mirror of https://git.tukaani.org/xz.git
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
// SPDX-License-Identifier: 0BSD
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///////////////////////////////////////////////////////////////////////////////
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//
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/// \file crc32_table.c
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/// \brief Precalculated CRC32 table with correct endianness
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//
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// Author: Lasse Collin
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "common.h"
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// FIXME: Compared to crc_common.h this has to check for __x86_64__ too
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// so that in 32-bit builds crc32_x86.S won't break due to a missing table.
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#if defined(HAVE_USABLE_CLMUL) && ((defined(__x86_64__) && defined(__SSSE3__) \
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&& defined(__SSE4_1__) && defined(__PCLMUL__)) \
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|| (defined(__e2k__) && __iset__ >= 6))
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# define X86_CLMUL_NO_TABLE 1
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#endif
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#if defined(HAVE_ARM64_CRC32) \
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&& !defined(WORDS_BIGENDIAN) \
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&& defined(__ARM_FEATURE_CRC32)
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# define ARM64_CRC32_NO_TABLE 1
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#endif
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#if !defined(HAVE_ENCODERS) && (defined(X86_CLMUL_NO_TABLE) \
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|| defined(ARM64_CRC32_NO_TABLE_))
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// No table needed. Use a typedef to avoid an empty translation unit.
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typedef void lzma_crc32_dummy;
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#else
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// Having the declaration here silences clang -Wmissing-variable-declarations.
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extern const uint32_t lzma_crc32_table[8][256];
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# ifdef WORDS_BIGENDIAN
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# include "crc32_table_be.h"
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# else
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# include "crc32_table_le.h"
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# endif
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#endif
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