diff options
Diffstat (limited to 'src/liblzma/check/crc32_table.c')
| -rw-r--r-- | src/liblzma/check/crc32_table.c | 34 |
1 files changed, 27 insertions, 7 deletions
diff --git a/src/liblzma/check/crc32_table.c b/src/liblzma/check/crc32_table.c index b11762a..c141cef 100644 --- a/src/liblzma/check/crc32_table.c +++ b/src/liblzma/check/crc32_table.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: 0BSD + /////////////////////////////////////////////////////////////////////////////// // /// \file crc32_table.c @@ -5,18 +7,36 @@ // // Author: Lasse Collin // -// This file has been put into the public domain. -// You can do whatever you want with this file. -// /////////////////////////////////////////////////////////////////////////////// #include "common.h" + +// FIXME: Compared to crc_common.h this has to check for __x86_64__ too +// so that in 32-bit builds crc32_x86.S won't break due to a missing table. +#if defined(HAVE_USABLE_CLMUL) && ((defined(__x86_64__) && defined(__SSSE3__) \ + && defined(__SSE4_1__) && defined(__PCLMUL__)) \ + || (defined(__e2k__) && __iset__ >= 6)) +# define NO_CRC32_TABLE + +#elif defined(HAVE_ARM64_CRC32) \ + && !defined(WORDS_BIGENDIAN) \ + && defined(__ARM_FEATURE_CRC32) +# define NO_CRC32_TABLE +#endif + + +#if !defined(HAVE_ENCODERS) && defined(NO_CRC32_TABLE) +// No table needed. Use a typedef to avoid an empty translation unit. +typedef void lzma_crc32_dummy; + +#else // Having the declaration here silences clang -Wmissing-variable-declarations. extern const uint32_t lzma_crc32_table[8][256]; -#ifdef WORDS_BIGENDIAN -# include "crc32_table_be.h" -#else -# include "crc32_table_le.h" +# ifdef WORDS_BIGENDIAN +# include "crc32_table_be.h" +# else +# include "crc32_table_le.h" +# endif #endif |