS t1, acc1
CMOVQCS t2, acc2
// Add in the "s" part of the key
ADDQ 0+sStore, acc0
ADCQ 8+sStore, acc1
// Finally, constant time compare to the tag at the end of the message
XORQ AX, AX
MOVQ $1, DX
XORQ (0*8)(inp), acc0
XORQ (1*8)(inp), acc1
ORQ acc1, acc0
CMOVQEQ DX, AX
// Return true iff tags are equal
MOVB AX, ret+96(FP)
RET
// ----------------------------------------------------------------------------
// Special optimization for buffers smaller than 129 bytes
openSSE128:
// For up to 128 bytes of ciphertext and 64 bytes for the poly key, we require to process three blocks
MOVOU ·chacha20Constants<>(SB), A0; MOVOU (1*16)(keyp), B0; MOVOU (2*16)(keyp), C0; MOVOU (3*16)(keyp), D0
MOVO A0, A1; MOVO B0, B1; MOVO C0, C1; MOVO D0, D1; PADDL ·sseIncMask<>(SB), D1
MOVO A1, A2; MOVO B1, B2; MOVO C1, C2; MOVO D1, D2; PADDL ·sseIncMask<>(SB), D2
MOVO B0, T1; MOVO C0, T2; MOVO D1, T3
MOVQ $10, itr2
openSSE128InnerCipherLoop:
chachaQR(A0, B0, C0, D0, T0); chachaQR(A1, B1, C1, D1, T0); chachaQR(A2, B2, C2, D2, T0)
shiftB0Left; shiftB1Left; shiftB2Left
shiftC0Left; shiftC1Left; shiftC2Left
shiftD0Left; shiftD1Left; shiftD2Left
chachaQR(A0, B0, C0, D0, T0); chachaQR(A1, B1, C1, D1, T0); chachaQR(A2, B2, C2, D2, T0)
shiftB0Right; shiftB1Right; shiftB2Right
shiftC0Right; shiftC1Right; shiftC2Right
shiftD0Right; shiftD1Right; shiftD2Right
DECQ itr2
JNE openSSE128InnerCipherLoop
// A0|B0 hold the Poly1305 32-byte key, C0,D0 can be discarded
PADDL ·chacha20Constants<>(SB), A0; PADDL ·chacha20Constants<>(SB), A1; PADDL ·chacha20Constants<>(SB), A2
PADDL T1, B0; PADDL T1, B1; PADDL T1, B2
PADDL T2, C1; PADDL T2, C2
PADDL T3, D1; PADDL ·sseIncMask<>(SB), T3; PADDL T3, D2
// Clamp and store the key
PAND ·polyClampMask<>(SB), A0
MOVOU A0, rStore; MOVOU B0, sStore
// Hash
MOVQ ad_len+80(FP), itr2
CALL polyHashADInternal<>(SB)
openSSE128Open:
CMPQ inl, $16
JB openSSETail16
SUBQ $16, inl
// Load for hashing
polyAdd(0(inp))
// Load for decryption
MOVOU (inp), T0; PXOR T0, A1; MOVOU A1, (oup)
LEAQ (1*16)(inp), inp
LEAQ (1*16)(oup), oup
polyMul
// Shift the stream "left"
MOVO B1, A1
MOVO C1, B1
MOVO D1, C1
MOVO A2, D1
MOVO B2, A2
MOVO C2, B2
MOVO D2, C2
JMP openSSE128Open
openSSETail16:
TESTQ inl, inl
JE openSSEFinalize
// We can safely load the CT from the end, because it is padded with the MAC
MOVQ inl, itr2
SHLQ $4, itr2
LEAQ ·andMask<>(SB), t0
MOVOU (inp), T0
ADDQ inl, inp
PAND -16(t0)(itr2*1), T0
MOVO T0, 0+tmpStore
MOVQ T0, t0
MOVQ 8+tmpStore, t1
PXOR A1, T0
// We can only store one byte at a time, since plaintext can be shorter than 16 bytes
openSSETail16Store:
MOVQ T0, t3
MOVB t3, (oup)
PSRLDQ $1, T0
INCQ oup
DECQ inl
JNE openSSETail16Store
ADDQ t0, acc0; ADCQ t1, acc1; ADCQ $1, acc2
polyMul
JMP openSSEFinalize
// ----------------------------------------------------------------------------
// Special optimization for the last 64 bytes of ciphertext
openSSETail64:
// Need to decrypt up to 64 bytes - prepare single block
MOVO ·chacha20Constants<>(SB), A0; MOVO state1Store, B0; MOVO state2Store, C0; MOVO ctr3Store, D0; PADDL ·sseIncMask<>(SB), D0; MOVO D0, ctr0Store
XORQ itr2, itr2
MOVQ inl, itr1
CMPQ itr1, $16
JB openSSETail64LoopB
openSSETail64LoopA:
// Perform ChaCha rounds, while hashing the remaining input
polyAdd(0(inp)(itr2*1))
polyMul
SUBQ $16, itr1
openSSETail64LoopB:
ADDQ $16, itr2
chachaQR(A0, B0, C0, D0, T0)
shiftB0Left; shiftC0Left; shiftD0Left
chachaQR(A0, B0, C0, D0, T0)
shiftB0Right; shiftC0Right; shiftD0Right
CMPQ itr1, $16
JAE openSSETail64LoopA
CMPQ itr2, $160
JNE openSSETail64LoopB
PADDL ·chacha20Constants<>(SB), A0; PADDL state1Store, B0; PADDL state2Store, C0; PADDL ctr0Store, D0
openSSETail64DecLoop:
CMPQ inl, $16
JB openSSETail64DecLoopDone
SUBQ $16, inl
MOVOU (inp), T0
PXOR T0, A0
MOVOU A0, (oup)
LEAQ 16(inp), inp
LEAQ 16(oup), oup
MOVO B0, A0
MOVO C0, B0
MOVO D0, C0
JMP openSSETail64DecLoop
openSSETail64DecLoopDone:
MOVO A0, A1
JMP openSSETail16
// ----------------------------------------------------------------------------
// Special optimization for the last 128 bytes of ciphertext
openSSETail128:
// Need to decrypt up to 128 bytes - prepare two blocks
MOVO ·chacha20Constants<>(SB), A1; MOVO state1Store, B1; MOVO state2Store, C1; MOVO ctr3Store, D1; PADDL ·sseIncMask<>(SB), D1; MOVO D1, ctr0Store
MOVO A1, A0; MOVO B1, B0; MOVO C1, C0; MOVO D1, D0; PADDL ·sseIncMask<>(SB), D0; MOVO D0, ctr1Store
XORQ itr2, itr2
MOVQ inl, itr1
ANDQ $-16, itr1
openSSETail128LoopA:
// Perform ChaCha rounds, while hashing the remaining input
polyAdd(0(inp)(itr2*1))
polyMul
openSSETail128LoopB:
ADDQ $16, itr2
chachaQR(A0, B0, C0, D0, T0); chachaQR(A1, B1, C1, D1, T0)
shiftB0Left; shiftC0Left; shiftD0Left
shiftB1Left; shiftC1Left; shiftD1Left
chachaQR(A0, B0, C0, D0, T0); chachaQR(A1, B1, C1, D1, T0)
shiftB0Right; shiftC0Right; shiftD0Right
shiftB1Right; shiftC1Right; shiftD1Right
CMPQ itr2, itr1
JB openSSETail128LoopA
CMPQ itr2, $160
JNE openSSETail128LoopB
PADDL ·chacha20Constants<>(SB), A0; PADDL ·chacha20Constants<>(SB), A1
PADDL state1Store, B0; PADDL state1Store, B1
PADDL state2Store, C0; PADDL state2Store, C1
PADDL ctr1Store, D0; PADDL ctr0Store, D1
MOVOU (0*16)(inp), T0; MOVOU (1*16)(inp), T1; MOVOU (2*16)(inp), T2; MOVOU (3*16)(inp), T3
PXOR T0, A1; PXOR T1, B1; PXOR T2, C1; PXOR T3, D1
MOVOU A1, (0*16)(oup); MOVOU B1, (1*16)(oup); MOVOU C1, (2*16)(oup); MOVOU D1, (3*16)(oup)
SUBQ $64, inl
LEAQ 64(inp), inp
LEAQ 64(oup), oup
JMP openSSETail64DecLoop
// ----------------------------------------------------------------------------
// Special optimization for the last 192 bytes of ciphertext
openSSETail192:
// Need to decrypt up to 192 bytes - prepare three blocks
MOVO ·chacha20Constants<>(SB), A2; MOVO state1Store, B2; MOVO state2Store, C2; MOVO ctr3Store, D2; PADDL ·sseIncMask<>(SB), D2; MOVO D2, ctr0Store
MOVO A2, A1; MOVO B2, B1; MOVO C2, C1; MOVO D2, D1; PADDL ·sseIncMask<>(SB), D1; MOVO D1, ctr1Store
MOVO A1, A0; MOVO B1, B0; MOVO C1, C0; MOVO D1, D0; PADDL ·sseIncMask<>(SB), D0; MOVO D0, ctr2Store
MOVQ inl, itr1
MOVQ $160, itr2
CMPQ itr1, $160
CMOVQGT itr2, itr1
ANDQ $-16, itr1
XORQ itr2, itr2
openSSLTail192LoopA:
// Perform ChaCha rounds, while hashing the remaining input
polyAdd(0(inp)(itr2*1))
polyMul
openSSLTail192LoopB:
ADDQ $16, itr2
chachaQR(A0, B0, C0, D0, T0); chachaQR(A1, B1, C1, D1, T0); chachaQR(A2, B2, C2, D2, T0)
shiftB0Left; shiftC0Left; shiftD0Left
shiftB1Left; shiftC1Left; shiftD1Left
shiftB2Left; shiftC2Left; shiftD2Left
chachaQR(A0, B0, C0, D0, T0); chachaQR(A1, B1, C1, D1, T0); chachaQR(A2, B2, C2, D2, T0)
shiftB0Right; shiftC0Right; shiftD0Right
shiftB1Right; shiftC1Right; shiftD1Right
shiftB2Right; shiftC2Right; shiftD2Right
CMPQ itr2, itr1
JB openSSLTail192LoopA
CMPQ itr2, $160
JNE openSSLTail192LoopB
CMPQ inl, $176
JB openSSLTail192Store
polyAdd(160(inp))
polyMul
CMPQ inl, $192
JB openSSLTail192Store
polyAdd(176(inp))
polyMul
openSSLTail192Store:
PADDL ·chacha20Constants<>(SB), A0; PADDL ·chacha20Constants<>(SB), A1; PADDL ·chacha20Constants<>(SB), A2
PADDL state1Store, B0; PADDL state1Store, B1; PADDL state1Store, B2
PADDL state2Store, C0; PADDL state2Store, C1; PADDL state2Store, C2
PADDL ctr2Store, D0; PADDL ctr1Store, D1; PADDL ctr0Store, D2
MOVOU (0*16)(inp), T0; MOVOU (1*16)(inp), T1; MOVOU (2*16)(inp), T2; MOVOU (3*16)(inp), T3
PXOR T0, A2; PXOR T1, B2; PXOR T2, C2; PXOR T3, D2
MOVOU A2, (0*16)(oup); MOVOU B2, (1*16)(oup); MOVOU C2, (2*16)(oup); MOVOU D2, (3*16)(oup)
MOVOU (4*16)(inp), T0; MOVOU (5*16)(inp), T1; MOVOU (6*16)(inp), T2; MOVOU (7*16)(inp), T3
PXOR T0, A1; PXOR T1, B1; PXOR T2, C1; PXOR T3, D1
MOVOU A1, (4*16)(oup); MOVOU B1, (5*16)(oup); MOVOU C1, (6*16)(oup); MOVOU D1, (7*16)(oup)
SUBQ $128, inl
LEAQ 128(inp), inp
LEAQ 128(oup), oup
JMP openSSETail64DecLoop
// ----------------------------------------------------------------------------
// Special optimization for the last 256 bytes of ciphertext
openSSETail256:
// Need to decrypt up to 256 bytes - prepare four blocks
MOVO ·chacha20Constants<>(SB), A0; MOVO state1Store, B0; MOVO state2Store, C0; MOVO ctr3Store, D0; PADDL ·sseIncMask<>(SB), D0
MOVO A0, A1; MOVO B0, B1; MOVO C0, C1; MOVO D0, D1; PADDL ·sseIncMask<>(SB), D1
MOVO A1, A2; MOVO B1, B2; MOVO C1, C2; MOVO D1, D2; PADDL ·sseIncMask<>(SB), D2
MOVO A2, A3; MOVO B2, B3; MOVO C2, C3; MOVO D2, D3; PADDL ·sseIncMask<>(SB), D3
// Store counters
MOVO D0, ctr0Store; MOVO D1, ctr1Store; MOVO D2, ctr2Store; MOVO D3, ctr3Store
XORQ itr2, itr2
openSSETail256Loop:
// This loop inteleaves 8 ChaCha quarter rounds with 1 poly multiplication
polyAdd(0(inp)(itr2*1))
MOVO C3, tmpStore
chachaQR(A0, B0, C0, D0, C3); chachaQR(A1, B1, C1, D1, C3); chachaQR(A2, B2, C2, D2, C3)
MOVO tmpStore, C3
MOVO C1, tmpStore
chachaQR(A3, B3, C3, D3, C1)
MOVO tmpStore, C1
shiftB0Left; shiftB1Left; shiftB2Left; shiftB3Left
shiftC0Left; shiftC1Left; shiftC2Left; shiftC3Left
shiftD0Left; shiftD1Left; shiftD2Left; shiftD3Left
polyMulStage1
polyMulStage2
MOVO C3, tmpStore
chachaQR(A0, B0, C0, D0, C3); chachaQR(A1, B1, C1, D1, C3); chachaQR(A2, B2, C2, D2, C3)
MOVO tmpStore, C3
MOVO C1, tmpStore
chachaQR(A3, B3, C3, D3, C1)
MOVO tmpStore, C1
polyMulStage3
polyMulReduceStage
shiftB0Right; shiftB1Right; shiftB2Right; shiftB3Right
shiftC0Right; shiftC1Right; shiftC2Right; shiftC3Right
shiftD0Right; shiftD1Right; shiftD2Right; shiftD3Right
ADDQ $2*8, itr2
CMPQ itr2, $160
JB openSSETail256Loop
MOVQ inl, itr1
ANDQ $-16, itr1
openSSETail256HashLoop:
polyAdd(0(inp)(itr2*1))
polyMul
ADDQ $2*8, itr2
CMPQ itr2, itr1
JB openSSETail256HashLoop
// Add in the state
PADDD ·chacha20Constants<>(SB), A0; PADDD ·chacha20Constants<>(SB), A1; PADDD ·chacha20Constants<>(SB), A2; PADDD ·chacha20Constants<>(SB), A3
PADDD state1Store, B0; PADDD state1Store, B1; PADDD state1Store, B2; PADDD state1Store, B3
PADDD state2Store, C0; PADDD state2Store, C1; PADDD state2Store, C2; PADDD state2Store, C3
PADDD ctr0Store, D0; PADDD ctr1Store, D1; PADDD ctr2Store, D2; PADDD ctr3Store, D3
MOVO D3, tmpStore
// Load - xor - store
MOVOU (0*16)(inp), D3; PXOR D3, A0
MOVOU (1*16)(inp), D3; PXOR D3, B0
MOVOU (2*16)(inp), D3; PXOR D3, C0
MOVOU (3*16)(inp), D3; PXOR D3, D0
MOVOU A0, (0*16)(oup)
MOVOU B0, (1*16)(oup)
MOVOU C0, (2*16)(oup)
MOVOU D0, (3*16)(oup)
MOVOU (4*16)(inp), A0; MOVOU (5*16)(inp), B0; MOVOU (6*16)(inp), C0; MOVOU (7*16)(inp), D0
PXOR A0, A1; PXOR B0, B1; PXOR C0, C1; PXOR D0, D1
MOVOU A1, (4*16)(oup); MOVOU B1, (5*16)(oup); MOVOU C1, (6*16)(oup); MOVOU D1, (7*16)(oup)
MOVOU (8*16)(inp), A0; MOVOU (9*16)(inp), B0; MOVOU (10*16)(inp), C0; MOVOU (11*16)(inp), D0
PXOR A0, A2; PXOR B0, B2; PXOR C0, C2; PXOR D0, D2
MOVOU A2, (8*16)(oup); MOVOU B2, (9*16)(oup); MOVOU C2, (10*16)(oup); MOVOU D2, (11*16)(oup)
LEAQ 192(inp), inp
LEAQ 192(oup), oup
SUBQ $192, inl
MOVO A3, A0
MOVO B3, B0
MOVO C3, C0
MOVO tmpStore, D0
JMP openSSETail64DecLoop
// ----------------------------------------------------------------------------
// ------------------------- AVX2 Code ----------------------------------------
chacha20Poly1305Open_AVX2:
VZEROUPPER
VMOVDQU ·chacha20Constants<>(SB), AA0
BYTE $0xc4; BYTE $0x42; BYTE $0x7d; BYTE $0x5a; BYTE $0x70; BYTE $0x10 // broadcasti128 16(r8), ymm14
BYTE $0xc4; BYTE $0x42; BYTE $0x7d; BYTE $0x5a; BYTE $0x60; BYTE $0x20 // broadcasti128 32(r8), ymm12
BYTE $0xc4; BYTE $0xc2; BYTE $0x7d; BYTE $0x5a; BYTE $0x60; BYTE $0x30 // broadcasti128 48(r8), ymm4
VPADDD ·avx2InitMask<>(SB), DD0, DD0
// Special optimization, for very short buffers
CMPQ inl, $192
JBE openAVX2192
CMPQ inl, $320
JBE openAVX2320
// For the general key prepare the key first - as a byproduct we have 64 bytes of cipher stream
VMOVDQA BB0, state1StoreAVX2
VMOVDQA CC0, state2StoreAVX2
VMOVDQA DD0, ctr3StoreAVX2
MOVQ $10, itr2
openAVX2PreparePolyKey:
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0)
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $12, DD0, DD0, DD0
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0)
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $4, DD0, DD0, DD0
DECQ itr2
JNE openAVX2PreparePolyKey
VPADDD ·chacha20Constants<>(SB), AA0, AA0
VPADDD state1StoreAVX2, BB0, BB0
VPADDD state2StoreAVX2, CC0, CC0
VPADDD ctr3StoreAVX2, DD0, DD0
VPERM2I128 $0x02, AA0, BB0, TT0
// Clamp and store poly key
VPAND ·polyClampMask<>(SB), TT0, TT0
VMOVDQA TT0, rsStoreAVX2
// Stream for the first 64 bytes
VPERM2I128 $0x13, AA0, BB0, AA0
VPERM2I128 $0x13, CC0, DD0, BB0
// Hash AD + first 64 bytes
MOVQ ad_len+80(FP), itr2
CALL polyHashADInternal<>(SB)
XORQ itr1, itr1
openAVX2InitialHash64:
polyAdd(0(inp)(itr1*1))
polyMulAVX2
ADDQ $16, itr1
CMPQ itr1, $64
JNE openAVX2InitialHash64
// Decrypt the first 64 bytes
VPXOR (0*32)(inp), AA0, AA0
VPXOR (1*32)(inp), BB0, BB0
VMOVDQU AA0, (0*32)(oup)
VMOVDQU BB0, (1*32)(oup)
LEAQ (2*32)(inp), inp
LEAQ (2*32)(oup), oup
SUBQ $64, inl
openAVX2MainLoop:
CMPQ inl, $512
JB openAVX2MainLoopDone
// Load state, increment counter blocks, store the incremented counters
VMOVDQU ·chacha20Constants<>(SB), AA0; VMOVDQA AA0, AA1; VMOVDQA AA0, AA2; VMOVDQA AA0, AA3
VMOVDQA state1StoreAVX2, BB0; VMOVDQA BB0, BB1; VMOVDQA BB0, BB2; VMOVDQA BB0, BB3
VMOVDQA state2StoreAVX2, CC0; VMOVDQA CC0, CC1; VMOVDQA CC0, CC2; VMOVDQA CC0, CC3
VMOVDQA ctr3StoreAVX2, DD0; VPADDD ·avx2IncMask<>(SB), DD0, DD0; VPADDD ·avx2IncMask<>(SB), DD0, DD1; VPADDD ·avx2IncMask<>(SB), DD1, DD2; VPADDD ·avx2IncMask<>(SB), DD2, DD3
VMOVDQA DD0, ctr0StoreAVX2; VMOVDQA DD1, ctr1StoreAVX2; VMOVDQA DD2, ctr2StoreAVX2; VMOVDQA DD3, ctr3StoreAVX2
XORQ itr1, itr1
openAVX2InternalLoop:
// Lets just say this spaghetti loop interleaves 2 quarter rounds with 3 poly multiplications
// Effectively per 512 bytes of stream we hash 480 bytes of ciphertext
polyAdd(0*8(inp)(itr1*1))
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
polyMulStage1_AVX2
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol16<>(SB), DD0, DD0; VPSHUFB ·rol16<>(SB), DD1, DD1; VPSHUFB ·rol16<>(SB), DD2, DD2; VPSHUFB ·rol16<>(SB), DD3, DD3
polyMulStage2_AVX2
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
polyMulStage3_AVX2
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $12, BB0, CC3; VPSRLD $20, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $12, BB1, CC3; VPSRLD $20, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $12, BB2, CC3; VPSRLD $20, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $12, BB3, CC3; VPSRLD $20, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
polyMulReduceStage
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol8<>(SB), DD0, DD0; VPSHUFB ·rol8<>(SB), DD1, DD1; VPSHUFB ·rol8<>(SB), DD2, DD2; VPSHUFB ·rol8<>(SB), DD3, DD3
polyAdd(2*8(inp)(itr1*1))
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
polyMulStage1_AVX2
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $7, BB0, CC3; VPSRLD $25, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $7, BB1, CC3; VPSRLD $25, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $7, BB2, CC3; VPSRLD $25, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $7, BB3, CC3; VPSRLD $25, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
polyMulStage2_AVX2
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $4, BB1, BB1, BB1; VPALIGNR $4, BB2, BB2, BB2; VPALIGNR $4, BB3, BB3, BB3
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2; VPALIGNR $8, CC3, CC3, CC3
VPALIGNR $12, DD0, DD0, DD0; VPALIGNR $12, DD1, DD1, DD1; VPALIGNR $12, DD2, DD2, DD2; VPALIGNR $12, DD3, DD3, DD3
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
polyMulStage3_AVX2
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol16<>(SB), DD0, DD0; VPSHUFB ·rol16<>(SB), DD1, DD1; VPSHUFB ·rol16<>(SB), DD2, DD2; VPSHUFB ·rol16<>(SB), DD3, DD3
polyMulReduceStage
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
polyAdd(4*8(inp)(itr1*1))
LEAQ (6*8)(itr1), itr1
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $12, BB0, CC3; VPSRLD $20, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $12, BB1, CC3; VPSRLD $20, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $12, BB2, CC3; VPSRLD $20, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $12, BB3, CC3; VPSRLD $20, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
polyMulStage1_AVX2
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
polyMulStage2_AVX2
VPSHUFB ·rol8<>(SB), DD0, DD0; VPSHUFB ·rol8<>(SB), DD1, DD1; VPSHUFB ·rol8<>(SB), DD2, DD2; VPSHUFB ·rol8<>(SB), DD3, DD3
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
polyMulStage3_AVX2
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $7, BB0, CC3; VPSRLD $25, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $7, BB1, CC3; VPSRLD $25, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $7, BB2, CC3; VPSRLD $25, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $7, BB3, CC3; VPSRLD $25, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
polyMulReduceStage
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $12, BB1, BB1, BB1; VPALIGNR $12, BB2, BB2, BB2; VPALIGNR $12, BB3, BB3, BB3
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2; VPALIGNR $8, CC3, CC3, CC3
VPALIGNR $4, DD0, DD0, DD0; VPALIGNR $4, DD1, DD1, DD1; VPALIGNR $4, DD2, DD2, DD2; VPALIGNR $4, DD3, DD3, DD3
CMPQ itr1, $480
JNE openAVX2InternalLoop
VPADDD ·chacha20Constants<>(SB), AA0, AA0; VPADDD ·chacha20Constants<>(SB), AA1, AA1; VPADDD ·chacha20Constants<>(SB), AA2, AA2; VPADDD ·chacha20Constants<>(SB), AA3, AA3
VPADDD state1StoreAVX2, BB0, BB0; VPADDD state1StoreAVX2, BB1, BB1; VPADDD state1StoreAVX2, BB2, BB2; VPADDD state1StoreAVX2, BB3, BB3
VPADDD state2StoreAVX2, CC0, CC0; VPADDD state2StoreAVX2, CC1, CC1; VPADDD state2StoreAVX2, CC2, CC2; VPADDD state2StoreAVX2, CC3, CC3
VPADDD ctr0StoreAVX2, DD0, DD0; VPADDD ctr1StoreAVX2, DD1, DD1; VPADDD ctr2StoreAVX2, DD2, DD2; VPADDD ctr3StoreAVX2, DD3, DD3
VMOVDQA CC3, tmpStoreAVX2
// We only hashed 480 of the 512 bytes available - hash the remaining 32 here
polyAdd(480(inp))
polyMulAVX2
VPERM2I128 $0x02, AA0, BB0, CC3; VPERM2I128 $0x13, AA0, BB0, BB0; VPERM2I128 $0x02, CC0, DD0, AA0; VPERM2I128 $0x13, CC0, DD0, CC0
VPXOR (0*32)(inp), CC3, CC3; VPXOR (1*32)(inp), AA0, AA0; VPXOR (2*32)(inp), BB0, BB0; VPXOR (3*32)(inp), CC0, CC0
VMOVDQU CC3, (0*32)(oup); VMOVDQU AA0, (1*32)(oup); VMOVDQU BB0, (2*32)(oup); VMOVDQU CC0, (3*32)(oup)
VPERM2I128 $0x02, AA1, BB1, AA0; VPERM2I128 $0x02, CC1, DD1, BB0; VPERM2I128 $0x13, AA1, BB1, CC0; VPERM2I128 $0x13, CC1, DD1, DD0
VPXOR (4*32)(inp), AA0, AA0; VPXOR (5*32)(inp), BB0, BB0; VPXOR (6*32)(inp), CC0, CC0; VPXOR (7*32)(inp), DD0, DD0
VMOVDQU AA0, (4*32)(oup); VMOVDQU BB0, (5*32)(oup); VMOVDQU CC0, (6*32)(oup); VMOVDQU DD0, (7*32)(oup)
// and here
polyAdd(496(inp))
polyMulAVX2
VPERM2I128 $0x02, AA2, BB2, AA0; VPERM2I128 $0x02, CC2, DD2, BB0; VPERM2I128 $0x13, AA2, BB2, CC0; VPERM2I128 $0x13, CC2, DD2, DD0
VPXOR (8*32)(inp), AA0, AA0; VPXOR (9*32)(inp), BB0, BB0; VPXOR (10*32)(inp), CC0, CC0; VPXOR (11*32)(inp), DD0, DD0
VMOVDQU AA0, (8*32)(oup); VMOVDQU BB0, (9*32)(oup); VMOVDQU CC0, (10*32)(oup); VMOVDQU DD0, (11*32)(oup)
VPERM2I128 $0x02, AA3, BB3, AA0; VPERM2I128 $0x02, tmpStoreAVX2, DD3, BB0; VPERM2I128 $0x13, AA3, BB3, CC0; VPERM2I128 $0x13, tmpStoreAVX2, DD3, DD0
VPXOR (12*32)(inp), AA0, AA0; VPXOR (13*32)(inp), BB0, BB0; VPXOR (14*32)(inp), CC0, CC0; VPXOR (15*32)(inp), DD0, DD0
VMOVDQU AA0, (12*32)(oup); VMOVDQU BB0, (13*32)(oup); VMOVDQU CC0, (14*32)(oup); VMOVDQU DD0, (15*32)(oup)
LEAQ (32*16)(inp), inp
LEAQ (32*16)(oup), oup
SUBQ $(32*16), inl
JMP openAVX2MainLoop
openAVX2MainLoopDone:
// Handle the various tail sizes efficiently
TESTQ inl, inl
JE openSSEFinalize
CMPQ inl, $128
JBE openAVX2Tail128
CMPQ inl, $256
JBE openAVX2Tail256
CMPQ inl, $384
JBE openAVX2Tail384
JMP openAVX2Tail512
// ----------------------------------------------------------------------------
// Special optimization for buffers smaller than 193 bytes
openAVX2192:
// For up to 192 bytes of ciphertext and 64 bytes for the poly key, we process four blocks
VMOVDQA AA0, AA1
VMOVDQA BB0, BB1
VMOVDQA CC0, CC1
VPADDD ·avx2IncMask<>(SB), DD0, DD1
VMOVDQA AA0, AA2
VMOVDQA BB0, BB2
VMOVDQA CC0, CC2
VMOVDQA DD0, DD2
VMOVDQA DD1, TT3
MOVQ $10, itr2
openAVX2192InnerCipherLoop:
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0)
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $4, BB1, BB1, BB1
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1
VPALIGNR $12, DD0, DD0, DD0; VPALIGNR $12, DD1, DD1, DD1
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0)
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $12, BB1, BB1, BB1
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1
VPALIGNR $4, DD0, DD0, DD0; VPALIGNR $4, DD1, DD1, DD1
DECQ itr2
JNE openAVX2192InnerCipherLoop
VPADDD AA2, AA0, AA0; VPADDD AA2, AA1, AA1
VPADDD BB2, BB0, BB0; VPADDD BB2, BB1, BB1
VPADDD CC2, CC0, CC0; VPADDD CC2, CC1, CC1
VPADDD DD2, DD0, DD0; VPADDD TT3, DD1, DD1
VPERM2I128 $0x02, AA0, BB0, TT0
// Clamp and store poly key
VPAND ·polyClampMask<>(SB), TT0, TT0
VMOVDQA TT0, rsStoreAVX2
// Stream for up to 192 bytes
VPERM2I128 $0x13, AA0, BB0, AA0
VPERM2I128 $0x13, CC0, DD0, BB0
VPERM2I128 $0x02, AA1, BB1, CC0
VPERM2I128 $0x02, CC1, DD1, DD0
VPERM2I128 $0x13, AA1, BB1, AA1
VPERM2I128 $0x13, CC1, DD1, BB1
openAVX2ShortOpen:
// Hash
MOVQ ad_len+80(FP), itr2
CALL polyHashADInternal<>(SB)
openAVX2ShortOpenLoop:
CMPQ inl, $32
JB openAVX2ShortTail32
SUBQ $32, inl
// Load for hashing
polyAdd(0*8(inp))
polyMulAVX2
polyAdd(2*8(inp))
polyMulAVX2
// Load for decryption
VPXOR (inp), AA0, AA0
VMOVDQU AA0, (oup)
LEAQ (1*32)(inp), inp
LEAQ (1*32)(oup), oup
// Shift stream left
VMOVDQA BB0, AA0
VMOVDQA CC0, BB0
VMOVDQA DD0, CC0
VMOVDQA AA1, DD0
VMOVDQA BB1, AA1
VMOVDQA CC1, BB1
VMOVDQA DD1, CC1
VMOVDQA AA2, DD1
VMOVDQA BB2, AA2
JMP openAVX2ShortOpenLoop
openAVX2ShortTail32:
CMPQ inl, $16
VMOVDQA A0, A1
JB openAVX2ShortDone
SUBQ $16, inl
// Load for hashing
polyAdd(0*8(inp))
polyMulAVX2
// Load for decryption
VPXOR (inp), A0, T0
VMOVDQU T0, (oup)
LEAQ (1*16)(inp), inp
LEAQ (1*16)(oup), oup
VPERM2I128 $0x11, AA0, AA0, AA0
VMOVDQA A0, A1
openAVX2ShortDone:
VZEROUPPER
JMP openSSETail16
// ----------------------------------------------------------------------------
// Special optimization for buffers smaller than 321 bytes
openAVX2320:
// For up to 320 bytes of ciphertext and 64 bytes for the poly key, we process six blocks
VMOVDQA AA0, AA1; VMOVDQA BB0, BB1; VMOVDQA CC0, CC1; VPADDD ·avx2IncMask<>(SB), DD0, DD1
VMOVDQA AA0, AA2; VMOVDQA BB0, BB2; VMOVDQA CC0, CC2; VPADDD ·avx2IncMask<>(SB), DD1, DD2
VMOVDQA BB0, TT1; VMOVDQA CC0, TT2; VMOVDQA DD0, TT3
MOVQ $10, itr2
openAVX2320InnerCipherLoop:
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0); chachaQR_AVX2(AA2, BB2, CC2, DD2, TT0)
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $4, BB1, BB1, BB1; VPALIGNR $4, BB2, BB2, BB2
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2
VPALIGNR $12, DD0, DD0, DD0; VPALIGNR $12, DD1, DD1, DD1; VPALIGNR $12, DD2, DD2, DD2
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0); chachaQR_AVX2(AA2, BB2, CC2, DD2, TT0)
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $12, BB1, BB1, BB1; VPALIGNR $12, BB2, BB2, BB2
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2
VPALIGNR $4, DD0, DD0, DD0; VPALIGNR $4, DD1, DD1, DD1; VPALIGNR $4, DD2, DD2, DD2
DECQ itr2
JNE openAVX2320InnerCipherLoop
VMOVDQA ·chacha20Constants<>(SB), TT0
VPADDD TT0, AA0, AA0; VPADDD TT0, AA1, AA1; VPADDD TT0, AA2, AA2
VPADDD TT1, BB0, BB0; VPADDD TT1, BB1, BB1; VPADDD TT1, BB2, BB2
VPADDD TT2, CC0, CC0; VPADDD TT2, CC1, CC1; VPADDD TT2, CC2, CC2
VMOVDQA ·avx2IncMask<>(SB), TT0
VPADDD TT3, DD0, DD0; VPADDD TT0, TT3, TT3
VPADDD TT3, DD1, DD1; VPADDD TT0, TT3, TT3
VPADDD TT3, DD2, DD2
// Clamp and store poly key
VPERM2I128 $0x02, AA0, BB0, TT0
VPAND ·polyClampMask<>(SB), TT0, TT0
VMOVDQA TT0, rsStoreAVX2
// Stream for up to 320 bytes
VPERM2I128 $0x13, AA0, BB0, AA0
VPERM2I128 $0x13, CC0, DD0, BB0
VPERM2I128 $0x02, AA1, BB1, CC0
VPERM2I128 $0x02, CC1, DD1, DD0
VPERM2I128 $0x13, AA1, BB1, AA1
VPERM2I128 $0x13, CC1, DD1, BB1
VPERM2I128 $0x02, AA2, BB2, CC1
VPERM2I128 $0x02, CC2, DD2, DD1
VPERM2I128 $0x13, AA2, BB2, AA2
VPERM2I128 $0x13, CC2, DD2, BB2
JMP openAVX2ShortOpen
// ----------------------------------------------------------------------------
// Special optimization for the last 128 bytes of ciphertext
openAVX2Tail128:
// Need to decrypt up to 128 bytes - prepare two blocks
VMOVDQA ·chacha20Constants<>(SB), AA1
VMOVDQA state1StoreAVX2, BB1
VMOVDQA state2StoreAVX2, CC1
VMOVDQA ctr3StoreAVX2, DD1
VPADDD ·avx2IncMask<>(SB), DD1, DD1
VMOVDQA DD1, DD0
XORQ itr2, itr2
MOVQ inl, itr1
ANDQ $-16, itr1
TESTQ itr1, itr1
JE openAVX2Tail128LoopB
openAVX2Tail128LoopA:
// Perform ChaCha rounds, while hashing the remaining input
polyAdd(0(inp)(itr2*1))
polyMulAVX2
openAVX2Tail128LoopB:
ADDQ $16, itr2
chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0)
VPALIGNR $4, BB1, BB1, BB1
VPALIGNR $8, CC1, CC1, CC1
VPALIGNR $12, DD1, DD1, DD1
chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0)
VPALIGNR $12, BB1, BB1, BB1
VPALIGNR $8, CC1, CC1, CC1
VPALIGNR $4, DD1, DD1, DD1
CMPQ itr2, itr1
JB openAVX2Tail128LoopA
CMPQ itr2, $160
JNE openAVX2Tail128LoopB
VPADDD ·chacha20Constants<>(SB), AA1, AA1
VPADDD state1StoreAVX2, BB1, BB1
VPADDD state2StoreAVX2, CC1, CC1
VPADDD DD0, DD1, DD1
VPERM2I128 $0x02, AA1, BB1, AA0; VPERM2I128 $0x02, CC1, DD1, BB0; VPERM2I128 $0x13, AA1, BB1, CC0; VPERM2I128 $0x13, CC1, DD1, DD0
openAVX2TailLoop:
CMPQ inl, $32
JB openAVX2Tail
SUBQ $32, inl
// Load for decryption
VPXOR (inp), AA0, AA0
VMOVDQU AA0, (oup)
LEAQ (1*32)(inp), inp
LEAQ (1*32)(oup), oup
VMOVDQA BB0, AA0
VMOVDQA CC0, BB0
VMOVDQA DD0, CC0
JMP openAVX2TailLoop
openAVX2Tail:
CMPQ inl, $16
VMOVDQA A0, A1
JB openAVX2TailDone
SUBQ $16, inl
// Load for decryption
VPXOR (inp), A0, T0
VMOVDQU T0, (oup)
LEAQ (1*16)(inp), inp
LEAQ (1*16)(oup), oup
VPERM2I128 $0x11, AA0, AA0, AA0
VMOVDQA A0, A1
openAVX2TailDone:
VZEROUPPER
JMP openSSETail16
// ----------------------------------------------------------------------------
// Special optimization for the last 256 bytes of ciphertext
openAVX2Tail256:
// Need to decrypt up to 256 bytes - prepare four blocks
VMOVDQA ·chacha20Constants<>(SB), AA0; VMOVDQA AA0, AA1
VMOVDQA state1StoreAVX2, BB0; VMOVDQA BB0, BB1
VMOVDQA state2StoreAVX2, CC0; VMOVDQA CC0, CC1
VMOVDQA ctr3StoreAVX2, DD0
VPADDD ·avx2IncMask<>(SB), DD0, DD0
VPADDD ·avx2IncMask<>(SB), DD0, DD1
VMOVDQA DD0, TT1
VMOVDQA DD1, TT2
// Compute the number of iterations that will hash data
MOVQ inl, tmpStoreAVX2
MOVQ inl, itr1
SUBQ $128, itr1
SHRQ $4, itr1
MOVQ $10, itr2
CMPQ itr1, $10
CMOVQGT itr2, itr1
MOVQ inp, inl
XORQ itr2, itr2
openAVX2Tail256LoopA:
polyAdd(0(inl))
polyMulAVX2
LEAQ 16(inl), inl
// Perform ChaCha rounds, while hashing the remaining input
openAVX2Tail256LoopB:
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0)
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $4, BB1, BB1, BB1
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1
VPALIGNR $12, DD0, DD0, DD0; VPALIGNR $12, DD1, DD1, DD1
INCQ itr2
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0)
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $12, BB1, BB1, BB1
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1
VPALIGNR $4, DD0, DD0, DD0; VPALIGNR $4, DD1, DD1, DD1
CMPQ itr2, itr1
JB openAVX2Tail256LoopA
CMPQ itr2, $10
JNE openAVX2Tail256LoopB
MOVQ inl, itr2
SUBQ inp, inl
MOVQ inl, itr1
MOVQ tmpStoreAVX2, inl
// Hash the remainder of data (if any)
openAVX2Tail256Hash:
ADDQ $16, itr1
CMPQ itr1, inl
JGT openAVX2Tail256HashEnd
polyAdd (0(itr2))
polyMulAVX2
LEAQ 16(itr2), itr2
JMP openAVX2Tail256Hash
// Store 128 bytes safely, then go to store loop
openAVX2Tail256HashEnd:
VPADDD ·chacha20Constants<>(SB), AA0, AA0; VPADDD ·chacha20Constants<>(SB), AA1, AA1
VPADDD state1StoreAVX2, BB0, BB0; VPADDD state1StoreAVX2, BB1, BB1
VPADDD state2StoreAVX2, CC0, CC0; VPADDD state2StoreAVX2, CC1, CC1
VPADDD TT1, DD0, DD0; VPADDD TT2, DD1, DD1
VPERM2I128 $0x02, AA0, BB0, AA2; VPERM2I128 $0x02, CC0, DD0, BB2; VPERM2I128 $0x13, AA0, BB0, CC2; VPERM2I128 $0x13, CC0, DD0, DD2
VPERM2I128 $0x02, AA1, BB1, AA0; VPERM2I128 $0x02, CC1, DD1, BB0; VPERM2I128 $0x13, AA1, BB1, CC0; VPERM2I128 $0x13, CC1, DD1, DD0
VPXOR (0*32)(inp), AA2, AA2; VPXOR (1*32)(inp), BB2, BB2; VPXOR (2*32)(inp), CC2, CC2; VPXOR (3*32)(inp), DD2, DD2
VMOVDQU AA2, (0*32)(oup); VMOVDQU BB2, (1*32)(oup); VMOVDQU CC2, (2*32)(oup); VMOVDQU DD2, (3*32)(oup)
LEAQ (4*32)(inp), inp
LEAQ (4*32)(oup), oup
SUBQ $4*32, inl
JMP openAVX2TailLoop
// ----------------------------------------------------------------------------
// Special optimization for the last 384 bytes of ciphertext
openAVX2Tail384:
// Need to decrypt up to 384 bytes - prepare six blocks
VMOVDQA ·chacha20Constants<>(SB), AA0; VMOVDQA AA0, AA1; VMOVDQA AA0, AA2
VMOVDQA state1StoreAVX2, BB0; VMOVDQA BB0, BB1; VMOVDQA BB0, BB2
VMOVDQA state2StoreAVX2, CC0; VMOVDQA CC0, CC1; VMOVDQA CC0, CC2
VMOVDQA ctr3StoreAVX2, DD0
VPADDD ·avx2IncMask<>(SB), DD0, DD0
VPADDD ·avx2IncMask<>(SB), DD0, DD1
VPADDD ·avx2IncMask<>(SB), DD1, DD2
VMOVDQA DD0, ctr0StoreAVX2
VMOVDQA DD1, ctr1StoreAVX2
VMOVDQA DD2, ctr2StoreAVX2
// Compute the number of iterations that will hash two blocks of data
MOVQ inl, tmpStoreAVX2
MOVQ inl, itr1
SUBQ $256, itr1
SHRQ $4, itr1
ADDQ $6, itr1
MOVQ $10, itr2
CMPQ itr1, $10
CMOVQGT itr2, itr1
MOVQ inp, inl
XORQ itr2, itr2
// Perform ChaCha rounds, while hashing the remaining input
openAVX2Tail384LoopB:
polyAdd(0(inl))
polyMulAVX2
LEAQ 16(inl), inl
openAVX2Tail384LoopA:
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0); chachaQR_AVX2(AA2, BB2, CC2, DD2, TT0)
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $4, BB1, BB1, BB1; VPALIGNR $4, BB2, BB2, BB2
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2
VPALIGNR $12, DD0, DD0, DD0; VPALIGNR $12, DD1, DD1, DD1; VPALIGNR $12, DD2, DD2, DD2
polyAdd(0(inl))
polyMulAVX2
LEAQ 16(inl), inl
INCQ itr2
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0); chachaQR_AVX2(AA2, BB2, CC2, DD2, TT0)
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $12, BB1, BB1, BB1; VPALIGNR $12, BB2, BB2, BB2
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2
VPALIGNR $4, DD0, DD0, DD0; VPALIGNR $4, DD1, DD1, DD1; VPALIGNR $4, DD2, DD2, DD2
CMPQ itr2, itr1
JB openAVX2Tail384LoopB
CMPQ itr2, $10
JNE openAVX2Tail384LoopA
MOVQ inl, itr2
SUBQ inp, inl
MOVQ inl, itr1
MOVQ tmpStoreAVX2, inl
openAVX2Tail384Hash:
ADDQ $16, itr1
CMPQ itr1, inl
JGT openAVX2Tail384HashEnd
polyAdd(0(itr2))
polyMulAVX2
LEAQ 16(itr2), itr2
JMP openAVX2Tail384Hash
// Store 256 bytes safely, then go to store loop
openAVX2Tail384HashEnd:
VPADDD ·chacha20Constants<>(SB), AA0, AA0; VPADDD ·chacha20Constants<>(SB), AA1, AA1; VPADDD ·chacha20Constants<>(SB), AA2, AA2
VPADDD state1StoreAVX2, BB0, BB0; VPADDD state1StoreAVX2, BB1, BB1; VPADDD state1StoreAVX2, BB2, BB2
VPADDD state2StoreAVX2, CC0, CC0; VPADDD state2StoreAVX2, CC1, CC1; VPADDD state2StoreAVX2, CC2, CC2
VPADDD ctr0StoreAVX2, DD0, DD0; VPADDD ctr1StoreAVX2, DD1, DD1; VPADDD ctr2StoreAVX2, DD2, DD2
VPERM2I128 $0x02, AA0, BB0, TT0; VPERM2I128 $0x02, CC0, DD0, TT1; VPERM2I128 $0x13, AA0, BB0, TT2; VPERM2I128 $0x13, CC0, DD0, TT3
VPXOR (0*32)(inp), TT0, TT0; VPXOR (1*32)(inp), TT1, TT1; VPXOR (2*32)(inp), TT2, TT2; VPXOR (3*32)(inp), TT3, TT3
VMOVDQU TT0, (0*32)(oup); VMOVDQU TT1, (1*32)(oup); VMOVDQU TT2, (2*32)(oup); VMOVDQU TT3, (3*32)(oup)
VPERM2I128 $0x02, AA1, BB1, TT0; VPERM2I128 $0x02, CC1, DD1, TT1; VPERM2I128 $0x13, AA1, BB1, TT2; VPERM2I128 $0x13, CC1, DD1, TT3
VPXOR (4*32)(inp), TT0, TT0; VPXOR (5*32)(inp), TT1, TT1; VPXOR (6*32)(inp), TT2, TT2; VPXOR (7*32)(inp), TT3, TT3
VMOVDQU TT0, (4*32)(oup); VMOVDQU TT1, (5*32)(oup); VMOVDQU TT2, (6*32)(oup); VMOVDQU TT3, (7*32)(oup)
VPERM2I128 $0x02, AA2, BB2, AA0; VPERM2I128 $0x02, CC2, DD2, BB0; VPERM2I128 $0x13, AA2, BB2, CC0; VPERM2I128 $0x13, CC2, DD2, DD0
LEAQ (8*32)(inp), inp
LEAQ (8*32)(oup), oup
SUBQ $8*32, inl
JMP openAVX2TailLoop
// ----------------------------------------------------------------------------
// Special optimization for the last 512 bytes of ciphertext
openAVX2Tail512:
VMOVDQU ·chacha20Constants<>(SB), AA0; VMOVDQA AA0, AA1; VMOVDQA AA0, AA2; VMOVDQA AA0, AA3
VMOVDQA state1StoreAVX2, BB0; VMOVDQA BB0, BB1; VMOVDQA BB0, BB2; VMOVDQA BB0, BB3
VMOVDQA state2StoreAVX2, CC0; VMOVDQA CC0, CC1; VMOVDQA CC0, CC2; VMOVDQA CC0, CC3
VMOVDQA ctr3StoreAVX2, DD0; VPADDD ·avx2IncMask<>(SB), DD0, DD0; VPADDD ·avx2IncMask<>(SB), DD0, DD1; VPADDD ·avx2IncMask<>(SB), DD1, DD2; VPADDD ·avx2IncMask<>(SB), DD2, DD3
VMOVDQA DD0, ctr0StoreAVX2; VMOVDQA DD1, ctr1StoreAVX2; VMOVDQA DD2, ctr2StoreAVX2; VMOVDQA DD3, ctr3StoreAVX2
XORQ itr1, itr1
MOVQ inp, itr2
openAVX2Tail512LoopB:
polyAdd(0(itr2))
polyMulAVX2
LEAQ (2*8)(itr2), itr2
openAVX2Tail512LoopA:
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol16<>(SB), DD0, DD0; VPSHUFB ·rol16<>(SB), DD1, DD1; VPSHUFB ·rol16<>(SB), DD2, DD2; VPSHUFB ·rol16<>(SB), DD3, DD3
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $12, BB0, CC3; VPSRLD $20, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $12, BB1, CC3; VPSRLD $20, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $12, BB2, CC3; VPSRLD $20, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $12, BB3, CC3; VPSRLD $20, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
polyAdd(0*8(itr2))
polyMulAVX2
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol8<>(SB), DD0, DD0; VPSHUFB ·rol8<>(SB), DD1, DD1; VPSHUFB ·rol8<>(SB), DD2, DD2; VPSHUFB ·rol8<>(SB), DD3, DD3
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $7, BB0, CC3; VPSRLD $25, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $7, BB1, CC3; VPSRLD $25, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $7, BB2, CC3; VPSRLD $25, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $7, BB3, CC3; VPSRLD $25, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $4, BB1, BB1, BB1; VPALIGNR $4, BB2, BB2, BB2; VPALIGNR $4, BB3, BB3, BB3
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2; VPALIGNR $8, CC3, CC3, CC3
VPALIGNR $12, DD0, DD0, DD0; VPALIGNR $12, DD1, DD1, DD1; VPALIGNR $12, DD2, DD2, DD2; VPALIGNR $12, DD3, DD3, DD3
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol16<>(SB), DD0, DD0; VPSHUFB ·rol16<>(SB), DD1, DD1; VPSHUFB ·rol16<>(SB), DD2, DD2; VPSHUFB ·rol16<>(SB), DD3, DD3
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
polyAdd(2*8(itr2))
polyMulAVX2
LEAQ (4*8)(itr2), itr2
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $12, BB0, CC3; VPSRLD $20, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $12, BB1, CC3; VPSRLD $20, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $12, BB2, CC3; VPSRLD $20, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $12, BB3, CC3; VPSRLD $20, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol8<>(SB), DD0, DD0; VPSHUFB ·rol8<>(SB), DD1, DD1; VPSHUFB ·rol8<>(SB), DD2, DD2; VPSHUFB ·rol8<>(SB), DD3, DD3
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $7, BB0, CC3; VPSRLD $25, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $7, BB1, CC3; VPSRLD $25, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $7, BB2, CC3; VPSRLD $25, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $7, BB3, CC3; VPSRLD $25, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $12, BB1, BB1, BB1; VPALIGNR $12, BB2, BB2, BB2; VPALIGNR $12, BB3, BB3, BB3
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2; VPALIGNR $8, CC3, CC3, CC3
VPALIGNR $4, DD0, DD0, DD0; VPALIGNR $4, DD1, DD1, DD1; VPALIGNR $4, DD2, DD2, DD2; VPALIGNR $4, DD3, DD3, DD3
INCQ itr1
CMPQ itr1, $4
JLT openAVX2Tail512LoopB
CMPQ itr1, $10
JNE openAVX2Tail512LoopA
MOVQ inl, itr1
SUBQ $384, itr1
ANDQ $-16, itr1
openAVX2Tail512HashLoop:
TESTQ itr1, itr1
JE openAVX2Tail512HashEnd
polyAdd(0(itr2))
polyMulAVX2
LEAQ 16(itr2), itr2
SUBQ $16, itr1
JMP openAVX2Tail512HashLoop
openAVX2Tail512HashEnd:
VPADDD ·chacha20Constants<>(SB), AA0, AA0; VPADDD ·chacha20Constants<>(SB), AA1, AA1; VPADDD ·chacha20Constants<>(SB), AA2, AA2; VPADDD ·chacha20Constants<>(SB), AA3, AA3
VPADDD state1StoreAVX2, BB0, BB0; VPADDD state1StoreAVX2, BB1, BB1; VPADDD state1StoreAVX2, BB2, BB2; VPADDD state1StoreAVX2, BB3, BB3
VPADDD state2StoreAVX2, CC0, CC0; VPADDD state2StoreAVX2, CC1, CC1; VPADDD state2StoreAVX2, CC2, CC2; VPADDD state2StoreAVX2, CC3, CC3
VPADDD ctr0StoreAVX2, DD0, DD0; VPADDD ctr1StoreAVX2, DD1, DD1; VPADDD ctr2StoreAVX2, DD2, DD2; VPADDD ctr3StoreAVX2, DD3, DD3
VMOVDQA CC3, tmpStoreAVX2
VPERM2I128 $0x02, AA0, BB0, CC3; VPERM2I128 $0x13, AA0, BB0, BB0; VPERM2I128 $0x02, CC0, DD0, AA0; VPERM2I128 $0x13, CC0, DD0, CC0
VPXOR (0*32)(inp), CC3, CC3; VPXOR (1*32)(inp), AA0, AA0; VPXOR (2*32)(inp), BB0, BB0; VPXOR (3*32)(inp), CC0, CC0
VMOVDQU CC3, (0*32)(oup); VMOVDQU AA0, (1*32)(oup); VMOVDQU BB0, (2*32)(oup); VMOVDQU CC0, (3*32)(oup)
VPERM2I128 $0x02, AA1, BB1, AA0; VPERM2I128 $0x02, CC1, DD1, BB0; VPERM2I128 $0x13, AA1, BB1, CC0; VPERM2I128 $0x13, CC1, DD1, DD0
VPXOR (4*32)(inp), AA0, AA0; VPXOR (5*32)(inp), BB0, BB0; VPXOR (6*32)(inp), CC0, CC0; VPXOR (7*32)(inp), DD0, DD0
VMOVDQU AA0, (4*32)(oup); VMOVDQU BB0, (5*32)(oup); VMOVDQU CC0, (6*32)(oup); VMOVDQU DD0, (7*32)(oup)
VPERM2I128 $0x02, AA2, BB2, AA0; VPERM2I128 $0x02, CC2, DD2, BB0; VPERM2I128 $0x13, AA2, BB2, CC0; VPERM2I128 $0x13, CC2, DD2, DD0
VPXOR (8*32)(inp), AA0, AA0; VPXOR (9*32)(inp), BB0, BB0; VPXOR (10*32)(inp), CC0, CC0; VPXOR (11*32)(inp), DD0, DD0
VMOVDQU AA0, (8*32)(oup); VMOVDQU BB0, (9*32)(oup); VMOVDQU CC0, (10*32)(oup); VMOVDQU DD0, (11*32)(oup)
VPERM2I128 $0x02, AA3, BB3, AA0; VPERM2I128 $0x02, tmpStoreAVX2, DD3, BB0; VPERM2I128 $0x13, AA3, BB3, CC0; VPERM2I128 $0x13, tmpStoreAVX2, DD3, DD0
LEAQ (12*32)(inp), inp
LEAQ (12*32)(oup), oup
SUBQ $12*32, inl
JMP openAVX2TailLoop
// ----------------------------------------------------------------------------
// ----------------------------------------------------------------------------
// func chacha20Poly1305Seal(dst, key, src, ad []byte)
TEXT ·chacha20Poly1305Seal(SB), 0, $288-96
// For aligned stack access
MOVQ SP, BP
ADDQ $32, BP
ANDQ $-32, BP
MOVQ dst+0(FP), oup
MOVQ key+24(FP), keyp
MOVQ src+48(FP), inp
MOVQ src_len+56(FP), inl
MOVQ ad+72(FP), adp
CMPB ·useAVX2(SB), $1
JE chacha20Poly1305Seal_AVX2
// Special optimization, for very short buffers
CMPQ inl, $128
JBE sealSSE128 // About 15% faster
// In the seal case - prepare the poly key + 3 blocks of stream in the first iteration
MOVOU ·chacha20Constants<>(SB), A0
MOVOU (1*16)(keyp), B0
MOVOU (2*16)(keyp), C0
MOVOU (3*16)(keyp), D0
// Store state on stack for future use
MOVO B0, state1Store
MOVO C0, state2Store
// Load state, increment counter blocks
MOVO A0, A1; MOVO B0, B1; MOVO C0, C1; MOVO D0, D1; PADDL ·sseIncMask<>(SB), D1
MOVO A1, A2; MOVO B1, B2; MOVO C1, C2; MOVO D1, D2; PADDL ·sseIncMask<>(SB), D2
MOVO A2, A3; MOVO B2, B3; MOVO C2, C3; MOVO D2, D3; PADDL ·sseIncMask<>(SB), D3
// Store counters
MOVO D0, ctr0Store; MOVO D1, ctr1Store; MOVO D2, ctr2Store; MOVO D3, ctr3Store
MOVQ $10, itr2
sealSSEIntroLoop:
MOVO C3, tmpStore
chachaQR(A0, B0, C0, D0, C3); chachaQR(A1, B1, C1, D1, C3); chachaQR(A2, B2, C2, D2, C3)
MOVO tmpStore, C3
MOVO C1, tmpStore
chachaQR(A3, B3, C3, D3, C1)
MOVO tmpStore, C1
shiftB0Left; shiftB1Left; shiftB2Left; shiftB3Left
shiftC0Left; shiftC1Left; shiftC2Left; shiftC3Left
shiftD0Left; shiftD1Left; shiftD2Left; shiftD3Left
MOVO C3, tmpStore
chachaQR(A0, B0, C0, D0, C3); chachaQR(A1, B1, C1, D1, C3); chachaQR(A2, B2, C2, D2, C3)
MOVO tmpStore, C3
MOVO C1, tmpStore
chachaQR(A3, B3, C3, D3, C1)
MOVO tmpStore, C1
shiftB0Right; shiftB1Right; shiftB2Right; shiftB3Right
shiftC0Right; shiftC1Right; shiftC2Right; shiftC3Right
shiftD0Right; shiftD1Right; shiftD2Right; shiftD3Right
DECQ itr2
JNE sealSSEIntroLoop
// Add in the state
PADDD ·chacha20Constants<>(SB), A0; PADDD ·chacha20Constants<>(SB), A1; PADDD ·chacha20Constants<>(SB), A2; PADDD ·chacha20Constants<>(SB), A3
PADDD state1Store, B0; PADDD state1Store, B1; PADDD state1Store, B2; PADDD state1Store, B3
PADDD state2Store, C1; PADDD state2Store, C2; PADDD state2Store, C3
PADDD ctr1Store, D1; PADDD ctr2Store, D2; PADDD ctr3Store, D3
// Clamp and store the key
PAND ·polyClampMask<>(SB), A0
MOVO A0, rStore
MOVO B0, sStore
// Hash AAD
MOVQ ad_len+80(FP), itr2
CALL polyHashADInternal<>(SB)
MOVOU (0*16)(inp), A0; MOVOU (1*16)(inp), B0; MOVOU (2*16)(inp), C0; MOVOU (3*16)(inp), D0
PXOR A0, A1; PXOR B0, B1; PXOR C0, C1; PXOR D0, D1
MOVOU A1, (0*16)(oup); MOVOU B1, (1*16)(oup); MOVOU C1, (2*16)(oup); MOVOU D1, (3*16)(oup)
MOVOU (4*16)(inp), A0; MOVOU (5*16)(inp), B0; MOVOU (6*16)(inp), C0; MOVOU (7*16)(inp), D0
PXOR A0, A2; PXOR B0, B2; PXOR C0, C2; PXOR D0, D2
MOVOU A2, (4*16)(oup); MOVOU B2, (5*16)(oup); MOVOU C2, (6*16)(oup); MOVOU D2, (7*16)(oup)
MOVQ $128, itr1
SUBQ $128, inl
LEAQ 128(inp), inp
MOVO A3, A1; MOVO B3, B1; MOVO C3, C1; MOVO D3, D1
CMPQ inl, $64
JBE sealSSE128SealHash
MOVOU (0*16)(inp), A0; MOVOU (1*16)(inp), B0; MOVOU (2*16)(inp), C0; MOVOU (3*16)(inp), D0
PXOR A0, A3; PXOR B0, B3; PXOR C0, C3; PXOR D0, D3
MOVOU A3, (8*16)(oup); MOVOU B3, (9*16)(oup); MOVOU C3, (10*16)(oup); MOVOU D3, (11*16)(oup)
ADDQ $64, itr1
SUBQ $64, inl
LEAQ 64(inp), inp
MOVQ $2, itr1
MOVQ $8, itr2
CMPQ inl, $64
JBE sealSSETail64
CMPQ inl, $128
JBE sealSSETail128
CMPQ inl, $192
JBE sealSSETail192
sealSSEMainLoop:
// Load state, increment counter blocks
MOVO ·chacha20Constants<>(SB), A0; MOVO state1Store, B0; MOVO state2Store, C0; MOVO ctr3Store, D0; PADDL ·sseIncMask<>(SB), D0
MOVO A0, A1; MOVO B0, B1; MOVO C0, C1; MOVO D0, D1; PADDL ·sseIncMask<>(SB), D1
MOVO A1, A2; MOVO B1, B2; MOVO C1, C2; MOVO D1, D2; PADDL ·sseIncMask<>(SB), D2
MOVO A2, A3; MOVO B2, B3; MOVO C2, C3; MOVO D2, D3; PADDL ·sseIncMask<>(SB), D3
// Store counters
MOVO D0, ctr0Store; MOVO D1, ctr1Store; MOVO D2, ctr2Store; MOVO D3, ctr3Store
sealSSEInnerLoop:
MOVO C3, tmpStore
chachaQR(A0, B0, C0, D0, C3); chachaQR(A1, B1, C1, D1, C3); chachaQR(A2, B2, C2, D2, C3)
MOVO tmpStore, C3
MOVO C1, tmpStore
chachaQR(A3, B3, C3, D3, C1)
MOVO tmpStore, C1
polyAdd(0(oup))
shiftB0Left; shiftB1Left; shiftB2Left; shiftB3Left
shiftC0Left; shiftC1Left; shiftC2Left; shiftC3Left
shiftD0Left; shiftD1Left; shiftD2Left; shiftD3Left
polyMulStage1
polyMulStage2
LEAQ (2*8)(oup), oup
MOVO C3, tmpStore
chachaQR(A0, B0, C0, D0, C3); chachaQR(A1, B1, C1, D1, C3); chachaQR(A2, B2, C2, D2, C3)
MOVO tmpStore, C3
MOVO C1, tmpStore
polyMulStage3
chachaQR(A3, B3, C3, D3, C1)
MOVO tmpStore, C1
polyMulReduceStage
shiftB0Right; shiftB1Right; shiftB2Right; shiftB3Right
shiftC0Right; shiftC1Right; shiftC2Right; shiftC3Right
shiftD0Right; shiftD1Right; shiftD2Right; shiftD3Right
DECQ itr2
JGE sealSSEInnerLoop
polyAdd(0(oup))
polyMul
LEAQ (2*8)(oup), oup
DECQ itr1
JG sealSSEInnerLoop
// Add in the state
PADDD ·chacha20Constants<>(SB), A0; PADDD ·chacha20Constants<>(SB), A1; PADDD ·chacha20Constants<>(SB), A2; PADDD ·chacha20Constants<>(SB), A3
PADDD state1Store, B0; PADDD state1Store, B1; PADDD state1Store, B2; PADDD state1Store, B3
PADDD state2Store, C0; PADDD state2Store, C1; PADDD state2Store, C2; PADDD state2Store, C3
PADDD ctr0Store, D0; PADDD ctr1Store, D1; PADDD ctr2Store, D2; PADDD ctr3Store, D3
MOVO D3, tmpStore
// Load - xor - store
MOVOU (0*16)(inp), D3; PXOR D3, A0
MOVOU (1*16)(inp), D3; PXOR D3, B0
MOVOU (2*16)(inp), D3; PXOR D3, C0
MOVOU (3*16)(inp), D3; PXOR D3, D0
MOVOU A0, (0*16)(oup)
MOVOU B0, (1*16)(oup)
MOVOU C0, (2*16)(oup)
MOVOU D0, (3*16)(oup)
MOVO tmpStore, D3
MOVOU (4*16)(inp), A0; MOVOU (5*16)(inp), B0; MOVOU (6*16)(inp), C0; MOVOU (7*16)(inp), D0
PXOR A0, A1; PXOR B0, B1; PXOR C0, C1; PXOR D0, D1
MOVOU A1, (4*16)(oup); MOVOU B1, (5*16)(oup); MOVOU C1, (6*16)(oup); MOVOU D1, (7*16)(oup)
MOVOU (8*16)(inp), A0; MOVOU (9*16)(inp), B0; MOVOU (10*16)(inp), C0; MOVOU (11*16)(inp), D0
PXOR A0, A2; PXOR B0, B2; PXOR C0, C2; PXOR D0, D2
MOVOU A2, (8*16)(oup); MOVOU B2, (9*16)(oup); MOVOU C2, (10*16)(oup); MOVOU D2, (11*16)(oup)
ADDQ $192, inp
MOVQ $192, itr1
SUBQ $192, inl
MOVO A3, A1
MOVO B3, B1
MOVO C3, C1
MOVO D3, D1
CMPQ inl, $64
JBE sealSSE128SealHash
MOVOU (0*16)(inp), A0; MOVOU (1*16)(inp), B0; MOVOU (2*16)(inp), C0; MOVOU (3*16)(inp), D0
PXOR A0, A3; PXOR B0, B3; PXOR C0, C3; PXOR D0, D3
MOVOU A3, (12*16)(oup); MOVOU B3, (13*16)(oup); MOVOU C3, (14*16)(oup); MOVOU D3, (15*16)(oup)
LEAQ 64(inp), inp
SUBQ $64, inl
MOVQ $6, itr1
MOVQ $4, itr2
CMPQ inl, $192
JG sealSSEMainLoop
MOVQ inl, itr1
TESTQ inl, inl
JE sealSSE128SealHash
MOVQ $6, itr1
CMPQ inl, $64
JBE sealSSETail64
CMPQ inl, $128
JBE sealSSETail128
JMP sealSSETail192
// ----------------------------------------------------------------------------
// Special optimization for the last 64 bytes of plaintext
sealSSETail64:
// Need to encrypt up to 64 bytes - prepare single block, hash 192 or 256 bytes
MOVO ·chacha20Constants<>(SB), A1
MOVO state1Store, B1
MOVO state2Store, C1
MOVO ctr3Store, D1
PADDL ·sseIncMask<>(SB), D1
MOVO D1, ctr0Store
sealSSETail64LoopA:
// Perform ChaCha rounds, while hashing the previously encrypted ciphertext
polyAdd(0(oup))
polyMul
LEAQ 16(oup), oup
sealSSETail64LoopB:
chachaQR(A1, B1, C1, D1, T1)
shiftB1Left; shiftC1Left; shiftD1Left
chachaQR(A1, B1, C1, D1, T1)
shiftB1Right; shiftC1Right; shiftD1Right
polyAdd(0(oup))
polyMul
LEAQ 16(oup), oup
DECQ itr1
JG sealSSETail64LoopA
DECQ itr2
JGE sealSSETail64LoopB
PADDL ·chacha20Constants<>(SB), A1
PADDL state1Store, B1
PADDL state2Store, C1
PADDL ctr0Store, D1
JMP sealSSE128Seal
// ----------------------------------------------------------------------------
// Special optimization for the last 128 bytes of plaintext
sealSSETail128:
// Need to encrypt up to 128 bytes - prepare two blocks, hash 192 or 256 bytes
MOVO ·chacha20Constants<>(SB), A0; MOVO state1Store, B0; MOVO state2Store, C0; MOVO ctr3Store, D0; PADDL ·sseIncMask<>(SB), D0; MOVO D0, ctr0Store
MOVO A0, A1; MOVO B0, B1; MOVO C0, C1; MOVO D0, D1; PADDL ·sseIncMask<>(SB), D1; MOVO D1, ctr1Store
sealSSETail128LoopA:
// Perform ChaCha rounds, while hashing the previously encrypted ciphertext
polyAdd(0(oup))
polyMul
LEAQ 16(oup), oup
sealSSETail128LoopB:
chachaQR(A0, B0, C0, D0, T0); chachaQR(A1, B1, C1, D1, T0)
shiftB0Left; shiftC0Left; shiftD0Left
shiftB1Left; shiftC1Left; shiftD1Left
polyAdd(0(oup))
polyMul
LEAQ 16(oup), oup
chachaQR(A0, B0, C0, D0, T0); chachaQR(A1, B1, C1, D1, T0)
shiftB0Right; shiftC0Right; shiftD0Right
shiftB1Right; shiftC1Right; shiftD1Right
DECQ itr1
JG sealSSETail128LoopA
DECQ itr2
JGE sealSSETail128LoopB
PADDL ·chacha20Constants<>(SB), A0; PADDL ·chacha20Constants<>(SB), A1
PADDL state1Store, B0; PADDL state1Store, B1
PADDL state2Store, C0; PADDL state2Store, C1
PADDL ctr0Store, D0; PADDL ctr1Store, D1
MOVOU (0*16)(inp), T0; MOVOU (1*16)(inp), T1; MOVOU (2*16)(inp), T2; MOVOU (3*16)(inp), T3
PXOR T0, A0; PXOR T1, B0; PXOR T2, C0; PXOR T3, D0
MOVOU A0, (0*16)(oup); MOVOU B0, (1*16)(oup); MOVOU C0, (2*16)(oup); MOVOU D0, (3*16)(oup)
MOVQ $64, itr1
LEAQ 64(inp), inp
SUBQ $64, inl
JMP sealSSE128SealHash
// ----------------------------------------------------------------------------
// Special optimization for the last 192 bytes of plaintext
sealSSETail192:
// Need to encrypt up to 192 bytes - prepare three blocks, hash 192 or 256 bytes
MOVO ·chacha20Constants<>(SB), A0; MOVO state1Store, B0; MOVO state2Store, C0; MOVO ctr3Store, D0; PADDL ·sseIncMask<>(SB), D0; MOVO D0, ctr0Store
MOVO A0, A1; MOVO B0, B1; MOVO C0, C1; MOVO D0, D1; PADDL ·sseIncMask<>(SB), D1; MOVO D1, ctr1Store
MOVO A1, A2; MOVO B1, B2; MOVO C1, C2; MOVO D1, D2; PADDL ·sseIncMask<>(SB), D2; MOVO D2, ctr2Store
sealSSETail192LoopA:
// Perform ChaCha rounds, while hashing the previously encrypted ciphertext
polyAdd(0(oup))
polyMul
LEAQ 16(oup), oup
sealSSETail192LoopB:
chachaQR(A0, B0, C0, D0, T0); chachaQR(A1, B1, C1, D1, T0); chachaQR(A2, B2, C2, D2, T0)
shiftB0Left; shiftC0Left; shiftD0Left
shiftB1Left; shiftC1Left; shiftD1Left
shiftB2Left; shiftC2Left; shiftD2Left
polyAdd(0(oup))
polyMul
LEAQ 16(oup), oup
chachaQR(A0, B0, C0, D0, T0); chachaQR(A1, B1, C1, D1, T0); chachaQR(A2, B2, C2, D2, T0)
shiftB0Right; shiftC0Right; shiftD0Right
shiftB1Right; shiftC1Right; shiftD1Right
shiftB2Right; shiftC2Right; shiftD2Right
DECQ itr1
JG sealSSETail192LoopA
DECQ itr2
JGE sealSSETail192LoopB
PADDL ·chacha20Constants<>(SB), A0; PADDL ·chacha20Constants<>(SB), A1; PADDL ·chacha20Constants<>(SB), A2
PADDL state1Store, B0; PADDL state1Store, B1; PADDL state1Store, B2
PADDL state2Store, C0; PADDL state2Store, C1; PADDL state2Store, C2
PADDL ctr0Store, D0; PADDL ctr1Store, D1; PADDL ctr2Store, D2
MOVOU (0*16)(inp), T0; MOVOU (1*16)(inp), T1; MOVOU (2*16)(inp), T2; MOVOU (3*16)(inp), T3
PXOR T0, A0; PXOR T1, B0; PXOR T2, C0; PXOR T3, D0
MOVOU A0, (0*16)(oup); MOVOU B0, (1*16)(oup); MOVOU C0, (2*16)(oup); MOVOU D0, (3*16)(oup)
MOVOU (4*16)(inp), T0; MOVOU (5*16)(inp), T1; MOVOU (6*16)(inp), T2; MOVOU (7*16)(inp), T3
PXOR T0, A1; PXOR T1, B1; PXOR T2, C1; PXOR T3, D1
MOVOU A1, (4*16)(oup); MOVOU B1, (5*16)(oup); MOVOU C1, (6*16)(oup); MOVOU D1, (7*16)(oup)
MOVO A2, A1
MOVO B2, B1
MOVO C2, C1
MOVO D2, D1
MOVQ $128, itr1
LEAQ 128(inp), inp
SUBQ $128, inl
JMP sealSSE128SealHash
// ----------------------------------------------------------------------------
// Special seal optimization for buffers smaller than 129 bytes
sealSSE128:
// For up to 128 bytes of ciphertext and 64 bytes for the poly key, we require to process three blocks
MOVOU ·chacha20Constants<>(SB), A0; MOVOU (1*16)(keyp), B0; MOVOU (2*16)(keyp), C0; MOVOU (3*16)(keyp), D0
MOVO A0, A1; MOVO B0, B1; MOVO C0, C1; MOVO D0, D1; PADDL ·sseIncMask<>(SB), D1
MOVO A1, A2; MOVO B1, B2; MOVO C1, C2; MOVO D1, D2; PADDL ·sseIncMask<>(SB), D2
MOVO B0, T1; MOVO C0, T2; MOVO D1, T3
MOVQ $10, itr2
sealSSE128InnerCipherLoop:
chachaQR(A0, B0, C0, D0, T0); chachaQR(A1, B1, C1, D1, T0); chachaQR(A2, B2, C2, D2, T0)
shiftB0Left; shiftB1Left; shiftB2Left
shiftC0Left; shiftC1Left; shiftC2Left
shiftD0Left; shiftD1Left; shiftD2Left
chachaQR(A0, B0, C0, D0, T0); chachaQR(A1, B1, C1, D1, T0); chachaQR(A2, B2, C2, D2, T0)
shiftB0Right; shiftB1Right; shiftB2Right
shiftC0Right; shiftC1Right; shiftC2Right
shiftD0Right; shiftD1Right; shiftD2Right
DECQ itr2
JNE sealSSE128InnerCipherLoop
// A0|B0 hold the Poly1305 32-byte key, C0,D0 can be discarded
PADDL ·chacha20Constants<>(SB), A0; PADDL ·chacha20Constants<>(SB), A1; PADDL ·chacha20Constants<>(SB), A2
PADDL T1, B0; PADDL T1, B1; PADDL T1, B2
PADDL T2, C1; PADDL T2, C2
PADDL T3, D1; PADDL ·sseIncMask<>(SB), T3; PADDL T3, D2
PAND ·polyClampMask<>(SB), A0
MOVOU A0, rStore
MOVOU B0, sStore
// Hash
MOVQ ad_len+80(FP), itr2
CALL polyHashADInternal<>(SB)
XORQ itr1, itr1
sealSSE128SealHash:
// itr1 holds the number of bytes encrypted but not yet hashed
CMPQ itr1, $16
JB sealSSE128Seal
polyAdd(0(oup))
polyMul
SUBQ $16, itr1
ADDQ $16, oup
JMP sealSSE128SealHash
sealSSE128Seal:
CMPQ inl, $16
JB sealSSETail
SUBQ $16, inl
// Load for decryption
MOVOU (inp), T0
PXOR T0, A1
MOVOU A1, (oup)
LEAQ (1*16)(inp), inp
LEAQ (1*16)(oup), oup
// Extract for hashing
MOVQ A1, t0
PSRLDQ $8, A1
MOVQ A1, t1
ADDQ t0, acc0; ADCQ t1, acc1; ADCQ $1, acc2
polyMul
// Shift the stream "left"
MOVO B1, A1
MOVO C1, B1
MOVO D1, C1
MOVO A2, D1
MOVO B2, A2
MOVO C2, B2
MOVO D2, C2
JMP sealSSE128Seal
sealSSETail:
TESTQ inl, inl
JE sealSSEFinalize
// We can only load the PT one byte at a time to avoid read after end of buffer
MOVQ inl, itr2
SHLQ $4, itr2
LEAQ ·andMask<>(SB), t0
MOVQ inl, itr1
LEAQ -1(inp)(inl*1), inp
XORQ t2, t2
XORQ t3, t3
XORQ AX, AX
sealSSETailLoadLoop:
SHLQ $8, t2, t3
SHLQ $8, t2
MOVB (inp), AX
XORQ AX, t2
LEAQ -1(inp), inp
DECQ itr1
JNE sealSSETailLoadLoop
MOVQ t2, 0+tmpStore
MOVQ t3, 8+tmpStore
PXOR 0+tmpStore, A1
MOVOU A1, (oup)
MOVOU -16(t0)(itr2*1), T0
PAND T0, A1
MOVQ A1, t0
PSRLDQ $8, A1
MOVQ A1, t1
ADDQ t0, acc0; ADCQ t1, acc1; ADCQ $1, acc2
polyMul
ADDQ inl, oup
sealSSEFinalize:
// Hash in the buffer lengths
ADDQ ad_len+80(FP), acc0
ADCQ src_len+56(FP), acc1
ADCQ $1, acc2
polyMul
// Final reduce
MOVQ acc0, t0
MOVQ acc1, t1
MOVQ acc2, t2
SUBQ $-5, acc0
SBBQ $-1, acc1
SBBQ $3, acc2
CMOVQCS t0, acc0
CMOVQCS t1, acc1
CMOVQCS t2, acc2
// Add in the "s" part of the key
ADDQ 0+sStore, acc0
ADCQ 8+sStore, acc1
// Finally store the tag at the end of the message
MOVQ acc0, (0*8)(oup)
MOVQ acc1, (1*8)(oup)
RET
// ----------------------------------------------------------------------------
// ------------------------- AVX2 Code ----------------------------------------
chacha20Poly1305Seal_AVX2:
VZEROUPPER
VMOVDQU ·chacha20Constants<>(SB), AA0
BYTE $0xc4; BYTE $0x42; BYTE $0x7d; BYTE $0x5a; BYTE $0x70; BYTE $0x10 // broadcasti128 16(r8), ymm14
BYTE $0xc4; BYTE $0x42; BYTE $0x7d; BYTE $0x5a; BYTE $0x60; BYTE $0x20 // broadcasti128 32(r8), ymm12
BYTE $0xc4; BYTE $0xc2; BYTE $0x7d; BYTE $0x5a; BYTE $0x60; BYTE $0x30 // broadcasti128 48(r8), ymm4
VPADDD ·avx2InitMask<>(SB), DD0, DD0
// Special optimizations, for very short buffers
CMPQ inl, $192
JBE seal192AVX2 // 33% faster
CMPQ inl, $320
JBE seal320AVX2 // 17% faster
// For the general key prepare the key first - as a byproduct we have 64 bytes of cipher stream
VMOVDQA AA0, AA1; VMOVDQA AA0, AA2; VMOVDQA AA0, AA3
VMOVDQA BB0, BB1; VMOVDQA BB0, BB2; VMOVDQA BB0, BB3; VMOVDQA BB0, state1StoreAVX2
VMOVDQA CC0, CC1; VMOVDQA CC0, CC2; VMOVDQA CC0, CC3; VMOVDQA CC0, state2StoreAVX2
VPADDD ·avx2IncMask<>(SB), DD0, DD1; VMOVDQA DD0, ctr0StoreAVX2
VPADDD ·avx2IncMask<>(SB), DD1, DD2; VMOVDQA DD1, ctr1StoreAVX2
VPADDD ·avx2IncMask<>(SB), DD2, DD3; VMOVDQA DD2, ctr2StoreAVX2
VMOVDQA DD3, ctr3StoreAVX2
MOVQ $10, itr2
sealAVX2IntroLoop:
VMOVDQA CC3, tmpStoreAVX2
chachaQR_AVX2(AA0, BB0, CC0, DD0, CC3); chachaQR_AVX2(AA1, BB1, CC1, DD1, CC3); chachaQR_AVX2(AA2, BB2, CC2, DD2, CC3)
VMOVDQA tmpStoreAVX2, CC3
VMOVDQA CC1, tmpStoreAVX2
chachaQR_AVX2(AA3, BB3, CC3, DD3, CC1)
VMOVDQA tmpStoreAVX2, CC1
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $12, DD0, DD0, DD0
VPALIGNR $4, BB1, BB1, BB1; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $12, DD1, DD1, DD1
VPALIGNR $4, BB2, BB2, BB2; VPALIGNR $8, CC2, CC2, CC2; VPALIGNR $12, DD2, DD2, DD2
VPALIGNR $4, BB3, BB3, BB3; VPALIGNR $8, CC3, CC3, CC3; VPALIGNR $12, DD3, DD3, DD3
VMOVDQA CC3, tmpStoreAVX2
chachaQR_AVX2(AA0, BB0, CC0, DD0, CC3); chachaQR_AVX2(AA1, BB1, CC1, DD1, CC3); chachaQR_AVX2(AA2, BB2, CC2, DD2, CC3)
VMOVDQA tmpStoreAVX2, CC3
VMOVDQA CC1, tmpStoreAVX2
chachaQR_AVX2(AA3, BB3, CC3, DD3, CC1)
VMOVDQA tmpStoreAVX2, CC1
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $4, DD0, DD0, DD0
VPALIGNR $12, BB1, BB1, BB1; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $4, DD1, DD1, DD1
VPALIGNR $12, BB2, BB2, BB2; VPALIGNR $8, CC2, CC2, CC2; VPALIGNR $4, DD2, DD2, DD2
VPALIGNR $12, BB3, BB3, BB3; VPALIGNR $8, CC3, CC3, CC3; VPALIGNR $4, DD3, DD3, DD3
DECQ itr2
JNE sealAVX2IntroLoop
VPADDD ·chacha20Constants<>(SB), AA0, AA0; VPADDD ·chacha20Constants<>(SB), AA1, AA1; VPADDD ·chacha20Constants<>(SB), AA2, AA2; VPADDD ·chacha20Constants<>(SB), AA3, AA3
VPADDD state1StoreAVX2, BB0, BB0; VPADDD state1StoreAVX2, BB1, BB1; VPADDD state1StoreAVX2, BB2, BB2; VPADDD state1StoreAVX2, BB3, BB3
VPADDD state2StoreAVX2, CC0, CC0; VPADDD state2StoreAVX2, CC1, CC1; VPADDD state2StoreAVX2, CC2, CC2; VPADDD state2StoreAVX2, CC3, CC3
VPADDD ctr0StoreAVX2, DD0, DD0; VPADDD ctr1StoreAVX2, DD1, DD1; VPADDD ctr2StoreAVX2, DD2, DD2; VPADDD ctr3StoreAVX2, DD3, DD3
VPERM2I128 $0x13, CC0, DD0, CC0 // Stream bytes 96 - 127
VPERM2I128 $0x02, AA0, BB0, DD0 // The Poly1305 key
VPERM2I128 $0x13, AA0, BB0, AA0 // Stream bytes 64 - 95
// Clamp and store poly key
VPAND ·polyClampMask<>(SB), DD0, DD0
VMOVDQA DD0, rsStoreAVX2
// Hash AD
MOVQ ad_len+80(FP), itr2
CALL polyHashADInternal<>(SB)
// Can store at least 320 bytes
VPXOR (0*32)(inp), AA0, AA0
VPXOR (1*32)(inp), CC0, CC0
VMOVDQU AA0, (0*32)(oup)
VMOVDQU CC0, (1*32)(oup)
VPERM2I128 $0x02, AA1, BB1, AA0; VPERM2I128 $0x02, CC1, DD1, BB0; VPERM2I128 $0x13, AA1, BB1, CC0; VPERM2I128 $0x13, CC1, DD1, DD0
VPXOR (2*32)(inp), AA0, AA0; VPXOR (3*32)(inp), BB0, BB0; VPXOR (4*32)(inp), CC0, CC0; VPXOR (5*32)(inp), DD0, DD0
VMOVDQU AA0, (2*32)(oup); VMOVDQU BB0, (3*32)(oup); VMOVDQU CC0, (4*32)(oup); VMOVDQU DD0, (5*32)(oup)
VPERM2I128 $0x02, AA2, BB2, AA0; VPERM2I128 $0x02, CC2, DD2, BB0; VPERM2I128 $0x13, AA2, BB2, CC0; VPERM2I128 $0x13, CC2, DD2, DD0
VPXOR (6*32)(inp), AA0, AA0; VPXOR (7*32)(inp), BB0, BB0; VPXOR (8*32)(inp), CC0, CC0; VPXOR (9*32)(inp), DD0, DD0
VMOVDQU AA0, (6*32)(oup); VMOVDQU BB0, (7*32)(oup); VMOVDQU CC0, (8*32)(oup); VMOVDQU DD0, (9*32)(oup)
MOVQ $320, itr1
SUBQ $320, inl
LEAQ 320(inp), inp
VPERM2I128 $0x02, AA3, BB3, AA0; VPERM2I128 $0x02, CC3, DD3, BB0; VPERM2I128 $0x13, AA3, BB3, CC0; VPERM2I128 $0x13, CC3, DD3, DD0
CMPQ inl, $128
JBE sealAVX2SealHash
VPXOR (0*32)(inp), AA0, AA0; VPXOR (1*32)(inp), BB0, BB0; VPXOR (2*32)(inp), CC0, CC0; VPXOR (3*32)(inp), DD0, DD0
VMOVDQU AA0, (10*32)(oup); VMOVDQU BB0, (11*32)(oup); VMOVDQU CC0, (12*32)(oup); VMOVDQU DD0, (13*32)(oup)
SUBQ $128, inl
LEAQ 128(inp), inp
MOVQ $8, itr1
MOVQ $2, itr2
CMPQ inl, $128
JBE sealAVX2Tail128
CMPQ inl, $256
JBE sealAVX2Tail256
CMPQ inl, $384
JBE sealAVX2Tail384
CMPQ inl, $512
JBE sealAVX2Tail512
// We have 448 bytes to hash, but main loop hashes 512 bytes at a time - perform some rounds, before the main loop
VMOVDQA ·chacha20Constants<>(SB), AA0; VMOVDQA AA0, AA1; VMOVDQA AA0, AA2; VMOVDQA AA0, AA3
VMOVDQA state1StoreAVX2, BB0; VMOVDQA BB0, BB1; VMOVDQA BB0, BB2; VMOVDQA BB0, BB3
VMOVDQA state2StoreAVX2, CC0; VMOVDQA CC0, CC1; VMOVDQA CC0, CC2; VMOVDQA CC0, CC3
VMOVDQA ctr3StoreAVX2, DD0
VPADDD ·avx2IncMask<>(SB), DD0, DD0; VPADDD ·avx2IncMask<>(SB), DD0, DD1; VPADDD ·avx2IncMask<>(SB), DD1, DD2; VPADDD ·avx2IncMask<>(SB), DD2, DD3
VMOVDQA DD0, ctr0StoreAVX2; VMOVDQA DD1, ctr1StoreAVX2; VMOVDQA DD2, ctr2StoreAVX2; VMOVDQA DD3, ctr3StoreAVX2
VMOVDQA CC3, tmpStoreAVX2
chachaQR_AVX2(AA0, BB0, CC0, DD0, CC3); chachaQR_AVX2(AA1, BB1, CC1, DD1, CC3); chachaQR_AVX2(AA2, BB2, CC2, DD2, CC3)
VMOVDQA tmpStoreAVX2, CC3
VMOVDQA CC1, tmpStoreAVX2
chachaQR_AVX2(AA3, BB3, CC3, DD3, CC1)
VMOVDQA tmpStoreAVX2, CC1
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $12, DD0, DD0, DD0
VPALIGNR $4, BB1, BB1, BB1; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $12, DD1, DD1, DD1
VPALIGNR $4, BB2, BB2, BB2; VPALIGNR $8, CC2, CC2, CC2; VPALIGNR $12, DD2, DD2, DD2
VPALIGNR $4, BB3, BB3, BB3; VPALIGNR $8, CC3, CC3, CC3; VPALIGNR $12, DD3, DD3, DD3
VMOVDQA CC3, tmpStoreAVX2
chachaQR_AVX2(AA0, BB0, CC0, DD0, CC3); chachaQR_AVX2(AA1, BB1, CC1, DD1, CC3); chachaQR_AVX2(AA2, BB2, CC2, DD2, CC3)
VMOVDQA tmpStoreAVX2, CC3
VMOVDQA CC1, tmpStoreAVX2
chachaQR_AVX2(AA3, BB3, CC3, DD3, CC1)
VMOVDQA tmpStoreAVX2, CC1
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $4, DD0, DD0, DD0
VPALIGNR $12, BB1, BB1, BB1; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $4, DD1, DD1, DD1
VPALIGNR $12, BB2, BB2, BB2; VPALIGNR $8, CC2, CC2, CC2; VPALIGNR $4, DD2, DD2, DD2
VPALIGNR $12, BB3, BB3, BB3; VPALIGNR $8, CC3, CC3, CC3; VPALIGNR $4, DD3, DD3, DD3
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol16<>(SB), DD0, DD0; VPSHUFB ·rol16<>(SB), DD1, DD1; VPSHUFB ·rol16<>(SB), DD2, DD2; VPSHUFB ·rol16<>(SB), DD3, DD3
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $12, BB0, CC3; VPSRLD $20, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $12, BB1, CC3; VPSRLD $20, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $12, BB2, CC3; VPSRLD $20, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $12, BB3, CC3; VPSRLD $20, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
SUBQ $16, oup // Adjust the pointer
MOVQ $9, itr1
JMP sealAVX2InternalLoopStart
sealAVX2MainLoop:
// Load state, increment counter blocks, store the incremented counters
VMOVDQU ·chacha20Constants<>(SB), AA0; VMOVDQA AA0, AA1; VMOVDQA AA0, AA2; VMOVDQA AA0, AA3
VMOVDQA state1StoreAVX2, BB0; VMOVDQA BB0, BB1; VMOVDQA BB0, BB2; VMOVDQA BB0, BB3
VMOVDQA state2StoreAVX2, CC0; VMOVDQA CC0, CC1; VMOVDQA CC0, CC2; VMOVDQA CC0, CC3
VMOVDQA ctr3StoreAVX2, DD0; VPADDD ·avx2IncMask<>(SB), DD0, DD0; VPADDD ·avx2IncMask<>(SB), DD0, DD1; VPADDD ·avx2IncMask<>(SB), DD1, DD2; VPADDD ·avx2IncMask<>(SB), DD2, DD3
VMOVDQA DD0, ctr0StoreAVX2; VMOVDQA DD1, ctr1StoreAVX2; VMOVDQA DD2, ctr2StoreAVX2; VMOVDQA DD3, ctr3StoreAVX2
MOVQ $10, itr1
sealAVX2InternalLoop:
polyAdd(0*8(oup))
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
polyMulStage1_AVX2
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol16<>(SB), DD0, DD0; VPSHUFB ·rol16<>(SB), DD1, DD1; VPSHUFB ·rol16<>(SB), DD2, DD2; VPSHUFB ·rol16<>(SB), DD3, DD3
polyMulStage2_AVX2
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
polyMulStage3_AVX2
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $12, BB0, CC3; VPSRLD $20, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $12, BB1, CC3; VPSRLD $20, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $12, BB2, CC3; VPSRLD $20, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $12, BB3, CC3; VPSRLD $20, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
polyMulReduceStage
sealAVX2InternalLoopStart:
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol8<>(SB), DD0, DD0; VPSHUFB ·rol8<>(SB), DD1, DD1; VPSHUFB ·rol8<>(SB), DD2, DD2; VPSHUFB ·rol8<>(SB), DD3, DD3
polyAdd(2*8(oup))
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
polyMulStage1_AVX2
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $7, BB0, CC3; VPSRLD $25, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $7, BB1, CC3; VPSRLD $25, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $7, BB2, CC3; VPSRLD $25, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $7, BB3, CC3; VPSRLD $25, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
polyMulStage2_AVX2
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $4, BB1, BB1, BB1; VPALIGNR $4, BB2, BB2, BB2; VPALIGNR $4, BB3, BB3, BB3
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2; VPALIGNR $8, CC3, CC3, CC3
VPALIGNR $12, DD0, DD0, DD0; VPALIGNR $12, DD1, DD1, DD1; VPALIGNR $12, DD2, DD2, DD2; VPALIGNR $12, DD3, DD3, DD3
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
polyMulStage3_AVX2
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol16<>(SB), DD0, DD0; VPSHUFB ·rol16<>(SB), DD1, DD1; VPSHUFB ·rol16<>(SB), DD2, DD2; VPSHUFB ·rol16<>(SB), DD3, DD3
polyMulReduceStage
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
polyAdd(4*8(oup))
LEAQ (6*8)(oup), oup
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $12, BB0, CC3; VPSRLD $20, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $12, BB1, CC3; VPSRLD $20, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $12, BB2, CC3; VPSRLD $20, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $12, BB3, CC3; VPSRLD $20, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
polyMulStage1_AVX2
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
polyMulStage2_AVX2
VPSHUFB ·rol8<>(SB), DD0, DD0; VPSHUFB ·rol8<>(SB), DD1, DD1; VPSHUFB ·rol8<>(SB), DD2, DD2; VPSHUFB ·rol8<>(SB), DD3, DD3
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
polyMulStage3_AVX2
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $7, BB0, CC3; VPSRLD $25, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $7, BB1, CC3; VPSRLD $25, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $7, BB2, CC3; VPSRLD $25, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $7, BB3, CC3; VPSRLD $25, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
polyMulReduceStage
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $12, BB1, BB1, BB1; VPALIGNR $12, BB2, BB2, BB2; VPALIGNR $12, BB3, BB3, BB3
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2; VPALIGNR $8, CC3, CC3, CC3
VPALIGNR $4, DD0, DD0, DD0; VPALIGNR $4, DD1, DD1, DD1; VPALIGNR $4, DD2, DD2, DD2; VPALIGNR $4, DD3, DD3, DD3
DECQ itr1
JNE sealAVX2InternalLoop
VPADDD ·chacha20Constants<>(SB), AA0, AA0; VPADDD ·chacha20Constants<>(SB), AA1, AA1; VPADDD ·chacha20Constants<>(SB), AA2, AA2; VPADDD ·chacha20Constants<>(SB), AA3, AA3
VPADDD state1StoreAVX2, BB0, BB0; VPADDD state1StoreAVX2, BB1, BB1; VPADDD state1StoreAVX2, BB2, BB2; VPADDD state1StoreAVX2, BB3, BB3
VPADDD state2StoreAVX2, CC0, CC0; VPADDD state2StoreAVX2, CC1, CC1; VPADDD state2StoreAVX2, CC2, CC2; VPADDD state2StoreAVX2, CC3, CC3
VPADDD ctr0StoreAVX2, DD0, DD0; VPADDD ctr1StoreAVX2, DD1, DD1; VPADDD ctr2StoreAVX2, DD2, DD2; VPADDD ctr3StoreAVX2, DD3, DD3
VMOVDQA CC3, tmpStoreAVX2
// We only hashed 480 of the 512 bytes available - hash the remaining 32 here
polyAdd(0*8(oup))
polyMulAVX2
LEAQ (4*8)(oup), oup
VPERM2I128 $0x02, AA0, BB0, CC3; VPERM2I128 $0x13, AA0, BB0, BB0; VPERM2I128 $0x02, CC0, DD0, AA0; VPERM2I128 $0x13, CC0, DD0, CC0
VPXOR (0*32)(inp), CC3, CC3; VPXOR (1*32)(inp), AA0, AA0; VPXOR (2*32)(inp), BB0, BB0; VPXOR (3*32)(inp), CC0, CC0
VMOVDQU CC3, (0*32)(oup); VMOVDQU AA0, (1*32)(oup); VMOVDQU BB0, (2*32)(oup); VMOVDQU CC0, (3*32)(oup)
VPERM2I128 $0x02, AA1, BB1, AA0; VPERM2I128 $0x02, CC1, DD1, BB0; VPERM2I128 $0x13, AA1, BB1, CC0; VPERM2I128 $0x13, CC1, DD1, DD0
VPXOR (4*32)(inp), AA0, AA0; VPXOR (5*32)(inp), BB0, BB0; VPXOR (6*32)(inp), CC0, CC0; VPXOR (7*32)(inp), DD0, DD0
VMOVDQU AA0, (4*32)(oup); VMOVDQU BB0, (5*32)(oup); VMOVDQU CC0, (6*32)(oup); VMOVDQU DD0, (7*32)(oup)
// and here
polyAdd(-2*8(oup))
polyMulAVX2
VPERM2I128 $0x02, AA2, BB2, AA0; VPERM2I128 $0x02, CC2, DD2, BB0; VPERM2I128 $0x13, AA2, BB2, CC0; VPERM2I128 $0x13, CC2, DD2, DD0
VPXOR (8*32)(inp), AA0, AA0; VPXOR (9*32)(inp), BB0, BB0; VPXOR (10*32)(inp), CC0, CC0; VPXOR (11*32)(inp), DD0, DD0
VMOVDQU AA0, (8*32)(oup); VMOVDQU BB0, (9*32)(oup); VMOVDQU CC0, (10*32)(oup); VMOVDQU DD0, (11*32)(oup)
VPERM2I128 $0x02, AA3, BB3, AA0; VPERM2I128 $0x02, tmpStoreAVX2, DD3, BB0; VPERM2I128 $0x13, AA3, BB3, CC0; VPERM2I128 $0x13, tmpStoreAVX2, DD3, DD0
VPXOR (12*32)(inp), AA0, AA0; VPXOR (13*32)(inp), BB0, BB0; VPXOR (14*32)(inp), CC0, CC0; VPXOR (15*32)(inp), DD0, DD0
VMOVDQU AA0, (12*32)(oup); VMOVDQU BB0, (13*32)(oup); VMOVDQU CC0, (14*32)(oup); VMOVDQU DD0, (15*32)(oup)
LEAQ (32*16)(inp), inp
SUBQ $(32*16), inl
CMPQ inl, $512
JG sealAVX2MainLoop
// Tail can only hash 480 bytes
polyAdd(0*8(oup))
polyMulAVX2
polyAdd(2*8(oup))
polyMulAVX2
LEAQ 32(oup), oup
MOVQ $10, itr1
MOVQ $0, itr2
CMPQ inl, $128
JBE sealAVX2Tail128
CMPQ inl, $256
JBE sealAVX2Tail256
CMPQ inl, $384
JBE sealAVX2Tail384
JMP sealAVX2Tail512
// ----------------------------------------------------------------------------
// Special optimization for buffers smaller than 193 bytes
seal192AVX2:
// For up to 192 bytes of ciphertext and 64 bytes for the poly key, we process four blocks
VMOVDQA AA0, AA1
VMOVDQA BB0, BB1
VMOVDQA CC0, CC1
VPADDD ·avx2IncMask<>(SB), DD0, DD1
VMOVDQA AA0, AA2
VMOVDQA BB0, BB2
VMOVDQA CC0, CC2
VMOVDQA DD0, DD2
VMOVDQA DD1, TT3
MOVQ $10, itr2
sealAVX2192InnerCipherLoop:
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0)
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $4, BB1, BB1, BB1
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1
VPALIGNR $12, DD0, DD0, DD0; VPALIGNR $12, DD1, DD1, DD1
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0)
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $12, BB1, BB1, BB1
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1
VPALIGNR $4, DD0, DD0, DD0; VPALIGNR $4, DD1, DD1, DD1
DECQ itr2
JNE sealAVX2192InnerCipherLoop
VPADDD AA2, AA0, AA0; VPADDD AA2, AA1, AA1
VPADDD BB2, BB0, BB0; VPADDD BB2, BB1, BB1
VPADDD CC2, CC0, CC0; VPADDD CC2, CC1, CC1
VPADDD DD2, DD0, DD0; VPADDD TT3, DD1, DD1
VPERM2I128 $0x02, AA0, BB0, TT0
// Clamp and store poly key
VPAND ·polyClampMask<>(SB), TT0, TT0
VMOVDQA TT0, rsStoreAVX2
// Stream for up to 192 bytes
VPERM2I128 $0x13, AA0, BB0, AA0
VPERM2I128 $0x13, CC0, DD0, BB0
VPERM2I128 $0x02, AA1, BB1, CC0
VPERM2I128 $0x02, CC1, DD1, DD0
VPERM2I128 $0x13, AA1, BB1, AA1
VPERM2I128 $0x13, CC1, DD1, BB1
sealAVX2ShortSeal:
// Hash aad
MOVQ ad_len+80(FP), itr2
CALL polyHashADInternal<>(SB)
XORQ itr1, itr1
sealAVX2SealHash:
// itr1 holds the number of bytes encrypted but not yet hashed
CMPQ itr1, $16
JB sealAVX2ShortSealLoop
polyAdd(0(oup))
polyMul
SUBQ $16, itr1
ADDQ $16, oup
JMP sealAVX2SealHash
sealAVX2ShortSealLoop:
CMPQ inl, $32
JB sealAVX2ShortTail32
SUBQ $32, inl
// Load for encryption
VPXOR (inp), AA0, AA0
VMOVDQU AA0, (oup)
LEAQ (1*32)(inp), inp
// Now can hash
polyAdd(0*8(oup))
polyMulAVX2
polyAdd(2*8(oup))
polyMulAVX2
LEAQ (1*32)(oup), oup
// Shift stream left
VMOVDQA BB0, AA0
VMOVDQA CC0, BB0
VMOVDQA DD0, CC0
VMOVDQA AA1, DD0
VMOVDQA BB1, AA1
VMOVDQA CC1, BB1
VMOVDQA DD1, CC1
VMOVDQA AA2, DD1
VMOVDQA BB2, AA2
JMP sealAVX2ShortSealLoop
sealAVX2ShortTail32:
CMPQ inl, $16
VMOVDQA A0, A1
JB sealAVX2ShortDone
SUBQ $16, inl
// Load for encryption
VPXOR (inp), A0, T0
VMOVDQU T0, (oup)
LEAQ (1*16)(inp), inp
// Hash
polyAdd(0*8(oup))
polyMulAVX2
LEAQ (1*16)(oup), oup
VPERM2I128 $0x11, AA0, AA0, AA0
VMOVDQA A0, A1
sealAVX2ShortDone:
VZEROUPPER
JMP sealSSETail
// ----------------------------------------------------------------------------
// Special optimization for buffers smaller than 321 bytes
seal320AVX2:
// For up to 320 bytes of ciphertext and 64 bytes for the poly key, we process six blocks
VMOVDQA AA0, AA1; VMOVDQA BB0, BB1; VMOVDQA CC0, CC1; VPADDD ·avx2IncMask<>(SB), DD0, DD1
VMOVDQA AA0, AA2; VMOVDQA BB0, BB2; VMOVDQA CC0, CC2; VPADDD ·avx2IncMask<>(SB), DD1, DD2
VMOVDQA BB0, TT1; VMOVDQA CC0, TT2; VMOVDQA DD0, TT3
MOVQ $10, itr2
sealAVX2320InnerCipherLoop:
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0); chachaQR_AVX2(AA2, BB2, CC2, DD2, TT0)
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $4, BB1, BB1, BB1; VPALIGNR $4, BB2, BB2, BB2
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2
VPALIGNR $12, DD0, DD0, DD0; VPALIGNR $12, DD1, DD1, DD1; VPALIGNR $12, DD2, DD2, DD2
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0); chachaQR_AVX2(AA2, BB2, CC2, DD2, TT0)
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $12, BB1, BB1, BB1; VPALIGNR $12, BB2, BB2, BB2
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2
VPALIGNR $4, DD0, DD0, DD0; VPALIGNR $4, DD1, DD1, DD1; VPALIGNR $4, DD2, DD2, DD2
DECQ itr2
JNE sealAVX2320InnerCipherLoop
VMOVDQA ·chacha20Constants<>(SB), TT0
VPADDD TT0, AA0, AA0; VPADDD TT0, AA1, AA1; VPADDD TT0, AA2, AA2
VPADDD TT1, BB0, BB0; VPADDD TT1, BB1, BB1; VPADDD TT1, BB2, BB2
VPADDD TT2, CC0, CC0; VPADDD TT2, CC1, CC1; VPADDD TT2, CC2, CC2
VMOVDQA ·avx2IncMask<>(SB), TT0
VPADDD TT3, DD0, DD0; VPADDD TT0, TT3, TT3
VPADDD TT3, DD1, DD1; VPADDD TT0, TT3, TT3
VPADDD TT3, DD2, DD2
// Clamp and store poly key
VPERM2I128 $0x02, AA0, BB0, TT0
VPAND ·polyClampMask<>(SB), TT0, TT0
VMOVDQA TT0, rsStoreAVX2
// Stream for up to 320 bytes
VPERM2I128 $0x13, AA0, BB0, AA0
VPERM2I128 $0x13, CC0, DD0, BB0
VPERM2I128 $0x02, AA1, BB1, CC0
VPERM2I128 $0x02, CC1, DD1, DD0
VPERM2I128 $0x13, AA1, BB1, AA1
VPERM2I128 $0x13, CC1, DD1, BB1
VPERM2I128 $0x02, AA2, BB2, CC1
VPERM2I128 $0x02, CC2, DD2, DD1
VPERM2I128 $0x13, AA2, BB2, AA2
VPERM2I128 $0x13, CC2, DD2, BB2
JMP sealAVX2ShortSeal
// ----------------------------------------------------------------------------
// Special optimization for the last 128 bytes of ciphertext
sealAVX2Tail128:
// Need to decrypt up to 128 bytes - prepare two blocks
// If we got here after the main loop - there are 512 encrypted bytes waiting to be hashed
// If we got here before the main loop - there are 448 encrpyred bytes waiting to be hashed
VMOVDQA ·chacha20Constants<>(SB), AA0
VMOVDQA state1StoreAVX2, BB0
VMOVDQA state2StoreAVX2, CC0
VMOVDQA ctr3StoreAVX2, DD0
VPADDD ·avx2IncMask<>(SB), DD0, DD0
VMOVDQA DD0, DD1
sealAVX2Tail128LoopA:
polyAdd(0(oup))
polyMul
LEAQ 16(oup), oup
sealAVX2Tail128LoopB:
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0)
polyAdd(0(oup))
polyMul
VPALIGNR $4, BB0, BB0, BB0
VPALIGNR $8, CC0, CC0, CC0
VPALIGNR $12, DD0, DD0, DD0
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0)
polyAdd(16(oup))
polyMul
LEAQ 32(oup), oup
VPALIGNR $12, BB0, BB0, BB0
VPALIGNR $8, CC0, CC0, CC0
VPALIGNR $4, DD0, DD0, DD0
DECQ itr1
JG sealAVX2Tail128LoopA
DECQ itr2
JGE sealAVX2Tail128LoopB
VPADDD ·chacha20Constants<>(SB), AA0, AA1
VPADDD state1StoreAVX2, BB0, BB1
VPADDD state2StoreAVX2, CC0, CC1
VPADDD DD1, DD0, DD1
VPERM2I128 $0x02, AA1, BB1, AA0
VPERM2I128 $0x02, CC1, DD1, BB0
VPERM2I128 $0x13, AA1, BB1, CC0
VPERM2I128 $0x13, CC1, DD1, DD0
JMP sealAVX2ShortSealLoop
// ----------------------------------------------------------------------------
// Special optimization for the last 256 bytes of ciphertext
sealAVX2Tail256:
// Need to decrypt up to 256 bytes - prepare two blocks
// If we got here after the main loop - there are 512 encrypted bytes waiting to be hashed
// If we got here before the main loop - there are 448 encrpyred bytes waiting to be hashed
VMOVDQA ·chacha20Constants<>(SB), AA0; VMOVDQA ·chacha20Constants<>(SB), AA1
VMOVDQA state1StoreAVX2, BB0; VMOVDQA state1StoreAVX2, BB1
VMOVDQA state2StoreAVX2, CC0; VMOVDQA state2StoreAVX2, CC1
VMOVDQA ctr3StoreAVX2, DD0
VPADDD ·avx2IncMask<>(SB), DD0, DD0
VPADDD ·avx2IncMask<>(SB), DD0, DD1
VMOVDQA DD0, TT1
VMOVDQA DD1, TT2
sealAVX2Tail256LoopA:
polyAdd(0(oup))
polyMul
LEAQ 16(oup), oup
sealAVX2Tail256LoopB:
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0)
polyAdd(0(oup))
polyMul
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $4, BB1, BB1, BB1
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1
VPALIGNR $12, DD0, DD0, DD0; VPALIGNR $12, DD1, DD1, DD1
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0)
polyAdd(16(oup))
polyMul
LEAQ 32(oup), oup
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $12, BB1, BB1, BB1
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1
VPALIGNR $4, DD0, DD0, DD0; VPALIGNR $4, DD1, DD1, DD1
DECQ itr1
JG sealAVX2Tail256LoopA
DECQ itr2
JGE sealAVX2Tail256LoopB
VPADDD ·chacha20Constants<>(SB), AA0, AA0; VPADDD ·chacha20Constants<>(SB), AA1, AA1
VPADDD state1StoreAVX2, BB0, BB0; VPADDD state1StoreAVX2, BB1, BB1
VPADDD state2StoreAVX2, CC0, CC0; VPADDD state2StoreAVX2, CC1, CC1
VPADDD TT1, DD0, DD0; VPADDD TT2, DD1, DD1
VPERM2I128 $0x02, AA0, BB0, TT0
VPERM2I128 $0x02, CC0, DD0, TT1
VPERM2I128 $0x13, AA0, BB0, TT2
VPERM2I128 $0x13, CC0, DD0, TT3
VPXOR (0*32)(inp), TT0, TT0; VPXOR (1*32)(inp), TT1, TT1; VPXOR (2*32)(inp), TT2, TT2; VPXOR (3*32)(inp), TT3, TT3
VMOVDQU TT0, (0*32)(oup); VMOVDQU TT1, (1*32)(oup); VMOVDQU TT2, (2*32)(oup); VMOVDQU TT3, (3*32)(oup)
MOVQ $128, itr1
LEAQ 128(inp), inp
SUBQ $128, inl
VPERM2I128 $0x02, AA1, BB1, AA0
VPERM2I128 $0x02, CC1, DD1, BB0
VPERM2I128 $0x13, AA1, BB1, CC0
VPERM2I128 $0x13, CC1, DD1, DD0
JMP sealAVX2SealHash
// ----------------------------------------------------------------------------
// Special optimization for the last 384 bytes of ciphertext
sealAVX2Tail384:
// Need to decrypt up to 384 bytes - prepare two blocks
// If we got here after the main loop - there are 512 encrypted bytes waiting to be hashed
// If we got here before the main loop - there are 448 encrpyred bytes waiting to be hashed
VMOVDQA ·chacha20Constants<>(SB), AA0; VMOVDQA AA0, AA1; VMOVDQA AA0, AA2
VMOVDQA state1StoreAVX2, BB0; VMOVDQA BB0, BB1; VMOVDQA BB0, BB2
VMOVDQA state2StoreAVX2, CC0; VMOVDQA CC0, CC1; VMOVDQA CC0, CC2
VMOVDQA ctr3StoreAVX2, DD0
VPADDD ·avx2IncMask<>(SB), DD0, DD0; VPADDD ·avx2IncMask<>(SB), DD0, DD1; VPADDD ·avx2IncMask<>(SB), DD1, DD2
VMOVDQA DD0, TT1; VMOVDQA DD1, TT2; VMOVDQA DD2, TT3
sealAVX2Tail384LoopA:
polyAdd(0(oup))
polyMul
LEAQ 16(oup), oup
sealAVX2Tail384LoopB:
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0); chachaQR_AVX2(AA2, BB2, CC2, DD2, TT0)
polyAdd(0(oup))
polyMul
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $4, BB1, BB1, BB1; VPALIGNR $4, BB2, BB2, BB2
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2
VPALIGNR $12, DD0, DD0, DD0; VPALIGNR $12, DD1, DD1, DD1; VPALIGNR $12, DD2, DD2, DD2
chachaQR_AVX2(AA0, BB0, CC0, DD0, TT0); chachaQR_AVX2(AA1, BB1, CC1, DD1, TT0); chachaQR_AVX2(AA2, BB2, CC2, DD2, TT0)
polyAdd(16(oup))
polyMul
LEAQ 32(oup), oup
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $12, BB1, BB1, BB1; VPALIGNR $12, BB2, BB2, BB2
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2
VPALIGNR $4, DD0, DD0, DD0; VPALIGNR $4, DD1, DD1, DD1; VPALIGNR $4, DD2, DD2, DD2
DECQ itr1
JG sealAVX2Tail384LoopA
DECQ itr2
JGE sealAVX2Tail384LoopB
VPADDD ·chacha20Constants<>(SB), AA0, AA0; VPADDD ·chacha20Constants<>(SB), AA1, AA1; VPADDD ·chacha20Constants<>(SB), AA2, AA2
VPADDD state1StoreAVX2, BB0, BB0; VPADDD state1StoreAVX2, BB1, BB1; VPADDD state1StoreAVX2, BB2, BB2
VPADDD state2StoreAVX2, CC0, CC0; VPADDD state2StoreAVX2, CC1, CC1; VPADDD state2StoreAVX2, CC2, CC2
VPADDD TT1, DD0, DD0; VPADDD TT2, DD1, DD1; VPADDD TT3, DD2, DD2
VPERM2I128 $0x02, AA0, BB0, TT0
VPERM2I128 $0x02, CC0, DD0, TT1
VPERM2I128 $0x13, AA0, BB0, TT2
VPERM2I128 $0x13, CC0, DD0, TT3
VPXOR (0*32)(inp), TT0, TT0; VPXOR (1*32)(inp), TT1, TT1; VPXOR (2*32)(inp), TT2, TT2; VPXOR (3*32)(inp), TT3, TT3
VMOVDQU TT0, (0*32)(oup); VMOVDQU TT1, (1*32)(oup); VMOVDQU TT2, (2*32)(oup); VMOVDQU TT3, (3*32)(oup)
VPERM2I128 $0x02, AA1, BB1, TT0
VPERM2I128 $0x02, CC1, DD1, TT1
VPERM2I128 $0x13, AA1, BB1, TT2
VPERM2I128 $0x13, CC1, DD1, TT3
VPXOR (4*32)(inp), TT0, TT0; VPXOR (5*32)(inp), TT1, TT1; VPXOR (6*32)(inp), TT2, TT2; VPXOR (7*32)(inp), TT3, TT3
VMOVDQU TT0, (4*32)(oup); VMOVDQU TT1, (5*32)(oup); VMOVDQU TT2, (6*32)(oup); VMOVDQU TT3, (7*32)(oup)
MOVQ $256, itr1
LEAQ 256(inp), inp
SUBQ $256, inl
VPERM2I128 $0x02, AA2, BB2, AA0
VPERM2I128 $0x02, CC2, DD2, BB0
VPERM2I128 $0x13, AA2, BB2, CC0
VPERM2I128 $0x13, CC2, DD2, DD0
JMP sealAVX2SealHash
// ----------------------------------------------------------------------------
// Special optimization for the last 512 bytes of ciphertext
sealAVX2Tail512:
// Need to decrypt up to 512 bytes - prepare two blocks
// If we got here after the main loop - there are 512 encrypted bytes waiting to be hashed
// If we got here before the main loop - there are 448 encrpyred bytes waiting to be hashed
VMOVDQA ·chacha20Constants<>(SB), AA0; VMOVDQA AA0, AA1; VMOVDQA AA0, AA2; VMOVDQA AA0, AA3
VMOVDQA state1StoreAVX2, BB0; VMOVDQA BB0, BB1; VMOVDQA BB0, BB2; VMOVDQA BB0, BB3
VMOVDQA state2StoreAVX2, CC0; VMOVDQA CC0, CC1; VMOVDQA CC0, CC2; VMOVDQA CC0, CC3
VMOVDQA ctr3StoreAVX2, DD0
VPADDD ·avx2IncMask<>(SB), DD0, DD0; VPADDD ·avx2IncMask<>(SB), DD0, DD1; VPADDD ·avx2IncMask<>(SB), DD1, DD2; VPADDD ·avx2IncMask<>(SB), DD2, DD3
VMOVDQA DD0, ctr0StoreAVX2; VMOVDQA DD1, ctr1StoreAVX2; VMOVDQA DD2, ctr2StoreAVX2; VMOVDQA DD3, ctr3StoreAVX2
sealAVX2Tail512LoopA:
polyAdd(0(oup))
polyMul
LEAQ 16(oup), oup
sealAVX2Tail512LoopB:
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol16<>(SB), DD0, DD0; VPSHUFB ·rol16<>(SB), DD1, DD1; VPSHUFB ·rol16<>(SB), DD2, DD2; VPSHUFB ·rol16<>(SB), DD3, DD3
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $12, BB0, CC3; VPSRLD $20, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $12, BB1, CC3; VPSRLD $20, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $12, BB2, CC3; VPSRLD $20, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $12, BB3, CC3; VPSRLD $20, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
polyAdd(0*8(oup))
polyMulAVX2
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol8<>(SB), DD0, DD0; VPSHUFB ·rol8<>(SB), DD1, DD1; VPSHUFB ·rol8<>(SB), DD2, DD2; VPSHUFB ·rol8<>(SB), DD3, DD3
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $7, BB0, CC3; VPSRLD $25, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $7, BB1, CC3; VPSRLD $25, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $7, BB2, CC3; VPSRLD $25, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $7, BB3, CC3; VPSRLD $25, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
VPALIGNR $4, BB0, BB0, BB0; VPALIGNR $4, BB1, BB1, BB1; VPALIGNR $4, BB2, BB2, BB2; VPALIGNR $4, BB3, BB3, BB3
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2; VPALIGNR $8, CC3, CC3, CC3
VPALIGNR $12, DD0, DD0, DD0; VPALIGNR $12, DD1, DD1, DD1; VPALIGNR $12, DD2, DD2, DD2; VPALIGNR $12, DD3, DD3, DD3
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol16<>(SB), DD0, DD0; VPSHUFB ·rol16<>(SB), DD1, DD1; VPSHUFB ·rol16<>(SB), DD2, DD2; VPSHUFB ·rol16<>(SB), DD3, DD3
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
polyAdd(2*8(oup))
polyMulAVX2
LEAQ (4*8)(oup), oup
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $12, BB0, CC3; VPSRLD $20, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $12, BB1, CC3; VPSRLD $20, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $12, BB2, CC3; VPSRLD $20, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $12, BB3, CC3; VPSRLD $20, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
VPADDD BB0, AA0, AA0; VPADDD BB1, AA1, AA1; VPADDD BB2, AA2, AA2; VPADDD BB3, AA3, AA3
VPXOR AA0, DD0, DD0; VPXOR AA1, DD1, DD1; VPXOR AA2, DD2, DD2; VPXOR AA3, DD3, DD3
VPSHUFB ·rol8<>(SB), DD0, DD0; VPSHUFB ·rol8<>(SB), DD1, DD1; VPSHUFB ·rol8<>(SB), DD2, DD2; VPSHUFB ·rol8<>(SB), DD3, DD3
VPADDD DD0, CC0, CC0; VPADDD DD1, CC1, CC1; VPADDD DD2, CC2, CC2; VPADDD DD3, CC3, CC3
VPXOR CC0, BB0, BB0; VPXOR CC1, BB1, BB1; VPXOR CC2, BB2, BB2; VPXOR CC3, BB3, BB3
VMOVDQA CC3, tmpStoreAVX2
VPSLLD $7, BB0, CC3; VPSRLD $25, BB0, BB0; VPXOR CC3, BB0, BB0
VPSLLD $7, BB1, CC3; VPSRLD $25, BB1, BB1; VPXOR CC3, BB1, BB1
VPSLLD $7, BB2, CC3; VPSRLD $25, BB2, BB2; VPXOR CC3, BB2, BB2
VPSLLD $7, BB3, CC3; VPSRLD $25, BB3, BB3; VPXOR CC3, BB3, BB3
VMOVDQA tmpStoreAVX2, CC3
VPALIGNR $12, BB0, BB0, BB0; VPALIGNR $12, BB1, BB1, BB1; VPALIGNR $12, BB2, BB2, BB2; VPALIGNR $12, BB3, BB3, BB3
VPALIGNR $8, CC0, CC0, CC0; VPALIGNR $8, CC1, CC1, CC1; VPALIGNR $8, CC2, CC2, CC2; VPALIGNR $8, CC3, CC3, CC3
VPALIGNR $4, DD0, DD0, DD0; VPALIGNR $4, DD1, DD1, DD1; VPALIGNR $4, DD2, DD2, DD2; VPALIGNR $4, DD3, DD3, DD3
DECQ itr1
JG sealAVX2Tail512LoopA
DECQ itr2
JGE sealAVX2Tail512LoopB
VPADDD ·chacha20Constants<>(SB), AA0, AA0; VPADDD ·chacha20Constants<>(SB), AA1, AA1; VPADDD ·chacha20Constants<>(SB), AA2, AA2; VPADDD ·chacha20Constants<>(SB), AA3, AA3
VPADDD state1StoreAVX2, BB0, BB0; VPADDD state1StoreAVX2, BB1, BB1; VPADDD state1StoreAVX2, BB2, BB2; VPADDD state1StoreAVX2, BB3, BB3
VPADDD state2StoreAVX2, CC0, CC0; VPADDD state2StoreAVX2, CC1, CC1; VPADDD state2StoreAVX2, CC2, CC2; VPADDD state2StoreAVX2, CC3, CC3
VPADDD ctr0StoreAVX2, DD0, DD0; VPADDD ctr1StoreAVX2, DD1, DD1; VPADDD ctr2StoreAVX2, DD2, DD2; VPADDD ctr3StoreAVX2, DD3, DD3
VMOVDQA CC3, tmpStoreAVX2
VPERM2I128 $0x02, AA0, BB0, CC3
VPXOR (0*32)(inp), CC3, CC3
VMOVDQU CC3, (0*32)(oup)
VPERM2I128 $0x02, CC0, DD0, CC3
VPXOR (1*32)(inp), CC3, CC3
VMOVDQU CC3, (1*32)(oup)
VPERM2I128 $0x13, AA0, BB0, CC3
VPXOR (2*32)(inp), CC3, CC3
VMOVDQU CC3, (2*32)(oup)
VPERM2I128 $0x13, CC0, DD0, CC3
VPXOR (3*32)(inp), CC3, CC3
VMOVDQU CC3, (3*32)(oup)
VPERM2I128 $0x02, AA1, BB1, AA0
VPERM2I128 $0x02, CC1, DD1, BB0
VPERM2I128 $0x13, AA1, BB1, CC0
VPERM2I128 $0x13, CC1, DD1, DD0
VPXOR (4*32)(inp), AA0, AA0; VPXOR (5*32)(inp), BB0, BB0; VPXOR (6*32)(inp), CC0, CC0; VPXOR (7*32)(inp), DD0, DD0
VMOVDQU AA0, (4*32)(oup); VMOVDQU BB0, (5*32)(oup); VMOVDQU CC0, (6*32)(oup); VMOVDQU DD0, (7*32)(oup)
VPERM2I128 $0x02, AA2, BB2, AA0
VPERM2I128 $0x02, CC2, DD2, BB0
VPERM2I128 $0x13, AA2, BB2, CC0
VPERM2I128 $0x13, CC2, DD2, DD0
VPXOR (8*32)(inp), AA0, AA0; VPXOR (9*32)(inp), BB0, BB0; VPXOR (10*32)(inp), CC0, CC0; VPXOR (11*32)(inp), DD0, DD0
VMOVDQU AA0, (8*32)(oup); VMOVDQU BB0, (9*32)(oup); VMOVDQU CC0, (10*32)(oup); VMOVDQU DD0, (11*32)(oup)
MOVQ $384, itr1
LEAQ 384(inp), inp
SUBQ $384, inl
VPERM2I128 $0x02, AA3, BB3, AA0
VPERM2I128 $0x02, tmpStoreAVX2, DD3, BB0
VPERM2I128 $0x13, AA3, BB3, CC0
VPERM2I128 $0x13, tmpStoreAVX2, DD3, DD0
JMP sealAVX2SealHash
// func cpuid(eaxArg, ecxArg uint32) (eax, ebx, ecx, edx uint32)
TEXT ·cpuid(SB), NOSPLIT, $0-24
MOVL eaxArg+0(FP), AX
MOVL ecxArg+4(FP), CX
CPUID
MOVL AX, eax+8(FP)
MOVL BX, ebx+12(FP)
MOVL CX, ecx+16(FP)
MOVL DX, edx+20(FP)
RET
// func xgetbv() (eax, edx uint32)
TEXT ·xgetbv(SB),NOSPLIT,$0-8
MOVL $0, CX
XGETBV
MOVL AX, eax+0(FP)
MOVL DX, edx+4(FP)
RET
|