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Merge 4afc10ef28 into 82d322c497

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Matevž Kovačič 2026-08-05 23:09:23 -08:00 • committed by GitHub
commit 1e6cffdac7
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1 changed files with 30 additions and 3 deletions
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33
lib/common/compiler.h
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@ -118,8 +118,26 @@
#endif
/* target attribute */
#if defined(__GNUC__) || defined(__IAR_SYSTEMS_ICC__)
/* target attribute
*
* This condition must stay in sync with the one DYNAMIC_BMI2 uses in
* portability_macros.h. clang in MSVC-compatible mode (clang-cl) supports
* __attribute__((__target__)) but does not define __GNUC__, so testing
* __GNUC__ alone silently expands this to nothing while DYNAMIC_BMI2
* remains enabled -- the runtime dispatch then calls _bmi2 entry points
* that were compiled with no BMI2 at all.
*/
#if defined(__has_attribute)
# if __has_attribute(__target__)
# define ZSTD_HAS_TARGET_ATTRIBUTE 1
# endif
#endif
#if !defined(ZSTD_HAS_TARGET_ATTRIBUTE) && \
(defined(__GNUC__) || defined(__IAR_SYSTEMS_ICC__))
# define ZSTD_HAS_TARGET_ATTRIBUTE 1
#endif
#if defined(ZSTD_HAS_TARGET_ATTRIBUTE)
# define TARGET_ATTRIBUTE(target) __attribute__((__target__(target)))
#else
# define TARGET_ATTRIBUTE(target)
@ -183,7 +201,16 @@
* If you can remove a LIKELY/UNLIKELY annotation without speed changes in gcc
* and clang, please do.
*/
#if defined(__GNUC__)
#if defined(__has_builtin)
# if __has_builtin(__builtin_expect)
# define ZSTD_HAS_BUILTIN_EXPECT 1
# endif
#endif
#if !defined(ZSTD_HAS_BUILTIN_EXPECT) && defined(__GNUC__)
# define ZSTD_HAS_BUILTIN_EXPECT 1
#endif
#if defined(ZSTD_HAS_BUILTIN_EXPECT)
#define LIKELY(x) (__builtin_expect((x), 1))
#define UNLIKELY(x) (__builtin_expect((x), 0))
#else