1 // SPDX-License-Identifier: 0BSD 2 3 /////////////////////////////////////////////////////////////////////////////// 4 // 5 /// \file crc32_table.c 6 /// \brief Precalculated CRC32 table with correct endianness 7 // 8 // Author: Lasse Collin 9 // 10 /////////////////////////////////////////////////////////////////////////////// 11 12 #include "common.h" 13 14 15 // FIXME: Compared to crc_common.h this has to check for __x86_64__ too 16 // so that in 32-bit builds crc32_x86.S won't break due to a missing table. 17 #if defined(HAVE_USABLE_CLMUL) && ((defined(__x86_64__) && defined(__SSSE3__) \ 18 && defined(__SSE4_1__) && defined(__PCLMUL__)) \ 19 || (defined(__e2k__) && __iset__ >= 6)) 20 # define NO_CRC32_TABLE 21 22 #elif defined(HAVE_ARM64_CRC32) \ 23 && !defined(WORDS_BIGENDIAN) \ 24 && defined(__ARM_FEATURE_CRC32) 25 # define NO_CRC32_TABLE 26 #endif 27 28 29 #if !defined(HAVE_ENCODERS) && defined(NO_CRC32_TABLE) 30 // No table needed. Use a typedef to avoid an empty translation unit. 31 typedef void lzma_crc32_dummy; 32 33 #else 34 // Having the declaration here silences clang -Wmissing-variable-declarations. 35 extern const uint32_t lzma_crc32_table[8][256]; 36 37 # ifdef WORDS_BIGENDIAN 38 # include "crc32_table_be.h" 39 # else 40 # include "crc32_table_le.h" 41 # endif 42 #endif 43