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| author | Lasse Collin <lasse.collin@tukaani.org> | 2024-01-11 15:01:50 +0200 |
|---|---|---|
| committer | Lasse Collin <lasse.collin@tukaani.org> | 2024-01-11 15:25:00 +0200 |
| commit | fbb3ce541ef79cad1710e88a27a5babb5f6f8e5b (patch) | |
| tree | e1e7ba3bf65c264d273734561c74ffe43a3b2d21 /src/liblzma/check/crc_x86_clmul.h | |
| parent | liblzma: CRC: Remove crc_always_inline, use lzma_always_inline instead. (diff) | |
| download | xz-fbb3ce541ef79cad1710e88a27a5babb5f6f8e5b.tar.xz | |
liblzma: CRC: Add a comment to crc_x86_clmul.h about BUILDING_ macros.
Diffstat (limited to 'src/liblzma/check/crc_x86_clmul.h')
| -rw-r--r-- | src/liblzma/check/crc_x86_clmul.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/liblzma/check/crc_x86_clmul.h b/src/liblzma/check/crc_x86_clmul.h index fbf042a5..f407da5c 100644 --- a/src/liblzma/check/crc_x86_clmul.h +++ b/src/liblzma/check/crc_x86_clmul.h @@ -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 |