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liblzma: CRC: Add a comment to crc_x86_clmul.h about BUILDING_ macros.

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Lasse Collin 2024-01-11 15:01:50 +02:00
parent 4f518c1b6b
commit fbb3ce541e
1 changed files with 6 additions and 0 deletions
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6
src/liblzma/check/crc_x86_clmul.h
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@ -11,6 +11,12 @@
/// and the public domain code from https://github.com/rawrunprotected/crc
/// (URLs were checked on 2023-10-14).
///
/// While this file has both CRC32 and CRC64 implementations, only one
/// should be built at a time to ensure that crc_simd_body() is inlined
/// even with compilers with which lzma_always_inline expands to plain inline.
/// The version to build is selected by defining BUILDING_CRC32_CLMUL or
/// BUILDING_CRC64_CLMUL before including this file.
///
/// FIXME: Builds for 32-bit x86 use the assembly .S files by default
/// unless configured with --disable-assembler. Even then the lookup table
/// isn't omitted in crc64_table.c since it doesn't know that assembly