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< a href = "gf256_8c.html" > Go to the documentation of this file.< / a > < div class = "fragment" > < div class = "line" > < a id = "l00001" name = "l00001" > < / a > < span class = "lineno" > 1< / span > < span class = "comment" > /*< / span > < / div >
< div class = "line" > < a id = "l00002" name = "l00002" > < / a > < span class = "lineno" > 2< / span > < span class = "comment" > * This file is part of the Aaru Data Preservation Suite.< / span > < / div >
< div class = "line" > < a id = "l00003" name = "l00003" > < / a > < span class = "lineno" > 3< / span > < span class = "comment" > * Copyright (c) 2019-2026 Natalia Portillo.< / span > < / div >
< div class = "line" > < a id = "l00004" name = "l00004" > < / a > < span class = "lineno" > 4< / span > < span class = "comment" > *< / span > < / div >
< div class = "line" > < a id = "l00005" name = "l00005" > < / a > < span class = "lineno" > 5< / span > < span class = "comment" > * This library is free software; you can redistribute it and/or modify< / span > < / div >
< div class = "line" > < a id = "l00006" name = "l00006" > < / a > < span class = "lineno" > 6< / span > < span class = "comment" > * it under the terms of the GNU Lesser General Public License as< / span > < / div >
< div class = "line" > < a id = "l00007" name = "l00007" > < / a > < span class = "lineno" > 7< / span > < span class = "comment" > * published by the Free Software Foundation; either version 2.1 of the< / span > < / div >
< div class = "line" > < a id = "l00008" name = "l00008" > < / a > < span class = "lineno" > 8< / span > < span class = "comment" > * License, or (at your option) any later version.< / span > < / div >
< div class = "line" > < a id = "l00009" name = "l00009" > < / a > < span class = "lineno" > 9< / span > < span class = "comment" > *< / span > < / div >
< div class = "line" > < a id = "l00010" name = "l00010" > < / a > < span class = "lineno" > 10< / span > < span class = "comment" > * This library is distributed in the hope that it will be useful, but< / span > < / div >
< div class = "line" > < a id = "l00011" name = "l00011" > < / a > < span class = "lineno" > 11< / span > < span class = "comment" > * WITHOUT ANY WARRANTY; without even the implied warranty of< / span > < / div >
< div class = "line" > < a id = "l00012" name = "l00012" > < / a > < span class = "lineno" > 12< / span > < span class = "comment" > * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU< / span > < / div >
< div class = "line" > < a id = "l00013" name = "l00013" > < / a > < span class = "lineno" > 13< / span > < span class = "comment" > * Lesser General Public License for more details.< / span > < / div >
< div class = "line" > < a id = "l00014" name = "l00014" > < / a > < span class = "lineno" > 14< / span > < span class = "comment" > *< / span > < / div >
< div class = "line" > < a id = "l00015" name = "l00015" > < / a > < span class = "lineno" > 15< / span > < span class = "comment" > * You should have received a copy of the GNU Lesser General Public< / span > < / div >
< div class = "line" > < a id = "l00016" name = "l00016" > < / a > < span class = "lineno" > 16< / span > < span class = "comment" > * License along with this library; if not, see < http://www.gnu.org/licenses/> .< / span > < / div >
< div class = "line" > < a id = "l00017" name = "l00017" > < / a > < span class = "lineno" > 17< / span > < span class = "comment" > */< / span > < / div >
< div class = "line" > < a id = "l00018" name = "l00018" > < / a > < span class = "lineno" > 18< / span > < / div >
< div class = "line" > < a id = "l00027" name = "l00027" > < / a > < span class = "lineno" > 27< / span > < / div >
< div class = "line" > < a id = "l00028" name = "l00028" > < / a > < span class = "lineno" > 28< / span > < span class = "preprocessor" > #include < stddef.h> < / span > < / div >
< div class = "line" > < a id = "l00029" name = "l00029" > < / a > < span class = "lineno" > 29< / span > < span class = "preprocessor" > #include < stdint.h> < / span > < / div >
< div class = "line" > < a id = "l00030" name = "l00030" > < / a > < span class = "lineno" > 30< / span > < span class = "preprocessor" > #include < string.h> < / span > < / div >
< div class = "line" > < a id = "l00031" name = "l00031" > < / a > < span class = "lineno" > 31< / span > < / div >
< div class = "line" > < a id = "l00032" name = "l00032" > < / a > < span class = "lineno" > 32< / span > < span class = "preprocessor" > #include " < a class = "code" href = "gf256_8h.html" > gf256.h< / a > " < / span > < / div >
< div class = "line" > < a id = "l00033" name = "l00033" > < / a > < span class = "lineno" > 33< / span > < span class = "preprocessor" > #include " < a class = "code" href = "simd_8h.html" > aaruformat/simd.h< / a > " < / span > < / div >
< div class = "line" > < a id = "l00034" name = "l00034" > < / a > < span class = "lineno" > 34< / span > < / div >
< div class = "line" > < a id = "l00035" name = "l00035" > < / a > < span class = "lineno" > 35< / span > < span class = "comment" > /* -------------------------------------------------------------------------< / span > < / div >
< div class = "line" > < a id = "l00036" name = "l00036" > < / a > < span class = "lineno" > 36< / span > < span class = "comment" > * Log / anti-log tables for GF(2^8) with polynomial 0x11D< / span > < / div >
< div class = "line" > < a id = "l00037" name = "l00037" > < / a > < span class = "lineno" > 37< / span > < span class = "comment" > * Generator element: 2< / span > < / div >
< div class = "line" > < a id = "l00038" name = "l00038" > < / a > < span class = "lineno" > 38< / span > < span class = "comment" > * ------------------------------------------------------------------------- */< / span > < / div >
< div class = "line" > < a id = "l00039" name = "l00039" > < / a > < span class = "lineno" > 39< / span > < / div >
< div class = "line" > < a id = "l00041" name = "l00041" > < / a > < span class = "lineno" > < a class = "line" href = "gf256_8c.html#a49a3de03e67667af04f5c8014fdbe293" > 41< / a > < / span > < span class = "keyword" > static< / span > uint8_t < a class = "code hl_variable" href = "gf256_8c.html#a49a3de03e67667af04f5c8014fdbe293" > gf256_log_table< / a > [256];< / div >
< div class = "line" > < a id = "l00043" name = "l00043" > < / a > < span class = "lineno" > < a class = "line" href = "gf256_8c.html#ad692be2f1e47066d0a53e97a3a38eb21" > 43< / a > < / span > < span class = "keyword" > static< / span > uint8_t < a class = "code hl_variable" href = "gf256_8c.html#ad692be2f1e47066d0a53e97a3a38eb21" > gf256_exp_table< / a > [512];< / div >
< div class = "line" > < a id = "l00044" name = "l00044" > < / a > < span class = "lineno" > 44< / span > < / div >
< div class = "line" > < a id = "l00046" name = "l00046" > < / a > < span class = "lineno" > < a class = "line" href = "gf256_8c.html#aa3d36bc7f91e5c5fe01b56acd8ebbbd9" > 46< / a > < / span > < span class = "keyword" > static< / span > < span class = "keywordtype" > int< / span > < a class = "code hl_variable" href = "gf256_8c.html#aa3d36bc7f91e5c5fe01b56acd8ebbbd9" > gf256_tables_initialized< / a > = 0;< / div >
< div class = "line" > < a id = "l00047" name = "l00047" > < / a > < span class = "lineno" > 47< / span > < / div >
< div class = "foldopen" id = "foldopen00051" data-start = "{" data-end = "}" >
< div class = "line" > < a id = "l00051" name = "l00051" > < / a > < span class = "lineno" > < a class = "line" href = "gf256_8c.html#ab20c63e8967dbedeb2a0fb212e5aa8f8" > 51< / a > < / span > < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "gf256_8c.html#ab20c63e8967dbedeb2a0fb212e5aa8f8" > gf256_init_tables< / a > (< span class = "keywordtype" > void< / span > )< / div >
< div class = "line" > < a id = "l00052" name = "l00052" > < / a > < span class = "lineno" > 52< / span > {< / div >
< div class = "line" > < a id = "l00053" name = "l00053" > < / a > < span class = "lineno" > 53< / span > < span class = "keywordflow" > if< / span > (< a class = "code hl_variable" href = "gf256_8c.html#aa3d36bc7f91e5c5fe01b56acd8ebbbd9" > gf256_tables_initialized< / a > ) < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a id = "l00054" name = "l00054" > < / a > < span class = "lineno" > 54< / span > < / div >
< div class = "line" > < a id = "l00055" name = "l00055" > < / a > < span class = "lineno" > 55< / span > < span class = "keywordtype" > unsigned< / span > x = 1;< / div >
< div class = "line" > < a id = "l00056" name = "l00056" > < / a > < span class = "lineno" > 56< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < 255; i++)< / div >
< div class = "line" > < a id = "l00057" name = "l00057" > < / a > < span class = "lineno" > 57< / span > {< / div >
< div class = "line" > < a id = "l00058" name = "l00058" > < / a > < span class = "lineno" > 58< / span > < a class = "code hl_variable" href = "gf256_8c.html#ad692be2f1e47066d0a53e97a3a38eb21" > gf256_exp_table< / a > [i] = (uint8_t)x;< / div >
< div class = "line" > < a id = "l00059" name = "l00059" > < / a > < span class = "lineno" > 59< / span > < a class = "code hl_variable" href = "gf256_8c.html#ad692be2f1e47066d0a53e97a3a38eb21" > gf256_exp_table< / a > [i+255] = (uint8_t)x; < span class = "comment" > /* wrap-around for easy mod 255 */< / span > < / div >
< div class = "line" > < a id = "l00060" name = "l00060" > < / a > < span class = "lineno" > 60< / span > < a class = "code hl_variable" href = "gf256_8c.html#a49a3de03e67667af04f5c8014fdbe293" > gf256_log_table< / a > [x] = (uint8_t)i;< / div >
< div class = "line" > < a id = "l00061" name = "l00061" > < / a > < span class = "lineno" > 61< / span > < / div >
< div class = "line" > < a id = "l00062" name = "l00062" > < / a > < span class = "lineno" > 62< / span > < span class = "comment" > /* Multiply by generator 2 in GF(2^8) */< / span > < / div >
< div class = "line" > < a id = "l00063" name = "l00063" > < / a > < span class = "lineno" > 63< / span > x < < = 1;< / div >
< div class = "line" > < a id = "l00064" name = "l00064" > < / a > < span class = "lineno" > 64< / span > < span class = "keywordflow" > if< / span > (x & 0x100) x ^= 0x11D;< / div >
< div class = "line" > < a id = "l00065" name = "l00065" > < / a > < span class = "lineno" > 65< / span > }< / div >
< div class = "line" > < a id = "l00066" name = "l00066" > < / a > < span class = "lineno" > 66< / span > < a class = "code hl_variable" href = "gf256_8c.html#a49a3de03e67667af04f5c8014fdbe293" > gf256_log_table< / a > [0] = 0; < span class = "comment" > /* Convention: log(0) = 0, unused in mul since we short-circuit */< / span > < / div >
< div class = "line" > < a id = "l00067" name = "l00067" > < / a > < span class = "lineno" > 67< / span > < a class = "code hl_variable" href = "gf256_8c.html#ad692be2f1e47066d0a53e97a3a38eb21" > gf256_exp_table< / a > [510] = < a class = "code hl_variable" href = "gf256_8c.html#ad692be2f1e47066d0a53e97a3a38eb21" > gf256_exp_table< / a > [0]; < span class = "comment" > /* Complete wrap */< / span > < / div >
< div class = "line" > < a id = "l00068" name = "l00068" > < / a > < span class = "lineno" > 68< / span > < a class = "code hl_variable" href = "gf256_8c.html#ad692be2f1e47066d0a53e97a3a38eb21" > gf256_exp_table< / a > [511] = < a class = "code hl_variable" href = "gf256_8c.html#ad692be2f1e47066d0a53e97a3a38eb21" > gf256_exp_table< / a > [1];< / div >
< div class = "line" > < a id = "l00069" name = "l00069" > < / a > < span class = "lineno" > 69< / span > < / div >
< div class = "line" > < a id = "l00070" name = "l00070" > < / a > < span class = "lineno" > 70< / span > < a class = "code hl_variable" href = "gf256_8c.html#aa3d36bc7f91e5c5fe01b56acd8ebbbd9" > gf256_tables_initialized< / a > = 1;< / div >
< div class = "line" > < a id = "l00071" name = "l00071" > < / a > < span class = "lineno" > 71< / span > }< / div >
< / div >
< div class = "line" > < a id = "l00072" name = "l00072" > < / a > < span class = "lineno" > 72< / span > < / div >
< div class = "line" > < a id = "l00073" name = "l00073" > < / a > < span class = "lineno" > 73< / span > < span class = "comment" > /* -------------------------------------------------------------------------< / span > < / div >
< div class = "line" > < a id = "l00074" name = "l00074" > < / a > < span class = "lineno" > 74< / span > < span class = "comment" > * Scalar operations< / span > < / div >
< div class = "line" > < a id = "l00075" name = "l00075" > < / a > < span class = "lineno" > 75< / span > < span class = "comment" > * ------------------------------------------------------------------------- */< / span > < / div >
< div class = "line" > < a id = "l00076" name = "l00076" > < / a > < span class = "lineno" > 76< / span > < / div >
< div class = "foldopen" id = "foldopen00077" data-start = "{" data-end = "}" >
< div class = "line" > < a id = "l00077" name = "l00077" > < / a > < span class = "lineno" > < a class = "line" href = "gf256_8c.html#af1afff8141cfc915bb37fc01dab39995" > 77< / a > < / span > uint8_t < a class = "code hl_function" href = "gf256_8c.html#af1afff8141cfc915bb37fc01dab39995" > gf256_mul< / a > (uint8_t a, uint8_t b)< / div >
< div class = "line" > < a id = "l00078" name = "l00078" > < / a > < span class = "lineno" > 78< / span > {< / div >
< div class = "line" > < a id = "l00079" name = "l00079" > < / a > < span class = "lineno" > 79< / span > < span class = "keywordflow" > if< / span > (a == 0 || b == 0) < span class = "keywordflow" > return< / span > 0;< / div >
< div class = "line" > < a id = "l00080" name = "l00080" > < / a > < span class = "lineno" > 80< / span > < a class = "code hl_function" href = "gf256_8c.html#ab20c63e8967dbedeb2a0fb212e5aa8f8" > gf256_init_tables< / a > ();< / div >
< div class = "line" > < a id = "l00081" name = "l00081" > < / a > < span class = "lineno" > 81< / span > < span class = "keywordflow" > return< / span > < a class = "code hl_variable" href = "gf256_8c.html#ad692be2f1e47066d0a53e97a3a38eb21" > gf256_exp_table< / a > [< a class = "code hl_variable" href = "gf256_8c.html#a49a3de03e67667af04f5c8014fdbe293" > gf256_log_table< / a > [a] + < a class = "code hl_variable" href = "gf256_8c.html#a49a3de03e67667af04f5c8014fdbe293" > gf256_log_table< / a > [b]];< / div >
< div class = "line" > < a id = "l00082" name = "l00082" > < / a > < span class = "lineno" > 82< / span > }< / div >
< / div >
< div class = "line" > < a id = "l00083" name = "l00083" > < / a > < span class = "lineno" > 83< / span > < / div >
< div class = "foldopen" id = "foldopen00084" data-start = "{" data-end = "}" >
< div class = "line" > < a id = "l00084" name = "l00084" > < / a > < span class = "lineno" > < a class = "line" href = "gf256_8c.html#a1f0071a2ea261bdd2a59cc757a3ce13c" > 84< / a > < / span > uint8_t < a class = "code hl_function" href = "gf256_8c.html#a1f0071a2ea261bdd2a59cc757a3ce13c" > gf256_div< / a > (uint8_t a, uint8_t b)< / div >
< div class = "line" > < a id = "l00085" name = "l00085" > < / a > < span class = "lineno" > 85< / span > {< / div >
< div class = "line" > < a id = "l00086" name = "l00086" > < / a > < span class = "lineno" > 86< / span > < span class = "keywordflow" > if< / span > (a == 0) < span class = "keywordflow" > return< / span > 0;< / div >
< div class = "line" > < a id = "l00087" name = "l00087" > < / a > < span class = "lineno" > 87< / span > < span class = "comment" > /* b must be non-zero */< / span > < / div >
< div class = "line" > < a id = "l00088" name = "l00088" > < / a > < span class = "lineno" > 88< / span > < a class = "code hl_function" href = "gf256_8c.html#ab20c63e8967dbedeb2a0fb212e5aa8f8" > gf256_init_tables< / a > ();< / div >
< div class = "line" > < a id = "l00089" name = "l00089" > < / a > < span class = "lineno" > 89< / span > < span class = "keywordflow" > return< / span > < a class = "code hl_variable" href = "gf256_8c.html#ad692be2f1e47066d0a53e97a3a38eb21" > gf256_exp_table< / a > [< a class = "code hl_variable" href = "gf256_8c.html#a49a3de03e67667af04f5c8014fdbe293" > gf256_log_table< / a > [a] + 255 - < a class = "code hl_variable" href = "gf256_8c.html#a49a3de03e67667af04f5c8014fdbe293" > gf256_log_table< / a > [b]];< / div >
< div class = "line" > < a id = "l00090" name = "l00090" > < / a > < span class = "lineno" > 90< / span > }< / div >
< / div >
< div class = "line" > < a id = "l00091" name = "l00091" > < / a > < span class = "lineno" > 91< / span > < / div >
< div class = "foldopen" id = "foldopen00092" data-start = "{" data-end = "}" >
< div class = "line" > < a id = "l00092" name = "l00092" > < / a > < span class = "lineno" > < a class = "line" href = "gf256_8c.html#a43b3c7a9e2c10d25670fd961ae2916ca" > 92< / a > < / span > uint8_t < a class = "code hl_function" href = "gf256_8c.html#a43b3c7a9e2c10d25670fd961ae2916ca" > gf256_inv< / a > (uint8_t a)< / div >
< div class = "line" > < a id = "l00093" name = "l00093" > < / a > < span class = "lineno" > 93< / span > {< / div >
< div class = "line" > < a id = "l00094" name = "l00094" > < / a > < span class = "lineno" > 94< / span > < span class = "comment" > /* a must be non-zero */< / span > < / div >
< div class = "line" > < a id = "l00095" name = "l00095" > < / a > < span class = "lineno" > 95< / span > < a class = "code hl_function" href = "gf256_8c.html#ab20c63e8967dbedeb2a0fb212e5aa8f8" > gf256_init_tables< / a > ();< / div >
< div class = "line" > < a id = "l00096" name = "l00096" > < / a > < span class = "lineno" > 96< / span > < span class = "keywordflow" > return< / span > < a class = "code hl_variable" href = "gf256_8c.html#ad692be2f1e47066d0a53e97a3a38eb21" > gf256_exp_table< / a > [255 - < a class = "code hl_variable" href = "gf256_8c.html#a49a3de03e67667af04f5c8014fdbe293" > gf256_log_table< / a > [a]];< / div >
< div class = "line" > < a id = "l00097" name = "l00097" > < / a > < span class = "lineno" > 97< / span > }< / div >
< / div >
< div class = "line" > < a id = "l00098" name = "l00098" > < / a > < span class = "lineno" > 98< / span > < / div >
< div class = "line" > < a id = "l00099" name = "l00099" > < / a > < span class = "lineno" > 99< / span > < span class = "comment" > /* -------------------------------------------------------------------------< / span > < / div >
< div class = "line" > < a id = "l00100" name = "l00100" > < / a > < span class = "lineno" > 100< / span > < span class = "comment" > * SIMD region multiply-accumulate: dst[i] ^= GF_mul(src[i], coeff)< / span > < / div >
< div class = "line" > < a id = "l00101" name = "l00101" > < / a > < span class = "lineno" > 101< / span > < span class = "comment" > *< / span > < / div >
< div class = "line" > < a id = "l00102" name = "l00102" > < / a > < span class = "lineno" > 102< / span > < span class = "comment" > * Technique: 4-bit nibble decomposition.< / span > < / div >
< div class = "line" > < a id = "l00103" name = "l00103" > < / a > < span class = "lineno" > 103< / span > < span class = "comment" > * For a given coeff, precompute:< / span > < / div >
< div class = "line" > < a id = "l00104" name = "l00104" > < / a > < span class = "lineno" > 104< / span > < span class = "comment" > * low_tbl[i] = GF_mul(i, coeff) for i = 0..15< / span > < / div >
< div class = "line" > < a id = "l00105" name = "l00105" > < / a > < span class = "lineno" > 105< / span > < span class = "comment" > * hi_tbl[i] = GF_mul(i< < 4, coeff) for i = 0..15< / span > < / div >
< div class = "line" > < a id = "l00106" name = "l00106" > < / a > < span class = "lineno" > 106< / span > < span class = "comment" > * Then for each byte b:< / span > < / div >
< div class = "line" > < a id = "l00107" name = "l00107" > < / a > < span class = "lineno" > 107< / span > < span class = "comment" > * GF_mul(b, coeff) = low_tbl[b & 0x0F] ^ hi_tbl[b > > 4]< / span > < / div >
< div class = "line" > < a id = "l00108" name = "l00108" > < / a > < span class = "lineno" > 108< / span > < span class = "comment" > * This maps to SIMD shuffle (pshufb / vpshufb / vqtbl1q_u8).< / span > < / div >
< div class = "line" > < a id = "l00109" name = "l00109" > < / a > < span class = "lineno" > 109< / span > < span class = "comment" > * ------------------------------------------------------------------------- */< / span > < / div >
< div class = "line" > < a id = "l00110" name = "l00110" > < / a > < span class = "lineno" > 110< / span > < / div >
< div class = "foldopen" id = "foldopen00114" data-start = "{" data-end = "}" >
< div class = "line" > < a id = "l00114" name = "l00114" > < / a > < span class = "lineno" > < a class = "line" href = "gf256_8c.html#adbf1ecc4540ea968b5503c40e9a95c61" > 114< / a > < / span > < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "gf256_8c.html#adbf1ecc4540ea968b5503c40e9a95c61" > gf256_build_mul_tables< / a > (uint8_t coeff, uint8_t low_tbl[16], uint8_t hi_tbl[16])< / div >
< div class = "line" > < a id = "l00115" name = "l00115" > < / a > < span class = "lineno" > 115< / span > {< / div >
< div class = "line" > < a id = "l00116" name = "l00116" > < / a > < span class = "lineno" > 116< / span > < a class = "code hl_function" href = "gf256_8c.html#ab20c63e8967dbedeb2a0fb212e5aa8f8" > gf256_init_tables< / a > ();< / div >
< div class = "line" > < a id = "l00117" name = "l00117" > < / a > < span class = "lineno" > 117< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > int< / span > i = 0; i < 16; i++)< / div >
< div class = "line" > < a id = "l00118" name = "l00118" > < / a > < span class = "lineno" > 118< / span > {< / div >
< div class = "line" > < a id = "l00119" name = "l00119" > < / a > < span class = "lineno" > 119< / span > low_tbl[i] = < a class = "code hl_function" href = "gf256_8c.html#af1afff8141cfc915bb37fc01dab39995" > gf256_mul< / a > ((uint8_t)i, coeff);< / div >
< div class = "line" > < a id = "l00120" name = "l00120" > < / a > < span class = "lineno" > 120< / span > hi_tbl[i] = < a class = "code hl_function" href = "gf256_8c.html#af1afff8141cfc915bb37fc01dab39995" > gf256_mul< / a > ((uint8_t)(i < < 4), coeff);< / div >
< div class = "line" > < a id = "l00121" name = "l00121" > < / a > < span class = "lineno" > 121< / span > }< / div >
< div class = "line" > < a id = "l00122" name = "l00122" > < / a > < span class = "lineno" > 122< / span > }< / div >
< / div >
< div class = "line" > < a id = "l00123" name = "l00123" > < / a > < span class = "lineno" > 123< / span > < / div >
< div class = "line" > < a id = "l00124" name = "l00124" > < / a > < span class = "lineno" > 124< / span > < span class = "comment" > /* ---------- Scalar fallback ---------- */< / span > < / div >
< div class = "line" > < a id = "l00125" name = "l00125" > < / a > < span class = "lineno" > 125< / span > < / div >
< div class = "foldopen" id = "foldopen00126" data-start = "{" data-end = "}" >
< div class = "line" > < a id = "l00126" name = "l00126" > < / a > < span class = "lineno" > < a class = "line" href = "gf256_8c.html#ab25d615b33a0d7af9b9313494ac30f91" > 126< / a > < / span > < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "gf256_8c.html#ab25d615b33a0d7af9b9313494ac30f91" > gf256_mul_region_scalar< / a > (uint8_t *dst, < span class = "keyword" > const< / span > uint8_t *src, uint8_t coeff, < span class = "keywordtype" > size_t< / span > len)< / div >
< div class = "line" > < a id = "l00127" name = "l00127" > < / a > < span class = "lineno" > 127< / span > {< / div >
< div class = "line" > < a id = "l00128" name = "l00128" > < / a > < span class = "lineno" > 128< / span > uint8_t low_tbl[16], hi_tbl[16];< / div >
< div class = "line" > < a id = "l00129" name = "l00129" > < / a > < span class = "lineno" > 129< / span > < a class = "code hl_function" href = "gf256_8c.html#adbf1ecc4540ea968b5503c40e9a95c61" > gf256_build_mul_tables< / a > (coeff, low_tbl, hi_tbl);< / div >
< div class = "line" > < a id = "l00130" name = "l00130" > < / a > < span class = "lineno" > 130< / span > < / div >
< div class = "line" > < a id = "l00131" name = "l00131" > < / a > < span class = "lineno" > 131< / span > < span class = "keywordflow" > for< / span > (< span class = "keywordtype" > size_t< / span > i = 0; i < len; i++)< / div >
< div class = "line" > < a id = "l00132" name = "l00132" > < / a > < span class = "lineno" > 132< / span > dst[i] ^= low_tbl[src[i] & 0x0F] ^ hi_tbl[src[i] > > 4];< / div >
< div class = "line" > < a id = "l00133" name = "l00133" > < / a > < span class = "lineno" > 133< / span > }< / div >
< / div >
< div class = "line" > < a id = "l00134" name = "l00134" > < / a > < span class = "lineno" > 134< / span > < / div >
< div class = "foldopen" id = "foldopen00135" data-start = "{" data-end = "}" >
< div class = "line" > < a id = "l00135" name = "l00135" > < / a > < span class = "lineno" > < a class = "line" href = "gf256_8c.html#ad1a9a733d8545bb5b217b49aea7aa43a" > 135< / a > < / span > < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "gf256_8c.html#ad1a9a733d8545bb5b217b49aea7aa43a" > gf256_xor_region_scalar< / a > (uint8_t *dst, < span class = "keyword" > const< / span > uint8_t *src, < span class = "keywordtype" > size_t< / span > len)< / div >
< div class = "line" > < a id = "l00136" name = "l00136" > < / a > < span class = "lineno" > 136< / span > {< / div >
< div class = "line" > < a id = "l00137" name = "l00137" > < / a > < span class = "lineno" > 137< / span > < span class = "keywordtype" > size_t< / span > i = 0;< / div >
< div class = "line" > < a id = "l00138" name = "l00138" > < / a > < span class = "lineno" > 138< / span > < / div >
< div class = "line" > < a id = "l00139" name = "l00139" > < / a > < span class = "lineno" > 139< / span > < span class = "comment" > /* Process 8 bytes at a time */< / span > < / div >
< div class = "line" > < a id = "l00140" name = "l00140" > < / a > < span class = "lineno" > 140< / span > < span class = "keywordflow" > for< / span > (; i + 8 < = len; i += 8)< / div >
< div class = "line" > < a id = "l00141" name = "l00141" > < / a > < span class = "lineno" > 141< / span > {< / div >
< div class = "line" > < a id = "l00142" name = "l00142" > < / a > < span class = "lineno" > 142< / span > uint64_t d, s;< / div >
< div class = "line" > < a id = "l00143" name = "l00143" > < / a > < span class = "lineno" > 143< / span > memcpy(& d, dst + i, 8);< / div >
< div class = "line" > < a id = "l00144" name = "l00144" > < / a > < span class = "lineno" > 144< / span > memcpy(& s, src + i, 8);< / div >
< div class = "line" > < a id = "l00145" name = "l00145" > < / a > < span class = "lineno" > 145< / span > d ^= s;< / div >
< div class = "line" > < a id = "l00146" name = "l00146" > < / a > < span class = "lineno" > 146< / span > memcpy(dst + i, & d, 8);< / div >
< div class = "line" > < a id = "l00147" name = "l00147" > < / a > < span class = "lineno" > 147< / span > }< / div >
< div class = "line" > < a id = "l00148" name = "l00148" > < / a > < span class = "lineno" > 148< / span > < / div >
< div class = "line" > < a id = "l00149" name = "l00149" > < / a > < span class = "lineno" > 149< / span > < span class = "keywordflow" > for< / span > (; i < len; i++)< / div >
< div class = "line" > < a id = "l00150" name = "l00150" > < / a > < span class = "lineno" > 150< / span > dst[i] ^= src[i];< / div >
< div class = "line" > < a id = "l00151" name = "l00151" > < / a > < span class = "lineno" > 151< / span > }< / div >
< / div >
< div class = "line" > < a id = "l00152" name = "l00152" > < / a > < span class = "lineno" > 152< / span > < / div >
< div class = "line" > < a id = "l00153" name = "l00153" > < / a > < span class = "lineno" > 153< / span > < span class = "comment" > /* ---------- x86 SSSE3 ---------- */< / span > < / div >
< div class = "line" > < a id = "l00154" name = "l00154" > < / a > < span class = "lineno" > 154< / span > < / div >
< div class = "line" > < a id = "l00155" name = "l00155" > < / a > < span class = "lineno" > 155< / span > < span class = "preprocessor" > #if defined(__x86_64__) || defined(__amd64) || defined(_M_AMD64) || defined(_M_X64) || \< / span > < / div >
< div class = "line" > < a id = "l00156" name = "l00156" > < / a > < span class = "lineno" > 156< / span > < span class = "preprocessor" > defined(__I386__) || defined(__i386__) || defined(__THW_INTEL) || defined(_M_IX86)< / span > < / div >
< div class = "line" > < a id = "l00157" name = "l00157" > < / a > < span class = "lineno" > 157< / span > < / div >
< div class = "line" > < a id = "l00158" name = "l00158" > < / a > < span class = "lineno" > 158< / span > < span class = "preprocessor" > #include < tmmintrin.h> < / span > < span class = "comment" > /* SSSE3: _mm_shuffle_epi8 */< / span > < / div >
< div class = "line" > < a id = "l00159" name = "l00159" > < / a > < span class = "lineno" > 159< / span > < / div >
< div class = "line" > < a id = "l00160" name = "l00160" > < / a > < span class = "lineno" > 160< / span > SSSE3 < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > gf256_mul_region_ssse3(uint8_t *dst, < span class = "keyword" > const< / span > uint8_t *src, uint8_t coeff, < span class = "keywordtype" > size_t< / span > len)< / div >
< div class = "line" > < a id = "l00161" name = "l00161" > < / a > < span class = "lineno" > 161< / span > {< / div >
< div class = "line" > < a id = "l00162" name = "l00162" > < / a > < span class = "lineno" > 162< / span > uint8_t low_tbl[16], hi_tbl[16];< / div >
< div class = "line" > < a id = "l00163" name = "l00163" > < / a > < span class = "lineno" > 163< / span > < a class = "code hl_function" href = "gf256_8c.html#adbf1ecc4540ea968b5503c40e9a95c61" > gf256_build_mul_tables< / a > (coeff, low_tbl, hi_tbl);< / div >
< div class = "line" > < a id = "l00164" name = "l00164" > < / a > < span class = "lineno" > 164< / span > < / div >
< div class = "line" > < a id = "l00165" name = "l00165" > < / a > < span class = "lineno" > 165< / span > < span class = "keyword" > const< / span > __m128i low_v = _mm_loadu_si128((< span class = "keyword" > const< / span > __m128i *)low_tbl);< / div >
< div class = "line" > < a id = "l00166" name = "l00166" > < / a > < span class = "lineno" > 166< / span > < span class = "keyword" > const< / span > __m128i hi_v = _mm_loadu_si128((< span class = "keyword" > const< / span > __m128i *)hi_tbl);< / div >
< div class = "line" > < a id = "l00167" name = "l00167" > < / a > < span class = "lineno" > 167< / span > < span class = "keyword" > const< / span > __m128i mask = _mm_set1_epi8(0x0F);< / div >
< div class = "line" > < a id = "l00168" name = "l00168" > < / a > < span class = "lineno" > 168< / span > < / div >
< div class = "line" > < a id = "l00169" name = "l00169" > < / a > < span class = "lineno" > 169< / span > < span class = "keywordtype" > size_t< / span > i = 0;< / div >
< div class = "line" > < a id = "l00170" name = "l00170" > < / a > < span class = "lineno" > 170< / span > < span class = "keywordflow" > for< / span > (; i + 16 < = len; i += 16)< / div >
< div class = "line" > < a id = "l00171" name = "l00171" > < / a > < span class = "lineno" > 171< / span > {< / div >
< div class = "line" > < a id = "l00172" name = "l00172" > < / a > < span class = "lineno" > 172< / span > __m128i s = _mm_loadu_si128((< span class = "keyword" > const< / span > __m128i *)(src + i));< / div >
< div class = "line" > < a id = "l00173" name = "l00173" > < / a > < span class = "lineno" > 173< / span > __m128i d = _mm_loadu_si128((< span class = "keyword" > const< / span > __m128i *)(dst + i));< / div >
< div class = "line" > < a id = "l00174" name = "l00174" > < / a > < span class = "lineno" > 174< / span > __m128i s_lo = _mm_and_si128(s, mask);< / div >
< div class = "line" > < a id = "l00175" name = "l00175" > < / a > < span class = "lineno" > 175< / span > __m128i s_hi = _mm_and_si128(_mm_srli_epi16(s, 4), mask);< / div >
< div class = "line" > < a id = "l00176" name = "l00176" > < / a > < span class = "lineno" > 176< / span > __m128i lo = _mm_shuffle_epi8(low_v, s_lo);< / div >
< div class = "line" > < a id = "l00177" name = "l00177" > < / a > < span class = "lineno" > 177< / span > __m128i hi = _mm_shuffle_epi8(hi_v, s_hi);< / div >
< div class = "line" > < a id = "l00178" name = "l00178" > < / a > < span class = "lineno" > 178< / span > __m128i r = _mm_xor_si128(_mm_xor_si128(lo, hi), d);< / div >
< div class = "line" > < a id = "l00179" name = "l00179" > < / a > < span class = "lineno" > 179< / span > _mm_storeu_si128((__m128i *)(dst + i), r);< / div >
< div class = "line" > < a id = "l00180" name = "l00180" > < / a > < span class = "lineno" > 180< / span > }< / div >
< div class = "line" > < a id = "l00181" name = "l00181" > < / a > < span class = "lineno" > 181< / span > < / div >
< div class = "line" > < a id = "l00182" name = "l00182" > < / a > < span class = "lineno" > 182< / span > < span class = "comment" > /* Tail */< / span > < / div >
< div class = "line" > < a id = "l00183" name = "l00183" > < / a > < span class = "lineno" > 183< / span > < span class = "keywordflow" > for< / span > (; i < len; i++)< / div >
< div class = "line" > < a id = "l00184" name = "l00184" > < / a > < span class = "lineno" > 184< / span > dst[i] ^= low_tbl[src[i] & 0x0F] ^ hi_tbl[src[i] > > 4];< / div >
< div class = "line" > < a id = "l00185" name = "l00185" > < / a > < span class = "lineno" > 185< / span > }< / div >
< div class = "line" > < a id = "l00186" name = "l00186" > < / a > < span class = "lineno" > 186< / span > < / div >
< div class = "line" > < a id = "l00187" name = "l00187" > < / a > < span class = "lineno" > 187< / span > SSSE3 < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > gf256_xor_region_ssse3(uint8_t *dst, < span class = "keyword" > const< / span > uint8_t *src, < span class = "keywordtype" > size_t< / span > len)< / div >
< div class = "line" > < a id = "l00188" name = "l00188" > < / a > < span class = "lineno" > 188< / span > {< / div >
< div class = "line" > < a id = "l00189" name = "l00189" > < / a > < span class = "lineno" > 189< / span > < span class = "keywordtype" > size_t< / span > i = 0;< / div >
< div class = "line" > < a id = "l00190" name = "l00190" > < / a > < span class = "lineno" > 190< / span > < span class = "keywordflow" > for< / span > (; i + 16 < = len; i += 16)< / div >
< div class = "line" > < a id = "l00191" name = "l00191" > < / a > < span class = "lineno" > 191< / span > {< / div >
< div class = "line" > < a id = "l00192" name = "l00192" > < / a > < span class = "lineno" > 192< / span > __m128i d = _mm_loadu_si128((< span class = "keyword" > const< / span > __m128i *)(dst + i));< / div >
< div class = "line" > < a id = "l00193" name = "l00193" > < / a > < span class = "lineno" > 193< / span > __m128i s = _mm_loadu_si128((< span class = "keyword" > const< / span > __m128i *)(src + i));< / div >
< div class = "line" > < a id = "l00194" name = "l00194" > < / a > < span class = "lineno" > 194< / span > _mm_storeu_si128((__m128i *)(dst + i), _mm_xor_si128(d, s));< / div >
< div class = "line" > < a id = "l00195" name = "l00195" > < / a > < span class = "lineno" > 195< / span > }< / div >
< div class = "line" > < a id = "l00196" name = "l00196" > < / a > < span class = "lineno" > 196< / span > < span class = "keywordflow" > for< / span > (; i < len; i++) dst[i] ^= src[i];< / div >
< div class = "line" > < a id = "l00197" name = "l00197" > < / a > < span class = "lineno" > 197< / span > }< / div >
< div class = "line" > < a id = "l00198" name = "l00198" > < / a > < span class = "lineno" > 198< / span > < / div >
< div class = "line" > < a id = "l00199" name = "l00199" > < / a > < span class = "lineno" > 199< / span > < span class = "comment" > /* ---------- x86 AVX2 ---------- */< / span > < / div >
< div class = "line" > < a id = "l00200" name = "l00200" > < / a > < span class = "lineno" > 200< / span > < / div >
< div class = "line" > < a id = "l00201" name = "l00201" > < / a > < span class = "lineno" > 201< / span > < span class = "preprocessor" > #include < immintrin.h> < / span > < span class = "comment" > /* AVX2: _mm256_shuffle_epi8 */< / span > < / div >
< div class = "line" > < a id = "l00202" name = "l00202" > < / a > < span class = "lineno" > 202< / span > < / div >
< div class = "line" > < a id = "l00203" name = "l00203" > < / a > < span class = "lineno" > 203< / span > AVX2 < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > gf256_mul_region_avx2(uint8_t *dst, < span class = "keyword" > const< / span > uint8_t *src, uint8_t coeff, < span class = "keywordtype" > size_t< / span > len)< / div >
< div class = "line" > < a id = "l00204" name = "l00204" > < / a > < span class = "lineno" > 204< / span > {< / div >
< div class = "line" > < a id = "l00205" name = "l00205" > < / a > < span class = "lineno" > 205< / span > uint8_t low_tbl[16], hi_tbl[16];< / div >
< div class = "line" > < a id = "l00206" name = "l00206" > < / a > < span class = "lineno" > 206< / span > < a class = "code hl_function" href = "gf256_8c.html#adbf1ecc4540ea968b5503c40e9a95c61" > gf256_build_mul_tables< / a > (coeff, low_tbl, hi_tbl);< / div >
< div class = "line" > < a id = "l00207" name = "l00207" > < / a > < span class = "lineno" > 207< / span > < / div >
< div class = "line" > < a id = "l00208" name = "l00208" > < / a > < span class = "lineno" > 208< / span > < span class = "comment" > /* Broadcast 16-byte tables to both 128-bit lanes of 256-bit register */< / span > < / div >
< div class = "line" > < a id = "l00209" name = "l00209" > < / a > < span class = "lineno" > 209< / span > < span class = "keyword" > const< / span > __m128i low_128 = _mm_loadu_si128((< span class = "keyword" > const< / span > __m128i *)low_tbl);< / div >
< div class = "line" > < a id = "l00210" name = "l00210" > < / a > < span class = "lineno" > 210< / span > < span class = "keyword" > const< / span > __m128i hi_128 = _mm_loadu_si128((< span class = "keyword" > const< / span > __m128i *)hi_tbl);< / div >
< div class = "line" > < a id = "l00211" name = "l00211" > < / a > < span class = "lineno" > 211< / span > < span class = "keyword" > const< / span > __m256i low_v = _mm256_broadcastsi128_si256(low_128);< / div >
< div class = "line" > < a id = "l00212" name = "l00212" > < / a > < span class = "lineno" > 212< / span > < span class = "keyword" > const< / span > __m256i hi_v = _mm256_broadcastsi128_si256(hi_128);< / div >
< div class = "line" > < a id = "l00213" name = "l00213" > < / a > < span class = "lineno" > 213< / span > < span class = "keyword" > const< / span > __m256i mask = _mm256_set1_epi8(0x0F);< / div >
< div class = "line" > < a id = "l00214" name = "l00214" > < / a > < span class = "lineno" > 214< / span > < / div >
< div class = "line" > < a id = "l00215" name = "l00215" > < / a > < span class = "lineno" > 215< / span > < span class = "keywordtype" > size_t< / span > i = 0;< / div >
< div class = "line" > < a id = "l00216" name = "l00216" > < / a > < span class = "lineno" > 216< / span > < span class = "keywordflow" > for< / span > (; i + 32 < = len; i += 32)< / div >
< div class = "line" > < a id = "l00217" name = "l00217" > < / a > < span class = "lineno" > 217< / span > {< / div >
< div class = "line" > < a id = "l00218" name = "l00218" > < / a > < span class = "lineno" > 218< / span > __m256i s = _mm256_loadu_si256((< span class = "keyword" > const< / span > __m256i *)(src + i));< / div >
< div class = "line" > < a id = "l00219" name = "l00219" > < / a > < span class = "lineno" > 219< / span > __m256i d = _mm256_loadu_si256((< span class = "keyword" > const< / span > __m256i *)(dst + i));< / div >
< div class = "line" > < a id = "l00220" name = "l00220" > < / a > < span class = "lineno" > 220< / span > __m256i s_lo = _mm256_and_si256(s, mask);< / div >
< div class = "line" > < a id = "l00221" name = "l00221" > < / a > < span class = "lineno" > 221< / span > __m256i s_hi = _mm256_and_si256(_mm256_srli_epi16(s, 4), mask);< / div >
< div class = "line" > < a id = "l00222" name = "l00222" > < / a > < span class = "lineno" > 222< / span > __m256i lo = _mm256_shuffle_epi8(low_v, s_lo);< / div >
< div class = "line" > < a id = "l00223" name = "l00223" > < / a > < span class = "lineno" > 223< / span > __m256i hi = _mm256_shuffle_epi8(hi_v, s_hi);< / div >
< div class = "line" > < a id = "l00224" name = "l00224" > < / a > < span class = "lineno" > 224< / span > __m256i r = _mm256_xor_si256(_mm256_xor_si256(lo, hi), d);< / div >
< div class = "line" > < a id = "l00225" name = "l00225" > < / a > < span class = "lineno" > 225< / span > _mm256_storeu_si256((__m256i *)(dst + i), r);< / div >
< div class = "line" > < a id = "l00226" name = "l00226" > < / a > < span class = "lineno" > 226< / span > }< / div >
< div class = "line" > < a id = "l00227" name = "l00227" > < / a > < span class = "lineno" > 227< / span > < / div >
< div class = "line" > < a id = "l00228" name = "l00228" > < / a > < span class = "lineno" > 228< / span > < span class = "comment" > /* Tail: SSSE3 for remaining 16-byte chunks, then scalar */< / span > < / div >
< div class = "line" > < a id = "l00229" name = "l00229" > < / a > < span class = "lineno" > 229< / span > < span class = "keyword" > const< / span > __m128i low_v2 = low_128;< / div >
< div class = "line" > < a id = "l00230" name = "l00230" > < / a > < span class = "lineno" > 230< / span > < span class = "keyword" > const< / span > __m128i hi_v2 = hi_128;< / div >
< div class = "line" > < a id = "l00231" name = "l00231" > < / a > < span class = "lineno" > 231< / span > < span class = "keyword" > const< / span > __m128i mask2 = _mm_set1_epi8(0x0F);< / div >
< div class = "line" > < a id = "l00232" name = "l00232" > < / a > < span class = "lineno" > 232< / span > < span class = "keywordflow" > for< / span > (; i + 16 < = len; i += 16)< / div >
< div class = "line" > < a id = "l00233" name = "l00233" > < / a > < span class = "lineno" > 233< / span > {< / div >
< div class = "line" > < a id = "l00234" name = "l00234" > < / a > < span class = "lineno" > 234< / span > __m128i s = _mm_loadu_si128((< span class = "keyword" > const< / span > __m128i *)(src + i));< / div >
< div class = "line" > < a id = "l00235" name = "l00235" > < / a > < span class = "lineno" > 235< / span > __m128i d = _mm_loadu_si128((< span class = "keyword" > const< / span > __m128i *)(dst + i));< / div >
< div class = "line" > < a id = "l00236" name = "l00236" > < / a > < span class = "lineno" > 236< / span > __m128i s_lo = _mm_and_si128(s, mask2);< / div >
< div class = "line" > < a id = "l00237" name = "l00237" > < / a > < span class = "lineno" > 237< / span > __m128i s_hi = _mm_and_si128(_mm_srli_epi16(s, 4), mask2);< / div >
< div class = "line" > < a id = "l00238" name = "l00238" > < / a > < span class = "lineno" > 238< / span > __m128i lo = _mm_shuffle_epi8(low_v2, s_lo);< / div >
< div class = "line" > < a id = "l00239" name = "l00239" > < / a > < span class = "lineno" > 239< / span > __m128i hi = _mm_shuffle_epi8(hi_v2, s_hi);< / div >
< div class = "line" > < a id = "l00240" name = "l00240" > < / a > < span class = "lineno" > 240< / span > __m128i r = _mm_xor_si128(_mm_xor_si128(lo, hi), d);< / div >
< div class = "line" > < a id = "l00241" name = "l00241" > < / a > < span class = "lineno" > 241< / span > _mm_storeu_si128((__m128i *)(dst + i), r);< / div >
< div class = "line" > < a id = "l00242" name = "l00242" > < / a > < span class = "lineno" > 242< / span > }< / div >
< div class = "line" > < a id = "l00243" name = "l00243" > < / a > < span class = "lineno" > 243< / span > < / div >
< div class = "line" > < a id = "l00244" name = "l00244" > < / a > < span class = "lineno" > 244< / span > < span class = "keywordflow" > for< / span > (; i < len; i++)< / div >
< div class = "line" > < a id = "l00245" name = "l00245" > < / a > < span class = "lineno" > 245< / span > dst[i] ^= low_tbl[src[i] & 0x0F] ^ hi_tbl[src[i] > > 4];< / div >
< div class = "line" > < a id = "l00246" name = "l00246" > < / a > < span class = "lineno" > 246< / span > }< / div >
< div class = "line" > < a id = "l00247" name = "l00247" > < / a > < span class = "lineno" > 247< / span > < / div >
< div class = "line" > < a id = "l00248" name = "l00248" > < / a > < span class = "lineno" > 248< / span > AVX2 < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > gf256_xor_region_avx2(uint8_t *dst, < span class = "keyword" > const< / span > uint8_t *src, < span class = "keywordtype" > size_t< / span > len)< / div >
< div class = "line" > < a id = "l00249" name = "l00249" > < / a > < span class = "lineno" > 249< / span > {< / div >
< div class = "line" > < a id = "l00250" name = "l00250" > < / a > < span class = "lineno" > 250< / span > < span class = "keywordtype" > size_t< / span > i = 0;< / div >
< div class = "line" > < a id = "l00251" name = "l00251" > < / a > < span class = "lineno" > 251< / span > < span class = "keywordflow" > for< / span > (; i + 32 < = len; i += 32)< / div >
< div class = "line" > < a id = "l00252" name = "l00252" > < / a > < span class = "lineno" > 252< / span > {< / div >
< div class = "line" > < a id = "l00253" name = "l00253" > < / a > < span class = "lineno" > 253< / span > __m256i d = _mm256_loadu_si256((< span class = "keyword" > const< / span > __m256i *)(dst + i));< / div >
< div class = "line" > < a id = "l00254" name = "l00254" > < / a > < span class = "lineno" > 254< / span > __m256i s = _mm256_loadu_si256((< span class = "keyword" > const< / span > __m256i *)(src + i));< / div >
< div class = "line" > < a id = "l00255" name = "l00255" > < / a > < span class = "lineno" > 255< / span > _mm256_storeu_si256((__m256i *)(dst + i), _mm256_xor_si256(d, s));< / div >
< div class = "line" > < a id = "l00256" name = "l00256" > < / a > < span class = "lineno" > 256< / span > }< / div >
< div class = "line" > < a id = "l00257" name = "l00257" > < / a > < span class = "lineno" > 257< / span > < span class = "keywordflow" > for< / span > (; i + 16 < = len; i += 16)< / div >
< div class = "line" > < a id = "l00258" name = "l00258" > < / a > < span class = "lineno" > 258< / span > {< / div >
< div class = "line" > < a id = "l00259" name = "l00259" > < / a > < span class = "lineno" > 259< / span > __m128i d = _mm_loadu_si128((< span class = "keyword" > const< / span > __m128i *)(dst + i));< / div >
< div class = "line" > < a id = "l00260" name = "l00260" > < / a > < span class = "lineno" > 260< / span > __m128i s = _mm_loadu_si128((< span class = "keyword" > const< / span > __m128i *)(src + i));< / div >
< div class = "line" > < a id = "l00261" name = "l00261" > < / a > < span class = "lineno" > 261< / span > _mm_storeu_si128((__m128i *)(dst + i), _mm_xor_si128(d, s));< / div >
< div class = "line" > < a id = "l00262" name = "l00262" > < / a > < span class = "lineno" > 262< / span > }< / div >
< div class = "line" > < a id = "l00263" name = "l00263" > < / a > < span class = "lineno" > 263< / span > < span class = "keywordflow" > for< / span > (; i < len; i++) dst[i] ^= src[i];< / div >
< div class = "line" > < a id = "l00264" name = "l00264" > < / a > < span class = "lineno" > 264< / span > }< / div >
< div class = "line" > < a id = "l00265" name = "l00265" > < / a > < span class = "lineno" > 265< / span > < / div >
< div class = "line" > < a id = "l00266" name = "l00266" > < / a > < span class = "lineno" > 266< / span > < span class = "comment" > /* Forward declarations for CPUID-based detection (from simd.c) */< / span > < / div >
< div class = "line" > < a id = "l00267" name = "l00267" > < / a > < span class = "lineno" > 267< / span > < span class = "keywordtype" > int< / span > have_ssse3(< span class = "keywordtype" > void< / span > );< / div >
< div class = "line" > < a id = "l00268" name = "l00268" > < / a > < span class = "lineno" > 268< / span > < span class = "keywordtype" > int< / span > have_avx2(< span class = "keywordtype" > void< / span > );< / div >
< div class = "line" > < a id = "l00269" name = "l00269" > < / a > < span class = "lineno" > 269< / span > < / div >
< div class = "line" > < a id = "l00270" name = "l00270" > < / a > < span class = "lineno" > 270< / span > < span class = "preprocessor" > #endif < / span > < span class = "comment" > /* x86 */< / span > < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a id = "l00271" name = "l00271" > < / a > < span class = "lineno" > 271< / span > < / div >
< div class = "line" > < a id = "l00272" name = "l00272" > < / a > < span class = "lineno" > 272< / span > < span class = "comment" > /* ---------- ARM NEON ---------- */< / span > < / div >
< div class = "line" > < a id = "l00273" name = "l00273" > < / a > < span class = "lineno" > 273< / span > < / div >
< div class = "line" > < a id = "l00274" name = "l00274" > < / a > < span class = "lineno" > 274< / span > < span class = "preprocessor" > #if defined(__aarch64__) || defined(_M_ARM64) || defined(__arm__) || defined(_M_ARM)< / span > < / div >
< div class = "line" > < a id = "l00275" name = "l00275" > < / a > < span class = "lineno" > 275< / span > < / div >
< div class = "line" > < a id = "l00276" name = "l00276" > < / a > < span class = "lineno" > 276< / span > < span class = "preprocessor" > #include < arm_neon.h> < / span > < / div >
< div class = "line" > < a id = "l00277" name = "l00277" > < / a > < span class = "lineno" > 277< / span > < / div >
< div class = "line" > < a id = "l00278" name = "l00278" > < / a > < span class = "lineno" > 278< / span > TARGET_WITH_SIMD < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > gf256_mul_region_neon(uint8_t *dst, < span class = "keyword" > const< / span > uint8_t *src, uint8_t coeff, < span class = "keywordtype" > size_t< / span > len)< / div >
< div class = "line" > < a id = "l00279" name = "l00279" > < / a > < span class = "lineno" > 279< / span > {< / div >
< div class = "line" > < a id = "l00280" name = "l00280" > < / a > < span class = "lineno" > 280< / span > uint8_t low_tbl[16], hi_tbl[16];< / div >
< div class = "line" > < a id = "l00281" name = "l00281" > < / a > < span class = "lineno" > 281< / span > < a class = "code hl_function" href = "gf256_8c.html#adbf1ecc4540ea968b5503c40e9a95c61" > gf256_build_mul_tables< / a > (coeff, low_tbl, hi_tbl);< / div >
< div class = "line" > < a id = "l00282" name = "l00282" > < / a > < span class = "lineno" > 282< / span > < / div >
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< div class = "line" > < a id = "l00283" name = "l00283" > < / a > < span class = "lineno" > 283< / span > < span class = "preprocessor" > #if defined(__aarch64__) || defined(_M_ARM64)< / span > < / div >
< div class = "line" > < a id = "l00284" name = "l00284" > < / a > < span class = "lineno" > 284< / span > < span class = "comment" > /* AArch64: vqtbl1q_u8 does 16-byte table lookup directly */< / span > < / div >
< div class = "line" > < a id = "l00285" name = "l00285" > < / a > < span class = "lineno" > 285< / span > < span class = "keyword" > const< / span > uint8x16_t low_v = vld1q_u8(low_tbl);< / div >
< div class = "line" > < a id = "l00286" name = "l00286" > < / a > < span class = "lineno" > 286< / span > < span class = "keyword" > const< / span > uint8x16_t hi_v = vld1q_u8(hi_tbl);< / div >
< div class = "line" > < a id = "l00287" name = "l00287" > < / a > < span class = "lineno" > 287< / span > < span class = "keyword" > const< / span > uint8x16_t mask = vdupq_n_u8(0x0F);< / div >
< div class = "line" > < a id = "l00288" name = "l00288" > < / a > < span class = "lineno" > 288< / span > < / div >
< div class = "line" > < a id = "l00289" name = "l00289" > < / a > < span class = "lineno" > 289< / span > < span class = "keywordtype" > size_t< / span > i = 0;< / div >
< div class = "line" > < a id = "l00290" name = "l00290" > < / a > < span class = "lineno" > 290< / span > < span class = "keywordflow" > for< / span > (; i + 16 < = len; i += 16)< / div >
< div class = "line" > < a id = "l00291" name = "l00291" > < / a > < span class = "lineno" > 291< / span > {< / div >
< div class = "line" > < a id = "l00292" name = "l00292" > < / a > < span class = "lineno" > 292< / span > uint8x16_t s = vld1q_u8(src + i);< / div >
< div class = "line" > < a id = "l00293" name = "l00293" > < / a > < span class = "lineno" > 293< / span > uint8x16_t d = vld1q_u8(dst + i);< / div >
< div class = "line" > < a id = "l00294" name = "l00294" > < / a > < span class = "lineno" > 294< / span > uint8x16_t s_lo = vandq_u8(s, mask);< / div >
< div class = "line" > < a id = "l00295" name = "l00295" > < / a > < span class = "lineno" > 295< / span > uint8x16_t s_hi = vandq_u8(vshrq_n_u8(s, 4), mask);< / div >
< div class = "line" > < a id = "l00296" name = "l00296" > < / a > < span class = "lineno" > 296< / span > uint8x16_t lo = vqtbl1q_u8(low_v, s_lo);< / div >
< div class = "line" > < a id = "l00297" name = "l00297" > < / a > < span class = "lineno" > 297< / span > uint8x16_t hi = vqtbl1q_u8(hi_v, s_hi);< / div >
< div class = "line" > < a id = "l00298" name = "l00298" > < / a > < span class = "lineno" > 298< / span > uint8x16_t r = veorq_u8(veorq_u8(lo, hi), d);< / div >
< div class = "line" > < a id = "l00299" name = "l00299" > < / a > < span class = "lineno" > 299< / span > vst1q_u8(dst + i, r);< / div >
< div class = "line" > < a id = "l00300" name = "l00300" > < / a > < span class = "lineno" > 300< / span > }< / div >
< div class = "line" > < a id = "l00301" name = "l00301" > < / a > < span class = "lineno" > 301< / span > < span class = "preprocessor" > #else< / span > < / div >
< div class = "line" > < a id = "l00302" name = "l00302" > < / a > < span class = "lineno" > 302< / span > < span class = "comment" > /* ARMv7 32-bit: vtbl2_u8 uses two 8-byte register pairs for 16-byte table.< / span > < / div >
< div class = "line" > < a id = "l00303" name = "l00303" > < / a > < span class = "lineno" > 303< / span > < span class = "comment" > * Process 8 bytes at a time. */< / span > < / div >
< div class = "line" > < a id = "l00304" name = "l00304" > < / a > < span class = "lineno" > 304< / span > uint8x8x2_t low_v2;< / div >
< div class = "line" > < a id = "l00305" name = "l00305" > < / a > < span class = "lineno" > 305< / span > low_v2.val[0] = vld1_u8(low_tbl);< / div >
< div class = "line" > < a id = "l00306" name = "l00306" > < / a > < span class = "lineno" > 306< / span > low_v2.val[1] = vld1_u8(low_tbl + 8);< / div >
< div class = "line" > < a id = "l00307" name = "l00307" > < / a > < span class = "lineno" > 307< / span > uint8x8x2_t hi_v2;< / div >
< div class = "line" > < a id = "l00308" name = "l00308" > < / a > < span class = "lineno" > 308< / span > hi_v2.val[0] = vld1_u8(hi_tbl);< / div >
< div class = "line" > < a id = "l00309" name = "l00309" > < / a > < span class = "lineno" > 309< / span > hi_v2.val[1] = vld1_u8(hi_tbl + 8);< / div >
< div class = "line" > < a id = "l00310" name = "l00310" > < / a > < span class = "lineno" > 310< / span > < span class = "keyword" > const< / span > uint8x8_t mask8 = vdup_n_u8(0x0F);< / div >
< div class = "line" > < a id = "l00311" name = "l00311" > < / a > < span class = "lineno" > 311< / span > < / div >
< div class = "line" > < a id = "l00312" name = "l00312" > < / a > < span class = "lineno" > 312< / span > < span class = "keywordtype" > size_t< / span > i = 0;< / div >
< div class = "line" > < a id = "l00313" name = "l00313" > < / a > < span class = "lineno" > 313< / span > < span class = "keywordflow" > for< / span > (; i + 8 < = len; i += 8)< / div >
< div class = "line" > < a id = "l00314" name = "l00314" > < / a > < span class = "lineno" > 314< / span > {< / div >
< div class = "line" > < a id = "l00315" name = "l00315" > < / a > < span class = "lineno" > 315< / span > uint8x8_t s = vld1_u8(src + i);< / div >
< div class = "line" > < a id = "l00316" name = "l00316" > < / a > < span class = "lineno" > 316< / span > uint8x8_t d = vld1_u8(dst + i);< / div >
< div class = "line" > < a id = "l00317" name = "l00317" > < / a > < span class = "lineno" > 317< / span > uint8x8_t s_lo = vand_u8(s, mask8);< / div >
< div class = "line" > < a id = "l00318" name = "l00318" > < / a > < span class = "lineno" > 318< / span > uint8x8_t s_hi = vand_u8(vshr_n_u8(s, 4), mask8);< / div >
< div class = "line" > < a id = "l00319" name = "l00319" > < / a > < span class = "lineno" > 319< / span > uint8x8_t lo = vtbl2_u8(low_v2, s_lo);< / div >
< div class = "line" > < a id = "l00320" name = "l00320" > < / a > < span class = "lineno" > 320< / span > uint8x8_t hi = vtbl2_u8(hi_v2, s_hi);< / div >
< div class = "line" > < a id = "l00321" name = "l00321" > < / a > < span class = "lineno" > 321< / span > uint8x8_t r = veor_u8(veor_u8(lo, hi), d);< / div >
< div class = "line" > < a id = "l00322" name = "l00322" > < / a > < span class = "lineno" > 322< / span > vst1_u8(dst + i, r);< / div >
< div class = "line" > < a id = "l00323" name = "l00323" > < / a > < span class = "lineno" > 323< / span > }< / div >
< div class = "line" > < a id = "l00324" name = "l00324" > < / a > < span class = "lineno" > 324< / span > < span class = "preprocessor" > #endif< / span > < / div >
< div class = "line" > < a id = "l00325" name = "l00325" > < / a > < span class = "lineno" > 325< / span > < / div >
< div class = "line" > < a id = "l00326" name = "l00326" > < / a > < span class = "lineno" > 326< / span > < span class = "keywordflow" > for< / span > (; i < len; i++)< / div >
< div class = "line" > < a id = "l00327" name = "l00327" > < / a > < span class = "lineno" > 327< / span > dst[i] ^= low_tbl[src[i] & 0x0F] ^ hi_tbl[src[i] > > 4];< / div >
< div class = "line" > < a id = "l00328" name = "l00328" > < / a > < span class = "lineno" > 328< / span > }< / div >
< div class = "line" > < a id = "l00329" name = "l00329" > < / a > < span class = "lineno" > 329< / span > < / div >
< div class = "line" > < a id = "l00330" name = "l00330" > < / a > < span class = "lineno" > 330< / span > TARGET_WITH_SIMD < span class = "keyword" > static< / span > < span class = "keywordtype" > void< / span > gf256_xor_region_neon(uint8_t *dst, < span class = "keyword" > const< / span > uint8_t *src, < span class = "keywordtype" > size_t< / span > len)< / div >
< div class = "line" > < a id = "l00331" name = "l00331" > < / a > < span class = "lineno" > 331< / span > {< / div >
< div class = "line" > < a id = "l00332" name = "l00332" > < / a > < span class = "lineno" > 332< / span > < span class = "keywordtype" > size_t< / span > i = 0;< / div >
< div class = "line" > < a id = "l00333" name = "l00333" > < / a > < span class = "lineno" > 333< / span > < span class = "keywordflow" > for< / span > (; i + 16 < = len; i += 16)< / div >
< div class = "line" > < a id = "l00334" name = "l00334" > < / a > < span class = "lineno" > 334< / span > {< / div >
< div class = "line" > < a id = "l00335" name = "l00335" > < / a > < span class = "lineno" > 335< / span > uint8x16_t d = vld1q_u8(dst + i);< / div >
< div class = "line" > < a id = "l00336" name = "l00336" > < / a > < span class = "lineno" > 336< / span > uint8x16_t s = vld1q_u8(src + i);< / div >
< div class = "line" > < a id = "l00337" name = "l00337" > < / a > < span class = "lineno" > 337< / span > vst1q_u8(dst + i, veorq_u8(d, s));< / div >
< div class = "line" > < a id = "l00338" name = "l00338" > < / a > < span class = "lineno" > 338< / span > }< / div >
< div class = "line" > < a id = "l00339" name = "l00339" > < / a > < span class = "lineno" > 339< / span > < span class = "keywordflow" > for< / span > (; i < len; i++) dst[i] ^= src[i];< / div >
< div class = "line" > < a id = "l00340" name = "l00340" > < / a > < span class = "lineno" > 340< / span > }< / div >
< div class = "line" > < a id = "l00341" name = "l00341" > < / a > < span class = "lineno" > 341< / span > < / div >
< div class = "line" > < a id = "l00342" name = "l00342" > < / a > < span class = "lineno" > 342< / span > < span class = "keywordtype" > int< / span > have_neon(< span class = "keywordtype" > void< / span > );< / div >
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< div class = "line" > < a id = "l00343" name = "l00343" > < / a > < span class = "lineno" > 343< / span > < / div >
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< div class = "line" > < a id = "l00344" name = "l00344" > < / a > < span class = "lineno" > 344< / span > < span class = "preprocessor" > #endif < / span > < span class = "comment" > /* ARM */< / span > < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a id = "l00345" name = "l00345" > < / a > < span class = "lineno" > 345< / span > < / div >
< div class = "line" > < a id = "l00346" name = "l00346" > < / a > < span class = "lineno" > 346< / span > < span class = "comment" > /* -------------------------------------------------------------------------< / span > < / div >
< div class = "line" > < a id = "l00347" name = "l00347" > < / a > < span class = "lineno" > 347< / span > < span class = "comment" > * Dispatch functions< / span > < / div >
< div class = "line" > < a id = "l00348" name = "l00348" > < / a > < span class = "lineno" > 348< / span > < span class = "comment" > * ------------------------------------------------------------------------- */< / span > < / div >
< div class = "line" > < a id = "l00349" name = "l00349" > < / a > < span class = "lineno" > 349< / span > < / div >
< div class = "foldopen" id = "foldopen00350" data-start = "{" data-end = "}" >
< div class = "line" > < a id = "l00350" name = "l00350" > < / a > < span class = "lineno" > < a class = "line" href = "gf256_8c.html#ad9ea1dd38b7a45e2c9f967c26d7b05df" > 350< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "gf256_8c.html#ad9ea1dd38b7a45e2c9f967c26d7b05df" > gf256_mul_region< / a > (uint8_t *dst, < span class = "keyword" > const< / span > uint8_t *src, uint8_t coeff, < span class = "keywordtype" > size_t< / span > len)< / div >
< div class = "line" > < a id = "l00351" name = "l00351" > < / a > < span class = "lineno" > 351< / span > {< / div >
< div class = "line" > < a id = "l00352" name = "l00352" > < / a > < span class = "lineno" > 352< / span > < span class = "keywordflow" > if< / span > (coeff == 0) < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a id = "l00353" name = "l00353" > < / a > < span class = "lineno" > 353< / span > < span class = "keywordflow" > if< / span > (coeff == 1) { < a class = "code hl_function" href = "gf256_8c.html#a2e7b136d97e3214ff718f46542e276da" > gf256_xor_region< / a > (dst, src, len); < span class = "keywordflow" > return< / span > ; }< / div >
< div class = "line" > < a id = "l00354" name = "l00354" > < / a > < span class = "lineno" > 354< / span > < / div >
< div class = "line" > < a id = "l00355" name = "l00355" > < / a > < span class = "lineno" > 355< / span > < a class = "code hl_function" href = "gf256_8c.html#ab20c63e8967dbedeb2a0fb212e5aa8f8" > gf256_init_tables< / a > ();< / div >
< div class = "line" > < a id = "l00356" name = "l00356" > < / a > < span class = "lineno" > 356< / span > < / div >
< div class = "line" > < a id = "l00357" name = "l00357" > < / a > < span class = "lineno" > 357< / span > < span class = "preprocessor" > #if defined(__x86_64__) || defined(__amd64) || defined(_M_AMD64) || defined(_M_X64) || \< / span > < / div >
< div class = "line" > < a id = "l00358" name = "l00358" > < / a > < span class = "lineno" > 358< / span > < span class = "preprocessor" > defined(__I386__) || defined(__i386__) || defined(__THW_INTEL) || defined(_M_IX86)< / span > < / div >
< div class = "line" > < a id = "l00359" name = "l00359" > < / a > < span class = "lineno" > 359< / span > < span class = "keywordflow" > if< / span > (have_avx2()) { gf256_mul_region_avx2(dst, src, coeff, len); < span class = "keywordflow" > return< / span > ; }< / div >
< div class = "line" > < a id = "l00360" name = "l00360" > < / a > < span class = "lineno" > 360< / span > < span class = "keywordflow" > if< / span > (have_ssse3()) { gf256_mul_region_ssse3(dst, src, coeff, len); < span class = "keywordflow" > return< / span > ; }< / div >
< div class = "line" > < a id = "l00361" name = "l00361" > < / a > < span class = "lineno" > 361< / span > < span class = "preprocessor" > #endif< / span > < / div >
< div class = "line" > < a id = "l00362" name = "l00362" > < / a > < span class = "lineno" > 362< / span > < / div >
< div class = "line" > < a id = "l00363" name = "l00363" > < / a > < span class = "lineno" > 363< / span > < span class = "preprocessor" > #if defined(__aarch64__) || defined(_M_ARM64) || defined(__arm__) || defined(_M_ARM)< / span > < / div >
< div class = "line" > < a id = "l00364" name = "l00364" > < / a > < span class = "lineno" > 364< / span > < span class = "keywordflow" > if< / span > (have_neon()) { gf256_mul_region_neon(dst, src, coeff, len); < span class = "keywordflow" > return< / span > ; }< / div >
< div class = "line" > < a id = "l00365" name = "l00365" > < / a > < span class = "lineno" > 365< / span > < span class = "preprocessor" > #endif< / span > < / div >
< div class = "line" > < a id = "l00366" name = "l00366" > < / a > < span class = "lineno" > 366< / span > < / div >
< div class = "line" > < a id = "l00367" name = "l00367" > < / a > < span class = "lineno" > 367< / span > < a class = "code hl_function" href = "gf256_8c.html#ab25d615b33a0d7af9b9313494ac30f91" > gf256_mul_region_scalar< / a > (dst, src, coeff, len);< / div >
< div class = "line" > < a id = "l00368" name = "l00368" > < / a > < span class = "lineno" > 368< / span > }< / div >
< / div >
< div class = "line" > < a id = "l00369" name = "l00369" > < / a > < span class = "lineno" > 369< / span > < / div >
< div class = "foldopen" id = "foldopen00370" data-start = "{" data-end = "}" >
< div class = "line" > < a id = "l00370" name = "l00370" > < / a > < span class = "lineno" > < a class = "line" href = "gf256_8c.html#a2e7b136d97e3214ff718f46542e276da" > 370< / a > < / span > < span class = "keywordtype" > void< / span > < a class = "code hl_function" href = "gf256_8c.html#a2e7b136d97e3214ff718f46542e276da" > gf256_xor_region< / a > (uint8_t *dst, < span class = "keyword" > const< / span > uint8_t *src, < span class = "keywordtype" > size_t< / span > len)< / div >
< div class = "line" > < a id = "l00371" name = "l00371" > < / a > < span class = "lineno" > 371< / span > {< / div >
< div class = "line" > < a id = "l00372" name = "l00372" > < / a > < span class = "lineno" > 372< / span > < span class = "preprocessor" > #if defined(__x86_64__) || defined(__amd64) || defined(_M_AMD64) || defined(_M_X64) || \< / span > < / div >
< div class = "line" > < a id = "l00373" name = "l00373" > < / a > < span class = "lineno" > 373< / span > < span class = "preprocessor" > defined(__I386__) || defined(__i386__) || defined(__THW_INTEL) || defined(_M_IX86)< / span > < / div >
< div class = "line" > < a id = "l00374" name = "l00374" > < / a > < span class = "lineno" > 374< / span > < span class = "keywordflow" > if< / span > (have_avx2()) { gf256_xor_region_avx2(dst, src, len); < span class = "keywordflow" > return< / span > ; }< / div >
< div class = "line" > < a id = "l00375" name = "l00375" > < / a > < span class = "lineno" > 375< / span > < span class = "keywordflow" > if< / span > (have_ssse3()) { gf256_xor_region_ssse3(dst, src, len); < span class = "keywordflow" > return< / span > ; }< / div >
< div class = "line" > < a id = "l00376" name = "l00376" > < / a > < span class = "lineno" > 376< / span > < span class = "preprocessor" > #endif< / span > < / div >
< div class = "line" > < a id = "l00377" name = "l00377" > < / a > < span class = "lineno" > 377< / span > < / div >
< div class = "line" > < a id = "l00378" name = "l00378" > < / a > < span class = "lineno" > 378< / span > < span class = "preprocessor" > #if defined(__aarch64__) || defined(_M_ARM64) || defined(__arm__) || defined(_M_ARM)< / span > < / div >
< div class = "line" > < a id = "l00379" name = "l00379" > < / a > < span class = "lineno" > 379< / span > < span class = "keywordflow" > if< / span > (have_neon()) { gf256_xor_region_neon(dst, src, len); < span class = "keywordflow" > return< / span > ; }< / div >
< div class = "line" > < a id = "l00380" name = "l00380" > < / a > < span class = "lineno" > 380< / span > < span class = "preprocessor" > #endif< / span > < / div >
< div class = "line" > < a id = "l00381" name = "l00381" > < / a > < span class = "lineno" > 381< / span > < / div >
< div class = "line" > < a id = "l00382" name = "l00382" > < / a > < span class = "lineno" > 382< / span > < a class = "code hl_function" href = "gf256_8c.html#ad1a9a733d8545bb5b217b49aea7aa43a" > gf256_xor_region_scalar< / a > (dst, src, len);< / div >
< div class = "line" > < a id = "l00383" name = "l00383" > < / a > < span class = "lineno" > 383< / span > }< / div >
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< / div >
< div class = "ttc" id = "agf256_8c_html_a1f0071a2ea261bdd2a59cc757a3ce13c" > < div class = "ttname" > < a href = "gf256_8c.html#a1f0071a2ea261bdd2a59cc757a3ce13c" > gf256_div< / a > < / div > < div class = "ttdeci" > uint8_t gf256_div(uint8_t a, uint8_t b)< / div > < div class = "ttdoc" > Divide two elements in GF(2^8).< / div > < div class = "ttdef" > < b > Definition< / b > < a href = "#l00084" > gf256.c:84< / a > < / div > < / div >
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< div class = "ttc" id = "agf256_8c_html_a2e7b136d97e3214ff718f46542e276da" > < div class = "ttname" > < a href = "gf256_8c.html#a2e7b136d97e3214ff718f46542e276da" > gf256_xor_region< / a > < / div > < div class = "ttdeci" > void gf256_xor_region(uint8_t *dst, const uint8_t *src, size_t len)< / div > < div class = "ttdoc" > XOR a region: dst[i] ^= src[i] for all i.< / div > < div class = "ttdef" > < b > Definition< / b > < a href = "#l00370" > gf256.c:370< / a > < / div > < / div >
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< div class = "ttc" id = "agf256_8c_html_a43b3c7a9e2c10d25670fd961ae2916ca" > < div class = "ttname" > < a href = "gf256_8c.html#a43b3c7a9e2c10d25670fd961ae2916ca" > gf256_inv< / a > < / div > < div class = "ttdeci" > uint8_t gf256_inv(uint8_t a)< / div > < div class = "ttdoc" > Compute multiplicative inverse in GF(2^8).< / div > < div class = "ttdef" > < b > Definition< / b > < a href = "#l00092" > gf256.c:92< / a > < / div > < / div >
< div class = "ttc" id = "agf256_8c_html_a49a3de03e67667af04f5c8014fdbe293" > < div class = "ttname" > < a href = "gf256_8c.html#a49a3de03e67667af04f5c8014fdbe293" > gf256_log_table< / a > < / div > < div class = "ttdeci" > static uint8_t gf256_log_table[256]< / div > < div class = "ttdoc" > Log table: gf256_log[x] = discrete log base 2 of x in GF(2^8).< / div > < div class = "ttdef" > < b > Definition< / b > < a href = "#l00041" > gf256.c:41< / a > < / div > < / div >
< div class = "ttc" id = "agf256_8c_html_aa3d36bc7f91e5c5fe01b56acd8ebbbd9" > < div class = "ttname" > < a href = "gf256_8c.html#aa3d36bc7f91e5c5fe01b56acd8ebbbd9" > gf256_tables_initialized< / a > < / div > < div class = "ttdeci" > static int gf256_tables_initialized< / div > < div class = "ttdoc" > Flag to ensure tables are initialized exactly once.< / div > < div class = "ttdef" > < b > Definition< / b > < a href = "#l00046" > gf256.c:46< / a > < / div > < / div >
< div class = "ttc" id = "agf256_8c_html_ab20c63e8967dbedeb2a0fb212e5aa8f8" > < div class = "ttname" > < a href = "gf256_8c.html#ab20c63e8967dbedeb2a0fb212e5aa8f8" > gf256_init_tables< / a > < / div > < div class = "ttdeci" > static void gf256_init_tables(void)< / div > < div class = "ttdoc" > Initialize log/antilog tables for GF(2^8) with polynomial 0x11D.< / div > < div class = "ttdef" > < b > Definition< / b > < a href = "#l00051" > gf256.c:51< / a > < / div > < / div >
< div class = "ttc" id = "agf256_8c_html_ab25d615b33a0d7af9b9313494ac30f91" > < div class = "ttname" > < a href = "gf256_8c.html#ab25d615b33a0d7af9b9313494ac30f91" > gf256_mul_region_scalar< / a > < / div > < div class = "ttdeci" > static void gf256_mul_region_scalar(uint8_t *dst, const uint8_t *src, uint8_t coeff, size_t len)< / div > < div class = "ttdef" > < b > Definition< / b > < a href = "#l00126" > gf256.c:126< / a > < / div > < / div >
< div class = "ttc" id = "agf256_8c_html_ad1a9a733d8545bb5b217b49aea7aa43a" > < div class = "ttname" > < a href = "gf256_8c.html#ad1a9a733d8545bb5b217b49aea7aa43a" > gf256_xor_region_scalar< / a > < / div > < div class = "ttdeci" > static void gf256_xor_region_scalar(uint8_t *dst, const uint8_t *src, size_t len)< / div > < div class = "ttdef" > < b > Definition< / b > < a href = "#l00135" > gf256.c:135< / a > < / div > < / div >
< div class = "ttc" id = "agf256_8c_html_ad692be2f1e47066d0a53e97a3a38eb21" > < div class = "ttname" > < a href = "gf256_8c.html#ad692be2f1e47066d0a53e97a3a38eb21" > gf256_exp_table< / a > < / div > < div class = "ttdeci" > static uint8_t gf256_exp_table[512]< / div > < div class = "ttdoc" > Anti-log (exp) table: gf256_exp[i] = 2^i mod P.< / div > < div class = "ttdef" > < b > Definition< / b > < a href = "#l00043" > gf256.c:43< / a > < / div > < / div >
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< div class = "ttc" id = "agf256_8c_html_ad9ea1dd38b7a45e2c9f967c26d7b05df" > < div class = "ttname" > < a href = "gf256_8c.html#ad9ea1dd38b7a45e2c9f967c26d7b05df" > gf256_mul_region< / a > < / div > < div class = "ttdeci" > void gf256_mul_region(uint8_t *dst, const uint8_t *src, uint8_t coeff, size_t len)< / div > < div class = "ttdoc" > Multiply-accumulate a region: dst[i] ^= GF_mul(src[i], coeff) for all i.< / div > < div class = "ttdef" > < b > Definition< / b > < a href = "#l00350" > gf256.c:350< / a > < / div > < / div >
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< div class = "ttc" id = "agf256_8c_html_adbf1ecc4540ea968b5503c40e9a95c61" > < div class = "ttname" > < a href = "gf256_8c.html#adbf1ecc4540ea968b5503c40e9a95c61" > gf256_build_mul_tables< / a > < / div > < div class = "ttdeci" > static void gf256_build_mul_tables(uint8_t coeff, uint8_t low_tbl[16], uint8_t hi_tbl[16])< / div > < div class = "ttdoc" > Build the two 16-byte nibble lookup tables for a given coefficient.< / div > < div class = "ttdef" > < b > Definition< / b > < a href = "#l00114" > gf256.c:114< / a > < / div > < / div >
< div class = "ttc" id = "agf256_8c_html_af1afff8141cfc915bb37fc01dab39995" > < div class = "ttname" > < a href = "gf256_8c.html#af1afff8141cfc915bb37fc01dab39995" > gf256_mul< / a > < / div > < div class = "ttdeci" > uint8_t gf256_mul(uint8_t a, uint8_t b)< / div > < div class = "ttdoc" > Multiply two elements in GF(2^8) with polynomial 0x11D.< / div > < div class = "ttdef" > < b > Definition< / b > < a href = "#l00077" > gf256.c:77< / a > < / div > < / div >
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